thanks for the prompt reply. I was looking at punkifier schematics like https://schems.com/Schematics/Fuzz%20and%20Fuzzy%20Noisemakers/DOD%20FX76%20Punkifier.gif and there seems to be a version with several J201s and different values, I'm wondering if the pedalpcb version is a loose approximation of the real pedal?
Yes it is a bit simplified compared to stock DOD Punkififer since it is intended for mechanical true bypass switching while the DOD was using electronic switching using a few FETs and a CD4007 chip. The audio circuit remains and sounds the same.
This thing is working 90%. Trying to figure out why I’m getting such a huge volume drop when I turn the Punk function clockwise. Obviously it’s blending in two extra clipping diodes but I’m not getting much extra gain, just vol drop. I looked at the schem but didn’t see any anomalies that popped right out. I did use TL072’s because the 4558’s I had, had the wrong suffix. Can’t imagine that being the problem. It sounds so good but I’m not getting that fuzz sound out of it at all. Knifed and cleaned the tracks and double checked my work. Can anyone offer me any advice?
Ok I tried connecting Punk 2 to Punk 1 and 3 independently. Full signal through 1 and nothing at all through 3. No sound. I think that’s what you were suggesting. Seems that the circuit must be broken somewhere. But nothing seems wrong.
Found it. Sorry for the fuss. Thanks for the help Alex. User error. I misplaced the noise filter cap near Q2. Sucking all that voltage away from that transistor. I did notice that the 47k connected to the input cap on the schematic reads 470k. Dunno what difference that would make. Maybe effect input impedance? Anyhoo, this thing is a barn burner. Really excited about this one. Many gracias 😊
It seems that the 47k connected to the input cap should indeed be 470k. Gave it a shot. It’s giving me a bit more gain. The sweep of the “Slam” pot is more useable.
Hahaha, idk. Maybe it’s too much. For future builders, play with this resistor value maybe. 220k sounds pretty good but I miss the og character. Now I’ll shut up about this fing DOD pedal. Sorry if this thread is 90% me ranting.
#AlexS it didn’t sound quite right. I searched for a gut shot online of an original and found a post by Mirisol. It looked like a 47k in the pic. So I swapped back over. I think the above is correct. It sounds pretty damn cool as is. Might be one of my favorites. There should be more like this. Maybe with a slicker fuzz sound. Blended they sound great though.
The original had a different buffer up front. This is based on the PedalPCB version with an op amp. It should work the same, but that whole section is different on the DOD.
Yeah I did notice that but in the end the part listed in the PCB schem sounded wrong to my ears. My brain heard more dirt and was like “yup”, but after some testing “yeah no”. It’s possibly a typo. The increased resistance made it sound fizzy and it overloaded the fuzz position.
This thing is going to be so useful, thank you. One one side you get a smooth DOD250 type drive, the other is a nasty fuzz and then all in between.
ReplyDeleteI finally built it with B100K pots. I tried W100K, and in some settings the taper helped, in others it didn't. It would be worth experimenting.
Is it really 22M resistors there? or is it a typo
ReplyDeleteYes, it is. Odd but true...
Deletehttps://www.pedalpcb.com/docs/Pacifier.pdf
thanks for the prompt reply. I was looking at punkifier schematics like https://schems.com/Schematics/Fuzz%20and%20Fuzzy%20Noisemakers/DOD%20FX76%20Punkifier.gif
Deleteand there seems to be a version with several J201s and different values, I'm wondering if the pedalpcb version is a loose approximation of the real pedal?
Yes it is a bit simplified compared to stock DOD Punkififer since it is intended for mechanical true bypass switching while the DOD was using electronic switching using a few FETs and a CD4007 chip. The audio circuit remains and sounds the same.
DeleteOh, and the different values in the DOD schematic is typos, Bugg from pedalPCB traced a real unit and corrected the values.
Deleteawesome, thanks for the info!
DeleteThis thing is working 90%. Trying to figure out why I’m getting such a huge volume drop when I turn the Punk function clockwise. Obviously it’s blending in two extra clipping diodes but I’m not getting much extra gain, just vol drop. I looked at the schem but didn’t see any anomalies that popped right out. I did use TL072’s because the 4558’s I had, had the wrong suffix. Can’t imagine that being the problem. It sounds so good but I’m not getting that fuzz sound out of it at all. Knifed and cleaned the tracks and double checked my work. Can anyone offer me any advice?
ReplyDeleteThe mix blends in an entirely different fuzz circuit. See if you can isolate its input(n-1) and output (punk #3) and get that to work.
DeleteGood you got it working. You're right about that 47k off IC1 #3 needing to be a 470k instead.
DeleteOk I tried connecting Punk 2 to Punk 1 and 3 independently. Full signal through 1 and nothing at all through 3. No sound. I think that’s what you were suggesting. Seems that the circuit must be broken somewhere. But nothing seems wrong.
ReplyDeleteI can’t find the 10k connected to the 22nf near Q2 on the schematic. Is it there?
ReplyDeleteAnd Q2 is getting no voltage…….
ReplyDeleteFound it. Sorry for the fuss. Thanks for the help Alex. User error. I misplaced the noise filter cap near Q2. Sucking all that voltage away from that transistor. I did notice that the 47k connected to the input cap on the schematic reads 470k. Dunno what difference that would make. Maybe effect input impedance? Anyhoo, this thing is a barn burner. Really excited about this one. Many gracias 😊
ReplyDeleteIt seems that the 47k connected to the input cap should indeed be 470k. Gave it a shot. It’s giving me a bit more gain. The sweep of the “Slam” pot is more useable.
ReplyDeleteHahaha, idk. Maybe it’s too much. For future builders, play with this resistor value maybe. 220k sounds pretty good but I miss the og character. Now I’ll shut up about this fing DOD pedal. Sorry if this thread is 90% me ranting.
ReplyDelete#AlexS it didn’t sound quite right. I searched for a gut shot online of an original and found a post by Mirisol. It looked like a 47k in the pic. So I swapped back over. I think the above is correct. It sounds pretty damn cool as is. Might be one of my favorites. There should be more like this. Maybe with a slicker fuzz sound. Blended they sound great though.
ReplyDeleteThe original had a different buffer up front. This is based on the PedalPCB version with an op amp. It should work the same, but that whole section is different on the DOD.
DeleteYeah I did notice that but in the end the part listed in the PCB schem sounded wrong to my ears. My brain heard more dirt and was like “yup”, but after some testing “yeah no”. It’s possibly a typo. The increased resistance made it sound fizzy and it overloaded the fuzz position.
ReplyDelete