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Ok here it is, wire it like this and you have each channel that isn’t being used grounded to cancel any noise. You also have anti-pop resistors on input and output.
The pedal might already be wired like this, I really don’t know but I highly doubt it would have the pulldown resistors added. if its not wired like this just make the necessary changes.
Ok Ned. I simulated the suggested modification with some jumpers. It did greatly reduce the hum from the unused channel. However, because there is still a FX box on each amp input between the switchblade and the amp I still get hum from the fx boxes.
So, I was thinking about adding a second input to the switchblade and wiring it like so:
This way there is no FX on the unused amp input. Do you think this would work. I don’t have another jack to test.
That is essentially the same deal as the one I did, It wont make a difference to the noise level with one input or two. You shouldn’t be getting noise with the inputs grounded when not in use. I used to use a looper and I’d have a heap of noise effects on and when bypassed they would be silent. The way it works is that the channel you are not using grounds out, hence, canceling any noise.
Anyways, I done another diagram for you, this way you can ad a bi colored LED so you know which channels are being used. Try wire it like this (without the LED’s) I cant see why you would get noise if you re wire it exactly like this diagram, it does exactly the same thing as the other one I done but it just leaves room on the switch for an LED. NOTE: Make sure you have the 3PDT switch orientated correctly, it should be so the flat part of the lugs go horizontal, not vertical. I know EHX mounts them in around the wrong way on certain effects and some people think this is normal and they end up wiring it wrong.
I think I’m still getting hum because I’m grounding the input of the effect but the effect is still on and feeding the inputs of the amp.
That’s why I was thinking of adding the 2nd input to the switchblade and placing the switchblade right before the amp instead of before the last effect.
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