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LED not lighting up [resolved]
LED not lighting up [resolved]
John.soriano
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John.soriano
Newbie
Posts:
4
LED not lighting up [resolved]
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
»
Paul Birkeland
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Hero Member
Posts:
19778
Re: LED not lighting up
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
John.soriano
Newbie
Posts:
4
Re: LED not lighting up
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
Paul Birkeland
Global Moderator
Hero Member
Posts:
19778
Re: LED not lighting up
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
John.soriano
Newbie
Posts:
4
Re: LED not lighting up
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!
Paul Birkeland
Global Moderator
Hero Member
Posts:
19778
Re: LED not lighting up
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
John.soriano
Newbie
Posts:
4
Re: LED not lighting up
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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