Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: Happy Ghost on February 04, 2021, 05:04:17 PM

Title: Are these voltages OK on speedballed crack
Post by: Happy Ghost 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

Title: Re: Are these voltages OK on speedballed crack
Post by: Paul Birkeland 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. 

Title: Re: Are these voltages OK on speedballed crack
Post by: Happy Ghost on February 05, 2021, 06:27:29 AM

Thank you so much Paul!!  Appreciate it...

Title: Re: Are these voltages OK on speedballed crack
Post by: Happy Ghost 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?

Title: Re: Are these voltages OK on speedballed crack
Post by: Paul Birkeland on February 05, 2021, 03:11:14 PM

Yes, you can do that.