Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => PC Express and JSchem - Schematics and Layout diagrams => Topic started by: tubenit on January 13, 2016, 12:39:15 pm

Title: JK amp
Post by: tubenit on January 13, 2016, 12:39:15 pm

This is a unverified schematic of a Jim Kelly amp and it may contain errors.  I tried to redraw it into SCH from two sources:

http://el34world.com/charts/Schematics/files/_Miscellaneous/jimkelly_facs.pdf (http://el34world.com/charts/Schematics/files/_Miscellaneous/jimkelly_facs.pdf)

I do not plan to build this amp.  However, I thought it had an interesting topology to it considering 4 gain stages into a concertina phase invertor and running 6V6's at such high voltages.  The James tone stack after the second gain stage is also interesting.  I would think getting the layout "right" on this would be very crucial to avoiding oscillation problems and such?

With respect, Tubenit

EDIT:  found a drawing on the Amp Garage for this amp also