03-12-2016, 09:53 AM
Could be a lot of things. Do you hear any hum if you put your ear to the speaker?
First I would check voltages on the audio tubes. You should hear noises in the speaker when you touch the voltmeter probe to the grids of the first audio or phase inverter 6J5 tubes. You should also hear noises if you touch the volume control connections with the control turned up.
If the audio stages check ok, then it might be something like an open coil or IF transformer in the radio frequency sections of the set.
First I would check voltages on the audio tubes. You should hear noises in the speaker when you touch the voltmeter probe to the grids of the first audio or phase inverter 6J5 tubes. You should also hear noises if you touch the volume control connections with the control turned up.
If the audio stages check ok, then it might be something like an open coil or IF transformer in the radio frequency sections of the set.
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