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EDIT: I shortened the leads on the BC109’s for a more snug fit and the problems seem to have evaporated. 🤷‍♂️ Powered up just fine but I’m wondering about the interaction between the pots. I was picking up some radio waves at first until I gave one of the BC109’s a push and made sure it was...

Inkscape with some YouTube tutorials is free and easier than you think. I was a Photoshop/Illustrator guy for a long time until Adobe went subscription based, and I’ve been using gIMP and Inkscape ever since.

Pretty painless build, though I went with amp jewels and modified their placement. Artwork to follow when I pick a design.

Would a lower or higher hfe 2N2222 be preferable for this?

Just enlisted my friend with a printer to build one for me.

Would it be possible to mod it by wiring in a pot for each loop?

Well, I took another look at the spot I thought I messed up, and I was able to re-flow the joints and get chorus/bypass sound again. I changed out the other TL072 and...I'm still back at square one with the low volume issue, but at least it's not completely broken like I thought!

I do have a bumble buzz PCB sitting around…

Man I appreciate your replies so much. I’ll probably put some other 2-knob PCB in the enclosure so it doesn’t go to waste. Re-painting it in a sparkle finish might be pretty sweet. A Red Llama or DOD 250 or Tone Bender perhaps. Been meaning to build all three. Just need to figure out how to get...

While pulling one TL072, a pad or two came off with it, and now I get no chorus in bypass and even lower output. Thanks so much for the help but it’s going on Reverb for $20 for someone with more repair skills than myself. I have a Caesar chorus to build anyway.

Okay. Enough fucking around. I’m changing out the TL072’s today and if that doesn’t fix it, it’s going in the trash compactor.

I tried the audio probe again, this time focusing on all the transistors. On most of them I could hear some of my clean signal very faintly. A few of them gave me nothing.

Not sure how to tell. Do I just touch it with my finger? It’s kind of hard to get to sandwiched between the two PCB’s.

I thought this was a transistor, but it's an IC. MC78L12CP According to the CS-505 schematic I think it's the last IC in the chain. There's a 1N4001 diode right next to it. https://ibb.co/GJMrQfM

Oof. I’m just about ready to throw this thing in the fucking trash. I’m pulling my hair out over it. That said, it was fun building my first probe.

While the diode was out, I plugged in and got the same low volume in bypass and no sound at all when engaged. Put in a new N4148 and I'm back to where I started. It does look like it connects to the transistor next to it though. I made an audio probe and probed around the main board and the I/O...

Always a smart move. 👍

I built one of those earlier versions from 2019, followed the PCB and had great results.