MI Audio Blue Boy Deluxe Overdrive
Schematic is avaiable HERE. …and by request another layout with with mods by asbestosaurus at FSB. R1 and R2 is the suggested values but they can be tinckered with for more or less overall output.
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Hornby & Skewes Selectatone T.B.2
A tweaked Rangemaster with switchable output filters. Schematic and more info HERE.
Maestro Fuzz Phazzer FP2-3 – modified
This one belongs to the category ” old, weird and forgotten”. Maestro Fuzz Phazzer was an odd piece of gear, a gnarly fuzz based on Maestro FZ-1S Super fuzz followed by an optical discrete phaser circuit….without a LFO. The sweep was controlled by a foot treadle which also acted as a volume control in … Read more
Nobels ODR-S – Special Overdrive
Another overdrive from Nobels which shares a similar topology as ODR-1. But this one appears to a have a bit more gain on tap and a more flexible eq section. The mid control is powered by a transistor gyrator while the Lo and Hi controls are Bandaxall. And the hard clipping diodes are germaniums so … Read more
Univox CO-105 Uni-Comp
A quite simple old japanese compressor by Univox. For part substitutions (since stock parts is long gone obsolete…) the transistor were a low gain NPN silicon so PN2222 or 2N3903 should work. MD234 were silicon signal diodes so 1N4148s is a near enough sub. The spec of the original vactrol remains unknown so socketing a … Read more
Royal CW-1 Cosmo Wah Machine
Now this is some crazy stuff! How about a wah / ringmodulator with vibrato tails??? The schematic is avaiable at DeadEnd Fx. Note that the Wah/Cosmo Select switch is the stock 2P6T rotary for this layout.
Royal RP-2 Fuzz Wah Machine
Another old japanese obscurity. There is a hand drawn factory schematic floating on the web but I decided to clean it up in order to build a clone. It looked like slimmed down Ibanez Standard Fuzz with a tone control. and a “Howl Adjust” control which dials in the upper octave. And built the fuzz … Read more