tag:blogger.com,1999:blog-70443513529701163902024-03-13T09:59:35.478-07:00JM Radio elektronika, pemancar homebrew AM SSB, pemancar tabung, pemancar transistor, radio vintage JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.comBlogger82125tag:blogger.com,1999:blog-7044351352970116390.post-12683677919173951272023-09-11T22:41:00.004-07:002023-09-11T23:31:07.869-07:00Pemancar AM 75 meter Elwan (dh. Wan SOS 100 meter)<p></p><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;">Ketika itu bertemu sahabat lama era 100 meter namanya Elwan atau WanSOS di Rawa Subur Tanjung Karang yang kala itu satu lokal dengan Komardi, Ikhsan dan Mirza. Kalo sesama mantan 100 meter ketemu pasti mengajak kembali untuk ngebriq tentunya bukan 100 meter (3Mc) tetapi 75 meter (4Mc), </div><div class="separator" style="clear: both; text-align: center;">alhamdulillah beliau menyambut dengan senang hati sampai menunjukkan transistor final TX nya dulu 2SA747 dua buah yang masih disimpan belum pernah terpasang . </div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXaZeP_u74qkSl5PCL2pOUGK6uxGIPgzWESEjn7bIpRAI_giNJUWM5hmr9VCEAds7WmSy02ZWB86cUskf2fxI2TS6OEnhizqI8sPYo0nOGme-aA3QmA18L3NcMNNLzJGX5KLKr7gaozmgwpiVmfo7o-7qjx5SmhX6ApL5WHs_71CMNOGcnq--2xy6lerG6/s4016/IMG_20230121_101415.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3008" data-original-width="4016" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXaZeP_u74qkSl5PCL2pOUGK6uxGIPgzWESEjn7bIpRAI_giNJUWM5hmr9VCEAds7WmSy02ZWB86cUskf2fxI2TS6OEnhizqI8sPYo0nOGme-aA3QmA18L3NcMNNLzJGX5KLKr7gaozmgwpiVmfo7o-7qjx5SmhX6ApL5WHs_71CMNOGcnq--2xy6lerG6/s320/IMG_20230121_101415.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">Singkat cerita agar cepat mengudara saya dan Imex mencarikan TX teman yang sudah tidak dipakai milik Gendon/Misnar/radio aspirin kemudian memodifikasinya. Target power out sekitar 150 watt carrier maka saya pilih mosfet 2xK2611. Setelah dicoba arus drain tanpa dimodulasi menarik 2,5 A, ini sudah cukup dengan sinyal input 7,5 volt puncak Vdd 65 volt. WanSOS sekarang anda sudah dapat merasakan ngebriq jauh-jauh yang diera 100 meter belum merasakan dengan TX final 2SA671 hi hi hi</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTm1d0zW9qFIcUj7TObHTrdNCqO6O2r0Z6zOnJnbJnlIqb8qpoxzhb-z6ZGIGmjq2jn2QmY8E7pMMSuDFOgJ97lNhLWmUPEKdxOph-fnnt99xKkb74ez_9dILyYimDZ5HFU_l0Q_lA_9AV_Jn0R_9qB7-BaxShM8yFbkMWwejWitZEDSPSjOZSo9fvs5SY/s4016/IMG_20230121_101506.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3008" data-original-width="4016" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTm1d0zW9qFIcUj7TObHTrdNCqO6O2r0Z6zOnJnbJnlIqb8qpoxzhb-z6ZGIGmjq2jn2QmY8E7pMMSuDFOgJ97lNhLWmUPEKdxOph-fnnt99xKkb74ez_9dILyYimDZ5HFU_l0Q_lA_9AV_Jn0R_9qB7-BaxShM8yFbkMWwejWitZEDSPSjOZSo9fvs5SY/s320/IMG_20230121_101506.jpg" width="320" /></a></div><div class="separator" style="clear: both; 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text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiaTDmrxvBk7jQZaUupDxucMEmPeuRmr4ttvziWKQmqhxw2ruDzhgSNoSbGYq2t6g0qcfA8Fok2yYeOhZYQDXq7c1ItxYJlMAVqwxjxKaW97BtBBKLJ9KqMDzZt1UAo_rP9so21pIGiSWsycBS6nkC_2lCOHycvz2ot2W7vTqvbPCu3RNc5xyRAhPOB8ut-/s4016/IMG_20230121_101344.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3008" data-original-width="4016" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiaTDmrxvBk7jQZaUupDxucMEmPeuRmr4ttvziWKQmqhxw2ruDzhgSNoSbGYq2t6g0qcfA8Fok2yYeOhZYQDXq7c1ItxYJlMAVqwxjxKaW97BtBBKLJ9KqMDzZt1UAo_rP9so21pIGiSWsycBS6nkC_2lCOHycvz2ot2W7vTqvbPCu3RNc5xyRAhPOB8ut-/s320/IMG_20230121_101344.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;">Sinyal input pada gate-ground final 7,5 Vp</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi45-KiSVxCb6QlCJwQqEgEHFJjhktajUVskXt7NSy3X-QTt9xiIZDlp-0zjSafDYQPl7a23oEdGc2WE_dWfELgLP_ocQAdxoAZsa2KvH5du-4Eq6kyIu63ckkt6Ycbr87FFgoFrZuYzRwECxJs_ynExqWDKZjAm0qwC1LDderbXzt_bb80yBs_zfDZ_zSU/s720/tx-80-m-elwan-.jpeg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="382" data-original-width="720" height="170" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi45-KiSVxCb6QlCJwQqEgEHFJjhktajUVskXt7NSy3X-QTt9xiIZDlp-0zjSafDYQPl7a23oEdGc2WE_dWfELgLP_ocQAdxoAZsa2KvH5du-4Eq6kyIu63ckkt6Ycbr87FFgoFrZuYzRwECxJs_ynExqWDKZjAm0qwC1LDderbXzt_bb80yBs_zfDZ_zSU/s320/tx-80-m-elwan-.jpeg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">VFO menggunakan <a href="http://jmradiodoc.blogspot.com/2020/09/vfo-jadul-selamat-pagi-teman-teman.html" target="_blank">klik disini</a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /> <p></p>JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com1tag:blogger.com,1999:blog-7044351352970116390.post-83850922045318114142023-01-03T18:43:00.007-08:002023-09-11T17:39:31.717-07:00Pemancar AM 75 meter 200 Watt Carrier<p><b>Rancangan:</b></p><p></p><ul style="text-align: left;"><li>Daya output : 200 watt carrier calss C</li><li>Impedansi out: 50 ohm</li><li>Modulasi: AM-Trafo Modulasi</li><li>Band: mono band frekuensi 4 Mc</li><li>Frekuensi generator : Clapp VFO dan DDS eksternal</li><li>Tegangan final = 65 V un-reg</li><li>Tema: tetap klasik</li></ul><p></p><p><br /></p><p><b>Final Amplifier</b></p><p>Dengan daya 200 watt carrier maka impedansi di drain final; Vkuadrat/P = 65kudrat/200= 21 ohm sehingga menarik arus 65/21= 3 amper, jika dimodulasi arus meningkat menjadi 3x1,5= 4,5 amper. Dengan arus 4,5 A maka final dipilih 5 buah mosfet SSH6N80 jadi masing masing mosfet dipekerjakan sekitar 1 A, tidak melebihi ambang batas kurva arus drain kontinyu. Kebetulan mosfet yang tersedia SSH6N80, sebenarnya saya lebih suka K2611. Mosfet tersebut memiliki kapasitan gate-source lumayan rendah sehingga ketika diparalel 5 buah tidak terlalu rendah banget. Kapasitan gate source yang terlalu rendah akibat diparalel akan menyulitkan untuk men-drivenya. </p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjSTBZzK_ETnEK8IE0BzUb8VNUWAPpxKwhAv5oMwwOh5ksGbAu0qCcZ_WHprScNmtG2_RTpA_qjjIvmaeFtYtUAT3X0DTsTcAmwpVm5DZmjhD8qmpBpdACXecmexEoJF5Rkmui15-wG7JptSO_QJOSK3rwUgcz1o4viO--liSDUaKk0InMHBASvDMAVQlu4/s1512/rangkaian%20final.jpeg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1220" data-original-width="1512" height="258" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjSTBZzK_ETnEK8IE0BzUb8VNUWAPpxKwhAv5oMwwOh5ksGbAu0qCcZ_WHprScNmtG2_RTpA_qjjIvmaeFtYtUAT3X0DTsTcAmwpVm5DZmjhD8qmpBpdACXecmexEoJF5Rkmui15-wG7JptSO_QJOSK3rwUgcz1o4viO--liSDUaKk0InMHBASvDMAVQlu4/s320/rangkaian%20final.jpeg" width="320" /></a></div><div><br /></div>Sesuai dengan tema klasik, saya masih mengunakan penyesuai impedansi final dengan coxsial 50 ohm tipe L menggunakan varco besi 800 PF yang di paralel dengan kapasitor keramik tegang tinggi, sehingga kapasitas total sekitar 1500 PF, untuk L 5 lilit diameter 1 " renggang dengan panjang kira kira 1" konstruksi L yang demikian panjang dan diameter hampir sama akan meningkatkan faktor kualitas (Q).<div><br /></div><div>Masih dengan tema klasik. pemodulasian mengunakan trafo modulasi dengan perbandingan 8 ohm: 24 ohm. Pada drain final terdapat lilitan (RL) menggunakan inti toroid karena lebih mudah mendesainya menggunakan software online. Untuk menghitung induktansi RL menggunnakan pendekatan L=RL/(4xf). Induktor tersebut sering diabaikan nilainya tetapi dapat mengakibatkan audio cacat bahkan tidak duduk di center frekuensi, waktu switch on dan off mosfet tidak tepat terhadap induktor melepaskan energinya. Pada desain ini saya menggunakan toroid T106-2 8 lilit kawat emaail 1 mm. </div><div><br /></div><div>Jalur pertemuan antara trafo modulasi dan induktor RL terdapat dioda proteksi 1.5KE130A untuk membatasi over modulasi yang akan mengakibatkan final jebol serta kapasitor 15 nF tegangan tinggi sebagai by pass frekuensi tinggi dijalur tersebut. Pada jalur drain Capasitor shunt (CS), berfungsi untuk meredam tegangan kejut di Drain yang akan membahayakan mosfet. jika tidak menggunakan CS terlihat RF yang besar tetapi arusnya kecil. Nilai CF yang digunakan menurut WA1QIX untuk 80/75 meter 250 pF per mosfet, yang saya gunakan 2 buah 2n2 400 volt diseri adanya itu he hehe.