09-03-2013, 02:44 PM
Murf, when troubleshooting a nonworking radio, there are two quick checks to do first. First, with the volume control turned up, touch the center terminal of the volume control with your finger (careful, don't touch the switch terminals). You should hear a loud hum. If not, you have problem in the audio section or the power supply. Next, place a working radio next to the one you are troubleshooting, with dial set to around 1500. Set the dial of the nonworking radio to about 1000 and rock it back and forth. You should hear whistling that changes pitch as you rock the dial. If not, your local oscillator is not working. By performing these two checks, you have tested over one half of the circuitry of your radio. If the radio passes both checks, the next thing to do is, check the voltages at the tube sockets and compare them to the service information.
Steve
Steve
M R Radios C M Tubes