Way Huge - Swollen Pickle

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Re: Way Huge - Swollen Pickle

Postby oneleg » 14 Mar 2010, 15:11

???
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Re: Way Huge - Swollen Pickle

Postby sevinisthenumber » 02 May 2010, 07:04

Anyone have a PCB layout?
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Re: Way Huge - Swollen Pickle

Postby phibes » 02 May 2010, 21:24

You could redraw this.

http://www.super-freq.com/?p=7
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Re: Way Huge - Swollen Pickle

Postby ShortScaleMike » 16 Aug 2010, 14:22

Unverified as yet, but I'll be building shortly. People may find it useful though.

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Re: Way Huge - Swollen Pickle

Postby mattpas » 16 Aug 2010, 19:49

ShortScaleMike wrote:Unverified as yet, but I'll be building shortly. People may find it useful though.

Image


hey Mike. Nice job.
I think the transistors are 2N3904s in the SP.
Also, there is a 330uf filter cap.
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Re: Way Huge - Swollen Pickle

Postby ShortScaleMike » 17 Aug 2010, 13:06

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.

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Re: Way Huge - Swollen Pickle

Postby sevinisthenumber » 26 Aug 2010, 06:22

[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?
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Re: Way Huge - Swollen Pickle

Postby mictester » 26 Aug 2010, 06:46

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?


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Re: Way Huge - Swollen Pickle

Postby ShortScaleMike » 26 Aug 2010, 09:25

Not built it yet, just knocked it up when I was doing some layouts.
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Re: Way Huge - Swollen Pickle

Postby mattpas » 26 Aug 2010, 11:20

ShortScaleMike wrote:Not built it yet, just knocked it up when I was doing some layouts.


Mike,
R22 should be 15k
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Re: Way Huge - Swollen Pickle

Postby ShortScaleMike » 26 Aug 2010, 11:28

Cheers, that's a typo - clearly.Thanks.
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Re: Way Huge - Swollen Pickle

Postby Thaxt » 06 Sep 2010, 08:40

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?
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Re: Way Huge - Swollen Pickle

Postby marshmellow » 06 Sep 2010, 13:02

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.
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Re: Way Huge - Swollen Pickle

Postby SGJarrod » 07 Sep 2010, 23:34

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

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Re: Way Huge - Swollen Pickle

Postby SpencerPedals » 08 Sep 2010, 02:17

The answer you seek is in the free download of the Duncan Tonestack Calculator. Plug in the Pickle values and adjust to taste.
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Re: Way Huge - Swollen Pickle

Postby SGJarrod » 14 Sep 2010, 00:07

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..... :scratch:
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Re: Way Huge - Swollen Pickle

Postby ShortScaleMike » 14 Sep 2010, 08:19

Is R22 15K, not 15 like my typo value?
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Re: Way Huge - Swollen Pickle

Postby SGJarrod » 14 Sep 2010, 14:24

yep....I used 15k...I read the whole thread multiple times before I built it
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Re: Way Huge - Swollen Pickle

Postby ShortScaleMike » 14 Sep 2010, 21:00

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.
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Re: Way Huge - Swollen Pickle

Postby SGJarrod » 19 Sep 2010, 19:43

I went thru this with an audio probe and it seems the volume is cut or never recovers after R11, I tried some different values for R11 but no difference was audible.... Any advice....?...
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