Last time I did a Sunn Model T layout it was a super blood moon (Coda Doom machine) - today is the winter solstice, so I thought why not stick with the theme and do another Sunn layout. This time it's the Guitar PCB version, which is pretty similar to the Sunn Model T amp schematic.
I left the booster from the Coda on the board, as I think it's worth having a bit of extra level on tap. It is neatly contained on the bottom right corner, you can easily leave it off, or change to a boost of your choice.
The Guitar PCB version has pin 1 of both gains pots going to a 100k resistor and a 270pf cap in parallel to ground. This is not present on the amp, and can also be left off if you prefer - just wire both gain pin 1 directly to ground, as would be done with a volume control.
As always - make sure you have proper JFETS, or it will be disappointing. Higher voltages worth a try (watch your electrolytic cap voltages).
SUNN MODEL T PREAMP - GUITAR PCB VERSION WITH BOOST
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