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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.

Here is a similar representation using LT spice:

An update, I finally bought a good AWG (arbitrary waveform generator). This AWG and scope combo allows me to create bode plots very easily - the scope tells the AWG what to do via USB (freq range sweep, amplitude, etc). This literally took me 10 minutes to setup and I'm a rookie at this stuff...

Great thread. After years and years of gear-tone chasing, I finally figured out that I "just like to build stuff". And if it can be useful to my music, so be it. If not, as long as it's fun and challenging, it's a win for me. I've got a whole shelf of pedals that I have built that I will never use.

Here's another comparison with Canvas included. Something odd happens with Canvas on some notes, it's a small error but considering that the other 4 tuners are rock solid together on a waveform generator, it is strange.

I did some tuner comparisons a while back, comparing Q-tune, Peterson, Turbo Tuner and Polytune 3. https://forum.pedalpcb.com/threads/comparison-of-tuners-and-q-tune.26108/

This link doesn't work. Maybe:

Deluxe version:

Killer!

@joulupukki and I have been talking about this, it seems possible via the SD card on the back of the screen. No promises (because he does the programming), but honestly he's a wizard with programming so we'll see... But I did check and it does fit in both enclosures. (1590b shown)

(125b shown)

We ordered only a small batch of Tayda enclosures initially; we wanted to test the waters and get feedback from the first few customers. And great feedback was given, THANK YOU! For the 2nd batch we tweaked a few dimensions and added the input/output and polarity icons to the graphic. While...

I like how you’ve standardized with the big jewel LEDs.

Nice and colorful. How about a play-by-play description on each of those?

Tayda has best prices at $3.50 Amplified Parts has them for $8.50. LoveMySwitches also has them but is currently out of stock.