Q2 is not conducting any current. Were Voltages measured on the resistors or directly on Q2's pins ? Verify that the Source of Q2 is connected to R9 and that the Drain is connected to R8. Did you install Q2 facing the correct direction ? Did you Ohm-check Q2 before installing ? Did you Ohm-check the bad Q2 ?

Yeah, expensive. Looking to do this on the cheap. Makes no sense to add a hundred dollar part to a 50 dollar amp.

Since you already replaced Q2, next suspects would be C7 or Q3.

Hi, Recently I was given an old peavey bandit 65 amp with issues. I replaced the old electrolytics and in the process some solder dripped across the board bridging some traces. I turned the amp on not knowing and fried the transformer as a result. I need a replacement transformer but am having a hard time finding one thats not bloody expensive. What criteria needs to be met when looking for a new transformer? Can I buy not peavey branded, generic? The part number for the fried part is 70518713.
Thanks

Thanks for the tip.

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Well I breadboarded it early this week out of curiosity. A few observations:
- 18V instead of 9 does not make much difference.
- bias is finicky, get as close to 4.5V as possible (using 2 resistors in series or a trimmer).
- while the voicing of this circuit is not exactly to my liking, it is undeniably well designed: tried other coupling caps, bypass caps and so on, and it quicky went south. Only tried stuff for about 20min, though.
- snubber caps collector-to-base -> Nope. A 2.2n cap across the last collector bias resistor worked MUCH better to tame the highs.
- somebody at DIYStompboxes suggested using other diodes. I tried BAT85 and it sounded pretty good.

I will have to revisit it at some point during summer, as it definitely has a nice vibe. Hope this helps!

Wish I could, but all my recording gear is on the other side of Europe now and I won't be able to access it until christmas at earliest    phone recordings don't do it justice, unfortunately. I might build one in a stompbox and send it to a mate to test it and record some clips during summer, we'll see...

Looks interesting. I'd love to hear some clips!