Failed Voltage Check :( [resolved]

EDick · 3544

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Offline EDick

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on: August 19, 2023, 07:29:15 PM
Good evening folks!

Assembly went pretty smoothly, resistance checks were A-OK after reflowing one joint. Voltage checks went as follows:

1   -.757
2   -.64
3   0
4   -0.64
5   -.734
6   0
7   .058
8   0
9   .0113
10   0

Also, tubes were warming up but no LED lighting.

Thanks in advance!
« Last Edit: September 15, 2023, 06:32:28 AM by Paul Birkeland »


Offline Paul Birkeland

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Reply #1 on: August 20, 2023, 05:21:13 AM
What DC voltage do you have on terminal 13?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline EDick

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Reply #2 on: August 20, 2023, 07:03:44 AM
13 is reading about 12mV, then it slowly climbs


Offline Paul Birkeland

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Reply #3 on: August 20, 2023, 07:10:10 AM
Do the tubes still glow?  Can you post some build pictures?  What are the DC voltages at terminals 15 and 21?


Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline EDick

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Reply #4 on: August 20, 2023, 11:28:49 AM
Sure thing, T15 & T21 read -0.634V & currently it looks like the tubes aren’t lighting up anymore. They were fine during the initial check and the 6080 is decently warm but not hot like under normal operation.

I took some pictures but I’m working on converting them so I can add those in a bit.

Thanks!


Offline EDick

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Reply #5 on: August 29, 2023, 02:45:48 PM
Howdy, I'm back with the pics. Sorry for the wait, was traveling. Thanks!


Offline Paul Birkeland

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Reply #6 on: August 29, 2023, 03:01:48 PM
Power transformer terminal 11 red wire is not running to the correct position.  50/50 that this would cause your fuse to blow.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline EDick

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Reply #7 on: September 15, 2023, 05:41:00 AM
Lol wow, we must have totally missed that. Thanks so much, as always!


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