Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: BarnBand on March 19, 2012, 04:32:39 pm

Title: Hoffman old AC30 WITH JJ 40 20 20 20 CAN CAP
Post by: BarnBand 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.

Title: Re: Hoffman old AC30 WITH JJ 40 20 20 20 CAN CAP
Post by: BarnBand 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?

Title: Re: Hoffman old AC30 WITH JJ 40 20 20 20 CAN CAP
Post by: kagliostro 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

Title: Re: Hoffman old AC30 WITH JJ 40 20 20 20 CAN CAP
Post by: BarnBand on March 20, 2012, 11:57:55 am

Thanx for response...the tone pot value = 250 ka...the tone cap = .0047uf