FENDER: Tweed Champ Schematics

Fender Champ 5C1 schematic fa436337dd3e

I know these are everywhere, but humour me – this is mainly for my own reference. FENDER CHAMP-AMP,  5C1 (WIDE PANEL TWEED) Note: The Fender Champion 600 and 800 are said to use the same schematic (or at least extremely similar). Preamp: 6SJ7 pentode, grid-leak biased (no cathode resistor) Inputs: two jacks, each 75k in … Read more

INTERFAX: Harmonic Percolator (modded)

Interfax Harmonic Percolator with mods vero layout v1a 3903a08c8f20

This is a slightly modded Interfax Harmonic Percolator that I made today.  It’s an odd little circuit – it can run from clean, a bit overdriven, then into distortion, and finally to overly compressed fuzz madness.  The range of sounds are so broad, it’s almost worth setting it up as a dual pedal (which I … Read more

MSA PEDAL STEEL: Jordan Bosstone Fuzz – Nashville Variant

MSA Pedal Steel Bosstone nashville vero layout v1 47bd2be85fa4

Just a little one from the Bosstone family.  This is said to have been used in MSA Pedal Steel guitars, and it’s basically a slight variation on the Nashville Bosstone circuit. These can be a bit noisy, so really have to watch your wiring and try for quite low gain on Q1.   It can … Read more

ASTRO AMP: Astrotone Fuzz, with Analog Man Mods

ASTROTONE Fuzz 015 guitar vero layout v1 1ecb3b033fd9

Perhaps best known as the Analog Man Astrotone Fuzz now, this started life as the Sam Ash Fuzzz Boxx and the same circuit also appears in the Astro Amps Astrotone Fuzz – which is a supremely cooler name, which is maybe why it has stuck. The original has 47n caps on this input and output, … Read more

MOSRITE: Fuzzrite, Silicon Version

MOSRITE FUZZRITE silicon schematic ea8ac86fd1b6

After spending some time on the germanium Fuzzrite, time for a bit of silicon action.  It’s a bit less interesting, as there seems to be less variance to the circuit – or none?   Some differences in construction methods occurred, but that’s about it as far as I can tell.   Although I need to do a bit more … Read more