"It Might Get Loud" Pages Tonebender?

[mac]

Anyone ever tried MPSA42's for these fuzz effects? They have pretty low Hfe and are really common out there.

I'm using them when I need low gain or high voltage. They are cheap and hfe is in the 100-150 range.

In my experience, low leakage is not preferable in Q2 and Q3 is certainly not looking to be 4.5V. You want 8+ volts at Q3.

If you want 8v at Q3, I guess +100ua can do it.
Salt and pepper to taste!

mac

[Electric Warrior]

You can go way beyond 300µA without any issues. In fact I can't make my clone sound anything like my vintage unit with low leakage transistors.

Here's some voltages I measured in the vintage unit:

Battery: -9.67V

Q1 C -9.02 B -0.03 E 0
Q2 C -0.17 B -0.08 E 0
Q3 C -8.44 B -0.17 E -0.11

[Arcane Analog]

In my experience, low leakage is not preferable in Q2 and Q3 is certainly not looking to be 4.5V. You want 8+ volts at Q3.

If you want 8v at Q3, I guess +100ua can do it.
Salt and pepper to taste!

mac

If you want it to sound like a MKII you want 8V+ at Q3. The 4.5V at Q3 in the MKII circuit is not correct - unless all of the original units had it wrong.