Supreaux Deux alternatives or mods

[dimaugh]

Hi there,
I'm trying to get a certain sound for a fretless double stringed lute with glass fingerboard I made. So far, what sounds the closest to what I want is the Supreaux Deux by ROG, but there's a couple of issues:
- I want a milder distortion, or a cleaner sound
- it'd be convenient to run it at 12v (the Supreaux Deux is ideally run at 18v)
which contradict each other, since at lower voltages we loose headroom.
Could we simply reduce the drain to source resistance ratio?

Or else, do you know of circuits that sound similar? And that are a bit simpler.
(I tend to like surf overdrives)

[antonis]

For a 10k(trim)/390R & 50k(trim)/1k, altering denominators should offer nothing to gain..
(in the mean of individual stage gain could be set to less than unity - considering pots able to set down to 100 ohms or lower..)

[dimaugh]

For a 10k(trim)/390R & 50k(trim)/1k, altering denominators should offer nothing to gain..

But those values are different for the 9v original:
http://www.runoffgroove.com/supreaux.html

On a side note, I just found the Surf Green Timmy and loved it. In its milder settings it's more or less the sound I was looking for. So now I'm considering modding it for lower gain, lower distortion, and some tone tweaking based on this analysis
https://1.bp.blogspot.com/-qmzOMobAhcw/VjeM8_IXohI/AAAAAAAAB3I/tCCq1zhZQC4/s1600/JANRAY%2BANALYSIS%2BCoda%2BEffects.gif

Should I substitute the diodes for LEDs for a milder sound?

[antonis]

But those values are different for the 9v original:
http://www.runoffgroove.com/supreaux.html

So..??
For Gain, ratio rather than absolute values is what counts..

In both cases, Drain pots set individual stage gain range so, as long as they can be set to almost zero resistance, Source values are of minor significance..

[antonis]

As for TIMMY "analysis", I have some reservations..
(both for the circuit itself and for some functions depiction..)

[dimaugh]

For Gain, ratio rather than absolute values is what counts..

Which is what I was suggesting in the first post. You think there's no space for some small tweaking, only so that 12v sounds as clean as 18v?

But I think I'll be going the Tube Screamer / Timmy mod route in the end, since there's much more room for modding for a noob like me anyway. And much more info.

As for TIMMY "analysis", I have some reservations..
(both for the circuit itself and for some functions depiction..)

Well, it's not dissimilar to other Timmy schematics I'm finding. Also, the topology is not too far from that of the Tube Screamer, on which there's many more analyses, so I'm hoping that should be a good start.

[andy-h-h]

I've built a supereaux and the nearest thing I can think of is the Fairfield Barbershop.   Can go from clean to a lot of drive, with a lot of great sounds in between.   I prefer the Fairfield. 

[antonis]

For Gain, ratio rather than absolute values is what counts..

Which is what I was suggesting in the first post. You think there's no space for some small tweaking, only so that 12v sounds as clean as 18v?

Communication breakdown..

I got what you suggested in the first post but I twice told you there isn't any need for altering Drain/Sourse resistors ratio 'cause Drain resistors are fully variable (trimpots)..
They can set individual stage gain from zero to maximum and you wish less than maximun gain..

Power supply has to do with headroom (margins of undistorted signal amplitude) and consequently to clipped signal waveform..
(i.e. the lower the supply voltage the "harder" the distortion for circuits with identical gain..)

[antonis]

As for TIMMY "analysis", I have some reservations..
(both for the circuit itself and for some functions depiction..)

Well, it's not dissimilar to other Timmy schematics I'm finding. Also, the topology is not too far from that of the Tube Screamer, on which there's many more analyses, so I'm hoping that should be a good start.

I was refering on the posted above particular circuit analysis..

e.g. (in breef): R9/R10 values should be reversed.. Almost the whole IC1_B Gain analysis is false..

If you wish to proceed with any Tube Screamer variation, it should be more than fine..