Hi Tom, I believe that Jacques is totally right about a short in a filament line (including the 25.2 vac) that caused your fuse to blow. Another possibility is that one of the 26Z5's went and now you may have low B+ voltage. That can cause distorted audio, also.
Regards, Larry On Tue, Apr 9, 2024 at 5:46 PM Jacques Fortin <[email protected]> wrote: > Hi Tom, > > My guess is that V601B filament gave up. > So you have the 1st audio stage working, most probably, but the cathode > follower stage that follows is inactive. > Quick fix: change V601 and check if the audio returns to normal. > > If not, more investigation in the AF chassis is due. > That could be also the V602 that developed a gas leak.... > Let us know what you found, anyways. > > 73, Jacques, VE2JFE in Montreal > ______________________________________________________________ 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
