11-14-2018, 08:03 PM
Just refinished recapping - completely - a very nice model 47-1230. As good practice I'd replace one or two and verify functionality. Got down to the last two capacitors, C-309 (on Riders black Sprague .01 mfd in the attached picture) and the strange looking C-419 (two leads to one ground) Went to turn on and now get nothing but hiss from all bands. Prior to replacing these final two capacitors radio was playing excellent on all bands. So thinking one may have been bad I replaced them again - still nothing but hiss. Re- soldered the old wax ones back in - no change. What could have happened? Thus far I've cleaned all tube sockets, tried different tubes etc. No change. Switching to phono and adding an external source through the old phono input - works - plays whatever source (happens to be my iphone through a Bluetooth receiver) loud and clear with zero hum. Rotating the band switch produces "pops" through speaker and if, with the volume set to wide open you can hear some kind of broadcast - very faint - that does not change with moving the tuning capacitor. Push buttons no longer operate either, except for the phono selector one. What to look for next? It's like the radio part has been "disconnected" from the amplifier part of the radio.