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QRZ Forums - Radio Circuits, Repair & Performance for Monday 27 March 2017
Radio Circuits, Repair & Performance
/////////////////////////////////////////// Ten Tec 1210 transverter Posted: 27 Mar 2017 08:05 AM PDT http://forums.qrz.com/index.php?thre...verter.560672/ Can anyone help? Looking for component layout, need to identify rf amp, any info welcome. Dave G4PGQ /////////////////////////////////////////// diode question: okay to Replace a 1n4005 with a 1n4007? Posted: 27 Mar 2017 04:04 AM PDT http://forums.qrz.com/index.php?thre...1n4007.560622/ Hi all, Ive been working on an old Heathkit SB100 that I am attempting to return to service(not to be pretty, just to be pretty functional).Got almost all of the kinks worked out(there werent that many.. just a few bad resistors), and still dont have any ALC indication on transmit. On the RF Modulator board there are a couple of 1n4005(500V, 750MA) diodes(Heath part#57-27) that are in the ALC circuit that I am going to probably pull and test(can I test without discharging the caps or... diode question: okay to Replace a 1n4005 with a 1n4007? /////////////////////////////////////////// Kenwood TS-570D transmit/tune problem Posted: 26 Mar 2017 04:40 PM PDT http://forums.qrz.com/index.php?thre...roblem.557822/ Hi. The radio club at my local MakerSpace has a donated TS-570D. It was working fine when we first started using it. Last fall, it would sometimes "lose its tune" (SWR would suddenly jump) in mid-transmit, and in one case the unit spontaneously powered down. In fact, that was the last time it was used, around last November or so. We recently moved the entire rig, and I am in the process of getting the new system and antenna up and running. Here is a description of the current... Kenwood TS-570D transmit/tune problem |
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