Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: John.soriano on June 28, 2021, 07:39:06 PM

Title: LED not lighting up [resolved]
Post by: John.soriano 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!

Title: Re: LED not lighting up
Post by: Paul Birkeland on June 30, 2021, 06:20:17 AM

Do both halves of the 12AU7 glow?  Can you post some build pics?

Title: Re: LED not lighting up
Post by: John.soriano 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

Title: Re: LED not lighting up
Post by: Paul Birkeland 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?

Title: Re: LED not lighting up
Post by: John.soriano 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!

Title: Re: LED not lighting up
Post by: Paul Birkeland 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. 

Title: Re: LED not lighting up
Post by: John.soriano 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