</div><div><br /></div><div>Input didesain matching dengan coaxial 50 ohm dari rangkaian driver, disini saya menngunakan penyesuai impedansi dua buah ferrite beat ukuran panjang 1,5 cm dengan 8 lilitan kemudian dipilin (50 ohm) untuk ke driver dan 1 lilit untuk gate-ground menggunakan kawat besar. Rangkaian driver harus mampu men drive final, sehingga pada gate-ground menghasilkan tegangan sekitar 12 volt puncak (Vp) seperti pada gambar.</div><div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQ2zd6QUmZiA-R6uLzAjP_pv5Ia5SskZ1gJrDOBJbxNbv5i4_0pW1GI-awgquuIuWILFEdbjRFQL7oYrdEv_rZ2QuiXxWa_Ak2AMRdOBI1Ubamll0n-69pKq1A8Hq9_OQq4aTE_ZgcHyG4ArB4A7SSJ1GFqaVUePd3jRHoB28wAeP5CzjdGVxuv8Ku32R0/s1600/12vp%20osc.jpeg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQ2zd6QUmZiA-R6uLzAjP_pv5Ia5SskZ1gJrDOBJbxNbv5i4_0pW1GI-awgquuIuWILFEdbjRFQL7oYrdEv_rZ2QuiXxWa_Ak2AMRdOBI1Ubamll0n-69pKq1A8Hq9_OQq4aTE_ZgcHyG4ArB4A7SSJ1GFqaVUePd3jRHoB28wAeP5CzjdGVxuv8Ku32R0/s320/12vp%20osc.jpeg" width="320" /></a></div><div style="text-align: center;">Sinyal input di gate-groud 12 Vp</div><div class="separator" style="clear: both; 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text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjId9VYwko4D-w_HIG24EK7avv_AGK2iNSgSv8tzpOLenPoe9E1Y3pL-9Jx-l8AoMVNfUiFipZ9kPexBqGWiwZfdE9phg7lbUBh38pBakyQ1cWk_N1trdWa_PR3zV_8qGZvGIHZsksnJWe8HtWHRgCQupWRrh_Olu8Yvu9W0DW1LwueQMHMXhDxw-uFIQ/s4016/Philips_L4X55T_transistorfinal.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4016" data-original-width="3008" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjId9VYwko4D-w_HIG24EK7avv_AGK2iNSgSv8tzpOLenPoe9E1Y3pL-9Jx-l8AoMVNfUiFipZ9kPexBqGWiwZfdE9phg7lbUBh38pBakyQ1cWk_N1trdWa_PR3zV_8qGZvGIHZsksnJWe8HtWHRgCQupWRrh_Olu8Yvu9W0DW1LwueQMHMXhDxw-uFIQ/s320/Philips_L4X55T_transistorfinal.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhcm6-LjlwbVnaXYC_Kicpgt25cncDjdyRzBwZ6i_p-ChINZ1ZOXSyksdzmt1GpiqoHWPFviyx1-YklQ2qYfufpsa9d87Qf7aENKfCj6sFT92AksbFfq9Bo3zqtNQjIprmn67N8AhWYsr0B50WOljv-2ehH6y7X4_SoelDU-zX1LSRYDi9eU9t1xgwIeA/s4016/Philips_L4X55T_ganritransistorfinal.jpg" style="margin-left: 1em; 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text-align: center;"><iframe allowfullscreen="" class="BLOG_video_class" height="266" src="https://www.youtube.com/embed/Zs4x6KbOCqM" width="320" youtube-src-id="Zs4x6KbOCqM"></iframe></div><br />JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-69133039548824111872022-08-07T08:15:00.003-07:002022-08-12T20:48:52.750-07:00Menghidupkan Radio Cawang<p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-oo5mTo_rjwCfxrvQg2LR_v0aej6YzRUd8n0iQaohiGv9f4a2608Ffjj2YYfrayhA_I_SFgiKR4qw8hLUGcHSv-NggL7vVd9H6AMGiLtQbHXxgTOjL5zuy60HDCfX4c7CMVJbdyFPbY5Ys_0rn5pUqeTR_QhSVGlOmywyHUDrGZr7eyyXtJij5VG25g/s4016/IMG_20220807_112330.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3008" data-original-width="4016" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-oo5mTo_rjwCfxrvQg2LR_v0aej6YzRUd8n0iQaohiGv9f4a2608Ffjj2YYfrayhA_I_SFgiKR4qw8hLUGcHSv-NggL7vVd9H6AMGiLtQbHXxgTOjL5zuy60HDCfX4c7CMVJbdyFPbY5Ys_0rn5pUqeTR_QhSVGlOmywyHUDrGZr7eyyXtJij5VG25g/s320/IMG_20220807_112330.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; 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text-align: center;"><iframe allowfullscreen="" class="BLOG_video_class" height="266" src="https://www.youtube.com/embed/UVGfO-uZU8M" width="320" youtube-src-id="UVGfO-uZU8M"></iframe></div><br />JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-92175005491965840232022-07-31T19:37:00.000-07:002022-07-31T19:37:38.834-07:00Menghidupkan Radio Grundig Satellit 2400<p> </p><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: left;">Kondisi radio on tetapi band AM dan FM tidak dapat menerima siaran</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj7cfQ6Xwpp45a8RlseMB9DDjW58GKd_JZ5pJLt8iDDlolNVuNhpDocFQXbGuOwSdp7ZP90kSTy093lx3-K75VzYthjlwO3xT0Lz2CpW7b2NfUf0vD7n_gLkshtI8-Kdz2wFm8q7Ruw2SAhsFOl1koj32iWB8u9nbkncXyFWydLu2KGQFdiJ1fDZWsqKg/s4016/Grundig_satellit2400.jpg" imageanchor="1" style="margin-left: 1em; 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text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiKZOVdYwm4z8ongaleq-RbL9WKPn3TQN68L5jseJq7WK0fylLZZP7e0K8UH3TkGitAKVXDi_nF8svMYeEtbaD5RTeuLaHfUn7FagneOeIYwt-OaFCZzrr40CMLso36tWoA0vNgSecdSwzHaYFi4peTpHr7zrB4aenzMe7NkW01viBW2t0foPlh3LzlWw/s4016/Grundig_satelli2400_VCO.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3008" data-original-width="4016" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiKZOVdYwm4z8ongaleq-RbL9WKPn3TQN68L5jseJq7WK0fylLZZP7e0K8UH3TkGitAKVXDi_nF8svMYeEtbaD5RTeuLaHfUn7FagneOeIYwt-OaFCZzrr40CMLso36tWoA0vNgSecdSwzHaYFi4peTpHr7zrB4aenzMe7NkW01viBW2t0foPlh3LzlWw/s320/Grundig_satelli2400_VCO.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKianZW7vFn0cXiLTbjljLvQepT_Xy8s1S30qDucX0QFRbciqGvgN3ftsnZyTD0ITEfeHPdCs_wyD7N6He4rsuszdxaaaq2LUQjxIHTfiFZWsdntWlFar-xM4torp11CqdLNcugt_NkAXX8yQ2Smgi5TXVaT-7VwCzUcjjCVba7i6cFv_mS-0KnSFi0w/s4016/Grundig_Satellit2400_switch%20antena.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em; text-align: center;"><img border="0" data-original-height="3008" data-original-width="4016" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKianZW7vFn0cXiLTbjljLvQepT_Xy8s1S30qDucX0QFRbciqGvgN3ftsnZyTD0ITEfeHPdCs_wyD7N6He4rsuszdxaaaq2LUQjxIHTfiFZWsdntWlFar-xM4torp11CqdLNcugt_NkAXX8yQ2Smgi5TXVaT-7VwCzUcjjCVba7i6cFv_mS-0KnSFi0w/s320/Grundig_Satellit2400_switch%20antena.jpg" width="320" /></a><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><div><br /></div>Test memory chanel FM<br /><p></p><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dyCyf_1RAiQEeWtrLaeqi42Dl7mwSp1kCeIda50tuVeRANDZJreXph6sIqEKbUzHO4hJFfMg-gnmQdZ5SlUQQ' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div><br /><div>Test tuning FM</div><div><br /></div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dyFaxOx8ul0VFIRzO5woSjhc31TjpXddPWS5fkCiJzg3c-FWD5TAXVjJvzNNKxUCCm_L14N9WfOymp28bwqQA' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div><br /><div><br /></div><div><br /></div><div><br /></div><div>Test AM SW3</div><div><br /></div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen="" class="BLOG_video_class" height="266" src="https://www.youtube.com/embed/y9pMipwE_gY" width="320" youtube-src-id="y9pMipwE_gY"></iframe></div><br /><div><br /></div><div><br /></div><div><br /></div>JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-69375551972763639392022-07-26T01:33:00.004-07:002022-07-26T05:13:47.472-07:00Menghidupkan Radio Sanyo RP2127<p></p><div class="separator" style="clear: both; text-align: justify;">Radio Sanyo model RP2127 ini dibeli dari toko on line dengan kondisi un tested. Tertarik dengan penampilan yang cukup mempesona walaupun masih ragu apakah masih menggunakan transistor atau IC, Setelah radio diterima serta dibuka covernya, ternyata masih menggunakan transitor kobinasi transistor NPN dan PNP klasik. Transistor PNP klasik digunakan pada bagian penguat akhir. Kabel power suplly 4,5 volt dari battrai putus, setelah disambung ada suara sinyal IF dari speaker walaupun kecil. Mulai identifikasi masalah dengan mengorek-ngorek bagian penguat akhir sampai mixer oscilator, berfungsi semua tetapi tidak menerima siaran. Terlihat ada satu resistor pada bagian mix-osc yang berbeda, dilepas saja, pasti ini tambahan.</div><div class="separator" style="clear: both; text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi7Yj8--8VkNrMp9IqCZi_fArZz0KRUbzMJRQm04UPQN9cqm2aeWLCt7w7rW75Q1VCBt_FWt3Ygh2Y7pc-nrFHDKCiLdG-vcBO0VkimVc6aIJ7uTZhnogUFcJsqTrnfzRq_NLUbMIdQAQhk05kL7Wz_Cib1C7wdpzA7rIcSoLMt4_nWy4jQxw6Ie-CEHg/s4016/Radio%20sanyo%20_1.