Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: joedonchev on January 27, 2024, 10:03:54 am

Title: Tube preamp EQ bypass switch
Post by: joedonchev on January 27, 2024, 10:03:54 am

Hi,

Can I put a switch to bypass the EQ section in the clean channel of my Preavey Rockmaster Preamp?

Here is the EQ portion:
https://drive.google.com/file/d/1gWRBaYpCtHRGhx3QswsNOcl6nc8GumQW/

Title: Re: Tube preamp EQ bypass switch
Post by: sluckey on January 27, 2024, 12:24:21 pm

Yes. May be easier to just use a SPST switch to open the ground connection though. You get pretty much the same effect.

Title: Re: Tube preamp EQ bypass switch
Post by: Bash on January 28, 2024, 01:27:55 pm

Quote from: sluckey on January 27, 2024, 12:24:21 pm

Yes. May be easier to just use a SPST switch to open the ground connection though. You get pretty much the same effect.

This works very well on my AB lite amp.
It is very simple to do (and remove if you'd want to). Makes the amp a lot louder though.