Tube Preamp, NYC Muff enclosure
Posted: Mon Jul 30, 2018 9:15 pm
Q: Holy shit! Where have you been?
A: viewtopic.php?f=42&t=60417
So my first fuzz pedal was an NYC Big Muff. I got it as part of a trade and wasn't blown away by the sound, but it's a well-known circuit with hundreds of dedicated mods and the chassis is enormous compared to the size of the electronics. It's the stompbox I cut my teeth on and after several years, a mess of wires, lifted traces, and a re-house, it's completely non-functional. Which is fine. I held onto the original enclosure for no particular reason.
Naturally, I decided to build a high-voltage tube preamp into it (I already had the transformers from something else that never happened, which were at least half the overall cost). It's basically a single-channel Alembic F-2B with a james tone-stack. The plate voltage for the 12a_7 is around 340v. The noise floor is a bit higher than I'd like, but I haven't played around with some of the more exotic dual-triodes with a different MU for each side. I've only tried ax7s and au7s, and the u doesn't provide enough gain. I've been able to saturate the tube with higher-output 'buckers, but with vintage style strat pups it stays clean. I put the volume before the second gain stage, so there's some flexibility there. Either way, it can pummel the front end of whatever it's plugged into.
More looking to show-off than sell, but shoot me a message if you're interested. I don't really have much use for it.
A: viewtopic.php?f=42&t=60417
So my first fuzz pedal was an NYC Big Muff. I got it as part of a trade and wasn't blown away by the sound, but it's a well-known circuit with hundreds of dedicated mods and the chassis is enormous compared to the size of the electronics. It's the stompbox I cut my teeth on and after several years, a mess of wires, lifted traces, and a re-house, it's completely non-functional. Which is fine. I held onto the original enclosure for no particular reason.
Naturally, I decided to build a high-voltage tube preamp into it (I already had the transformers from something else that never happened, which were at least half the overall cost). It's basically a single-channel Alembic F-2B with a james tone-stack. The plate voltage for the 12a_7 is around 340v. The noise floor is a bit higher than I'd like, but I haven't played around with some of the more exotic dual-triodes with a different MU for each side. I've only tried ax7s and au7s, and the u doesn't provide enough gain. I've been able to saturate the tube with higher-output 'buckers, but with vintage style strat pups it stays clean. I put the volume before the second gain stage, so there's some flexibility there. Either way, it can pummel the front end of whatever it's plugged into.
More looking to show-off than sell, but shoot me a message if you're interested. I don't really have much use for it.
