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Title: r-390a limiter problems Post by: w5rjh on November 06, 2017, 10:10:26 PM my r-390a started acting up. the audio is very low with the limiter off and comes back to normal volume with limiter on. the caps around the limiter have been changed and new tubes have been tried. I pulled the if module out of my parts radio and it works in both positions any clues?
w5rjh sorry for posting in wrong area earlier Title: Re: r-390a limiter problems Post by: WD8KDG on November 06, 2017, 11:36:04 PM Hello Roger, AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
If you haven't so far, download a copy of the Y2K manual R3.......http://www.r-390a.net/Y2K-R3/index.htm Another great source of info; experts on the R-390/A......http://mailman.qth.net/mailman/listinfo/r-390 So what you are saying; the parts radio IF deck works in both receivers. The IF deck mentioned first has limiter issues. In the Y2K manual Chapter 5, figure 5-6 shows tube voltages & resistance. Check those first......tube extenders help!! I can think of other items, but would have to know what else has been done to the receiver. Regards, Craig |