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Hello all.?
There has been one small part of the schematic that has always confused me

What role does M1? and M2 play. It looks like they are grounded yet that would not make sense. As the radio receives M1 would be shorted to M2.
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73
Dave

Those points go to the TR relay located on the left lower portion of the schematic if i remember right (am at work and can't look it up)

John

M1 M2 M3 M4 (as you show on left) are the screw hole ground pads on the PCB. Not the same as the audio nodes M1 M2 that are routed to the K3 relay.

Rgds,
Gary

Thanks,
Perfectly clear now.?
73
Dave