Two Pedals - One Box - Master Volume - asking the impossible

Putting two effects in one box almost looks too easy, but you will save a lot of time reading the frequent questions before starting such a project...

Two Pedals - One Box - Master Volume - asking the impossible

Postby poodlebra » 08 Feb 2011, 17:25

I've put together a twin version of a 'Great Destroyer', utilising both sides of the chip. it's effectively two pedals in one box, each TGD having it's own 3pdt footswitch wired as true bypass with grounded input (as detailed at GGG).

what i wanted to do, which sounded so simple in my head, was add an overall master volume to this monstrous device, as each TGD churns out a mammoth amount of signal, and the volume control on each one really makes a difference to the oscillation, not just volume.

however, now i'm sitting with a drilled box, circuit, many pots and a hot soldering iron, i've just realised i have no idea how to do this. any ideas?

i did think a dual gang 500k, one on each of the outputs, would do it, but that's a bit of a compromise, as it'll effect how much goes into circuit two from circuit one, again altering the overall sound.

any ideas greatly appreciated, or do i just resign myself to grommeting the hole i drilled for master volume?

Double-D.jpg


(input 2 goes to left of cap - should fix this on diagram!)
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Re: Two Pedals - One Box - Master Volume - asking the imposs

Postby Hides-His-Eyes » 08 Feb 2011, 20:56

You could set up one switch for "BP/on" and the other one for "one/two"; that would do it?
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Re: Two Pedals - One Box - Master Volume - asking the imposs

Postby poodlebra » 08 Feb 2011, 21:04

not if i want one and two on together :cry:

i want to have it in any of these states: bypass / one only / two only / one and two (output of one feeds input of two)
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Re: Two Pedals - One Box - Master Volume - asking the imposs

Postby Hides-His-Eyes » 08 Feb 2011, 21:44

poodlebra wrote:not if i want one and two on together :cry:

i want to have it in any of these states: bypass / one only / two only / one and two (output of one feeds input of two)


You can have A/B or A/A+B with two switches and a master volume, but otherwise the only solutions I can think of include relays.
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Re: Two Pedals - One Box - Master Volume - asking the imposs

Postby poodlebra » 08 Feb 2011, 22:49

i think i'll just go with the dual gang pot. it'll probably sit in a box unused anyway, i was just thought i'd check as it's pretty much the first thing i've come across in the year i've been fiddling with this stuff that i couldn't see a solution to. thanks though.
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Re: Two Pedals - One Box - Master Volume - asking the imposs

Postby scuzzphut » 17 Oct 2011, 00:27

Couldn't you just put the master volume pot after the second switch but before the output jack ? It would affect everything leaving the pedal and would only need a single gang pot.
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Re: Two Pedals - One Box - Master Volume - asking the imposs

Postby poodlebra » 17 Oct 2011, 09:10

you'd then be adding a volume control to any bypass signal too.
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