Quote:
Originally Posted by Station X
Some radios gang the OFF/ON switch with the tone control.
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Which in many cases still means there is mains-voltage AC and slow-level-audio wiring in close proximity so the opportunity for hum is still there.
(the combining tone-control and on/off does however reduce the wear on the low-level part of the volume-control pot and hence the usual 'scratchiness').
I've seen at least one radio where the on/off was combined with the wavechange switch - meaning hum-modulation of the local-oscillator!