Hi Is it common on an R390 or a R390A? It’s not anything I have seen on either radio.
Best guess: Filament windings put out a lot of current. The chassis wires are rarely rated to handle the max output of the transformer. How much current is that? The fuse will eventually blow at some power level. A military grade transformer probably can deliver all that power to the filament winding Pilot light wiring runs around on the front panel. It’s the least protected part of the radio. Having this or that “wander in” and create a short is a very real possibility. Does this ever happen in the real world? Yes indeed it does. Back in my early years fiddling around on various radios, I did it at least once. Bob > On Feb 11, 2026, at 7:36 AM, Tom via R-390 <[email protected]> wrote: > > Is it "common" for the wires to the dial lights to be fried on an R390? I've > had three in here the last few months and each one has had the wires fried. > > > > Tom > > W3TA > > ______________________________________________________________ > 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 ______________________________________________________________ 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
