The Amp Garage

You might be getting feedback through the wet/dry pot. Perhaps try a 250k there.

When there's a backline I just take my ethos OD.

Here you go.

Charlie, I've yet to see a picture of what treble cap is supposed to be used with the classic stack, but you might want to try adjusting that also. I've settled on a 270pf there.

After digging a little more I believe THIS is the one.

I believe this is it.

You could load this into LTSpice and see what you're hearing and hear what you're seeing.

You're probably after the classic stack as in the 1984 schematic. You can't use the TSC to simulate it though.

If you're using the heater circuit to power the relay circuit, you need to isolate the relay circuit completely from ground, including the ground return from the pedal jack.

Here's a couple of higher resolution pictures.

Thanks for this redshark. I'm wondering if you have the value of the treble cap, and does the rock/jazz switch have a center detent? A picture of the pots would be cool also.

deuce42 wrote: Cheers:)

Beer up!

It sounds like you've got your plate resistor to tube socket connections reversed on the first tube, but really, a picture is worth a thousand words.

You can use LTspice, and it does the math...

On the first page of this thread:
http://ampgarage.com/forum/viewtopic.ph ... ght=starve
There are some good ideas for a blues player :)