Crybaby wah pedal into a Rack-Mounted wah system

[WLTerry]

So a friend of mine found out my interest for the DIY guitar gear and he came asking if I could modify his ordinary Crybaby wah pedal into a fancy rack-mounted wah system, a la Dunlop DCR-2SR Rack Wah. checking the pdf manual from the Dunlop site, seems to be easy to add the vol/wah switch, the range and Q controls, etc... But a question came in: What about the pot and switch controller? I mean, Can I transmit the Pot signal from the pedal to the rack without loosing that signal due to the distance between rack and pedal?

I've read the RG Keen's wah article and there is an interesting mod using a LDR connected to the Pot circuit (0-9V) and transmit this signal with a stereo cable. Is this the correct way to transmitt the pot signal to the rack?

Also I need to transmitt the switch state (effect ON/OFF), but the stereo cable wouldn't transmitt the switch stare I guess.... So, do you guys have suggestions? or do you know how this Dunlop DCR-2SR Rack Wah works? I'll appreciate any input. Thanks guys!

Will

[petemoore]

So a friend of mine found out my interest for the DIY guitar gear and he came asking if I could modify his ordinary Crybaby wah pedal into a fancy rack-mounted wah system, a la Dunlop DCR-2SR Rack Wah. checking the pdf manual from the Dunlop site, seems to be easy to add the vol/wah switch, the range and Q controls, etc... But a question came in: What about the pot and switch controller? I mean, Can I transmit the Pot signal from the pedal to the rack without loosing that signal due to the distance between rack and pedal?
  There's a way to use an LDR/LED to control wah [takes two sets IIRC, and I'd guess would need 'tuned]...using a controlled voltage [via pot?..or] to control leD brightness...make that go through the neccessary long wires, then have the signal wires short/inside with the rest of the wah circuit.
  I've read the RG Keen's wah article and there is an interesting mod using a LDR connected to the Pot circuit (0-9V) and transmit this signal with a stereo cable. Is this the correct way to transmitt the pot signal to the rack?
  Far be it from me to disagree with RG, but it looks like a good way, you could use anything that makes the connections.
  Also I need to transmitt the switch state (effect ON/OFF), but the stereo cable wouldn't transmitt the switch stare I guess.... So, do you guys have suggestions?
  More wires or something fancy...
  Something fancy...remote controller [too fancy...problematic], either a fourth wire to the remote switch and Jfet bypass switching or...and I forget the favored switching IC's...relay [dahh...I think Jfet's like in a Boss Bypass.
  and or do you know how this Dunlop DCR-2SR Rack Wah works? I'll appreciate any input. Thanks guys!
  don't know how it works, I would guess it's photosensor{s for wah sweep [could be a twin T?...hard to say], and Jfets for bypass, and...uses a special multi conductor cable and plugs?
  You know you'll want to bypass, I'd get that working while working on an leD/LDR type wah sound...to get the wah tone of the DCR quickly you would want a schematic or skechty idea of what it uses to make wah sound...ie if it has an inductor your probably 90% there.

[bond]

Thought I'd bump a thread rather than starting one 

Hey all,
Setting up my interface box for my rack, and thought I'd throw a remote wah circuit inside it,
I've patched together what I found in the anderson article and on RG's site, and made up a little remote wah schematic with the average mods on it:

http://img223.imageshack.us/img223/9354/wahcircuitcp8.png

Are there any changes that should be made? (perhaps regarding switching the relay, I know they can make a very audible pop)

As I've got a crybaby shell, have most of the components on hand, and think I'll grab a fasel inductor off ebay, I'd like to iron out any errors before etching it..

cheers
Mike

[bond]

Can't seem to edit my post 

However slightly neater and updated schem:

http://img99.imageshack.us/img99/534/wahcircuitsz5.png