70's Peavey Musician 400 split waveform

[Randall]

I didn't get to lifting the diodes, because I found the .33 ohm 10 watt coming of the collector of Q11 to be open. Does this support your current theory Enzo? The closest I have on hand is a .47 ohm 5 watt, can I tack that in for a quick test?

[Jazz P Bass]

"The closest I have on hand is a .47 ohm 5 watt, can I tack that in for a quick test?"
For a test.
Yes.
In the scheme of things it will affect the bias current on that side.
But for a simple "does it work' test, go for it.

[Enzo]

yes, I agree, just for testing it is close enough.

[Randall]

Yes! It is working with the .47 ohm 5 watt sub. I have a nice clean sine all the way up to clipping, (my HP oscillator is on the hot side). Playing guitar sounds like, well a solid state Peavey, but the built in fuzz is way cool. I have a proper replacement on order, and will consider this case closed. Thanks again gents!

Odd that it had two cement resistor failures and no semi conductors damaged that I can tell.

[The Dude]

......Odd that it had two cement resistor failures and no semi conductors damaged that I can tell.

That is a bit odd. Could it be that someone had already replaced some shorted components and couldn't finish the job?

[Randall]

I don't really see any evidence of that. It all looks pretty original and untouched.