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So indeed, it most likely would be the transistor. Which also makes sense because I believe it was my first time USING that specific Germanium Transistor. At 9V, it's fine....at 27V, not so much. I have others, so I will just use those. The page you provided indeed is a great resource, I...

GT320A, which from what I can find, goes up to 12V?

I also saw somewhere some specs were posted. Do we have a definite answer as to what they are? I've always just worried about the hfe being somewhere between like 60 and 100, but I think someone had mentioned leakage as well?

Alright, So I've built this pedal multiple times. I've never had an issue like this, so I've come here to see if anyone can think why the pedal would act a particular way. Everything works as it should. Until you put it into 27V Mode. Then, if the gain is up pretty high for the 1st side...

Alright, I've checked the Caps. The only one that is NOT rated for 35V is C100- 47uf, which is rated for 25V. I've also checked the wiring for the footswitch which switches it from low to high gain and the wiring seems to be correct on it. I'll reflow the solder on those wires though, just to...

Are you speaking of the second footswitch? I'll check that too, but my brain wouldn't have thought that had anything to do with oscillating when in 27V mode since that footswitch moves things back and forth between the low gain and high gain settings, but I'll go over that as well, just to be sure.

I used a Russian GT320A with hfe at around 70-75ish. It's a germanium PNP transistor, although the legs are a bit off, so you have to put the legs in a very odd, counterintuitive configuration. Maybe it has too much leakage, even though they aren't known for that? As for the caps, the journey...

Greetings! To be honest, I'm a bit stumped. I've built this pedal many times and never come across this problem. No sound? Yes. The fix on that was reflowing the solder on a few places. Cold Solder joints seem to be the bane of most pedal builders existence and usually one of the first...

For something like the Chop Shop, or any pedal for that matter, what should the potentiometers on the front side be set to anything in particular? Like should the sag control be all the way up?

I did see the thread pertaining to the capacitors being double the voltage. I happen to have 10v and 16v. If I am to get 25v I’d have to make and order and I’m trying to avoid that.

In the BOM list with the instructions with said Chop Shop, it says nothing about the Electrolytic Capacitors needing to be 25V, however on the screening on the PCB, it does say this. Can I get a clarification as to whether this is actually needed or if this has started to be the norm for...

In the build document there is a 3nf capacitor listed. On the circuit, it’s silkscreened as a 3nf box capacitor. I have both 2.7 and 3.3 and have not found a right on the dot 3nf. Is it some other kind or is there an alternative, or will either of the ones I have do and make any difference in...

Alright, so. I understand the concept of biasing the JFETs and why it's done. I also understand that there are some circuits that have had trimmer pots added so that they can indeed be biased correctly. 3 Questions--> First is, with your multimeter, what setting are you putting it to and where...

I find all the way to the right almost cuts out some noise from the circuit. So that would be position 8? I mean I figured it had something to do with the bass response but they all react differently to everything else there is to tweak. Kinda crazy.

Can someone tell me exactly what this is doing for the circuit? There are some settings that are noisier than others and obviously changes the tone, but I wanted to have a better understanding of it. Thanks in advance!

That’s what I needed. A reference for the board itself. I have a tester so it’s just a matter of knowing where the legs go on the board in the first place. Thank you!

So by the look of the board it’s looking for a TO-92 style transistor (from what I can tell) but the only 2N1711’s I found are TO-39. Are there any charts for where the legs should be? I’ve had to reverse legs before depending on the pinout. Ideas/thoughts? Thanks

The momentary switch says SPDT On/On. Is it supposed to be Off/On?

Do you think it would bring the volume up past unity or because this is an old schematic/design it will always be a bit quieter? I mean would you say you could use a different pot value/type and get different results?

With the pedal PCB daughter boards for the switches. Maybe I’ll play with the switches on and off independently a bit more and I’ll be able to narrow it down as to which side is the issue.