60s Maestro Fuzz

[Valvehead]

Any transistors available in the USA that can replace a 2n2614 ??

[x-pro]

Choos

[mozz]

Sure lots can replace it. They are a cheap leaky transistor. Which version, i guess FZ1A? If you are trying to build the best replica, use RCA transistors from the same period. Chances are you won't find 2N2614, 2613 but i do know of a piece of electronic equipment that actually uses them. I can't give my secrets away though. You can find RCA 2N404, 406,408 in the tall package which should be close.

[Valvehead]

Yes Fz1A

[35L6]

If modern transistors aren't leaky enough can you parallel them with 10M or something ?

[Mick Bailey]

I've used low-leakage Ge transistors along with additional resistors to provide a leakage characteristic. I never did a side-by-side comparison, but my builds accurately replicated that early fuzz sound. Sadly, I never documented exactly what I did, but I think I may have a tagboard prototype in my FX graveyard somewhere which I'll try to find.

[35L6]

What does the leakage contribute sonicly .

[Helmholtz]

Early Ge transistors varied considerably regarding leakage.
Some effects units actually depend on leakage to provide transistor bias.
With low leakage types leakage can be emulated by a large value resistor wired between collector and base.
To get the desired sound it is essential to use resistors that give circuit voltages close to that of a good original unit.

[SoulFetish]

Valvehead, I have some germanium PNPs I would sell u if you're interested. I don't have an exact 2N2614 (at least at a quick glance), but should have something that should work well. pm me if interested