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Hey Chuck, thanks for checking into this. All metal film and mylar or monolithic caps. Also used fixed resistors. When probing the circuit, the hiss increased through each gain stage. This is where I was at troubleshooting when finally throwing in the towel: "I built a 2nd one with all new...

If you do build the Azabache, please let me know how you make out. My 2 builds had way to much hiss. Only noticeable when not playing, but it was crazy loud. Pedal did sound great...until I stopped playing.

Getting 4.74v on Q4 and 5.06v for Q2. Thanks for the info. And false alarm, must have been an impedance mismatch causing the noise/hiss as it sounds correct feeding the input on the amp. (Was originally testing it plugged directly into the power amp, found that adding a buffer between the two...

Just curious, I've had a few BS170s in the past with drain voltage readings way out of expectations. My vero layout build of the Acetylene is working, but I'm getting a ton of hiss. Very similar issue I had with my Azabache builds, which I was never able to resolve.

Does anyone have the drain voltages for the BS170s? (Q2 & Q4) Thx

Do we know if the J201 50k trimmer was in the original, or was there a fixed drain resistor? And if there was a drain resistor rather than a trimmer, what was the value?

Hey Bugg, Would you have an eta on the Acetylene build doc?