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Bias Blackstar one 104 6l6

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Blackstar Amplification :: Other gear discussions :: All about valves (brands, tests, bias...)

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Bias Blackstar one 104 6l6 Empty Bias Blackstar one 104 6l6

Post by alexdreamworld Sat Aug 17, 2013 12:46 am

Hello,

I would like to adjust bias for my Blackstar one 104 6l6.

I measured the original a very cold bias on the power tubes.

(26 Ma, 32 Ma, 27 Ma, 30 Ma on 4 tubes supposedly appaired)

So on the pcb card is two adjustable resistors:

My question is this PR1 that must be addressed and not touching the other variable resistor?

The adjustable resistors are not next to each other.

alexdreamworld

Posts : 1
Join date : 2013-08-17

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Bias Blackstar one 104 6l6 Empty Re: Bias Blackstar one 104 6l6

Post by johnd5412 Tue Jan 14, 2014 6:14 am

Did you ever figure this procedure out and if so can you share it with me as I have the same model.

johnd5412

Posts : 1
Join date : 2014-01-14

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Blackstar Amplification :: Other gear discussions :: All about valves (brands, tests, bias...)

 
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