LED not lighting up [resolved]

John.soriano · 1181

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Offline John.soriano

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on: June 28, 2021, 07:39:06 PM
The red LED that's attached to A8 isnt lighting up

My Voltages are as follows,

1. 152
2. 170
3. 0
4. 170
5. 81
6. 0
7. 151
8. 0
9. 105
10. 0

Please help, thanks!
« Last Edit: July 11, 2021, 02:27:46 PM by Paul Birkeland »


Offline Paul Birkeland

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Reply #1 on: June 30, 2021, 06:20:17 AM
Do both halves of the 12AU7 glow?  Can you post some build pics?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline John.soriano

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Reply #2 on: June 30, 2021, 04:59:15 PM
I have included pictures of my build,
it looks like both halves of the 12AU7 glow, not sure how bright its supposed to glow though, i added a picture of it as well

also please excuse my beginner level soldering skills


Offline Paul Birkeland

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Reply #3 on: June 30, 2021, 05:43:13 PM
You'll want to trim the twisted leads on those 3K resistors for sure.

If you measure the DC voltage carefully at A8, is it 0V or about 12V?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline John.soriano

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Reply #4 on: July 01, 2021, 10:05:44 PM
Trimming the twisted leads has done the trick and both LED's are now lighting up, i feel silly now. appreciate your help!


Offline Paul Birkeland

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Reply #5 on: July 02, 2021, 05:28:33 AM
That shouldn't have fixed the issue, but if you have a loose connection somewhere that may have temporarily made things work properly. 

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline John.soriano

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Reply #6 on: July 11, 2021, 02:26:00 PM
I did find a connection that i forgot to solder, now working perfectly, thanks for your help Paul


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