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4016" data-original-width="3008" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi7Yj8--8VkNrMp9IqCZi_fArZz0KRUbzMJRQm04UPQN9cqm2aeWLCt7w7rW75Q1VCBt_FWt3Ygh2Y7pc-nrFHDKCiLdG-vcBO0VkimVc6aIJ7uTZhnogUFcJsqTrnfzRq_NLUbMIdQAQhk05kL7Wz_Cib1C7wdpzA7rIcSoLMt4_nWy4jQxw6Ie-CEHg/s320/Radio%20sanyo%20_1.jpg" width="240" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: justify;">Setelah resistor yang berbeda dilepas, radio belum juga bersuara. Perhatian tertuju ke lilitan tuning antena yang solderannya beberapa titik berbeda, curiga mungkin tertukar. Ternyata benar, tertukar antara lilitan tuning antena antara MW dan SW yang terhubung ke varco. Ahaaaaai suara sinyal IF terdengar normal dispeaker, tapi belum juga menerima siaran. Dugaan terakhir transistor mix-osc sudah lemah. Sambil istirahat sejenak coba memperhatikan bagian mix-osc, ternyata untuk band MW osc disuntikkan ke basis melalui lilitan ferrit antena sedangkan band SW osc disuntikan langsung ke emitor transistor mix-osc.</div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgY7IY_hsonMg8MqZTrRvabvj6X83UgCT11bc1y8-uk7nybmKSNrmhyrYYIr3kNBC1AFz5hicW5H7YwDXIKqK5wjngTKFd_aPFM7yZ6A1j7_DpcLNJOtUx6YJRkARjNBtXJy4sWl7Tw-h7K8FuQd-EdiFapIn0SAZHEaAuy_kLA4MLB1MBMSduh_oM9lg/s3380/Radio%20Sanyo_2.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2295" data-original-width="3380" height="217" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgY7IY_hsonMg8MqZTrRvabvj6X83UgCT11bc1y8-uk7nybmKSNrmhyrYYIr3kNBC1AFz5hicW5H7YwDXIKqK5wjngTKFd_aPFM7yZ6A1j7_DpcLNJOtUx6YJRkARjNBtXJy4sWl7Tw-h7K8FuQd-EdiFapIn0SAZHEaAuy_kLA4MLB1MBMSduh_oM9lg/s320/Radio%20Sanyo_2.jpg" width="320" /></a></div><p><br /></p>Mencari-cari transitor C930 pengganti cukup tersedia di kotak rongsok karena sering digunakan untuk RF seperti C829, C380, C372. Woww setelah diganti, suara sinyal IF terdengan lebih kuat hingga interferensi dari lampu pun masuk, band SW telah berfungsi menerima siaran dari luar negeri tetapi MW yang lokal RRI Tanjung Karang tidak terdengar. Berhubung saya tidak butuh siaran MW radio pun dipasang covernya. <br /><div class="separator" style="clear: both; text-align: center;"><br /></div><p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhPekq_xjuY4MCKAaLqPqBIvoPYIOTb8yLLxBB3Vb-kJGoSUP3yojrCtVkeQnV5uCpXn_mZg35TnYz8o9amJR2dZTjfRvJRNOAkeTswl3JnWfdf2CCMzrUovzsSoVBrCdWEsNXdH5GT61GO3ppNVngD3JCm8QZBa8o69bieQS2DafhCAy7Ex235S0YxcA/s3136/Radio%20Sanyo_4.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2015" data-original-width="3136" height="206" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhPekq_xjuY4MCKAaLqPqBIvoPYIOTb8yLLxBB3Vb-kJGoSUP3yojrCtVkeQnV5uCpXn_mZg35TnYz8o9amJR2dZTjfRvJRNOAkeTswl3JnWfdf2CCMzrUovzsSoVBrCdWEsNXdH5GT61GO3ppNVngD3JCm8QZBa8o69bieQS2DafhCAy7Ex235S0YxcA/s320/Radio%20Sanyo_4.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglSeEoFBW-Yp6ew4QzMw54jxdRaIdTdEu5EU_AzzWZL5rNWIVcQQ7IB5xtsrnNHPdeK4aqp3DL612-qZ329nePEc7zqbhrH_mlvjVodquvIZErhcOqGIrAvxkBj7Nmnr1ue39M0fo299pluD1CeINb9WY5CYCeZCCiSCTKR1s2ANNLnthb5JyPcilYIA/s3836/Radio%20Sanyo3.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2571" data-original-width="3836" height="214" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglSeEoFBW-Yp6ew4QzMw54jxdRaIdTdEu5EU_AzzWZL5rNWIVcQQ7IB5xtsrnNHPdeK4aqp3DL612-qZ329nePEc7zqbhrH_mlvjVodquvIZErhcOqGIrAvxkBj7Nmnr1ue39M0fo299pluD1CeINb9WY5CYCeZCCiSCTKR1s2ANNLnthb5JyPcilYIA/s320/Radio%20Sanyo3.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: justify;">Waktu sudah menunjukkan jam 22 :00, beres-beres peralatan dan bergegas ke peraduan sambil nenteng radio hihihi. Coba dial MW lagi, ternyata siaran RRI yang cuma satu satunya siaran MW di Lampung terdengar jelas, ternyata saat diruang ngoprek tertimpa oleh interferensi lampu. Lelah dan ngatukpun hilang, langsung ambil obeng trim untuk menetapkan frekuensi RRI yang terlihat bergeser.</div><br /><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen="" class="BLOG_video_class" height="266" src="https://www.youtube.com/embed/gdcgyusKYDw" width="320" youtube-src-id="gdcgyusKYDw"></iframe></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br />JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-33659531483379452312022-07-11T21:41:00.001-07:002022-07-16T16:17:25.690-07:00Menghidupkan AM Radio Grundig Satellit 2100<p> </p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJKn-4FHxnNY3Dhn8jaX8VI8gAsf3kkLrqz7aNPFcetPqJw3wGj6y_dqR6wqaWTGrz1tZgUO_ppfEBpktZ-7BPw5hFf7QzlN9XUpD4B_JyXyA4fWUf0ufxks31vhxxirZeTZJiQZ10163wDQarBm5NlpvD5lQ3oXGxt3JEL3dY7g7BXVTyTH9HPkqVmA/s4016/IMG_20200106_180852.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4016" data-original-width="3008" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJKn-4FHxnNY3Dhn8jaX8VI8gAsf3kkLrqz7aNPFcetPqJw3wGj6y_dqR6wqaWTGrz1tZgUO_ppfEBpktZ-7BPw5hFf7QzlN9XUpD4B_JyXyA4fWUf0ufxks31vhxxirZeTZJiQZ10163wDQarBm5NlpvD5lQ3oXGxt3JEL3dY7g7BXVTyTH9HPkqVmA/s320/IMG_20200106_180852.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiI-RAmmcBRrQclf5N4-7OAYlu0FX0F3HrBhKQPM4IjQ2WLlCNUZFAnTTSdb4wy-dd_U06snWKlzD7BBfQ6lbnvgk_7f5wvVONGFnrDxyI6nfQyA4mm9k3m9UlbPbiepuy-7ohaXikOSHfT89b7Sqpc_8fXM60le9Gbnep2CB_jBl2_4hWG1m53Q0MsKQ/s4016/IMG_20200106_180749.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3008" data-original-width="4016" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiI-RAmmcBRrQclf5N4-7OAYlu0FX0F3HrBhKQPM4IjQ2WLlCNUZFAnTTSdb4wy-dd_U06snWKlzD7BBfQ6lbnvgk_7f5wvVONGFnrDxyI6nfQyA4mm9k3m9UlbPbiepuy-7ohaXikOSHfT89b7Sqpc_8fXM60le9Gbnep2CB_jBl2_4hWG1m53Q0MsKQ/s320/IMG_20200106_180749.jpg" width="320" /></a></div><p>Kerusakan dibagian osilator AM, transistor sudah tidak berfungsi dan kapasitor trimer hubung singkat. Transistor osilator diganti dengan buatan Jepang, untuk pengganti kapasistor trimer masih dapat yang original dari toko on-line.</p><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhlMPt26eVbnGNqWFbpYvSVKkdIRSxrQ0RgmYsBvJnaQvMX5T3kgS3YabzMeJGwuT5KNsrYWzBLsGKrduF3FLlypk2a8qRIxYLTw0ZhFhPkOOWCJEYC_37WBuQx8OkaZsgm75I7v11dC215gxAYw5mk6VS6nS07xeaqCW4eq_tKltsSzvjLfdmX9phSEQ/s4016/IMG_20200105_130209.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4016" data-original-width="3008" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhlMPt26eVbnGNqWFbpYvSVKkdIRSxrQ0RgmYsBvJnaQvMX5T3kgS3YabzMeJGwuT5KNsrYWzBLsGKrduF3FLlypk2a8qRIxYLTw0ZhFhPkOOWCJEYC_37WBuQx8OkaZsgm75I7v11dC215gxAYw5mk6VS6nS07xeaqCW4eq_tKltsSzvjLfdmX9phSEQ/s320/IMG_20200105_130209.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJmzexBzELBiBqb4v_gwWWjwZg5c1pznSmXjNV7vSAe6WdmlnBWpvmCWhRwB17HJiB1wzSmex3UtKlAkIaDfdXv1Z3u-pheAbKqM4Qu2C4Qd9eHH2E-QlUFPoKw4mAm0g6FM2W9wbQNPPB0PTU2q5xn81GOc94hM6z-Kyfvsq7hObnc7iJFxB3ToVGwg/s3229/grundig%20satelit1000.