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Double checked C19 and C20 and R19 and R20 but they're all as they should be. Re-checked D4 & D5 and I'm still getting the same results as before: .3-.6 on D4 cathode, zeros across the other three. I'm using an AstroAI AM33D multimeter. Pin 1 on IC1 & IC2 were both totally silent when probed...

Just swapped the 1n in and no noticeable change... Argh!! Going to try @zgrav 's jump suggestion, hopefully this evening, and will report back

:oops: Oh wow, can't believe I missed that! When I went and swapped all 1u electrolytics for 1u film caps I just went on ahead and swapped that for a 1u, too. Going to swap that as soon as I have time to get to the bench again. Thanks for spotting! I would love for this to solve the problem hah...

Nice loud, nicely distorted audio on top/K of D4 but the bottom/A has barely perceptible audio when at all the way at max volume. D5 is even more quiet / essentially silent. Same results as when I first probed back when I was still using the Soviet diodes. I reflowed everything adding a little...

But if it's just a soldering issue wouldn't that mean it has to be D4 since that's where things die when testing with the audio probe? If that's the case I'm not sure that my soldering would be the problem - I've now soldered the diodes 4 times now (first sockets, then straight to the board...

I don't have any Schottkys on hand but I swapped out the Russian GEs for some proper new 1N34As and the problem is exactly the same as before.

Alright y'all, I'm back. I waited a while for some 1uF film caps to arrive (the slow Tayda shipping option has gotten really slow) and I swapped them all in for the electrolytic caps I had mistakenly used. Unfortunately, the problem remains the same as before. Pin 1 Pin 2 Pin 3 Pin 4 Pin 5...

Welp, you lost me there. I think I need to just replace these with some film caps until I better understand schematics! 😵‍💫

What's the best way to go about determining that? I'm trying to find info on this but obviously it's not an ideal swap and most discussions seem to be about using film in place of electrolytic, not vice-versa. Would it be the case that the component that follows the cap (left to right) on the...

As soon as I posted it I thought "I really need to start wiping down my boards!" hah

Yep, all of this except the bottom of R20 does have a faint signal. Going to try reflowing and see where that gets me. Edit: I reflowed that whole row with R20 and still no change. I noticed that also the top of C20 is quiet and the bottom is loud. Here's a picture of the bottom of the board:

Yeah, I double-checked +/- and even tried swapping, no difference. Seems like as long as they're opposite it works, it's just the volume was still low. I swapped in a new pair of diodes and the result is identical. I probed around some more and one thing I noticed is that IC1 pins 6 & 7 have...

Sorry for the delay - when I posted this I was hoping there was an obvious quick answer! I finally built an audio probe over the weekend and poked around a lot. Seems like it's something with the diodes. When the signal hits the "top" of D4 it's plenty loud and distorted but then the "bottom" of...

Hey guys, not sure what to make of this. I tossed together a Promethium Distortion and it's SUPER quiet. If I crank the volume pot all the way I'm at maybe 20% of line level. Everything appears to be working as expected, it's just too quiet! Any ideas on possible culprit? Here's a couple gut...

I would also like to know this for the same reason! I'm only building a single Transroom so I only need 2 but I'm not finding them anywhere but Banzai for 30EUR a pop. Anybody had any luck since this was posted?