Hi All, The original implementation of Capt. Lee’s Product Detector for the R-390A, 1: bypassed the noise limiter, 2: used a modified front panel BFO on/off switch to switch the audio, and 3: did not update the AGC for good and easy SSB reception. This document is focusing on fixing 2 and 3. It describes how to install and use the mini relay (found by Jacques Fortin) to switch the audio for Capt. Lee’s Product Detector. This solution is a lot easier to install than altering the front panel BFO on/off switch and since the mod is all contained in the IF deck, it makes substituting IF modules very easy. Here's a link to it:
Improving Lee Prod Det and SSB AGC.pdf (r-390a.net) <https://www.r-390a.net/Improving%20Lee%20Prod%20Det%20and%20SSB%20AGC.pdf> There's also a link to it inthe 'repair tutorials' section of the 'references' page on our website. Regards, Larry ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
