Volume pedal with two outputs

[appleburger]

So i just ordered a new amp that has two inputs where each channel has a separate preamp section. What I'd like to do is make a pedal that would allow me to feed both inputs and adjust the level going to each input with a single volume/expression pedal. It seems like a really easy thing to rig up but since I've never built a pedal before i wanted to run it by someone that knows what they're doing.

Essentially I want a splitter with the ability to mix the level of each output with a foot pedal. Toe down would be 100% output one, heel down would be 100% output 2 and flat foot would be 50/50, etc. I assume it will be a matter of buying a volume pedal and replacing the pot in it with a different type and then adding a second output jack. That being said I've never opened a volume pedal, I've only made assumptions about what's inside. Also, what type of pot am i looking for?

I know things are almost always easier said than done, which is why I'm consulting. Thanks.

[PRR]

It's not that easy.

Dual 500K linear may "work", with significant loading on the guitar, and loss of treble when in the 50:50 position.

[petemoore]

So i just ordered a new amp that has two inputs where each channel has a separate preamp section.
  Often these preamps are either/or: switch to one, or the other.
  Don't know if that's the case here.
     

[Processaurus]

http://www.geofex.com/Article_Folders/panner.pdf

You don't need a dual gang pot to pan one input to two outputs.  You would want a buffer (like the GGG jfet buffer or opamp buffer) in front of this circuit to preserve the guitars tone if it is being plugged straight in.

[Gurner]

http://www.geofex.com/Article_Folders/panner.pdf

You don't need a dual gang pot to pan one input to two outputs.  You would want a buffer (like the GGG jfet buffer or opamp buffer) in front of this circuit to preserve the guitars tone if it is being plugged straight in.

Without wanting to put a 'panner in the works'   ....why would he need the JFET buffer if he goes with the "Pan between outputs" circuit at the end of your link - http://www.geofex.com/Article_Folders/panner.pdf ? (that first opamp/preamp is acting as a buffer)

[Processaurus]

http://www.geofex.com/Article_Folders/panner.pdf

You don't need a dual gang pot to pan one input to two outputs.  You would want a buffer (like the GGG jfet buffer or opamp buffer) in front of this circuit to preserve the guitars tone if it is being plugged straight in.

Without wanting to put a 'panner in the works'  ....why would he need the JFET buffer if he goes with the "Pan between outputs" circuit at the end of your link - http://www.geofex.com/Article_Folders/panner.pdf ? (that first opamp/preamp is acting as a buffer)

Good catch, I was just looking at the first circuit fragment in that article, but the fleshed out "Pan Between Outputs" circuit further down indeed has an opamp buffered front end, and would work for guitar as shown, using something like a TL074 quad opamp, and making a standard 4.5v voltage reference supply (called Vb on the schematic).

[appleburger]

Good info! That at least points me in the right direction. Thanks.

I did double check with the amp manufacturer and both inputs are independent and can be used at the same time.

[Ben N]

There is a Erie Ball stereo/panning pedal that works fine. If you're buying a VP anyway...

[appleburger]

thats exactly what i need, i didn't know anybody made one. thanks!

[Top Top]

The mechanical aspect of the rocker foot pedal would be the most difficult aspect of the whole project.