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Laney Cub 10 died after using bias probe??

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Lebowski:
Screen grid: V between pin 4 and pin 8 (ground) - should be a little less than your plate voltage, and that's DC.
Heater: between pin 2 and 7.
Something like 6-7 VAC.
Cheers!

Rene2097:

--- Zitat von: Rob Woodwind am 14.03.2021 01:10 ---Voltage at pin 3 was 340 v, on both power tubes, on pin #5 it was -19?? nothing on any other pins
maybe this says why its dead??

--- Ende Zitat ---

Really nothing at the other pins? You should see 330ish Volts at the screens (pin 4).

René

Rob Woodwind:
Hi  found out R2 1K fusable resistor is burned out, so have ordered a new one..hope that solves the problem, as no voltage on pins 4. I think what happened is when I used the bias probe, the tube pins were turned 1 notch, as fried R2 ;)
Will post when I replace it ..

Rob Woodwind:
OK replaced the R2 with a 1K  fusable .225W (all I could find) & now it works fine again :)

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