Clean Knob Wiring Question

[Kearns892]

I asked before looking for a schematic to the Voodoo Labs "Sparkle Drive" out of interest in the clean knob, I got what I asked for, but I had to put it on the back burner so I could finish some other projects (I have quite a few circuits together that need housing), but my printer broke so I won't be able to print decals for a little while anyways and I don't have the supplies to etch. Anyways I finally got around to checking out the schematic, and I am very confused on how to wire the clean knob (still a beginner to DIY effects).

Here's a pic of the section I'm talking about, I wish i could credit it but it has been saved on my computer for some time and the origins are not noted on the schematic .



Thanks a lot for the help

[kurtlives]

Confused about? Can you be more specific?

The control is a dual gang pot if that is what your wondering.

[aziltz]

i've looked at the schematic a bit, it looks like the clean blend knob is a dual gain that acts as a mixer control.

I believe it turns up the amount clean sent through a buffer while turning down the amount of drive mixed with the clean in the next stage (volume amplifier).  Does that help?

you could infact employ it in another design, but you would have to pay attention to the size of the signal expected from the clipping/tone section of what used to be the drive.

[Kearns892]

Sorry, I understand what it does, but I am unsure how to read the dual gang pot wiring, I haven't used one before.

[aziltz]

Sorry, I understand what it does, but I am unsure how to read the dual gang pot wiring, I haven't used one before.

my guess would be to treat it like 2 separate pots with the same orientation:

3 - Clean Signal
2 - Opamp/Buffer V+
1 - Vref

3 - Vref
2 - to Voltage Divider Network post Clean Buffer.
1 - OD Signal

I think that makes sense with the way its supposed to work.  Is that what you were asking about?

[Kearns892]

Thanks a lot that's, what I needed, I'll be sure to include a dual gang  B500k in my next order.