2 effects in one enclosure

[Dinosaur_Sr]

Hi guys,

I'm currently building two fuzzes and I want to put them both into one enclosure, the difference here being that I just want to use one footswitch and have a DPDT switch to change between the effects. I'm intending to wire them both up on top of each other (so both going to the same points on the footswitch, led, power and jacks) and use the DPDT to either switch which effect is going to the output or maybe switch which circuit is getting power, would this work? I'd prefer the second option but I'm not convinced it would be safe to wire the 9v directly to the switch.

[GibsonGM]

Go look at this, Dinosaur:  http://www.generalguitargadgets.com/pdf/two_in_one_wiring.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a

You CAN use DPDT's to do this, using THIS diagram, if you omit the LED, but you're better of saving them and getting two 3P3T's from Small Bear.

If you don't know how this is working from the PDF, ask again - hope this helps!

Just 'laying them on top of each other' is a very old school way that actually WAS done for a while. It results in "tone sucking", where part of your signal (high freq's, very much) is sucked into the "off" circuit, and sounds like poo.   You need better isolation from each other (total isolation, my friend, that switching provides). 

[samhay]

You can use a DPDT or 3PDT footswitch wired conventionally and simply connect the 'to board' and 'from board' wires to the centre lugs of a DPDT, which then toggles between each effect's input and output.

[Pojo]

+1 for both Mike and Sam's replies. In other words, it's better to provide true bypass for whichever effect is not in use by switching both the ins and the outs. A DPDT can do that as long as you don't want to switch leds also, as mentioned.

[GibsonGM]

+1 for both Mike and Sam's replies. In other words, it's better to provide true bypass for whichever effect is not in use by switching both the ins and the outs. A DPDT can do that as long as you don't want to switch leds also, as mentioned.

Well, yeah, unless you want to build one of these:  http://www.geofex.com/article_folders/millenium/millen.htm

With the Mil. Bypass, you can use a DPDT AND still have an LED.  Just more circuitry to build.

[candidate]

maybe switch which circuit is getting power

capacitors need to be charged for the effect to work.  capacitors take time to charge.