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Hoffman Amps Forum image Author Topic: Hoffman old AC30 WITH JJ 40 20 20 20 CAN CAP  (Read 2314 times)

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Offline BarnBand

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Hoffman old AC30 WITH JJ 40 20 20 20 CAN CAP
« on: March 19, 2012, 04:32:39 pm »
After building my AC 30 "HOFFMAN OLD LAYOUT"...I have an extra lobe( 20 uf ) left open in the amp...I connected a wire from the 40 uF lobe...(choke entrance)...is this OK?...or...should I just leave it open?...thanks in advace...Frank.

Offline BarnBand

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Re: Hoffman old AC30 WITH JJ 40 20 20 20 CAN CAP
« Reply #1 on: March 19, 2012, 04:39:17 pm »
ALSO...can I jumper the CUT CONTROL CAP...AND MAKE THAT INTO A MASTER VOLUME WITHOUT DAMAGING ANYTHING?

Offline kagliostro

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Re: Hoffman old AC30 WITH JJ 40 20 20 20 CAN CAP
« Reply #2 on: March 19, 2012, 05:23:26 pm »
Yes, you can jump the Tone Cut Cap and have a MV

only at the moment I  don't remember if the value of the existing pot is adequate for a MV

Kagliostro
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Offline BarnBand

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Re: Hoffman old AC30 WITH JJ 40 20 20 20 CAN CAP
« Reply #3 on: March 20, 2012, 11:57:55 am »
Thanx for response...the tone pot value = 250 ka...the tone cap = .0047uf

 


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