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Yeah a great subject. A quick and easy way to verify the audio amplifier circuit in a radio is to touch the center pin on the volume control, if you hear a hum or noise this verifies the audio circuit is working. Try not to touch any thing else in a tube radio as high voltages are in there. I use a screw driver that has black tape insulate the shaft exposing the tip.

Jay in the Grate Mojave Desert

[QUOTE="Jay Mojave, post: 791812, member: 45986"] Yeah a great subject. A quick and easy way to verify the audio amplifier circuit in a radio is to touch the center pin on the volume control, if you hear a hum or noise this verifies the audio circuit is working. Try not to touch any thing else in a tube radio as high voltages are in there. I use a screw driver that has black tape insulate the shaft exposing the tip. Jay in the Grate Mojave Desert [/QUOTE]

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