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Fair enough! :) (I have no cryptogram books.) Counting out the remaining glyph characters, my best guess is that the rest says: "Transistor Swapper". :cool:

Does anyone know of an available & verified PCB for the Germanium Filter. I tried Moonn Electronics, but the order I placed went unanswered for two months so I submitted for and got a refund from PayPal. I could prolly do one up in Vero/stripboard, but I prefer a prefab PCB. TIA!

I'm still trying to translate the . . .

Unfortunately, no.

Been a seller of my previous stuff on eBay for over 20 years. I currently have some NOS Russian MP20B up for sale. Been doing it so long with just trickle sales. It's a waiting game.

After completely redoing the enclosures, I've now finished a coupla Overcast Fuzz pedals. (The first go-round I had the Volume & Sustain labels backwards.) I went with @Chuck D. Bones' 0.1.1 modification of the circuit and bent the PedalPCB circuit board accordingly. I tried the original...

Did you change anything?

Stomp switch white plastic washers are perfect for inserting over an outtie DC jack (on the inside of the enclosure) to pull the outtieness back into a more reasonable extension from the enclosure. I think I used two of them. The fresh new downside to that is that it takes up more space inside...

Continuty is not a test for voltages. You want to measure the voltages at various points on the circuit to know that the supplied voltages actually are. That is a foundational troubleshooting technique. See if you can locate the power supply pins on the FV-1, CD4069, and the two TL072 ICs and...

How are the +3.3V, Vref and +9V rails?

These? AliBaba AliExpress

The pickup sim doesn't change the sound, rather it preserves the input impedance of the circuit. So when another pedal is in front of it, the guitar's volume control cleanup remains unaffected. Remember a proper fuzz circuit will cleanup a good bit when the guitar's volume is turned down. When...

Once you a solid working circuit on the breadboard, check the schematic and start futzing with different values in places to hear what happens. The 'whole circuit' will slowly start to make sense, and soon you'll be able to suss out the different sections of a schematic just by looking at it...

Sounds like you just need more time & experience. I think breadboarding, with its ease of component swapping, is an excellent path to pursuing greater understanding of more complete circuits in your case. Troubleshooting broken pedal circuits is also an excellent way to learn more. Collecting...

Challenge accepted! I'm currently building out to Overcast Fuzz boards, so I thought I'd try to adapt CB's 0.1.1 mods to one of them. Now I'm just trying to find some low Hfe NPN BJTs in my stock. All 98 of the 2N2222s I have measure higher than 160 on my Peak Atlas DCA75. UPDATE: Found a...

I'm running HumanOS v72. The memory leaks are real.

IMO, building any pedal from a PCB with a build document or even building vero/stripboard circuit projects are little more than painting by numbers. Little understanding of "electronics" is required and only needs to know bit about the various components and how to source them. So, to "expand...

It looks like these are the best options, if not a TL082; TL072H if you want a drop-in replacement at essentially the same cost. TLE2072 if you can spend about one or two dollars more per IC. It offers a worthwhile improvement in noise, slew rate, and bandwidth while remaining pin-compatible...

Ghak! I missed that entirely. I guess my reading comprehension is now fully exposed. Green indeed.

Green is certainly the easiest. Blue entails cutting a trace cuz lugs #2 & #3 are joined on the PCB.