Are these voltages OK on speedballed crack

Happy Ghost · 1119

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Offline Happy Ghost

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on: February 04, 2021, 05:04:17 PM
Hi,

Can you please let me know if the following voltages are OK on a speedballed crack (No issues with LED's lighting).

Large Board:
  OA: 110V
  OB: 112.7V
  G:   0V
  B+: 182 V
 
Small Board:
  OA: 82V
  OB:  78.6V

Am attaching a pic if it helps. OA/OB on the big board are high, right?

Thanks,
Atul

Atul

Offline Paul Birkeland

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Reply #1 on: February 05, 2021, 05:59:20 AM
Yes, those are OK.  You have a 6080 with very strong emission and a 12AU7 that's possibly not quite awake.  If the amp hasn't been run much with that tube set, give it 50-100 hours of run time and then recheck the voltages. 

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Happy Ghost

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Reply #2 on: February 05, 2021, 06:27:29 AM
Thank you so much Paul!!  Appreciate it...

Atul

Offline Happy Ghost

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Reply #3 on: February 05, 2021, 02:44:31 PM
Is it OK to leave the amp running with the headphones plugged in but no music input? Will it damage the amp in any way?

Atul

Offline Paul Birkeland

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Reply #4 on: February 05, 2021, 03:11:14 PM
Yes, you can do that. 

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

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