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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

I can measure them, but I don't know the test conditions on my multimeter. I can measure some of my MPF102 as well so you can compare to your measurements

Now you have me curious, is it necessary to select for Vp/Idss when using jfets as clippers?

Found the e-mail. I bought them at a brazilian store called Compomil (not sure if they do exports, customs clearance can be tricky here in Brazil), back in 2014. They were ~$0.25 back then.

Sadly... I originally bought 40 of them in hopes of finding matching sets for some phasers. I've been using them as buffers ever since

There you go: Vp (V) Idss (mA) 2.91 6.6 2.32 4.3 1.64 2.1 2.75 5.9 1.82 2.8 2.94 6.7 2.55 5.4 1.82 2.6 2.70 5.9 3.01 7.0 Can you share where you plan to use them? I have quite a few of them that I'd be interested to use

I'm using the rog tester with 100 ohm and 10meg resistors. My multimeter claims to have a 40MOhm input impedance. According to the 2n3819 datasheet, Idss can go up to 20mA

I was counting on you to have a solution! Both can be easily done, which one do you recommend?

I can do it, give me a couple hours! Not sure how reliable the Idss readings will be, because it can be too high for the jfet matcher (if I remember correctly)

This one looks amazing! Great job!