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Confirmed when I got home. Pedal works. It was a grounding fault.

Ok, but that would mean that you are soldering the turrets to something that was installed in the G10 (or whatever turret board you used) in the first place, something that can receive solder. If he's building a PCB board with huge PCB pads to receive the turrets then recommending he solder it...

It looks like he's soldering the turrets to eyelets (correct me if I'm wrong there). Typically you can make a stake press with a couple large diameter bolts. Drill one out to receive the turret and the other grind to a point to flare the turret end around the board. You would fasten the...

Also pin 5 of the NE5532 should have been Vref on the nose, but it was showing higher voltages. Grounding schemes seem like voodoo to me, so I was hoping someone could explain it. Like I said, since changing the ground wire to the same wire type as the input power, voltages settled down. I don't...

Oh, here's the power section. Pretty standard stuff, it looks like. Although C102 seems unusual, I don't recall seeing a second capacitors arranged that way before.

This may not be a troubleshooting thread at all, but its more more of a gap in my understanding. Bear with me. I hooked this up to an Auditorium and after the pedal failed to work in effects mode I put an audio probe to it and got signal pretty much from the volume pot all the way to C1. I was...

I think I'm kinda wavering here at the prospect of inserting a resistor and switch between IC pin 3 and the socket. I'm sorta wondering if it makes more sense to just build an offboard circuit for the second effects channel using a TL071. It was a suggestion on another forum and kind of a light...

There seems to be a fair amount of interest on this board for parallel mixers. I know that makes an appearance in the Wish List forum. I've asked Robert about the possibility that one will be forthcoming, but no answer. It sounds like one is in the works, but it's not soup yet. Darn. My perfect...

Me too. But he's not given any indication of what became of it. I asked.

That is slowly dawning on me, as well as the distinction between "mixing," "blending" and "panning." This project inspired me to begin building a three channel signal blender pedal (two effects, one clean, like the Old Blood Noise Signal Blender). I'm in the middle of sorting all that out still...

Plug a 1/4 jack into one of the sockets and it will all make sense. ;)

Unfortunately, I don't have a better picture. But it's actually pretty intuitive if you study the wiring diagram (page 4). As you look at the input socket you can see a contact blade spanning across to join each pair of the solder lugs. When you plug a jack in, it lifts that blade and breaks...

I've been interested in incorporating trim pots into both build and breadboard projects. The question for more experienced builders is what sort of stocks to you keep available on your workbench? What value pots would you keep onhand, and what type of trim pots do you prefer? I wanted to...

Well I guess I'll add my stupid Tayda ordering tricks to the pile. I ordered some pots that I can't finish a project without (my oversight) and I ignorantly also included a handful of painted enclosures with the order. Placed the order 12-5-21 and was notified yesterday that my order arrived at...

Yeah, I'm at work and don't recall precisely what I have. It's two 8-pin pads on top and they would go to a single 8-pin pad underneath. It looks like the Arachnid dual op amp mod requires you tie resistors between the EEPROMs. That may be asking too much of this board. PS: Looking back at my...

Someone just sent me a Dual IC to Single Conversion Board and I had no idea what I'd do with it. I'm probably a month away from starting my build on an Octagon. Hmm, this might be a good application for that.

I don't understand the question. Have you read this post and his followup posts? He used your circuit and made it work on the real pedal. https://forum.pedalpcb.com/threads/adding-a-blend-to-a-promethium-hm-2.5724/post-47886 He may be wrong, or he may be right. But you can figure it out by...

The point of breadboarding is to see if your blender still works as it should. Does it have 9v where it's supposed to, does it have half voltage where its supposed to, is the electrolytic still functioning. That is a separate issue from how to fly this circuit into the host pedal. And I think...

This is a perfect opportunity to use a breadboard. If you ran 9 volts to one of the pot lugs then the schematic is a clue to what you are possibly facing. The schematic tells the story. I barely know what I'm talking about, (and I keep hoping that more experienced builders will weigh in...

Yeah, when I built mine I didn't have a 390p ceramic cap for the Op-amp gain stage frequency response at C8. I think I used a 800p cap from a Radio Shack grab bag without giving it much thought. I've built a second one with the right value and don't really notice much difference. The Centaur is...