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2289" data-original-width="3229" height="227" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJmzexBzELBiBqb4v_gwWWjwZg5c1pznSmXjNV7vSAe6WdmlnBWpvmCWhRwB17HJiB1wzSmex3UtKlAkIaDfdXv1Z3u-pheAbKqM4Qu2C4Qd9eHH2E-QlUFPoKw4mAm0g6FM2W9wbQNPPB0PTU2q5xn81GOc94hM6z-Kyfvsq7hObnc7iJFxB3ToVGwg/s320/grundig%20satelit1000.jpg" width="320" /></a></div><p></p><p> Terimakasih google untuk skemanya, lupa sumbernya he he he</p><p><br /></p><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dyJtWT72rgjiy8TRzyvVkHMN4SAkGEsva16iUXNij-2dvcjdGP01NGH8ReX6GRnAgRGImt2KMwMuCwPay_1_w' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dw-p9QdZrx9RVnZIQsKFj0p3eP38sLmDttoVn3FvHWockDe8WWyZHoodwL8V2Br1bElfq5jvki_Am_3AWRmIQ' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><p><br /></p>JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-39514387058957576472021-06-25T00:16:00.003-07:002021-06-26T01:05:10.699-07:00Up date TX Bpk Imek 2021<p> </p><p>Setelah pemakaian lebih dari lima tahun serta sudah sulitnya untuk kontak dengan rekan rekan lokal karena tingginya interferen, Bpk Imek memutuskan untuk membesarkan daya pancar TX nya. <a href="http://jmradiodoc.blogspot.com/2015/02/pemancar-am-80-meter-3x6146.html" target="_blank">Klik disini perakitan TX Imek TH 2015</a>. Penambahan daya hanya menambahkan satu tube 6146 yang sebelumnya 2 tube menjadi 3 tube, keinginannya 4 tetapi satu tube rusak. </p><p><br /></p><p>Penambahan satu tube akan mengubah tegangangan screen dan driving power (exitasi). Dengan 3 tube Ig menjadi sekitar 3x4 mA=12 mA dan I screen 3x12 mA= 36 mA. Untuk mendapatkan Ig 12 mA dengan meningkatkan (menurunkan nilai resistor) tegangan screen driver tube 6V6. Untuk menentukan nilai resistor screen final mudahnya dengan melihat data tube 6146, dengan Va 600 V, R screen 37 kOhm sehingga untuk 3 tube; 37k/3= 12,33 k Ohm, atau dengan cara mengitung jatuh tegangan di screen; Va-Vscreen/Iscreen = 6000-150=450, 450/0,036 = 12 k Ohm. Untuk daya resistornya= 450x0,036= 16,2 watt dipilih 20 watt. Catatan: jangan memberikan eksitasi ke final melebihi data karena kanan meningkatkan arus screen/menurunkan tegangan screen</p><p><br /></p><p>Ok sudah selesai, saaat dicoba ketika posisi st-by terjadi lompatan api pada kontak relay pemutus tegangan tube final, maka diputuskan memasang relay bias sekaligus proteksi, yaitu saat st-by, grid mendapat teganan bias -100 V dan saat on air -85 V. Dengan 3 tube 6146 tua dapat diload 200 mA lebih pada antena V terbalik balun 1:1, lumayan.</p><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgaZulWu3EDHztM2vLRWe223KFhBMKCuIqa-F0zmuyLxd0Jx0ifVr0ZdMW_H-4GFXtH1nteZ_SE2411nGBNNpFzQTpkdPSz_YHQOYkNebRTjDMyc33IoKG3b4JPiog6EtOsWCN_DXXnzMaV/s2048/6146_bias_protec.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2048" data-original-width="1532" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgaZulWu3EDHztM2vLRWe223KFhBMKCuIqa-F0zmuyLxd0Jx0ifVr0ZdMW_H-4GFXtH1nteZ_SE2411nGBNNpFzQTpkdPSz_YHQOYkNebRTjDMyc33IoKG3b4JPiog6EtOsWCN_DXXnzMaV/s320/6146_bias_protec.jpg" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNdgm6sZqkf661-qejBb_v6vbjDsZYzwW7ZdDuTY-zldDhywsWnkX8fR_f8FnmCiJ8sadYHupaFZx267lL9DmF7OBbkgWhN2dMAMHeXTYSigf2KOCbzn6LJIW397pXv_oqQtRdfbQAW3Ho/s2048/6146_paralel.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1532" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNdgm6sZqkf661-qejBb_v6vbjDsZYzwW7ZdDuTY-zldDhywsWnkX8fR_f8FnmCiJ8sadYHupaFZx267lL9DmF7OBbkgWhN2dMAMHeXTYSigf2KOCbzn6LJIW397pXv_oqQtRdfbQAW3Ho/s320/6146_paralel.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioffifGnzvEUoUhJ8flBCDHRjDnLkCGcDtU0bCS0VbnyvKJj-hdDC8u7EqFQgmtTGlwupC4V0aqCkBzdbfOT_-_z2_olVBJS9FA9QSnRnIvcqXfDjBMeOya__HDMgvM_nEhPKM4XQEVnFm/s2048/6146_screen.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2048" data-original-width="1532" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioffifGnzvEUoUhJ8flBCDHRjDnLkCGcDtU0bCS0VbnyvKJj-hdDC8u7EqFQgmtTGlwupC4V0aqCkBzdbfOT_-_z2_olVBJS9FA9QSnRnIvcqXfDjBMeOya__HDMgvM_nEhPKM4XQEVnFm/s320/6146_screen.jpg" /></a></div><br /><div><br /></div><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dwIlMwbefLHq3rZ9RlQo2POdeGgBplS2HsUMSatS641HkJ9fflCXaTsrcAi8kJJWA3z3S2DWVWip-iRtkKEXg' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div><br /><div><br /></div>JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-90207307607687951242020-11-07T20:18:00.003-08:002020-11-07T20:18:35.000-08:00FINISHING RADIO ABENK (lanjutan)<p> Salam jumpa AMers khusunya tube lover</p><p>Pada kesempatan ini saya berbagi finishing <a href="http://jmradiodoc.blogspot.com/2020/09/abenk-radio-reborn.html" target="_blank">radio Abenk</a>. Postingan sebelumya masih terdapat masalah, audio (informasi) belum "duduk" di carrier (gelombang pembawa) sehingga pada penerimaan teman-teman DX sulit untuk dicerna audionya, yaaah audio berada di sisi upper dan lower sedangkan di center rusak. Pemancar Abenk yang rakit saya dan Oni Radio Kuno, saya mengegerjakan osilator sampai driver, final jatahnya Oni, jadi ketidak sesuaian bisa terjadi, Bang Oni gak mau utak atik selain final ha ha. Maklumlah pada tahap awal tersebut ada berbagai komponen yang belum fix dan pengukuran-pengukuran belum final.</p><p>OK, mari kita mulai.....</p><p>Sudah saya prediksi, pemancar dengan banyak tingkat dengan komponen-komponen bekas (seadanya) berpotensi ada masalah, perlu penyesuaian-penyesuaian. Saya mulai dengan mengganti kapasitor feedback osilator dengan silver mika nilainya 530 PF. Kemudian saya jalankan osilator dan mengukur output dengan frequency counter, hasilnya lumayan, dalam 1,5 menit tidak terjadi pergeseran di 1 kHz.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfNN9f7ADEQSmR8ejQAEHJpx1cjtwwAipUn4CODLGkUzZNBNkW0eNDpRApgOp1au38BBA653KKN1CVWKhDQOW7uMVE0R9XDnum-oevKjgM8e-SN5UUdzLJX7Jnzqd78wiXTeaamN1x5TKf/s2048/AM+transmitter1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2048" data-original-width="1532" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfNN9f7ADEQSmR8ejQAEHJpx1cjtwwAipUn4CODLGkUzZNBNkW0eNDpRApgOp1au38BBA653KKN1CVWKhDQOW7uMVE0R9XDnum-oevKjgM8e-SN5UUdzLJX7Jnzqd78wiXTeaamN1x5TKf/s320/AM+transmitter1.jpg" /></a></div><br /><p>Selanjutnya bagian buffer, saya terapkan kelas A dengan kombinasi bias katoda dan R grid. Kemudian jalankan osilator-buffer, mengukur output apakah ada pergeseran frekueansi, alhamdulilah no problem.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKjyzG18tEFCbXjFycf9w7QVUbQLpGtECQE9bLpCu3PK2nw6HSsGIiFBvlfYCYv3Jd8tmCv1UvPpekDgLhyphenhyphen1BIbqFdb7rc7chGQ3d5NbAgCcYLCc7ssdQVgqGV0ja6PgC6X333IhKtTpdU/s2048/AM+transmitter2.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2048" data-original-width="1532" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKjyzG18tEFCbXjFycf9w7QVUbQLpGtECQE9bLpCu3PK2nw6HSsGIiFBvlfYCYv3Jd8tmCv1UvPpekDgLhyphenhyphen1BIbqFdb7rc7chGQ3d5NbAgCcYLCc7ssdQVgqGV0ja6PgC6X333IhKtTpdU/s320/AM+transmitter2.jpg" /></a></div><br /><p>Berlanjut ke bagian driver, saya ukur resonasi dengan frequency counter sambil osilator-buffer dijalankan ternyata bergeser frekuensi lebih dari 1 kHz, nah ini dia penyakitnya he he. Karena lilitan resonansi sudah diberi tap saya cari-cari dimana titik yang beresonansi sesuai osilaotr. Nah......ketemu, tapi tidak bisa persis sama dengan osilator, pada resonansinya terjadi perbedaan sekita 500 hz, saya pikir oklah gak papa, harap maklum ha ha.</p><p>Bagian final gak masalah, saya hanya mengubah power driving saja dengan R grid (dibuat Oni automatic bias) 5,7 k dan bias -90 maka arus grid sekitar 15 mA, lumayanlah untuk 4x807 bekas. Selesai....., saya coba contack denga teman-teman lokal, alhamdulillah oke.</p><p>Setelah dipancarkan dari rumah Dono (radio Abenk), alhamdulilah teman teman DX belum ada yang mengeluh dengan modulasinya, Contack dengan temen teman jawa barat, sumatra selatan, Banka Belitung, lancar jaya, yang lumayan jauh temen-temen dari Jawa Tengah dan Timur seperti Pak Tulus, Firma dll. Berikut ini skemanya, tetapi beberapa nilai komponen lupa dan lilita perlu eksperiman tergantung kapasistas varco.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjFdMUloCu1t_Sf3Ua5VNxeospf7Md7poRaOE_G67FT6UYLsLiULD5p7eXRLdndn9Hs46HfFkJUFuoN7vDE7Yyr2qsJndXMDU0Ar1r809BXCg21vP91AwaXcJTKHylIj8lyu2j40jtFhZ79/s2048/AM+transmitter4.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1106" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjFdMUloCu1t_Sf3Ua5VNxeospf7Md7poRaOE_G67FT6UYLsLiULD5p7eXRLdndn9Hs46HfFkJUFuoN7vDE7Yyr2qsJndXMDU0Ar1r809BXCg21vP91AwaXcJTKHylIj8lyu2j40jtFhZ79/s320/AM+transmitter4.jpg" width="320" /></a></div><br /><p>Terrima kasih</p><p>Salam 73</p><p><br /></p><p><br /></p><p><br /></p><p><br /></p><p><br /></p>JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-74840049486044780072020-10-27T23:35:00.000-07:002020-10-27T23:35:11.220-07:00Ngoprek radio SSB ku<p>Hampir 2 tahun radio SSB ngambek gak mau mancar hanya bisa nge-receive. Saat ini saya punya waktu untuk ngoprek dan lagi propagasi lagi sedang tidak bagus, maklum sudah musim kemarau. Radio SSB ini saya beli jadi (modul) dari Pak Dian Bandung (Ham Builder). Keputusan untuk membeli dikarenakan saya sudah tidak banyak waktu untuk merakit yang rumit-rumit dan memakan waktu yang panjang. Saya menambahkan penguat linear low cost mosfet tetapi karena menurut saya kurang memuaskan dibongkar kembali, Kurang memuaskannya adalah menyedot arus yang begitu banyak he he.