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Is that a question or a statement? Assuming it's a statement, that is odd. If in TB, the ONLY thing in the path are pins 8,9 of the relay (IC6) and the bypass relay IC5. If you hear both relays clicking, it should work.

I made it to 50 without needing readers. Now at 52, I can't cut my fingernails without them. I can't even look at a circuit board without my headband magnifier. Gettin' old sucks.

Quick readings on mine. One spot PS: 9.45v V+ side of R12: 9.08v Regulator side of R12, Vin: 8.25v Vin (same as above): 8.25v Vout: 5.0v I probed ground on the JST.

Right. Measure pins 1 and 3 of IC2. For ground, I'd probably NOT use pin2 (too easy to short out the regulator), but instead use a ground somewhere else on the board. There's 2 on the JST connector, or audio jack grounds are easy to grab. It sounds like the regulator could be bad.

Besides the 6002, this seems low to me. I'll check mine when I get home tonight. I have closely looked over your board and I can't find any mistakes. The ribbon cable is right. The diodes and Pcaps are orientated correctly (although some of the diodes are in the shadows). The resistors look...

Right. It's not tuning because the 6002 isn't working, because it doesn't have enough voltage. Probe around the junctions on this part of the circuit Specifically, check the voltages on the pins of IC7.

My ALL-DIY setup for leading music at church this morning. I guess I need to make my own DI and Bluetooth page turning pedal. I’ve seen DI kits, but not page turning pedal kits. Maybe @joulupukki can help me with that.😎

Funbox Neptune Reverb/Delay, based on Daisy Seed You can flash the Daisy to any of his 10 predefined modules, or download the software and built your own like @joulupukki did for Flick. I designed the UV for the Neptune Reverb/Delay The unique thing for ME on this build was the use of...

Well, Aion does it, and my prototype does it. Seems fine. Maybe it’s not necessary.

Yeah I did the same thing, copied L5 preamp. Take a look at the Traco tech notes, they aren’t exactly like the Aion schematic, they only suggest 1 inductor on the input, not both output legs.

The biggest problem with pcb v3, is the 3PDT footprints, I had to modify the 3PDT's for them to fit. In hindsight, I could have simply drilled out the holes to 2.5mm, like this, now they fit. If anyone wants to built this, it all seems to work and with this modification shouldn't be any...

I was checking the current because I'm using a Traco TEC 3-0923 DC-DC converter that takes 9vdc to 2 legs of +/-15vdc. It's rated for 100 mA per leg and 3W total. It's applying +/-15 v to the 4 op amps, or 30v across each. I have 1R resistors inline to measure the voltage and calculate the...

Spent an hour playing it. First impressions, it has a TON of gain between gain (first) and volume (last), not to mention boost. Anyway loads of headroom. Drives me crazy when I’m plugged into a system and the sound guy wants more gain than I have. Sounds real clean with the TLO74s. I’ve got...

I've never seen this before, but damn that's smart. I'm assuming installing resistors/diodes vertically it's to make it easier to: a) probe b) remove Anything else?

Last night I spent a couple hours measuring the frequency response of each knob/section. I am somewhat shocked, but it all works as I designed. The scope bode plots match what I designed in LT Spice. Next steps: 1) finish wiring up the footswitches 2) play it for many hours, in different...

I know nothing! Great show. My last name is Schultz, so I can identify...

Off the cuff, the opamps could take +/-18v, but I can't find a DC-DC converter that provides that. Options seem to jump from 15 to 24v, and 24v would be over the op amp limit.

Well, it's +/-15 volts, or 30 volts total across the op amps, which many EE's would say is WAY overkill. I've literally argued about this very issue on Allaboutcircuit.com. Me, an ME arguing with EE's, I'm definitely outgunned. Grace Designs is kinda the pinnacle for acoustic preamp design...

Here’s a bode plot measurement of the Q-tune buffer. Green trace from 75 hz to 10 kHz.