Home Forums Electronics Restoration philco 38 c325 code 121 power supply issues no conventional cord Reply To: philco 38 c325 code 121 power supply issues no conventional cord

#10544
Ed Kraushar
CVRS Member

The old air cell batteries were about 2 volts. Your tubes are all 2 volt tubes so 2 volts for the A battery would be right. The C voltage can be experimented with, it will be low, I would guess 4 volts or lower. This is usually not critical and varying the voltage while checking performance will find the right voltage.

A LM 317 based power supply could be made, one was listed on this forum as a farm Radio Power Supply.

Ed.