Is there a layout of the Engineer's Thumb with all the bells and wistles?

[alparent]

I want the full version with the 5 knobs. I want it ALL! And I want it n........

Thanks

[Kesh]

The one with the red markings for optional components covers all 5 knobs.

[midwayfair]

The Sabrotone layout has all five knobs on vero.

However, the remaining three knobs can be added simply by omitting a particular resistor on any of the existing layouts. They're all just variable resistors.

I will say, too, that if you try this, make sure it's reversable. The extra controls are not terribly useful ... there will be some "broken" settings on the attack and decay controls, and the threshold control, as Merlin noted, does almost exactly the same thing as the sustain control.

[Kesh]

The one thing I'd like to do with this is give it more headroom. Say a +/-15V power supply.

I can't see any obvious problems adapting it.

I'd also like to figure out how to set the linearising diodes on the LM13700, to further reduce noise and distortion.

So two things.

[midwayfair]

The one thing I'd like to do with this is give it more headroom. Say a +/-15V power supply.

I had some headroom issues with the protective LEDs and a friend's high output pickups. I removed them and it stopped distorting. I didn't think of doing a bipolar supply for some reason. EDIT: nevermind, it's because he ended up with one of the two 1590A builds I did ...

[Keppy]

I'd also like to figure out how to set the linearising diodes on the LM13700, to further reduce noise and distortion.

You just run about 1mA into the diode bias input (pin 2 or 15). I don't think it will do what you want, though. The distortion eliminated occurs on larger signals, not smaller ones. Using the diodes raises the acceptable input level from a few millivolts to a couple of volts or so. As far as reducing noise, that's not a direct benefit of the diodes, but a benefit of using the larger signals they allow. If the circuit is designed without the diodes, then the levels involved will not likely benefit from using them for either of the purposes you mention. Might be a different story if you're cranking up the input level.

[Kesh]

>Might be a different story if you're cranking up the input level.

yes, am looking around to make a line level comp