One that I've probably overlooked a little, given its place in the early history of English fuzz pedals - which was likely inspired by the Maestro...
There was a three-transistor version prior to this called "Fuzzy" which by all accounts is a Maestro. The later versions dropped the input buffer and made the jump from 3 to 9 volts.
These are gated nasty wonders of the fuzz world.
RUSH PEP BOX - GE VERSION
The 56k resistor is sitting across the 500k volume pot, so you could just drop the pot down to 50k and lose the extra part.
RUSH PEP BOX - SI VERSION
Later versions transitioned to silicon devices and became more widely recognised in their large red WEM enclosures. Rush had originally manufactured these units for WEM, before the company reportedly parted ways with him while continuing to use his circuit design.
Note: power polarity needs to be reversed on this layout. i.e. it is a regular negative ground circuit, it's not positive ground. -V should be positive (top row). +GND is a regular ground (bottom row).
Further reading:
5 comments:
Silicon version with NPN BC107 is positive ground?
Oops - no it is not. I'll sort that out
I built the silicon one. Flipped the caps and supply to be negative ground. Really like it but it's very loud. Only need about a quarter turn on the volume. Have tried reducing the volume pot to 100k, 50k then 10k but still super loud. Is there any way to reduce the overall volume? It sounds really good btw.
Hey there - you could add a large resistor before the volume pot, not unlike a MKI
Thank you for the suggestion. I added a 1m2 before the volume pot and this has done the trick. Also switched the volume pot to 500k log for a better sweep. Need to mess round with the effect pot, tried the log pot but everything was bunched up at the end of the rotation. Have tried linear and also rev log. Linear is better but it's like the effect is on or off as you turn. Not much range on it.
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