[Arran]

Hi all,

I just joined the site an am looking forward to learning a lot about these old Philcos. I had a 38-4 in my cellar when I was 10 years old. It worked great. Just picked up a chassis that needs recapping and a speaker. I changed the power cord and all the tubes light up and I measured the two terminals on the plug for the speaker that are closer together, ( they measure approx. 350V) Can someone tell me how to convert this to a PM speaker? Also, does anyone know the correct illumination lamp that plus into the back of the dial? Alos where to get ot would be good to know too. ((is teh elctromagnet for the speaker also called the Field Coil?) Thanks for your help with these questions. I also have a Philco portable radio that plays great but has a little hum to it. I', using the AC line because I don't think they make the batteris for it anymore.
Dennis

A filter choke is the best substitute for a field coil on a speaker, unless it's a smaller set then a wire wound resistor is good enough, there is a way to make a solid sate substitute for a filter choke if you can't find an iron one.
With regards to the portable, if it hums excessively during AC operation, assuming it is a three way portable with a built in AC power supply, then very likely the filter capacitors need to be replaced.
Regards
Arran