Recent content by zakco

Thanks Robert!

I'm building a double pedal with a Chickenhead (Ge Rangemaster) in first position and a Pauper (Prince of Tone) in second position. Because the Chickenhead needs to stay in first position due to input impedance, I won't need an order switch, but I would like to be able to turn the two sides...

I'm designing artwork for the Pauper and I need to confirm the switch positions: - up for soft clipping - middle for no clipping - down for hard clipping Is this correct?

I've noticed that when I import 125B drill templates from both PPCB and Aion into inkscape, the dimensions are not 62x177mm as per Tayda specs. They end up being 64.4x119.5mm (approx 2.5 mm larger in each direction). Is this extra size for the non-printable rounded edges of the enclosures? If...

It doesn't get brighter as in acting in reverse to the high cut, but listening carefully, I'd say that the effect is less noticeable. The extra harmonics from the boost knob cranked make the high cut more pronounced. I think this non-linearity is actually a benefit in practice. By 13.3n, I...

After much fiddling, confusion and disappointment, I stumbled across the idea of using a capacitor to ground via an on/off switch at the output of C4. After trying a few different values, I settled on 3n3, which perfectly rounds off the highest, unwanted frequencies without losing much level or...

Aha! All of my other breadboards have continuous power/ground rails - it never occurred to me. Thank you! Initially the output was extremely low and I thought that the biasing was off on the Jfet but it turns out that my 2n5457 was faulty. I replaced it with a J201 and everything works, but I...

As per the title, I've built the Glory Hole circuit on PPCB's proto board using it's built in Vref. The circuit passes signal right to the end, but the Tone and Volume pots have no effect. The Drive control works perfectly, so does the Hi Cut switch and the clipping sounds as expected. I've gone...

Haha. Yeah. But in all seriousness, with the variable input filter, it’s not really a treble booster any more, it’s completely full range. And what started me on this path is the extreme differences in the top end from pickup to pickup - even when used full range. This circuit would be way more...

Well, this has been an interesting experiment for me. I tried the Tillman (biased to 6v) both in front of the tone stack and after it and in both cases it actually adds too much gain. The Rangemaster already has so much level that the extra 3db from the Tillman (it actually sounds like a lot...

Oh man...I could have saved myself a couple of hours of confusion if I'd just zoomed in on the schematic a bit. Sheesh, what a dummy I am. I thought it was pretty odd to connect the output to both +9 and ground, but unfortunately I don't have enough experience to question things sometimes. Oof...

Yes, typo. Fixed that, sorry. Input is gate - It passes signal at the source but nothing at all comes out of the Drain

I've tried 3 J201s in this circuit. All 3 show 8.4v at the drain and fail to pass any audio at the drain using a probe. All 3 also work perfectly in the PPCB simple jfet buffer https://forum.pedalpcb.com/attachments/screenshot-2026-03-18-at-9-24-33 pm-medium-jpeg.113723/ Is there an explanation...

Is this the Tillman circuit you're talking about? https://till.com/articles/GuitarPreamp/ I've built this on it's own on a separate breadboard for testing and for some reason I can't get it to pass signal. Using a probe, I have signal at the source but not at the drain. MM shows 8.4v at the...

yes, I'm using a j201. I'm not sure how to bias a jfet, but I'll see if I can find a tutorial. I also have a 2n5457. Do they have more headroom?