• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

If you smell the burning from the coupling caps

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I'm still wondering how it can be that just one resistor of a pair overheated while they were both in series.
Unless a test probe slipped sometime somewhere ;-)

Jan

yes, probe slips really really do happen, who knows? maybe that really took place...use of clip types are better...

several suggested to take voltage readings across those resistors, could it be the OP did not understand how to go about this?
 
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