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Re: 2 Knob Bender
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 5/11/2000 1:37 AM |
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Steve Daniels (Small Bear Electronics) |
Re: 2 Knob Bender I scan it now, thanx. I have always thought of this configuration as a Fuzz "output" in, e.g., the Maestro FZ-1/1A. Did not realize that it could be input stage as well. |
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| 5/10/2000 9:01 PM |
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| aron |
OK, so I will describe the circuit here. I have all 3 schematics in sight. All circuits described as NPN. (Original is PNP, instructions are included on how to change from NPN to PNP) Can anyone help me with C2, R6 and VR2 on the supa fuzz2 (last one). Vox Tone Bender Mrk II Pro (Basic Fuzz Face circuit with an input transistor in front) Originally PNP. Original transistors Mullard OC81D germanium. C1 - Input cap 5uF postive side to transistor base R1 - 100K base to ground R2 - 10K bias from 9V on first transistor collector C2 - .1uF coupling cap from 1st trans to 2nd R3 - 100K biasing resistor from -V to 2nd transistor collector R4 - 470 ohm from 9V to R5 R5 - 8.2K from R4 to collector of 3rd transistor (out signal is tapped from the junction of R4 and R5) R6 - 100K from emitter of 3rd trans to base of 2nd transistor. VR1 - Drive pot, 1K from junction of R6 and 3rd transistors emitter to ground. Wiper connects to C4 which goes to ground. C4 is 5uF and goes from the wiper of VR1 to ground. Positive side to wiper of VR1. C5 is the output cap which is .01uF to a VR2 which is a volume pot. VR2 is a 100K pot - standard wiring. That's it! Also, there's the typical 50uF from V+to ground for power supply filtering. What I have described is NPN. To make it PNP, make +9V GROUND. Reverse the polarities of the 2 electrolytic caps. Reverse the Battery polarity. What was ground is now +9V The original circuit was PNP - sorry I see almost everything as NPN! ---------- Marshall Supa Fuzz Germanium (Originally PNP, germanium) NPN Version C1 - Input cap 1uF postive side to transistor base R1 - 100K base to ground R2 - 41K bias from 9V on first transistor collector C2 - .1uF coupling cap from 1st trans to 2nd R3 - 41K biasing resistor from 9V to 2nd transistor collector R4 - 410 ohm from 9V to R5 R5 - 8.2K from R4 to collector of 3rd transistor (out signal is tapped from the junction of R4 and R5) R6 - 100K from emitter of 3rd trans to base of 2nd transistor. VR1 - Drive pot, 1K linear from junction of R6 and 3rd transistors emitter to ground. Wiper connects to C4 which goes to ground. C4 is ??? uF and goes from the wiper of VR1 to ground. Positive side to wiper of VR1. C5 is the output cap which is .01uF to a VR2 which is a volume pot. VR2 is a 470K log pot - standard wiring. What I have described is NPN. To make it PNP, make +9V GROUND. Reverse the polarities of the 2 electrolytic caps. Reverse the Battery polarity. What was ground is now +9V The original circuit was PNP - sorry I see almost everything as NPN! ------------------ Marshall Supa Fuzz 2 http://www.muzickicentar.co.yu/seme/effects/boostdist/supafuzz.jpg NPN Version C1 - Input cap 10uF postive side to transistor base R1 - 10K base to ground R2 - 10K bias from 9V on first transistor collector C2 - ??uF coupling cap from 1st trans to 2nd R3 - 47K biasing resistor from 9V to 2nd transistor collector R4 - 470 ohm from 9V to R5 R5 - 8.2K from R4 to collector of 3rd transistor (out signal is tapped from the junction of R4 and R5) R6 - 100K???? from emitter of 3rd trans to base of 2nd transistor. VR1 - Drive pot, 1K linear from junction of R6 and 3rd transistors emitter to ground. Wiper connects to C4 which goes to ground. C4 is 10 uF and goes from the wiper of VR1 to ground. Positive side to wiper of VR1. C5 is the output cap which is 10uF to a VR2 which is a volume pot. VR2 is a ??K log pot - standard wiring. What I have described is NPN. To make it PNP, make +9V GROUND. Reverse the polarities of the 2 electrolytic caps. Reverse the Battery polarity. What was ground is now +9V The original circuit was PNP - sorry I see almost everything as NPN! |
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| 5/10/2000 9:03 PM |
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| aron |
Re: 2 Knob Bender - PARTS LIST ABOVE for 3 circuits sorry, check the parent of this message. |
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| 5/10/2000 9:08 PM |
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| R.G. | Re: 2 Knob Bender and Omni-Face All three versions, plus a batch of others, can be built on the "Omni-Face" PCB I never released. I counted fifteen variations and twenty pages of text and illustrations before I gave up on ever being able to tell people how to build it. Some things are too flexible to actually use. R.G. |
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| 5/10/2000 8:28 PM |
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| Tobias Karlsson |
Re: 2 Knob Bender
I’m in love with germaniums and use the regulary, maybe because I’ve used tube distortion for a long time so I’m a bit tired of that for the moment. Fuzz boxes are more “alive” and harder to play, it makes it fun! I definitely prefer germaniums to silicon in standard fuzzes (so far!). First time I plugged in a Fuzz Face I was paralized. Didn’t know how to handle the sound as I couldn’t play it like the 80’s tube distortion sound (ala Mesa)I was used to! Best Regards Tobias Karlsson | |
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| 5/11/2000 7:39 AM |
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| aron |
>Fuzz boxes are more “alive” and harder to play, it makes it fun! I definitely prefer germaniums to silicon in standard fuzzes (so far!). Interesting! I will have to try and fool around with it more. It's hard to get used to the reduced frequency response and slightly "blatty" sound. Not only that but sometimes there's the slight gating effect that happens (sometimes). Yeah, that's how I feel .... paralyzed. Tobias, Did you have a chance to listen to my mp3 of the tone bender? Does it sound like yours? Of course I used a Red Box... but.... |
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| 5/11/2000 11:46 AM |
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| Ivan | Aron, You described the components values of VOX tone bender MRK II pro. Is the COLOR SOUND tobe bender MRK II different? Do you have components values for that box? Thanks, Ivan |
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