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4FnGloXDThjnKc2j-RwpUn6HB_RPscIpqzzxMGzwyESmkIzQYVO6YEUuAyPyldxC1nHq1SaQTRGAnYBVAfhxfyZdlGU7UxiWQqml3JeppWT-o13ew9_LdLjRAkXUPiqWI2F3wkqwS0Jv5/s2048/SSB+40+meter1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1532" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4FnGloXDThjnKc2j-RwpUn6HB_RPscIpqzzxMGzwyESmkIzQYVO6YEUuAyPyldxC1nHq1SaQTRGAnYBVAfhxfyZdlGU7UxiWQqml3JeppWT-o13ew9_LdLjRAkXUPiqWI2F3wkqwS0Jv5/s320/SSB+40+meter1.jpg" width="320" /></a></div><div><br /></div>Ok mulai ngoprek........<div>Berbekal multi meter dan frekquency counter saja, dimulai dengan mengecek sinyal di balanace modulator, RF Ok tetapi AF dari pre amp mic gak ada, langsung saya cabut transistornya ganti dengan C828, alhamdulilah sudah keluar sinyal dari balance modulator. Merambah ke bagian selanjutnya, filter OK, balance mixer OK, BPF OK, dipenguat RF bermasalah, ternyata resistor pembagi tegangan yang ke positif putus, saya ganti dengan resistor metal film 1/4 watt. Selanjutnya transistor berikutnya OK, tetapi ada yang aneh menurut saya, cara pemasangan potensio gain RF, lupakan dulu kembali ke transistor berikutnya, pengukuran OK tetapi sinyalnya kecil, langsung saya cabut terlihat BD 139, saya ganti dengan transistor RF C1957 persamaan C 2028 hasilnya OK. Kembali ke potensio gain RF, saya modifikasi sedikt menambahkan C kopel 100n sehingga tegangan di kolektor tidak terhubung langsung ke potensio, Saya atur potensio sehingga tidak berlebihan dan terjadi osilasi di penguat akhir.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiobxrxZIf9Cd8J7xp9WP6cpxScYgoY8AKF9tQqkgbu5Zvh1kokcWgySDFkKKorQN_ndEdB-dj15Plec6pRPvWynD6QPATEjX0SVrgybxRfG04GVbU1Papy5OqpYJZvcHavmBaPCKs5FbjY/s2048/SSB+40+meter2.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1536" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiobxrxZIf9Cd8J7xp9WP6cpxScYgoY8AKF9tQqkgbu5Zvh1kokcWgySDFkKKorQN_ndEdB-dj15Plec6pRPvWynD6QPATEjX0SVrgybxRfG04GVbU1Papy5OqpYJZvcHavmBaPCKs5FbjY/s320/SSB+40+meter2.jpg" width="320" /></a></div><br /><div><br /><p>Test beberapa kali ngoceh panjang OOOKKKEEEE, AAAAA........SIUL....... transistor final OKE OKE saja. Ngoprek selesai, copot dummy load ganti dengan antena, jajal untuk terbang walaupun daya yang minim, lumayan bisa contact dengan Karang Anyar Jawa Tengah.</p><p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjELYMCCrpI-uBpKFyIuthUAhklGIBgWAanLW_EkXveLKj1cTS85_HP75MAc2wmN8kFtbQ-M9tyOvv_pBRgyhzgAPUTFAQX1RvoxQDon5LsZM9HQ2doP6PVmgmJ0kUR3Zj0ZgHyOqEIQwkr/s2048/SSB+40+meter3.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1536" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjELYMCCrpI-uBpKFyIuthUAhklGIBgWAanLW_EkXveLKj1cTS85_HP75MAc2wmN8kFtbQ-M9tyOvv_pBRgyhzgAPUTFAQX1RvoxQDon5LsZM9HQ2doP6PVmgmJ0kUR3Zj0ZgHyOqEIQwkr/s320/SSB+40+meter3.jpg" width="320" /></a></div><br /> <p></p><p>Selanjut saya akan membuat Pengaut RF Linear dari Transistor VHF.........</p><p>Salam 73</p></div>JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-88421951280380685252020-09-30T18:59:00.001-07:002020-09-30T20:28:54.843-07:00Abenk Radio Reborn<p> </p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTav7le3WTW1gPXN0yAOBwdp6lkxSl9QJBbWlJVbhz8TtQKCmd75OiBA9J3Gr16dKZF6siESgmXlQFnzml6m7eu0fOOW9ltZzoJlCFwVjf_Rv4huTArFyTnH2R0RU8wN1TZmYAMwXDKZgT/s2048/Radio+Abenk.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1532" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTav7le3WTW1gPXN0yAOBwdp6lkxSl9QJBbWlJVbhz8TtQKCmd75OiBA9J3Gr16dKZF6siESgmXlQFnzml6m7eu0fOOW9ltZzoJlCFwVjf_Rv4huTArFyTnH2R0RU8wN1TZmYAMwXDKZgT/s320/Radio+Abenk.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: justify;">Ditahun 2020 ini temen-temen yang dulu "ngebrik' di 100 meter (cepek met) berkeinginan untuk "naek" kembali, termasuk Dono (Radio Abenk). Keinginan tersebut didukung lagi dengan dengan didapatkannya warisan komponen-komponen dari eks Alm (Dadang Janda Janda Binal) yang lebih dari cukup, sehingga ditetapkan merakit pemancar AM dengan final 4x807, walaupun masih ada juga tabung-tabung trioda "kelas berat" ribuan volt. Oh yaaa dulu Dono dengan radio Abenknya menyemarakan siaran di SW, cukup eksis sehingga banyak sekali fans. Saat itu beberapa radio siaran gelap Bandar Lampung di jalur SW; radio Vodka, Karimata, Billy Jeans, Madona, Valentine dan banyak lagi, sudah lupa. Setelah era siaran selesai Dono aktif di jalur 2 meteran dan HF SSB. Oleh karena itulah Dono kangen dengan maenan jadul AM tube, lebih asik katanya. </div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhr2H02D-X7o5LdDSd30FIKBs6gXV6kd-YbjYKuKzBSVK6mc15Mi4AeoXbyikE_TEuNoZ5R-dqxnpN6_XIsUNUP5tLXCYbMXp_t2TuHDpCAhxJvJWjMUByO9n8d3V1CuNPinoXnHcueDVmz/s1040/AM+Tube+Transmitter+Abenk6.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="780" data-original-width="1040" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhr2H02D-X7o5LdDSd30FIKBs6gXV6kd-YbjYKuKzBSVK6mc15Mi4AeoXbyikE_TEuNoZ5R-dqxnpN6_XIsUNUP5tLXCYbMXp_t2TuHDpCAhxJvJWjMUByO9n8d3V1CuNPinoXnHcueDVmz/s320/AM+Tube+Transmitter+Abenk6.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">Dono bengong, puluhan tahun tidak melihat nyala filamen ha ha ha</div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgmv52WLTYdasXY1l_RMPTpgjbUJzr0MHcj9a4QMOYq5zBqblSUaGRmbuh89xKia4V99nOsczdEXeByRr_W-zaNgUVsHKnBQ0s3MNhMce-rGl2S9g6VD_khn0bvBBb71RjCg1F-BSzark7_/s1040/AM+Tube+Transmitter+Abenk5.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="780" data-original-width="1040" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgmv52WLTYdasXY1l_RMPTpgjbUJzr0MHcj9a4QMOYq5zBqblSUaGRmbuh89xKia4V99nOsczdEXeByRr_W-zaNgUVsHKnBQ0s3MNhMce-rGl2S9g6VD_khn0bvBBb71RjCg1F-BSzark7_/s320/AM+Tube+Transmitter+Abenk5.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;">Dono ikutan ngoprek walau mata udah payah </div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6TbYnux9reTEL0ElO-xe51IJn6bqV2LZdrYIgb3Xkza3r4NTI4vrwn8k4eUoxmB9qfsEYl6SmuTuOYRYOtRAAdK-xya_h3KY-bu_5aDTklSqIZOx5HB7kL2cJWSyhopfy80t5U93m9j4y/s2048/AM+Tube+Transmitter+Abenk4.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1532" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6TbYnux9reTEL0ElO-xe51IJn6bqV2LZdrYIgb3Xkza3r4NTI4vrwn8k4eUoxmB9qfsEYl6SmuTuOYRYOtRAAdK-xya_h3KY-bu_5aDTklSqIZOx5HB7kL2cJWSyhopfy80t5U93m9j4y/s320/AM+Tube+Transmitter+Abenk4.jpg" width="320" /></a></div><p style="text-align: center;">Oni Radio Kuno yang rakit, lagi testing</p><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj0hlI2BMcgmTJdVu8N4Y9tTV3PkYoLr0-9rTOzbj9vjBJP0G3dEu_K8IsyAXrX3vrbMDAIu2DFBwWsabbUHnONOYzJHyJEs1x5KTtFsJhue-x3hLuyg3OlEoGZsEWYoMbr0JcD_E3BnTMN/s2048/AM+Tube+Transmitter+Abenk3.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1532" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj0hlI2BMcgmTJdVu8N4Y9tTV3PkYoLr0-9rTOzbj9vjBJP0G3dEu_K8IsyAXrX3vrbMDAIu2DFBwWsabbUHnONOYzJHyJEs1x5KTtFsJhue-x3hLuyg3OlEoGZsEWYoMbr0JcD_E3BnTMN/s320/AM+Tube+Transmitter+Abenk3.jpg" width="320" /></a></div><p style="text-align: center;">Neon tidak ketinggalan,maklum Dono orang jadul he he</p><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZNE6M9NJC3AThU8OGTukVW6-_Gq1Q_FVBsR0lbJwL4gJT4naL2C-p_ffYiXsGVmUz3mtGZtd_1B1IyWn2QLmD5X4x1wLxZePHYgoeBh9HPY2yc-PvW_OhNZ2dtT0sQsb2RvF06JdlpBTG/s2048/AM+Tube+Transmitter+Abenk2.