![]() Sola Sound LTD - Tonebender MKI / Hornby Skewes.Iggy and the Stooges - Live in Detroit 2003.My Original Danelectro Cool Cat Transparent Overdr.Generally, the PNP transistor can replace NPN transistors in most electronic circuits. Fred Briggs - Psychedelia Fuzz / Overdrive So for the circuit above: Ic Ie Ib as current must leave the Base.Sola Sound / Vox - Tone Bender 3 Knob (MKIII) / Fu.Nine Volt Nirvana - Fuzz Pedals and Boosters.Vintage Treble/Bass Boosters - I can't find the Ge.It's an easy build, and sounds great every time! Reply Delete You can't ever engage both fuzzes at the same time! If "B" is selected and you tread on "A", it changes over. It has an insulated gate, the voltage of which determines the conductivity of the device. If "A" is selected and you tread on "A", the effect is bypassed. The metal-oxide-semiconductor field-effect transistor ( MOSFET, MOS-FET, or MOS FET) is a type of field-effect transistor (FET), most commonly fabricated by the controlled oxidation of silicon. If "A" is selected and you tread on "B" it changes over. I have redesigned my PCB a couple of times over the years, and the latest version has two complete fuzz circuits with trimmers rather than external pots, relay switching, and two momentary foot switches to select each fuzz. ![]() My favourite - and the one I make quite frequently today - uses BC550C all the way through. Each version has it's own character, but none of them sounded bad. I've even built them with transistor arrays (CA3089 - Lance's "Fuzz Chip"!). I've built them with low gain transistors (2SC828), and ultra high gain transistors (2N5088). I've built them with super low-noise transistors (ZTX384W - complete unobtaineum), I've built them with old-fashioned transistors (BC109C). It's probably the best silicon fuzz that you can make. After a couple of hours, we got the values that are in the FSB posting. There followed an evening of experimentation and resistor tweaking. The transistor bias was all over the place, with the final transistor collector "bottomed" because the base to ground resistor was dry-jointed! A few minutes with a multimeter showed the problems. We tried it into my little practice amp, and all it gave was nasty "fart" sounds and no sustain. We cleaned out the battery gunk that was inside the box (!), fitted a new battery and cleaned the pots. He remembered the "terrible" Macari's Colorsound effort in his junk box. One day - a few years later - he and I were looking for a box to build a fuzz into. He put it away in a box of junk for a few years because it sounded terrible! However, it assumes the Boolean expression is. A friend bought a silicon bender from Macari's in the late 70's. 1) The previous analysis shows how to take a Boolean expression and create a transistor-level schematic diagram.
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