Way Huge - Swollen Pickle

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Re: Way Huge - Swollen Pickle

Postby Greg » 17 Nov 2008, 04:57

FWIW - I've built the BYOC version, and assuming it's an accurate clone... it's VERY scooped, and pretty trebley and sort of transistory, metallic sounding.
The BYOC version has switchable EQ, but it still doesn't sound as good as a good Muff IMO.
Not something that appeals to me.
I wonder if it's reputation isn't built more on rarity than good tone.
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Re: Way Huge - Swollen Pickle

Postby bumblebee » 17 Nov 2008, 05:00

just listening to the demos on the website of the SP mkII I like the sound of it, I'm actually gonna buy one soon.
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Re: Way Huge - Swollen Pickle

Postby SpencerPedals » 30 Jan 2009, 01:42

Hey I'm mostly a lurker here since I am new to this (just built my first pedal, an Uglyface) but I was wondering if anyone had done a vero layout or PCB for this at all. I have a BYOC beaver so I have a regular muff sound and was looking to build this and a Dreamer for some scoopy variants. Anyway...just wondering if that existed...and hi! :)

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Re: Way Huge - Swollen Pickle

Postby Dr Tony Balls » 15 Sep 2009, 20:46

Anyone have any clue what the added small control and trimpots are on the Mark II version of this (dunlop reissue)???

My initialy thought is that they just made some of the resistors in the tone stack variable, but I could be wrong.
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Re: Way Huge - Swollen Pickle

Postby Solidhex » 16 Sep 2009, 00:15

I noticed on the diagram of the transistor array shown here: http://happybob.com/marc/circuits/WayHuge/
That each transistor has a diode from base to emitter. Wouldn't those throw the bias off if using standard value Muff resistors in the circuit?

--Brad
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Re: Way Huge - Swollen Pickle

Postby Dr Tony Balls » 16 Sep 2009, 03:06

[quote="Solidhex"] I noticed on the diagram of the transistor array shown here: http://happybob.com/marc/circuits/WayHuge/
That each transistor has a diode from base to emitter. Wouldn't those throw the bias off if using standard value Muff resistors in the circuit?

--Brad [/quote]


Are you sure you arent misreading that? I dont see diodes b/w base and emitter, but i DO see that the not-so-conventional diagram shows a big triangle in the transistor symbol that makes it look like a diode.
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Re: Way Huge - Swollen Pickle

Postby RnFR » 16 Sep 2009, 03:49

i see diodes from B to E in the array diagram. are you looking at the array diagram or the schematic?
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Re: Way Huge - Swollen Pickle

Postby Solidhex » 16 Sep 2009, 06:46

I'm talking about the diagram directly below the sentence: "The chip may be a 4-transistor array chip like an MPQ3904, which is a matched set of NPN transistors, so it could sound much like a vintage BMP..."
There's a diagram of a transistor array with 14 pins. You can see the collector, base, and emitter correspond with pins 1, 2, and 3. Each of the 4 transistors has a diode across the base and emitter. Cathode to base, anode to emitter...

-Brad
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Re: Way Huge - Swollen Pickle

Postby guiddruid » 16 Sep 2009, 13:09

those diodes are reverse biased - they will do nothing unless the base voltage drops below the emitter = protection diode, probably as the transistor arrays can end up being used in H bridge driver circuits.
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Re: Way Huge - Swollen Pickle

Postby Solidhex » 16 Sep 2009, 20:05

Ah

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Re: Way Huge - Swollen Pickle

Postby bumblebee » 17 Sep 2009, 09:50

Definitely diodes in this chip:
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Re: Way Huge - Swollen Pickle

Postby guiddruid » 17 Sep 2009, 12:52

...definitely reverse biased too. For one of those diodes to conduct, the base has to drop 0.6V below the emitter, which is connected via a resistor to gnd. Only place you could possibly get such a voltage would be on the first transistor, if you had an input signal of around 2 to 3 volts peak-to-peak. The diode would then limit the base to -0.6V, which would make no difference to the output from this stage - the transistor is already off. And you would be listening to some nasty (or possibly delightful - depends on your taste I guess) input stage clipping...

The diodes inside the transistor array do nothing in this circuit.

Scroll down the following page, until you see the diodes added to the circuit. Then think about the NPN transistor modeled as a couple of diodes with their anodes connected together. The diodes in the 4 transistor array allow you to make an hbridge for driving an inductive load, without requiring separate flyback diodes.:
http://www.dprg.org/tutorials/1998-04a/
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Re: Way Huge - Swollen Pickle

Postby disorder » 20 Sep 2009, 19:32

Does anyone know if the Mark II is still just a Muff with transistor array? I love the way it sounds and some guy used one at a show last night on bass and it sounded awesome.
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Re: Way Huge - Swollen Pickle

Postby tube-exorcist » 20 Sep 2009, 19:58

disorder wrote:Does anyone know if the Mark II is still just a Muff with transistor array?

The new one has a MPQ3904 inside.
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Re: Way Huge - Swollen Pickle

Postby joelap » 08 Oct 2009, 23:13

Gents, I Modified a black russian muff to the specs on that "muff in a pickle" schematic. I did it about a year ago and I believe I replaced the transistors to 2n5088's as well. When I was finished there was less gain than I expected and I have to have the volume control up fairly high to hit unity volume. Is this par for the course with this pedal, maybe a perceived reduction in volume due to the extreme scoop? I can also verify it sounding very mettalic and bright and transistor-y. Anyone who built can comment on output level. The gain also isn't terribly high ... But I'll admit I'm more of an amp distortion guy so I don't have much muff experience but I was expecting more gain. Thanks.

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Re: Way Huge - Swollen Pickle

Postby joelap » 10 Oct 2009, 17:20

Nevermind! Had the transistors installed backwards! Amazing what a fresh look at something you haven't touched in a while can reveal! Doh!
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Re: Way Huge - Swollen Pickle

Postby IG88 » 01 Jan 2010, 05:53

does anyone have a perfboard schematic for this kicking around anywhere? i started working on one but looking at the bottom im thinking there just may be too much going on there, then again im fresh at this. heres some guts as it seems this thread has been purged...
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Re: Way Huge - Swollen Pickle

Postby soggybag » 01 Jan 2010, 11:08

I built two of these a few years ago. It works pretty well. I forget where I ordered the chips, I just googled for them.

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

Postby bumblebee » 29 Jan 2010, 10:47

You can also use the 300P transistor array for this. That's what I'll be trying.
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Re: Way Huge - Swollen Pickle

Postby oneleg » 05 Mar 2010, 12:06

i can't see the schematic ,who have,thankyou!
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