Had voltage for a short while, then nothing

tsuid1 · 1027

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Offline tsuid1

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on: January 22, 2020, 02:57:50 PM
Just finished building the crack. I checked the resistance before plugging the amp in and all readings matched the manual's. I inserted the tubes and plugged in the amp.

The 12u7 tube glows, but the 6080 tube doesn't. The LED's glowed for a short while, but stopped after 2 minutes.

I measured the voltage on the 9 socket and got voltage higher than listed. There was no voltage for the 8 socket. Now when I measure either tube socket, I don't get any voltage at all.

The fuse is still fine, and the 8 tube socket is in the correct orientation. Is there any way to fix this?



Offline Paul Birkeland

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Reply #1 on: January 22, 2020, 06:41:22 PM
Recheck the resistances.  If it's convenient, you can post photos. 

Do the tubes not glow now? 

What AC voltage do you get between L and N on the IEC power entry module?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man