Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: ListerHayes on January 23, 2020, 02:19:10 pm

Title: Fender Pro Junior Choke
Post by: ListerHayes on January 23, 2020, 02:19:10 pm

First off, thanks again for all the help on getting my amp squared away.

Next up, I just put in MM Output and Power transformers and have a MM choke that I'd like to add.  I've never installed a choke before, so where would be the best place to wire it in?

Title: Re: Fender Pro Junior Choke
Post by: jjasilli on January 23, 2020, 02:34:01 pm

There is only 1 place for the typical guitar amp: after the plate supply & before the screen supply.  That's where R32 is.  You can then dispense with R32; reduce its value; or maybe increase the value of the screen resistors R24 & R25.


Or do you mean where physically in terms of layout?

Title: Re: Fender Pro Junior Choke
Post by: ListerHayes on January 23, 2020, 03:04:48 pm

Quote from: jjasilli on January 23, 2020, 02:34:01 pm

There is only 1 place for the typical guitar amp: after the plate supply & before the screen supply.  That's where R32 is.  You can then dispense with R32; reduce its value; or maybe increase the value of the screen resistors R24 & R25.


Or do you mean where physically in terms of layout?

Thank you.  That's what I needed to know.  I'll start by putting the choke in place of R32 and see how it performs...