Another bright idea Eric.......

[ecca]

Because I fall off bloody pedals !
It's an intricate balancing act standing on one leg wagging the other up and down, especially when you've had new knees.
Any way it's something else to cart around and mess about with wires and leads.
The violining is more intuitive than using the standard volume control and , of course,it's impossible to operate both tone and volume controls together normally.

[JimN]

Got to see (and hear) it at ShadowFix.

[ecca]

After playing around with this for a while, the combined vol/tone idea isn't too useful.
With a vol/tone pedal you can control with the angle of your foot when each effect comes in individually, with one dual pot you've lost that control.
The vol and tone come in together and it's not so good.
I've acquired a 1/4 turn pot to try. I'll still have it on either vol or tone but not both together.

[JimN]

After playing around with this for a while, the combined vol/tone idea isn't too useful. With a vol/tone pedal you can control with the angle of your foot when each effect comes in individually, with one dual pot you've lost that control. The vol and tone come in together and it's not so good. I've acquired a 1/4 turn pot to try. I'll still have it on either vol or tone but not both together.

Ecca, a suggestion...

What you need is an internal (*) trim-pot (I know it's yet more circuitry) which lets a pre-determined amount of signal bleed through even when the volume control side of the system is objectively set to zero.

With a bit of experimentation, the DeArmond effect should be available. After all, a 610 doesn't turn the guitar off fully when backed off, but it does allow the full sweep from bass to treble along with a move from (say) 1/4 volume to full volume.

As a practised user of the 610 (if I say so myself), I'd say that the effect is produced most accurately by a straight-line diagonal sweep from left and back to down and right, so it is certainly capable of being modelled.

JN

[* internal to the guitar, not to you.]

[ecca]

Right, I've revamped it again.
The combined vol/tone worked but I didn't like the 'sweep', it was not as controllable as I'd wished.
I now have a 1/4 turn pot as the thumbwheel pot,( full movement in 70 degrees ) made by Goldo.
There's a push/push 250K pot on both original tone and volume controls.
Operating the volume switch enables the thumbwheel as a volume control and cuts the normal volume control.
Operating the tone switch enables the thumbwheel as a tone control and cuts the normal tone control.
But....... and this is pure chance, I hadn't planned it, operate both and I get exactly what I was looking for, a combined vol/tone sweep that I like.
I don't quite know how it works !

Thumbwheel4.JPG

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[JimN]

Got to hear it.

JN (DeArmond user for 45+ years)

[ecca]

and......( the whole point )..... you can do violining while using a plectrum...........

[JimN]

and......( the whole point )..... you can do violining while using a plectrum...........

...with a pedal!

[ErikMAMS]

Ecca
I'm wondering about the combined vol/tone setting. I can see how the tone variation works, but confused about the actual vol/level changes (if your wiring schem is correct as drawn, no offence).

Erik

[ecca]

Well bully for you JN.
I've had a DeArmond, I've also had a what was a better Bigsby Vol/tone pedal and I've still got at least 2 volume pedals knocking about.
They're for wimps.
It's just more stuff to cart round.

Erik, the connections were ticked off as I made them, I'm mystified how it works, it wasn't the intention.