How to make B-Blender blend control switcheable?

Started by Slade, March 01, 2012, 11:51:36 PM

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Slade

Hi,
I'm just working on a bass overdrive and I'd like to add a Sean's B-Blender, but I need to have 2 switcheable Blend controls for it.

Here's the circuit: http://seanm.ca/stomp/bblender.html

So I'm wondering what would be the best way to implement it?

Would a 3PDT switching 2 lugs of the blend pots (using the third pole for a led) work without issues like popping and stuff?

What have you guys done?

Thanks,
Fernando.-

slacker

You should be able to wire the outer lugs of the two pots together and just switch between the wipers. So you can use a DPDT, half for switching the wipers, half for the led.

Slade

Thanks, slacker, I knew I shoudn't have worked late yesterday... :D

Slade

I'm just wondering... If I do as you say, I'd have a 50k resistance in parallel to the Blend pot that's active. So, should I use 100k pots?

slacker

It will work fine with two 50k pots, no need to change them. In that design the value of the pot or pots, isn't important, almost any value will work.