Supro Drive
I just got one of these and I'm impressed but kind of on the fence, because it's WAY too gainey for me and only work for my playing style with the guitar volume way back. It's from Pigtronix/supro and it claims to be based on the power amp section of a supro and to make use of a transformer for saturation, which I'm skeptical about but I'm just a liberal arts major with only the tiniest of clues
I'm wondering if it's radically different from a Supreax Duex? Supro says it's an all new design, no diode clippin
Here's a picture:
The little trimpot is for controlling the gain range when you use it with an expression pedal
Off the top of my head, I can see two electrolytic caps where the Supreaux only calls for one (?) and there's a Cmos down there in the lower right, possibly to control the expression pedal. If there is any interest I can take it apart further, to see the other side of the board, but only if there's interest because I don't want to F up the pedal
I'm wondering if it's radically different from a Supreax Duex? Supro says it's an all new design, no diode clippin
Here's a picture:
The little trimpot is for controlling the gain range when you use it with an expression pedal
Off the top of my head, I can see two electrolytic caps where the Supreaux only calls for one (?) and there's a Cmos down there in the lower right, possibly to control the expression pedal. If there is any interest I can take it apart further, to see the other side of the board, but only if there's interest because I don't want to F up the pedal
- bancika
- Resistor Ronker
interesting, attiny13a? maybe they use it for switching.
I'd like to see the schematic, but wouldn't risk your pedal for it. Can you see the transistors? Is it silicon output stage, sounds like silicon on demos.
I'd like to see the schematic, but wouldn't risk your pedal for it. Can you see the transistors? Is it silicon output stage, sounds like silicon on demos.
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- thesmokingman
- Breadboard Brother
re the bypass: http://www.muzique.com/schem/bypass.htm
if I had to guess, probably supreaux deux or similar with a small audio transformer to "saturate" with the final jfet stage. would know more with better pictures of both sides of the PCB
if I had to guess, probably supreaux deux or similar with a small audio transformer to "saturate" with the final jfet stage. would know more with better pictures of both sides of the PCB
- Dirk_Hendrik
- Old Solderhand
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Thanks for the link.thesmokingman wrote:re the bypass: http://www.muzique.com/schem/bypass.htm
Why would I want this!? The major reason for implementing a uC in my bypass scheme is to have it analyse my incoming signal and do switching on exactly the 0-crossings. Therefore avoiding pops.... but that seems to be the thing that is not there.
Ok I took it apart.
I really like this pedal--it has a quality I haven't seen in other pedals where it feels more like an amp. also it really has that kind of grunt you get from the power amp section, and it's got lots of "sag," even at low gain.
Just from looking at it with my totally non expert eye, I don't think it's a Supreax clone--I see compenents that aren't in the Supreax schematic?
Here are some shots of the board==they are bog so you may need to open them in a new window to get the full shot
And here are some shots of the chips, best I could do with the iphone
I really like this pedal--it has a quality I haven't seen in other pedals where it feels more like an amp. also it really has that kind of grunt you get from the power amp section, and it's got lots of "sag," even at low gain.
Just from looking at it with my totally non expert eye, I don't think it's a Supreax clone--I see compenents that aren't in the Supreax schematic?
Here are some shots of the board==they are bog so you may need to open them in a new window to get the full shot
And here are some shots of the chips, best I could do with the iphone
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I'm pretty sure the white-package device on the backside of the board is a DPDT Relay, so that's probably what does the bypass switching (the pedal's switch seems to be either a momentary one or an SPDT, so that would make sense).
The pins are probably for accessing the ATTINY chip for debbuging. No idea what it's purpose might be, tho.
Without side-view pics around the transformer, it's pretty impossible to know exactly where it's connected to.
My guess: It's a low-power MOSFET amplifier made to match the tone of a Supro amp.
The pins are probably for accessing the ATTINY chip for debbuging. No idea what it's purpose might be, tho.
Without side-view pics around the transformer, it's pretty impossible to know exactly where it's connected to.
My guess: It's a low-power MOSFET amplifier made to match the tone of a Supro amp.
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- jalmonsalmon
- Solder Soldier
Myy my, what a spammer
- jalmonsalmon
- Solder Soldier
Thank you for removing that spammers crap!
Anyone have a clue what the Transformer is doing?
The designer is claiming he has actually achieved magnetic saturation of the transformer. I'm beyond skeptical.
No other pedal sounds more like a real Supro amp than the Supro Drive. This groundbreaking analog pedal re-creates the circuitry of a Supro amp, from end to end, including an actual output transformer. As the Supro sound has gained widespread popular recognition as a pillar of classic rock guitar tone, numerous amp and pedal companies claim to have captured our coveted sound by cloning the original Supro preamp, in stompbox format. They all got it wrong! The real tone of a genuine Supro amp has everything to do with the unique phase inverter design, Class A power amp section and the magnetic saturation that occurs via the old-school transformers found in these vintage tone machines. In short, the iconic sound of a Supro amp being pushed into overdrive has everything to do with the POWER AMP.
I bought one of these used. I hope you all will help me dissect it when it comes next week.
I'm not bonding with this pedal and struggling to find motivation to trace it.thehallofshields wrote:I bought one of these used. I hope you all will help me dissect it when it comes next week.
What are all of your opinions?
- Belanger88
- Breadboard Brother
I’d love to see it traced
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