Way Huge - Swollen Pickle
- sevinisthenumber
- Cap Cooler
Anyone have a PCB layout?
"The man who says he knows everything will never know the truth"
C.S. Lewis
C.S. Lewis
- phibes
- Transistor Tuner
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- ShortScaleMike
- Resistor Ronker
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Unverified as yet, but I'll be building shortly. People may find it useful though.
- mattpas
- Breadboard Brother
hey Mike. Nice job.ShortScaleMike wrote:Unverified as yet, but I'll be building shortly. People may find it useful though.
I think the transistors are 2N3904s in the SP.
Also, there is a 330uf filter cap.
- ShortScaleMike
- Resistor Ronker
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Thanks for the input. I've changed the transistor type, and added the 330uF filter cap, had to do something ugly with the 3rd clipping stage however.
- sevinisthenumber
- Cap Cooler
[quote="ShortScaleMike"]Thanks for the input. I've changed the transistor type, and added the 330uF filter cap, had to do something ugly with the 3rd clipping stage however.
hows it sound?
hows it sound?
"The man who says he knows everything will never know the truth"
C.S. Lewis
C.S. Lewis
- mictester
- Old Solderhand
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Like a smooth example of a Big Muff Pi! There is no magic here!sevinisthenumber wrote:ShortScaleMike wrote:Thanks for the input. I've changed the transistor type, and added the 330uF filter cap, had to do something ugly with the 3rd clipping stage however.
hows it sound?
"Why is it humming?" "Because it doesn't know the words!"
- ShortScaleMike
- Resistor Ronker
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Not built it yet, just knocked it up when I was doing some layouts.
- ShortScaleMike
- Resistor Ronker
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Cheers, that's a typo - clearly.Thanks.
- Thaxt
- Breadboard Brother
The quad transistor array chip - 4 X 2N3904s - is available (as usual) from Steve Daniels @ Small Bear Electronics (www.smallbearelec.com)
It might prove interesting to experiment with in any circuit using multiple 2N3904s.
Is there something about using this type of T array chip that produces superior sound -- due to the fact that the chip-embedded transistors have exactly uniform specs?
It might prove interesting to experiment with in any circuit using multiple 2N3904s.
Is there something about using this type of T array chip that produces superior sound -- due to the fact that the chip-embedded transistors have exactly uniform specs?
- marshmellow
- Cap Cooler
Not in a Big Muff context. Transistor arrays are handy when you build differential amplifiers, VCAs, ...
where close matching specs and thermal coupling are necessary.
where close matching specs and thermal coupling are necessary.
I am gonna build this pedal per Mike's Vero layout and was wondering if I can put on a mid switch ala Skreddy Mayo... I know the SP is known for huge scoop but was thinking of running a DTDP with one side being the .0033uf highpass cap and the other side being two .0033uf caps in parelel for C10, I know this would not make the mids flat but would be close and make this pedal much more versitile... Anyone have thoughts or input on this? or would it just be better to run a higher cap value instead of the .0033's in parelel? Thanks
- SpencerPedals
- Solder Soldier
The answer you seek is in the free download of the Duncan Tonestack Calculator. Plug in the Pickle values and adjust to taste.
I put this thing together an I am seeming to have an issue with it... It bypasses and turns on and off fine but when it is turned on the sound level is cut to a whisper and u can hear a smooth dull muff sound.... I triple checked everything...from wiring to the board and part placement..I figured the signal was being bled to ground so I re-did all my grounds and ran a razor blade between the strips on the vero board to make sure there was no solder jumping strips..has anyone else used this layout? Help Please.....
- ShortScaleMike
- Resistor Ronker
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Is R22 15K, not 15 like my typo value?
- ShortScaleMike
- Resistor Ronker
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Well besides checking transistor orientation and that you've implemented the layout correctly, you could check it reflects the schematic correctly.
Check for the signal using an audio probe after the coupling cap on each collector.
Check for the signal using an audio probe after the coupling cap on each collector.