Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: phsyconoodler on November 15, 2011, 05:37:55 pm

Title: power dampening
Post by: phsyconoodler on November 15, 2011, 05:37:55 pm

I did a power dampening mod on an amp a few years ago but I can't remember how I did it.(old age setting in)
  I think I just out a 50k pot between the PI cathode resistor and the tube.
 I liked the effect on the amp for lowering the volume.It did alter the tone but I never used it for really low volumes,just a throttle sort of on stage.
  Anyone have any info on this? Memory and my crashed hard drive have failed me. :w2:

Title: Re: power dampening
Post by: sluckey on November 15, 2011, 05:45:44 pm

http://home.comcast.net/~seluckey/amps/misc/Amp_Scrapbook.pdf (http://home.comcast.net/~seluckey/amps/misc/Amp_Scrapbook.pdf)

Look at page three. Just replace the switch and resistors with a 50K pot wired as a variable resistor.

Title: Re: power dampening
Post by: phsyconoodler on November 15, 2011, 05:48:53 pm

Thanks Sluckey! You're the best!

Title: Re: power dampening
Post by: phsyconoodler on November 15, 2011, 05:59:26 pm

Next question:will it work on a cathodyne PI ? I'm thinking it should.But.....

Title: Re: power dampening
Post by: Lizard King on November 17, 2011, 07:44:38 am

I'm going to try this on my bassman 50

Title: Re: power dampening
Post by: kagliostro on November 18, 2011, 06:51:42 am

Quote

will it work on a cathodyne PI ? I'm thinking it should.But.....

It will work, don't know if the result tone will be of your taste (that is a personal question), but it will work

Kagliostro