Re: Very odd fault with Dynatron Radiogram
I think I can say with certainty that the fault resides in the phono pre-amp stages.
Its loudness is controlled by the volume control, ie at min no noise at max very loud.
Its not mechanical because removing the pick up cartridge shell, does nothing to it.
If you ground the output where it goes into the switch, it goes away on each channel that you ground.
Selection of input switching is mechanical
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