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1532" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZNE6M9NJC3AThU8OGTukVW6-_Gq1Q_FVBsR0lbJwL4gJT4naL2C-p_ffYiXsGVmUz3mtGZtd_1B1IyWn2QLmD5X4x1wLxZePHYgoeBh9HPY2yc-PvW_OhNZ2dtT0sQsb2RvF06JdlpBTG/s320/AM+Tube+Transmitter+Abenk2.jpg" width="320" /></a></div><p style="text-align: center;">Test pertama, TX masih perlu dikoprek, modulasi masih belum "duduk"</p><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEicRghOq0roKdHbxpAA1T3Uazn9bydeq9Tn6WpJnH8t6B0iGvfcQrxeaiVYZb1fmnIJBg3nr0m8GFHWfXZadTzMIeTR-NDMHBCBqdyks3XC1ODSsXqAAx-MMpqAykb_ikyAExjzncZpS10D/s2048/AM+Tube+Transmitter+Abenk1.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1532" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEicRghOq0roKdHbxpAA1T3Uazn9bydeq9Tn6WpJnH8t6B0iGvfcQrxeaiVYZb1fmnIJBg3nr0m8GFHWfXZadTzMIeTR-NDMHBCBqdyks3XC1ODSsXqAAx-MMpqAykb_ikyAExjzncZpS10D/s320/AM+Tube+Transmitter+Abenk1.jpg" width="320" /></a></div><br /><p></p><div style="text-align: center;"><br /></div>JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com3tag:blogger.com,1999:blog-7044351352970116390.post-40839262425515769722020-09-19T20:40:00.004-07:002020-09-30T19:00:17.018-07:00Nasib VFO Jadul<p style="text-align: center;"><br /></p><p>Selamat pagi teman-teman, semoga khabarnya sehat selalu, aamiin. Pagi ini berhubung kota Bandar Lampung hujan saya mengalihkan rencana tadinya ingin bersih-bersih halaman rumah menjadi beres-beres rongsokan elektronika. Seperti biasa yang masih bisa digunakan dikumpulkan sehingga jadi rongsokan lagi he he, numpuk lagi. Tidak sengaja saya menemukan PCB dalam plastik kecil, setelah dibuka rupanya PCB VFO yang lumayan banyak.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGwEkDI7L9s77Q8UmF3NqaP_MipvSG8CH0L7fLGtohdHPrGiT9IKlyT0uYnab6AlqqLpKeJHSdD5LnvfcT_MgUv7ZTH9kNrbJep4uXdB3aySrfYFEDygnGBM0YNTZzoaQE3HYNPhlzn6qB/s2048/pcb+vfo+jamal+.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1397" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGwEkDI7L9s77Q8UmF3NqaP_MipvSG8CH0L7fLGtohdHPrGiT9IKlyT0uYnab6AlqqLpKeJHSdD5LnvfcT_MgUv7ZTH9kNrbJep4uXdB3aySrfYFEDygnGBM0YNTZzoaQE3HYNPhlzn6qB/s320/pcb+vfo+jamal+.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: justify;"><br /></div>PCB tersebut saya rancang ketika belum banyak yang menggunakan VFO digital. Pada saat itu perminat AM juga terus meningkat sehingga perlu PCB yang ready. Seingat saya juga ada beberapa yang telah dirakit dan telah test mengunakan beban resistor 50 ohm, melihat outputnya dengan CRO dan frekuensi counter Nah ini dia walau ada beberapa komponen yang telah dicopot.<div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZ3n3nq4zFw8cszEfRezepaV43k4VcqBOizw-lC69tAx5boK7x9dWYil8mOQ6uYow3qZWtUiEau9r6gKgfd2GAe8kbssejC2zEW-vxbiHxjjELL6szzXH-qgla1yJUGtSHgjsExPEQCOIv/s2048/vfo+jamal+realisasi.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1456" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZ3n3nq4zFw8cszEfRezepaV43k4VcqBOizw-lC69tAx5boK7x9dWYil8mOQ6uYow3qZWtUiEau9r6gKgfd2GAe8kbssejC2zEW-vxbiHxjjELL6szzXH-qgla1yJUGtSHgjsExPEQCOIv/s320/vfo+jamal+realisasi.jpg" width="320" /></a></div><div><br /></div><div>Berdasarkan yang telah dirakit saya mencoba mengambarkan skemanya, waktu itu VFO dirancang dengan output 300 mW dengan beban 50 ohm. Ide dari rangkaian ini adalah meningkatkan stabilitas dan power output <a href="http://jmradiodoc.blogspot.com/2013/01/pemancar-am-80-meter-praktis.html" target="_blank">VFO sebelumnya</a>, maka bagian depan ditetapkan menggunakan FET, penguat menggunakan C829. FET yang saya gunakan 2N3819, saya pilih karena masih ori dan itu saya punya beberapa buah. Untuk rangkaian penala dapat menggunakan yang paralel tuning atau seri tuning pada skema tidak digambarkan, teman-teman bisa googling. Bagian penguat terdiri dari satu tingkat FET dan berikutnya transistor C829 dilengkapi dengan matching 50 ohm, yang saya adaptasi dari buku radio amatir Amerika.</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimhpa-kVNzWFhgUNMmO2yQvYAXTut0-usp-jNJ1mQTo8uZeqQgclW4LesNRCe2czpjEXBOKSsKM6YzX1skEYY_MwwvHbVueEdBkXvJXFMy9Is0f0kNMN8rFU4sklGAtAiDSOwz0TZ837Gl/s2048/skema+vfo+jamal.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1097" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimhpa-kVNzWFhgUNMmO2yQvYAXTut0-usp-jNJ1mQTo8uZeqQgclW4LesNRCe2czpjEXBOKSsKM6YzX1skEYY_MwwvHbVueEdBkXvJXFMy9Is0f0kNMN8rFU4sklGAtAiDSOwz0TZ837Gl/s320/skema+vfo+jamal.jpg" width="320" /></a></div><br /><div><br /></div>Skema ini telah di aplikasikan di <a href="http://jmradiodoc.blogspot.com/2013/08/pemancar-am-80-meter-edisi-bulan-puasa.html" target="_blank">pemancar </a>Bang Undur-undur, Bang Ranto dan terakhir Bang Udin Molina tetapi dengan mengubah kembali bagian depan ke konfigurasi awal dengan C829 karena sepertinya kurang kokoh untuk modulasi AM.<div><br /></div><div>Demikian cerita VFO jadul, saat ini saya lebih meringankan pekerjaan dengan menerapan DDS yang sudah jadi. Bagi teman-teman yang baru mulai atau ingin mencoba PCB VFO jadul silahkan saja gratis.</div><div><br /><div><br /><p><br /></p><p><br /></p></div></div>JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com3tag:blogger.com,1999:blog-7044351352970116390.post-4570448066982868992020-09-15T00:33:00.003-07:002020-09-15T04:06:00.694-07:00Up-grade Pemancar Tabung Sugriwo<p>Jumpa lagi setelah sekian lama absen, mudah-mudahan pada sehat, Alhamdulillah sekarang saya memilik waktu walaupun sedikit untuk menggeluti kembali hobi utak atik maenan jadul pemancar AM serta mendokumentasikan di blog ini.</p><p>Bersama teman-teman lokal Lampung khususnya kota Bandar Lampung meninginkan kembali untuk aktif kembali di dunia pengebrikan AM, maka mengajak kembali Bapak <a href="http://jmradiodoc.blogspot.com/2013/04/pemancar-am-2x6146.html" target="_blank">Sugriwo atau Walidi</a> yang kebetulan pemancarnya masih utuh hanya perlu dikoprek sedikit saja he he he. Setelah menemui Bapak Sugriwo ternyata beliau minta sekalian di tambah DDS. Kebetulan saya menyimpan DDS buatan Pak Dian Bandung yang belum sempat saya pergunakan, tetapi DDS belum dilengkapi dengan PTT. Berhubung kurang aktif di FB saya menghubungi Bang Oni Radio Kuno untuk order DDS buatan Adiba versi terbaru.</p><p>Singkat cerita, DDS saya tambahkan buffer dua tingkat kemudian saya suntikan ke driver 6V6 TX tabung (sebelumnya 6L6). Penguat pertama menggunakan transistor C1957 kemudian tingkat kedua mengunakan mosfet IRF 510. Berikut ini hasil utak atik hingga bisa terbang he he.</p><p><br /> Bersama Imam Branti Lampung Selatan direkam oleh Udin Tanjung Karang Pusat</p><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dxIeYmzsk-T4X_ZrTKNRcxP_58wGyXooUUotdLgC0QO0LNE91dlb0lmpJaHiYA5eyFVp3Fxhz83pSLgVc_REQ' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div><br /><br /><p></p><p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9b3rw3XOrc1qI3R-AZwpTp427Vv4xF78m0p2KUvREUszHKkBD8RmKOQXcsVvjRK4eQNbQVwmJ_Yg1dISsm5GygU3m-RH9Rl3TaKLOssBTzMcur3SQ7TBsWPkA4hTj26LMFETpzg_0mgLa/s2048/Buffer_DDS_1.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1532" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9b3rw3XOrc1qI3R-AZwpTp427Vv4xF78m0p2KUvREUszHKkBD8RmKOQXcsVvjRK4eQNbQVwmJ_Yg1dISsm5GygU3m-RH9Rl3TaKLOssBTzMcur3SQ7TBsWPkA4hTj26LMFETpzg_0mgLa/s320/Buffer_DDS_1.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBAO6N2C3yqwtSs7tLlgSRz5vf9RKwgIbAsu7qz7SEZvDv0TLOGqMju9c0OyYitrKy4BtwRQ5cf9X40ingoD39BA3fiZ-g33IE2mSl7cyfMWsXCI-ByPEsY44Te_oly81Jy_OrzUs9KXac/s2048/Buffer_DDS_2.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1536" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBAO6N2C3yqwtSs7tLlgSRz5vf9RKwgIbAsu7qz7SEZvDv0TLOGqMju9c0OyYitrKy4BtwRQ5cf9X40ingoD39BA3fiZ-g33IE2mSl7cyfMWsXCI-ByPEsY44Te_oly81Jy_OrzUs9KXac/s320/Buffer_DDS_2.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhlr0wUR_qloqC99cxMyHI818fcG7az8RxUKSAmDkIwR3k0oAMVwr24pbVIEcrYWusnm_GyxurBB9NnTf0TDDqiE-9YXPFAQKt-ODRNn6VJDm9LOV8VYZm_0e7Jam9Gt3IiGmQ1HuKZfzg/s2048/Buffer_DDS_3.