Wee Beaver

Blooze

Blooze

Well-known member
I breadboarded this fuzz last night and ran through the usual suspects of Si transistors ending up with 2N2222 hFe~180. It's a great sounding little fuzz, but the BMP tone control sucks the ever-loving life out of it. I don't hit unity volume until the volume control is maxed out. Has anyone else built this and is that what I should be expecting? I tried throwing a SHO after it just for a boost with the fuzz volume set pretty low, but the impedance mismatch or full on gain design of the fuzz just made it squeal like crazy. Collector voltage were Q1c=7.8V, Q2c=4.6V, Q3c=4.5V if that matters. I tried putting trimmers on the bias resistors and messing with but the stock values sound best.

El Musico Loco - Wee Beaver - Schematic.png
 
I haven't built this, but, just looking at the schematic, I would reduce the tone control to 100k and Rk7 to 1k. You might also have to up C8 to 4.7nF.
 
Aleph Null said:
I haven't built this, but, just looking at the schematic, I would reduce the tone control to 100k and Rk7 to 1k. You might also have to up C8 to 4.7nF.
Click to expand...
Thanks for the suggestions. No luck. Tone went to hell with no adjustment and it raised the overall level by 1dB on the meter. I tried several emitter resistors and cap combos. Once I take the tone control below 500k the range of control drops too mich to even be useful. It definetly drops at the tone pot though. Plenty loud coming out of Q2.
 
Went back and messed with a bit more today. Going back to the original R6 of 91k and dropping R7 to 1.2K without any other changes gives me the best sound with volume boost. Moved unity from 4 ‘oclock to around 2. About 3dB improvement. Good enough.
 
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