How much leakage is too much? 100uA is common, 200 happens pretty often. More than 300uA means the device is suspicious, and more than 500uA I would say is bad.
1 v 7A - Omigod it took me like a full minute to realize those were 1s and not 7s, I was like “holy crap that’s an awful set of AC128s OHWAIT”
B - a good chunk of the Fuzz Factory is a Fuzz Face, so Fuzz Face rules are a good place to start
From http://www.geofex.com/article_folders/ffselect.htm
Thanks, that definitely gave me more to read about. I’m curious what the op amps role is in a Tonebender MKII, I’m at the point of trying to absorb as much information as possible about this sort of thing, it seems related more to the power section of the circuitFuzz Factory has more in common with a Tone Bender MKII than a Fuzz Face…
Yea, that’s a voltage inverter. The OG was Ge/PnP. To run that circuit with most power supplies you have to flip the voltage…Thanks, that definitely gave me more to read about. I’m curious what the op amps role is in a Tonebender MKII, I’m at the point of trying to absorb as much information as possible about this sort of thing, it seems related more to the power section of the circuit
I read all of it, there’s a couple links I’ll check out within that discussion but honestly the whole thing was quite cringe, that OP was trying to engage in a discussion and everyone else was handwaving them off with “why wouldn’t it”, “of course it’s like that”, or “you need to know more”.Yea, that’s a voltage inverter. The OG was Ge/PnP. To run that circuit with most power supplies you have to flip the voltage…
Check this out: https://www.diystompboxes.com/smfforum/index.php?topic=120704.0
Well, I read for the info, not the personality. You would want to try and match the measurements of Q2 and 3 in a Ge Tonebender MKII: 70-ish hfe for Q1, and 120-ish for Q2. You don’t want it too leaky, but the stuff you posted in the OP should work. Some of those transistors would work great in a MKI Tonebender, or an FZ-1…I read all of it, there’s a couple links I’ll check out within that discussion but honestly the whole thing was quite cringe, that OP was trying to engage in a discussion and everyone else was handwaving them off with “why wouldn’t it”, “of course it’s like that”, or “you need to know more”.
Yeah the first five the photo are ~75hfe and the second five are ~120hfe which is what I requested, but I didn’t also ask for low leakageWell, I read for the info, not the personality. You would want to try and match the measurements of Q2 and 3 in a Ge Tonebender MKII: 70-ish hfe for Q1, and 120-ish for Q2. You don’t want it too leaky, but the stuff you posted in the OP should work. Some of those transistors would work great in a MKI Tonebender, or an FZ-1…
Thanks for the insight, I wonder, can I change the value of a resistor on one of the circuits that has the 500uA leak to something higher to bring the bias back down?In my very limited experience, high leakage in Q2 makes it bias at 7-8V instead of the usual 4.5V, which means it will have more treble while maintaining the fuzz tone - biasing a Fuzz Face that high makes it sound more like distortion.
It's TB MK1.5 vs FF.
In an MKII I want leakage so it sounds brighter - it's a 1.5 with an extra transistor.
For a Fuzz Factory I would use low leakage parts, however. It's already crazy enough. Anything below 100 is low leakage for me. I find these quieter and more stable.
of course, just don't tell Mr. VexThanks for the insight, I wonder, can I change the value of a resistor on one of the circuits that has the 500uA leak to something higher to bring the bias back down?