Hi guys, I'm doing a clone of this amp mainly due to it's unique design that MAY or MAY NOT sound good, as there is mixed opinions. I'm hoping it will sound like this..... The 6GW8 was used extensively in local built amps in the 60's and 70's here in Australia and there are plenty around, although NOS are getting very expensive. From the info on the net and the poorly drawn Marshall schematic I was able to piece together my schematic. Love reverb, so that was added. This local guy has one and put together this https://ivanrichards.com.au/2012/03/01/a-very-rare-marshall-jmp/ which was a great help to nut out the circuit board. I did deviate from the drawn layout as a few changes came to me as I was marking the board. So i'll do a redraw once I'm done.