Just finished a Demo Tape Fuzz clone on a board from Jed's Peds and weirdly the gain/trim pot does full gain fully clockwise but also fully anticlockwise with different shades of gain in between. Is this normal?
That's odd. I'm not familiar with that specific project, but that's not how the DTF works. You may have a solder bridge somewhere causing that, or a bum pot.
cool will have a look for solder bridges and try a new pot
Definitely not normal. Gain pot behaves as normal, though it only actually gets fuzzy right at the end of it. Also the vol has a HUGE amount of vol on tap. You'll barley turn the thing on and get unity.
Oh yeah you definitely want a 100k log for volume. It has a LOT of volume on tap. The distortion only comes from the opamp.
A beautiful circuit.
can't see any solder bridges, must be a duff pot
I've never had a bad pot... Pretty sure it's something else. But you might be right.
I had never heard of thoses pcbs.
He seems to use some Madbean drawn schematics (as seen on the build doc of the Tape fuzz)
Quote from: Boba7 on November 24, 2016, 10:31:03 PM
I've never had a bad pot... Pretty sure it's something else. But you might be right.
I had never heard of thoses pcbs.
He seems to use some Madbean drawn schematics (as seen on the build doc of the Tape fuzz)
I agree it could be something else, but i have gotten a pot with a bad disc in it that behaved similarly. Its easy enough to test with a meter. I haven't heard of the vendor before either.
just measured the resistance on the pot and I'm getting 03.3 ohm at both ends of the sweep on a 20k pot. Definitely something wrong with the pot