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1536" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhlr0wUR_qloqC99cxMyHI818fcG7az8RxUKSAmDkIwR3k0oAMVwr24pbVIEcrYWusnm_GyxurBB9NnTf0TDDqiE-9YXPFAQKt-ODRNn6VJDm9LOV8VYZm_0e7Jam9Gt3IiGmQ1HuKZfzg/s320/Buffer_DDS_3.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiskMMhHD6hX9phUAWIC3N99tIMtVx_XOyu0pFIihceRR6TvPHY0R1gkyUA2oWNWJ8qqTXWO6EKizYBNyNdsQidwThnM5JHQHIQCaqabGNuiK19zH3nOXznJK2EcZgrvo3W00n9xsbuAaw3/s2048/Buffer_DDS_4.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1536" data-original-width="2048" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiskMMhHD6hX9phUAWIC3N99tIMtVx_XOyu0pFIihceRR6TvPHY0R1gkyUA2oWNWJ8qqTXWO6EKizYBNyNdsQidwThnM5JHQHIQCaqabGNuiK19zH3nOXznJK2EcZgrvo3W00n9xsbuAaw3/s320/Buffer_DDS_4.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dzH-M3MwkIFZ5CPA-KYYMKnwaWnMKeKVtSiS4BoDAxjJEOPaql1mBqR7G7ERkieBo121OME2TkVl5YBaPz4Mg' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /> <p></p>JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com3tag:blogger.com,1999:blog-7044351352970116390.post-71940677402001250212015-08-06T18:29:00.000-07:002015-08-13T01:55:28.170-07:00Pemancar AM 80 meter "Milik Sendiri"<div dir="ltr" style="text-align: left;" trbidi="on">
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Proyek ini sudah lama saya rencanakan sejak tahun 2012, mengingat sampai saat ini saya belum memiliki pemancar maka segala bentuk reapair atau pembuatan untuk orang lain dihentikan sementara. Proyek ini bahkan menjadi suatu balas dendam karena sewaktu STM sekitar tahun 1989 belum dapat merakit pemancar tabung berikut modulatornya karena masalah keuangan, maklumlah masih anak sekolahan.</div>
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Proyek dumulai awal Agustus 2015, diawali dengan mempersiapkam chasis dan menentukan tata letak komponen. Untuk chasis saya rencanakan untuk pemancar dan power supply terpisah, beruntung saya mendapatkan alumunium cukup tebal dari bekas box radio channel SSB Iconav.</div>
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Bersambung................</div>
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-63598197615585700602015-02-21T18:33:00.003-08:002015-02-25T21:44:36.552-08:00Project TX AM 80 Meter "Di Tanjakan Terakhir" <div dir="ltr" style="text-align: left;" trbidi="on">
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Hai ... sobat apa khabar?, sorry, sekarang baru bisa posting lagi dikarenakan harus menyelesaikan tesis saya. Di sela-sela kesibukan menyelesaikan tesis, saya menyempatkan merakit TX AM 80 meter untuk rekan Imex (YD4XEM), salah satu AMers Lampung yamg sangat konsisten di 80 meter, kalau dulu 100 meter he he he. Rekan Imex mengajukan syarat harus lebih besar dayanya dari TX transistor yang dia pakai sekarang dengan final low cost mosfet dan bisa "ngobrol" dengan bebek (SSB). Beliau menginginkan TX tabung yang bukan hanya sekedar "gengsi" saja tetapi harus bisa "melibas" transistor. Syarat yang pertama mudah merealisasikannya, tetapi yang kedua membutuhkan perlakuan khusus untuk osilatornya. Sayapun mengajukan syarat juga, cari lampu 6146 minimal dua batang dengan kondisi prima dan butuh biaya lebih untuk osilatornya. Tepat tanggal 1 Muharam (Oktober) 2014 project dimulai dengan pembuatan chasis.</div>
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<b>Rencana desain:</b></div>
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- Oscillator 6AQ5, 150 V teregulasi, bagian penentu frekuensi ditutup, filament 6,3 V DC teregulasi. Oscilator dipersiapkan juga dapat bekerja di 40 meter.</div>
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- Buffer un-tuned 6DK6, 150 V teregulasi, filament 6,3 V DC teregulasi.</div>
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- Driver 6V6, 200 V.</div>
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- Final 3x6146, 600 V.</div>
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<b>Realisasi Dan Ujicoba</b><br />
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Setelah merakit oscillator dan buffer langsung saya coba untuk "ngebeat" SSB di 80 meter dan 40 meter, hasilnya lumayan tidak merubah tone dalam waktu yg agak lama, demikian juga setelah driver dirakit, dengan memutar-mutar tuning driver, tone juga tidak berubah. Kesimpulannya oscillator cukup stabil, sudah lebih dari cukup untuk "ngobrol"dengan SSB. Karena lampu final sudah lama sekali tidak digunakan maka sambil "ngebeat" sekalian memanaskan, memancing elektron-elektron agar keluar he he he.</div>
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Power supply 6,3 V DC reg, 200 V dan 600 V DC un-reg</div>
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Osc 80 dan 40 meter</div>
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Sampai driver</div>
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Perakitan bagian final sekalian menguji kondisi lampu 6146 dengan memberikan eksitasi dan mengukur arus grid 1, dua lampu masih OK, satu lampu sudah tidak bisa di pakai lagi. Apa boleh buat, hanya dua batang saya rakit tidak lupa dipersiapkan untuk tiga batang. Setelah selesai saya coba dengan dummy load, maklum saya tidak punya antena he he he, mantab, bisa di load sampai 200 mA. </div>
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Keesokan harinya TX dibawa ke rumah Imex, langsung coba calling, pada kondisi matching-nya tetap diload 200 mA. Kebetulan malem itu Mirza anak bujang (YC 4 SPB) bergabung pake SSB, tidak masalah dapat berkomunikasi dengan baik. Selesailah project TX "di tanjakan terakhir" studi saya, besoknya saya berangkat ke Yogya untuk melanjutkan tesis.</div>
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Realisasi tampak bawah</div>
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Realisasi tampak atas, 2x6146</div>
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com8tag:blogger.com,1999:blog-7044351352970116390.post-25313642306954899202014-10-16T16:34:00.001-07:002014-10-16T16:41:17.321-07:00Radio PHILIPS 16AL217<div dir="ltr" style="text-align: left;" trbidi="on">
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Radio PHILIPS 16AL217 ini didapat dari Purwakarta pada bulan September 2014 kondisi no tested tentunya dengan harga "bersahabat". Saya tertarik dengan radio ini karena teringat tahun 1989 salah satu rekan ngebrik di 100 meter (zaman antena long wire) menggunakan radio ini sebagai receiver, kadang-kadang kami juga siaran</div>
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Radio PHILIPS 16AL217 ini memiliki band MW dan SW, setelah saya pasang battery ternyata hidup normal, hanya knob potensio saja yang perlu lem karena pecah. Senang sekali, radio kenangan dengan kondisi hidup normal, full original, lengkap, body mulus, hanya tulisan pada panel saja terhapus. </div>
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com2tag:blogger.com,1999:blog-7044351352970116390.post-46739904948908966732014-09-20T07:08:00.001-07:002022-07-16T16:24:27.377-07:00Radio Senator Model A-6 <div dir="ltr" style="text-align: left;" trbidi="on">
Dijual radio Senator model A-6 kodisi Baru (NOS), dua band MW 550-1500 khz, SW1 2,3-7 Mhz, sumber tegangan 6 volt. Dilengkapi led tuning, apabila menerima siaran led akan nyala. Stock terakhir ini speaker telah diganti dengan merk ACR, speaker aslinya karatan dan suaranya sember. Layak untuk koleksi atau artdeco, Rp 300.000,- + ongkos kirim, call/sms 081279150553.<br />
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-82967873936147257712014-09-07T14:45:00.001-07:002022-07-16T16:23:08.546-07:00Dijual Radio SANYO 853<div dir="ltr" style="text-align: left;" trbidi="on">
Dijual radio SANYO 853 4 Band MW, SW1, SW2, SW3 made in Japan. Kondisi nyala menerima siaran
normal, ,Kekurangan tentengan tidak mulus, selektor band kadang-kadang kresekan (perlu diulangi lagi kalau pindah band), trafo sudah diganti 220 V, yang lainnya original. Layak
