[jerryhawthorne]

Radiola, are you out there? Hope you have not given up! I really doubt through all the comments above that your problem is in your conversion to a PM speaker, assuming that the speaker is about the same impedance of the original. Even off would not give very low volume out. Check your voltages on the B+ line at the before and after your added resistor. Should be an easy check and report back. We need to get the volume level up. Give a try to touch a metal object to the center tap of the volume control with the volume on high. You should get a nice loud hum. If you have adequate HV this will sound loud. Then time to do a little more testing. I'm not the brightest on this but quit chasing your tail on the modification at this time. Get good gain and loud stations and if you can hear hum, then time to perhaps up a couple of filter caps.

Regards, Jerry