Hi All, A drawback to the subject mod up to now (SSB mod 1 through SSB mod 3) is that there still is not enough AGC voltage developed in SSB mode (BFO on). Mod 4 improves on this situation, which improves audio quality and carrier level meter action on weaker SSB signals. Before, the audio quality was good only in the AGC FAST position. Now it is good there and in the AGC MED position. I've updated my document on our website with a lot of help from Jacques Fortin:
R390A Fix Lankford 2 diode SSB AGC.pdf (r-390a.net) <https://www.r-390a.net/R390A%20Fix%20Lankford%202%20diode%20SSB%20AGC.pdf> The update (mod 4) starts on page 4. There is a 'relay' solution and a 'mosfet' solution. 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
