EQD Bellows

[tracer03]

Finished this last night after everyone slipped into food coma. Used the top layout, MPF102 and MPSA13 and it sounds phenomenal. Thanks for this one!

[Mulekicker]

I just got some pf5102's in the mail so I built this last night. Like most eqd dirt boxes, it's a winner. Adds a different flavor to my extensive dirt pallette. It really shines running into gated fuzzes. So many beautiful overtones and harmonics popping out all over the place. Super easy build, highly recommended.

[lborl]

The inevitable question then - does the second layout have cuts at A3 and E5? I'm still pretty ignorant about this stuff

[tracer03]

lborl wrote

The inevitable question then - does the second layout have cuts at A3 and E5? I'm still pretty ignorant about this stuff

I used the first layout and it worked perfectly, if it matters. May try to build the second layout once I get more 1590B enclosures.

[distraughtman]

I can confirm it does - I stupidly didn't make the caps transparent.
WORTH NOTING THOUGH : I forgot to add power filtering to my layout (the second one). So if you try it out (which I haven't yet, should be fine but it's not been verified yet), think of adding a 100µF electrolytic cap going from +9V to ground (don't forget its orientation). You can also add polarity protection if you feel like it (5817 as in the first layout), which I tend to omit.

[traktop]

It reminds me to one of those low parts count deviever strange-high gain transistor-arrangement schematics.
This is like a fuzzy booster, right? How does it work by itself?

[distraughtman]

Yes, it seems like the kind of distortion that can fuzz up easily with harder attack. It seems kind of farty in some demos, but awesome in others, so I guess it just needs to be used right.

On Mon, Feb 5, 2018 at 2:09 AM, traktop [via Guitar FX Layouts] <[hidden email]> wrote:

It reminds me to one of those low parts count deviever strange-high gain transistor-arrangement schematics.
This is like a fuzzy booster, right? How it works by itself?

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NAML

[distraughtman]

By the way here's an updated version of my layout, with power filtering, visible cuts etc. Hope it works !

Info I forgot to add on top : 11x6, 4 cuts, no jumps.

[punkrawkgeek]

Just built it up... 1st layout, and it sounds good! Only thing is... I get a *pop* when I engage the pedal... If I were to put a pulldown resistor in there, would it go on Gain 1 or Gain 2??? Sorry if this is a stupid question. I just wanna see if it helps it.
Thanks!

[distraughtman]

The classic solution would be to add a 1M resistor from Input to Ground. Dunno if there's another more clever fix though...

[GrooveChampion]

Supposedly optical bypass switches are supposed to fix that, if pulldown resistors dont work.

[punkrawkgeek]

Add a BIG resistor before the Gain Pot?

[punkrawkgeek]

Yeah... The resistor from input to ground didn't change a thing. It could be a faulty blue switch... Who knows? I will try subbing in a new switch later on. Nonetheless, it sounds awesome! Thanks!

[glasspak73]

What does the Ic chip do?I can't make out what the letters spell ontop the Ic chip. Is V1 a voltage regulator?

[Pivetta]

It's the microcontroller for relay bypass. V1 is the voltage regulator for the microcontroller.

[nonost]

Build it with stock transistors and resistors. I've noticed that each transistor has its own flavour. It's not going to be day and night, but it's a good a idea to try some of them and choose according to your gear and style. In my case I found that some transistors were more rounded and others more mid-scoop and focused. You can also slightly vary R4 in order to get these results.

Cheers! ;)

[Stymie13]

Here's a PTP adaptation I built of this circuit since it's so simple.  Couldn't seem to get the image orientation fixed. First it was way too big, now too small and horizontal...