Ace Tone FM-3 Fuzz Master sans boost

   Ace Tone FM-3 Fuzz Master without the boost option. From kitrae schem

Ace Tone FM-3 Fuzz Master

   Another Japanese Big Muff variant, this one has some substantial modifications. This has a footswitch to select between boost or fuzz, but you can't use both at the same time. The boost mode has it's own volume and tone pots. There are also other differences in biasing, filtering, as well as the location of the volume pot (in this circuit it is moved pre Q4) making this an interesting take on the Big Muff.

Sekova Big Muff Model 2015

   This is a rare Japanese Big Muff clone made by Shin Ei. It is a clone of a triangle Big Muff, however it has some substantial differences to the triangle Muff layout we have here on the site. The 47n caps in the clipping stages here vs the 1uf caps in the clipping stages of Mark's triangle Muff layout alone should give you a substantially different sound.

   I based this layout on Mark's classic Big Muff template, and included the series polarity protection diode (D1). This diode is not in the original pedal, and you can omit it if you want.

Electra 600D

I recently acquired an Solec DO-131 St. Dist. + O. D. (horrendous name) as a defunct unit and fixed it up. I found the sound very pleasing and versatile. Apparently this taiwanese pedal has been sold originally as Electra 600D, then as Omnifex 700D(?) and as Solec name monster among others. As topology goes, i found this rather interesting as well. Dist+/OD250 style gain stage, followed by switchable hard clipping and a Big Muff style tone stack. Loud and versatile dirt design. The tone control and clippers are easily made to suit one's taste. This is why i thought this was worth a post... Couldn't find other demos, but for Omnifex.

5-knob Compressor

Drew this one up some time ago and thought i'd post it up. It's basically Mark's layout for Keeley 4-knob style compressor with slight tweaks and more notably, an addition of mix/blend/ratio knob. As some of you already know, the basic CA3080 compressors like Ross, MXR and derivatives reverse the signal polarity and thus, the simple blend circuit additions won't work with it. So here's the Ross compressor with tons of usable mods on it. I've built a number of these already, so consider it verified.

2017/05/08 - One cap was reversed on the layout. Now fixed, but i had to redraw this completely due to lost source files. Anyway. Here's the "V2".