Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: ncusack on May 07, 2015, 06:23:55 am

Title: James tone stack wiring
Post by: ncusack on May 07, 2015, 06:23:55 am

Hello
I'm looking at using a james tone stack in a new build and I'm looking for wiring examples. If anyone has experience with the james stack could you please share any images of your on or off board wiring layout for the stack?

Regards,

Neill

Title: Re: James tone stack wiring
Post by: VMS on May 07, 2015, 06:55:56 am

Here is one where the components are on the pots:

http://amps.zugster.net/articles/tone-stacks#Baxandall (http://amps.zugster.net/articles/tone-stacks#Baxandall)

Title: Re: James tone stack wiring
Post by: sluckey on May 07, 2015, 06:57:07 am

I just did one in an Ampeg circuit last week. I used the top layout...

Title: Re: James tone stack wiring
Post by: kagliostro on May 07, 2015, 07:29:49 am

A possible variant (the Shift pot in substitution of the 470k resistor)

(http://s8.imagestime.com/out.php/i776076_JamesToneControlwithShiftLayout.jpg)

(http://s8.imagestime.com/out.php/i776075_JamesToneControlwithShiftSchematic.jpg)

(http://www.diyitalia.eu/forum/download/file.php?id=8893&t=1)

K

Title: Re: James tone stack wiring
Post by: xm52 on May 07, 2015, 01:57:27 pm

If you would like a circuit board, there is one here: https://oshpark.com/shared_projects/3WojKgVM


It is the same circuit that Ampeg used. Cost less than $10 delivered for three boards. The .brd design file can be downloaded and run with Eagle which is a free cad program.


Designing circuit boards can be addictive at those prices.