2 Rock JM Signature amp layout

[beasleybodyshop]

Hello everyone, I posted a layout on Mark Fowlers thread regarding his version of the 2R/SSS build he did. Using some build photos and Aaron's schematic I came up with a layout.

This layout is dimensioned for F&T caps, RN65 plates/cathodes and 6PS coupling caps in a 22"X8" chassis. Mark mentioned that larger boards in a larger chassis would be the way to go.

My only real deviation was using a dumble/fender style rectifier board in lieu of the bias switch on the 2R. I like the discrete board and it can stay in the corner and not cause any excess noise.

I have checked this against the Aaron's schematic, but please take a look and let me know so i can make corrections. As always this use this layout at your own risk. I plan on starting this build here in a few months, so I can let you know how it turns out

[M Fowler]

I used 270k balance resistors under the cap board for those two 220uf caps in series.

[ampgeek]

Great stuff guys! Thank you very much for all the good work.

Quick question regarding the 1M/68K voltage divider just upstream of V4/Pin 7: Does the 68K come before or after the 1M? I have seen schematics and pictures showing it both ways. Some of the pictures (2-Rock guts and Hartman's clone IIRC) don't even include the 68K.

Thanks again!
Dave O.

[stevlech]

The 1 Meg resistor is first followed by the 68k to ground.

[ampgeek]

Thanks mate! I see now. Wonky viewing on my part!!

Cheers,
Dave O.

[beasleybodyshop]

Another change I made was to install a 250K trimmer pot in place of the 208K resistor for a reverb signal trimmer. I understand that its better to dial that in to taste.