2205 combo rebuild

sdmf70 · Post by **sdmf70** » Mon Nov 27, 2006 5:28 pm

I have a 2205 800 split channel combo. Somebody tried to make this amp
point to point and ripped out the mainboard! What can I do to get this amp
back to or close to stock? You would not believe the mess inside this amp!

Any help would be great. Thanks guys!

jngreene79 · Post by **jngreene79** » Mon Nov 27, 2006 8:46 pm

You could make it point to point, but it wouldn't be exactly like it was. It would be a real pain in the ass Ditch the diode clipping and you can have two separate channels - one JCM 800 and the other - a clean channel with separate eq (off the plate) via one tube. You'd have to design the board and relay switching scheme. I just did something similar - a hot rodded 800 with a clean channel (same eq, though).
Here's the original schematic http://www.drtube.com/schematics/marshall/2205prem.gif
Use the clean channel from this amp (the bottom channel)
http://www.schematicheaven.com/bargainb ... v_st-6.pdf

Hope that helps some... James