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It's also important to remember the value tolerance. Just because the values on the package sum to 3.9uF doesn't mean that's the actual value. It could be 3.5uF or 4.2uF.

Yes, it will pop. But... to me, it would be probably "set and don't switch until necessary" switch. I would rather not switch it while playing (especially since it's a toggle switch). But, that's me.

Yeah, I know.. but it's a bit easier to have a neat signal path/layout this way. :)

What about changing the opamp order? IC1A -> IC2A -> IC2B -> IC1B

EDB1 thread on a FSB forum.

Warning.. loud music.. heavy riffs... congrats Nathan!

I've never tested the difference with and without a diode. Looking at the Ltspice simulation, the diode makes the waveform visually similar to that of a cathode follower. Here's an example – the top waveform is a 12ax7 before and after the cathode follower. The bottom waveform is the anode and...

here is a fragment of the Bajaman LA2A limiter schematic, where 2 LEDs are connected.

I like the simplicity of the 4-knobber. Bass - for me, no more than 10 o'clock, but I think I prefer it at zero. Treble - to the max. I breadboarded CDB version, but for now I'm sticking with the original (which I did quickly in 0805).

Sigh... it works, but I made such a embarrassing mistake. I fired it up and found there was no phasing at the output. The LFO is working, and the voltages look fine. I poked around with an audio probe, and everything seemed fine, but the modulated signal wasn't reaching Q5. There was a signal at...

It'll probably be quicker and easier if you trace it yourself :). But keep trying, maybe Robert will finally show mercy. :)

It's my own work.

There's no connection to GND. Just insert switch between diode and transformer (or diode and pin 3 of the potentiometer).

Only one diode. With the switch open there's only fuzz, no octave.

Like this?

It's when you set the Tone knob at noon ;) But it's also a printing technique that simulates grafients, continuous colors/shades of gray with small dots (of various sizes).

I think I'd run the trace from the 1N5817 to the 100u and run all the supply traces from the capacitor. Something like this (red is an alternative route)

I don't remember what voltage I set. Test it in the 4-6.5V range, see how the sound character changes, and choose the setting that suits you best.

Measure the voltage on pin 1 (marked in red). It should be the same as on pin 3 (marked in green). Full CCW means minimum voltage (max sag). Bias should be set as if there was no SAG potentiometer at all (full CW).