Quote:
Originally Posted by Olorin67
... if the speaker wires got shorted somewhere.
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I've heard that the bigger problem was if the speaker was disconnected. These radios used an output autoformer to drive the speaker, and like tube amps, no load conditions would allow excessive voltage spikes to happen. Which could take out the transistor. This radio has a shorting switch that is asserted when there is no connector on the speaker output terminal.