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Okay, im gonna put it on a breadboard. But, would a breakoutboard make a difference as to how i should be wiring this up? I only ask cause the first one I did used a 3pdt and wired it "the ole fashion way" and its the one that worked on the first try

I do have a couple Buff N Blend pcbs laying around that I could try as well but I feel like a fella earlier had mentioned oscillation issues with it? Probably worth a shot

Can I check the voltages with a Multimeter?

I am pretty sure I was running it to a pot lug. I wired a new one into the pedal but now I’m coming across the same issue. Volume all the way with the blend is at zero, kind of a mix at 50 percent and dead silent when I max the blend. I’ve also wired it both to the C23 cap and the DC jack. I’m...

Also I had just noticed the side with Return/ out/ 9+ was in the wrong slots

I actually used a 2n5457 instead on both circuits I’ve made. The first is still completely operational and the second one has been a dud so far. This is the one I just made with a Fairchild J201

I’m not sure as to what exact component was smoking but I just unplugged it as quickly as I saw it.

Update: Plugged pedal up with the circuit connected to probe and smoke started to come from the circuit. I’ve wired it up back without the blend circuit and it sounds as usual so I’m going to build a new SFB and try again. 😢

So, this the second Promethium that I have added this SFB circuit to and now the pot acts as it’s reversed and there is NO blend only acting as a level. Maybe I goofed on the circuit but I’ve checked my connections with a multimeter and everything seem okay but lug one and two on the pot are...

Before I wire this up to C23, what filter cap should I use???

And blown power supply for the circuit or for my actual isolated power supply? (Walrus Phoenix)

So if I was to wire it appropriately in this fashion, where on this circuit am I hitting? Just the VCC and VREF points?

Well as far as functionality, it seems to works seem less. No extra noise or any of that unwanted jazz

I just got done wiring this up like such and it works like a charm.

So where would the power filter be on the Promethium?

This is the exact one! Im gonna wire it up after work

I ended up making a Simple FET Blend on a trial and error run but I’m still VERY CONFUSED as to how to wire this thing lol. Anyone have some pointers?

I made a probe guys and ill never look back. My 10k resistor right off the In was bad/cold solder so i replaced and made sure to flow properly and it works like a charm

Fairchild 2n5457 from Guitar PCB