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Just etched this one to build it this weekend EDIT: I just verified the board: layout is good and the pedal sounds absolutely amazing. This is getting boxed as soon as possible In case anyone wants to etch their own board and @Chuck D. Bones says it's alright, I'll be happy to share it.

My bad, I just assumed it was the drain resistor.

Thanks! I'll try to breadboard with what I have and see if I get reasonable drain voltages. How high can I go with the drain resistor before it begins to impact tone too much? (if I remember correctly, the drain resistor is part of a filter somewhere)

I'm inspired by Brett and Cooder to give this one a go (it won't look nowhere near as good, I'm certain). Is there any alternative jfet that could work @Chuck D. Bones ?

This looks amazing! I'm loving this series of builds!

This is taken from Digitech website: "INTERNAL DIP SWITCHES The Looking Glass’ Input Filter control is passive and interacts nicely with your guitar’s electronics when not using a buffer in front of it. However, when using buffered pedals before the Looking Glass you may want to adjust the two...

You have to invoke the power pins. Just right-click the part and select invoke

I have version 3 from 2017 and there'as the CD4069 in the '40xx-2' file That's the one I have in my library

Just a heads up. OP has asked for the CD4069, and you have shared the CD4049. Pinout and packaging differ

That does make sense. I bought a bunch of 4049s when I built my Electric Mistress (early 2015, I once had the good habit of documenting my builds)

I have bought them at least 10 years ago, I reckon

It's an STMicroelectronics one (in theory at least, might be rebranded). It's quieter than I was expecting I really like the tone network. This will probably replace the Big Muff I have boxed right now edit: part number is HCF4049UBE

Still a long way to go before I'm capable of building beautiful looking boards, but it works! And it sounds VERY good, Chuck! As usual. Tone stack sounds fuller in the mids (and that's what the tone stack calculator tells me as well). PS: Belated happy birthday!

My guess is they don't make trimpots in the same footprint as the original version anymore :LOL:

Lindo isso! Nicely done!

Nice work! Thanks for sharing it! Impedance is one of the many concepts in this hobby that give me a bit of a headache, and I was confused to see a 145k input impedance option. Isn't that a little lower than we'd expect on a buffer?

Ok, I see what you mean. I'm not sure I'll do it, but if I do, I'll report back here

I'm not sure I understand what you mean by that. Shouldn't the voltage DMM be parallel to the diode?

Should an arrangement like this (with the diode in place of the resistor, of course) work for tracing the curve? I'm not sure if it'd be precise enough, though, with my multimeters

Forward Voltage mV 2sk246Y 734 2sk246Y 720 2sk304C 726 2sk304C 726 2n3819 752 2n3819 753 mpf102 758 mpf102 760 Added a couple other jfets, just because