untuk koleksi Rp 400.000 + ongkir, minat 081279150553. <br />
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-23816222447335360222014-09-01T20:02:00.000-07:002014-09-01T20:02:01.497-07:00Diode 1N 60<div dir="ltr" style="text-align: left;" trbidi="on">
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Pada radio-radio penerima, diode pada bagian product detector jarang sekali rusak, namun radio yang sudah tua dan tidak terawat dengan baik diode ini sering kali patah kaki-kakinya. Untuk menggantinya saat ini memang masih banyak dipasaran, namun bentuknya tidak lagi vintage.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnEVCBVyguL8Rym_L9FfPjt_WDumFLC6C6s7OVmmxwAa5_CQ49Zp1EtUI-PW0Q9j40zl1rOspbhd7pFVu7WfDwFU_yCcMUw9S_CzKhiBXVuIMJa7OhDW9MsqRciwbblt9AiKlIQIcK8OYP/s1600/1n-60.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnEVCBVyguL8Rym_L9FfPjt_WDumFLC6C6s7OVmmxwAa5_CQ49Zp1EtUI-PW0Q9j40zl1rOspbhd7pFVu7WfDwFU_yCcMUw9S_CzKhiBXVuIMJa7OhDW9MsqRciwbblt9AiKlIQIcK8OYP/s1600/1n-60.jpg" height="240" width="320" /></a></div>
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Suatu waktu saya melihat diode 1N60 vintage dengan strip warna hijau disalah satu toko. Setelah menanyakan harga yang menurut saya masih wajar, langsung saja diborong, lebih dari cukup untuk sekedar keperluan pribadi. Untuk anda yang mebutuhkan dioda 1N 60 vintage dapat menghubungi saya. </div>
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-74958725408352603752014-09-01T19:46:00.000-07:002014-09-01T19:46:01.305-07:00Transistor 2SB 178<div dir="ltr" style="text-align: left;" trbidi="on">
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Transistor 2SB 178 digunakan pada bagian penguat akhir (PA) pada radio vintage merk National, Telesonic, Tjawang dll. Pada bagian ini transistor sering rusak, termasuk kerusakan pisik patah kaki-kakinya akibat sudah tua.</div>
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Ada dua jenis transistor 2SB 178, pertama body panjang digunakan pada radio dengan tegangan kerja 9 volt, kedua body pendek digunakan untuk radio dengan tegangan kerja 6 volt. Saat ini tidak mudah untuk mendapatkan transistor ini, beruntung saya masih memiliki stock untuk keperluan sendiri. Apabila anda membutuhkan dapat menghubungi saya.</div>
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com1tag:blogger.com,1999:blog-7044351352970116390.post-85386523545953704542014-08-25T19:38:00.001-07:002014-08-25T19:38:05.932-07:00Transistor Germanium 2SA 341<div dir="ltr" style="text-align: left;" trbidi="on">
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Bagi anda kolektor atau "tukang koprek" radio vintage tentunya pernah mengalami kesulitan mengganti transistor oscillator-mixer. Saat saya "ngoprek" radio zenith dan grundig tidak mungkin mendapatkan transisor originalnya, kalaupun ada persamaannya seperti NTE 160 harus membeli di ebay. Sedikit googling saya menemukan transistor germanium 2SA 341, beruntung di salah satu toko masih ada yang jumlahnya cukup banyak. </div>
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Karena bagian osilator-mixer ini termasuk transistornya sering rusak maka saya membeli dalam jumlah cukup banyak. Saat ini transistor germanium sudah sulit dicari, maka bagi anda yang membutuhkan bisa menghubungi saya.</div>
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source: radio musseum </div>
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-11105460340798896422014-08-21T23:59:00.001-07:002022-07-16T16:29:45.982-07:00RFC 2,5 mH 500 mA<div dir="ltr" style="text-align: left;" trbidi="on">
Dijual RFC 2,5 mH 500 mA<br />
Kondisi NOS<br />
Tersedia 4 pcs<br />
Harga @ Rp 20.000,- belum termasuk ongkos kirim<br />
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-35026091115146992172014-06-03T08:47:00.000-07:002014-06-03T08:56:03.283-07:00Radio VEF 202<div dir="ltr" style="text-align: left;" trbidi="on">
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Radio VEF 202 didapat dari Depok Jawa Barat pada akhir bulan April 2014. Saya begitu tertarik dengan radio ini karena ingin memiliki radio transistor brand dari Eropa Timur atau Amerika. Dalam keadaan no tested, saya mencoba negoisasi kemudian deal walaupun saya ragu apakah parts masih dalam keadaan lengkap. Saya berfikir pasti ada parts yang unik yang merupakan ciri suatu produk brand seperti <a href="http://jmradiodoc.blogspot.com/search/label/Vintage%20Radio%20Receivers" target="_blank">GRUNDIG</a> , kalau ini tidak ada butuh waktu lama untuk "menghidupkannya". </div>
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Setelah sampai radio VEF 202 dibersihkan, saya kagum dengan kekokohan kotak plastiknya kalau tampilan seperti biasanya radio era 70-an. Penasaran, saya lanjutkan membersihkan bagian dalam, ingin tahu "mesinnya", ternyata wow ok banget full original, band selektornya seperti radio <a href="http://jmradiodoc.blogspot.com/2013/03/radio-zenith-trans-oceanic-3000.html" target="_blank">Zenit 3000-1</a> , tetapi yang berputar rangkaian penalanya.<br />
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Puas melihat-lihat, kemuadian googling, banyak sekali informasi mengenai radio VEF 202 ini. <span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%; mso-ansi-language: EN-GB; mso-bidi-language: AR-SA; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: EN-GB;">VEF
was one of the pioneers in the transistor analog radios in the Soviet Union.
Together with Latvian Radiotehnika</span><span lang="EN-US" style="font-family: "Calibri","sans-serif"; font-size: 11.0pt; line-height: 115%; mso-ansi-language: EN-US; mso-ascii-theme-font: minor-latin; mso-bidi-font-family: "Times New Roman"; mso-bidi-language: AR-SA; mso-bidi-theme-font: minor-bidi; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin;"><a href="http://latvianhistory.wordpress.com/2013/10/20/radiotehnika-the-latvian-radio-flagman/"><span lang="EN-GB" style="color: blue; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%; mso-ansi-language: EN-GB; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: EN-GB;"></span></a></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%; mso-ansi-language: EN-GB; mso-bidi-language: AR-SA; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: EN-GB;"> and Belorussian Selena radios the VEF set the
standards for Soviet radio quality (</span><span lang="EN-US">http://latvianhistory.wordpress.com/2014/02/13/the-vef-radios/).</span></div>
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<span lang="EN-US">Saya coba memberikan tegangan 9 Volt, band Long Wave hanya menangkap RRI programa 4 Yogyakarta itupun tidak selektif semua band dipenuhi siaran RRI Yogyakarta. Kesimpulannya bagian penguat antena berfungsi, lokal oscillator tidak berfungsi. </span><br />
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<span lang="EN-US">Sambil memanaskan solder saya amati solderan pada PCB, saya fikir mungkin hanya solderan saja yang kurang baik kemudian saya solder ulang transistor oscillator. Benar dugaan saya, radiopun berfungsi kembali, sayang range band radio ini unik, mungkin ini standar di Uni Soviet.</span><br />
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0tag:blogger.com,1999:blog-7044351352970116390.post-6437488858813343142014-06-02T05:14:00.000-07:002014-09-08T15:39:25.390-07:00Radio Telesonic NT-903<div dir="ltr" style="text-align: left;" trbidi="on">
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Dijual radio Telesonic NT-903 warna hijau tua kondisi nyala normal menerima siaran MW & SW1, loud speaker, antena, knob gelombang & band selektor diganti baru, knob tone home made. tidak ada tutup belakang. <span style="color: red;"><b>Sorry terjual ke Tanggerang</b></span></div>
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JM Radiohttp://www.blogger.com/profile/11902831901651470291noreply@blogger.com0