NPN substitutions

Frequently asked question on transistors: types, substitutions, how to test, use and misuse them.
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Paul_5
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Post by Paul_5 »

Hi All - bit of a newbie to all of this, but I'm getting the bug for building (instead of circuit-bending) pedals. I've currently got a Colorsound One Knob Fuzz that's got two transistors in it (a 2N222 and a BC548 in place of BC 108 and 109) and I'm wondering about lowering the noise in the circuit (I know, it's a fuzz pedal, but I want a clean fuzz).

Does anyone have any recommendations for this - it's the Dragonfly (Andrew Carrell) circuit by the way.

Cheers, Paul
The sounds in my head don't match the sounds from my amp, I guess that's why I'm here...
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guitarmongot
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Post by guitarmongot »

In Meathead ( based on Colorsound One Knob Fuzz) I like 2N3604 (200 hfe) in Q1
and BC 182L (300 hfe) in Q2( BCE pinout).You might want to try BC 550C, also in Q2 :it´s low noise.
/cheers M
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