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I just installed a rebuild kit for a Peterson 4 pin preamp. My boss would like the vibrato to be slower than it is at the slowest setting. Is there a resistor or capacitor I can change to do this?

I just dropped the new transistors in exactly like the old transistors. Preamp worked fine.

My concern is that the pinout of the transistor may have changed since the time of that old schematic. If the pinout hasn't changed over the years then I should be able to just drop the new ones in.
I say this because a  Vintage Vibe  Rhodes power amp I upgraded a few years back said the pinout on the new transistors were different.

I've installed the Avion recapping kit. It also includes 2n3391a transistors, but no instructions. Can someone tell me if I can just drop them in or has the pinout changed since those olden days?