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5mm or 3mm doesnt matter. But with the led correctly oriented, the pt2399 chip shouldnt distort at all really.

Does the led (d2) light up when the signal is clipping? Are you sure it is oriented correctly?

£369 ?! Hahaha and I feel guilty when I sell my pedals €130-140 o_O

Looks like a Red Llama with a tone control

Try a green led from pin 7 of the pt2399 to ground. It acts as a crude limiter that prevents clipping. Jon Patton invented it. It works very well in my experience!

hahaha same here :D

If I use an inline resistor I generally use 22r or 47r. Sometimes if the circuit is really noisy, 100r and a 100uf cap can cure it. But yeah, careful with the balance between current and voltage drop, you're right.

if you have anything between 33r and 100r it'll be fine. The Rat for exemple uses a 47r there I think. Pretty standard value.

D taper? 🤔 Yeah without knowing anything Id try a 47k or 100k resistor between lug 2 & 3 of the pot and see what happens. And if its doesnt change anything try the same thing between lug 1 & 3.

Whats the taper of the pot? Lin (50kB), log (50kA)?

I like it with C5 on a switch. About 20-30% less gain, so if you’re into low gain you’ll probably like it too Also I usually dont populate C10.

Its a good gain pot value. Log is better than lin. The Timmy v2 used A1M. Go for it!

Yep, I was about to say the same thing!

There already is a feedback section in the Ghost Echo. If yours doesnt oscillate when you crank the « dwell » knob, try and reduce R8 (22k) :)

Yes, an audio probe is easy to build and extremely useful. Did you already post voltages? Does the treble pot work as expected? Could you try a pair of back to back diodes (germanium or schottky - bat46, bat41) in parallel with one of the Ge diodes? Just to see if you get distortion with a...

Dual 100kB for gain, 10kB for treble yes :) A = Audio / logarithmic B = linear

I always use A10k instead of B10k for volume in a Klon for that reason. You should try it :)

Very nice build! I wonder about the HPF section of the pendulum. It seems the cutoff frequency is 1950Hz, which seems very high, as I remember both the Cardinal and the Twin Peaks tremolos use a cutoff frequency of about 750Hz The LPF section seems a bit more standard (400Hz, the cutoff chosen...

Hey, sorry Im not gonna be very helpful, I can't remember what I did, and I didn't take notes. I think I based the electra circuit on the JTM from tagboard, don't know if it's the same schematic as the pedalpcb one. Maybe try and change the diodes to diodes with a higher threshold, like 1N4148...

Hey! Sorry I didn't reply sooner, glad you found the answer :)