There were many companies making radios in the 1920's. Most radios had 3 large dials on front, used 201A tubes and ran on batteries. You may have one of these?
If so, you will need 5 volts for filaments. (They would have used a 6 volt car battery.) Also needed is 90 & 22 1/2 volt B battery. Some used a 4 1/2 volt C battery. Check schematics here on nostalgiaair. Steward Warner 300 series radios are similar to many of these early radios.
Norm
:I have recieved from an aunt's estate a dusty BT Power Six radio an W H speaker. I am looking for information on the background on this unit and if it might be brought back to life?!