how would you handle this a/b switching?

thegnu · 15th January 2009, 04:32 AM

My amp doesn't have a switch for the clean and overdriven channels, but I love the amp's distortion. I realized a couple minutes ago that I could build an A/B switch for the amp, but there are a few things that I'm not sure about.

I need to run cables to both channels from the A/B box, but I need to have the A/B box on my pedal board. This means either:

1. I run two cables from A and B
2. I wire A and B to a single, multiconductor cable.

If I choose 1, I can just tape the cables together. If I choose 2, I can either run the multi-conductor cable to a splitter box duct taped to my amp, or split the actual cable and solder two mono ends onto it.

How would you do it? I'm thinking 1, run the two mono cables, just because then, one cable can go bad, and I'm still relatively good. Plus, replacements are cheap and ubiquitous. This is the best thing to do, right?

Thanks for any input.

Khron · 15th January 2009, 06:00 AM

A(nother) simple way you could do that would be to use some CMOS switching. I have a schematic / board made in Eagle at home (i'm at school right now). I could upload some screenshots, in case you're interested.

I'll get back to you on this a bit later.

Chris

Khron · 15th January 2009, 07:24 AM

OK, just got back home.

The circuit i have is for a "true bypass" thing, but it's easily modifiable to do A/B switching.

Geek · 15th January 2009, 09:34 AM

What about a passive "A/B/Y" stomp?

Cheers!

thegnu · 16th January 2009, 01:10 AM

Thanks for the feedback. I'm probably just going to make a passive A/B switch that lights up when the distortion channel is selected. I think running two regular mono cables is the best thing, since if one fails, I've got a backup. I'll probably just duct tape them together, or use heatshrink tubing or something.

Thanks again.

15th January 2009, 04:32 AM	#1
thegnu diyAudio Member Join Date: Jan 2009	how would you handle this a/b switching? My amp doesn't have a switch for the clean and overdriven channels, but I love the amp's distortion. I realized a couple minutes ago that I could build an A/B switch for the amp, but there are a few things that I'm not sure about. I need to run cables to both channels from the A/B box, but I need to have the A/B box on my pedal board. This means either: 1. I run two cables from A and B 2. I wire A and B to a single, multiconductor cable. If I choose 1, I can just tape the cables together. If I choose 2, I can either run the multi-conductor cable to a splitter box duct taped to my amp, or split the actual cable and solder two mono ends onto it. How would you do it? I'm thinking 1, run the two mono cables, just because then, one cable can go bad, and I'm still relatively good. Plus, replacements are cheap and ubiquitous. This is the best thing to do, right? Thanks for any input.

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15th January 2009, 06:00 AM	#2
Khron diyAudio Member Join Date: Jul 2005 Location: Finland	A(nother) simple way you could do that would be to use some CMOS switching. I have a schematic / board made in Eagle at home (i'm at school right now). I could upload some screenshots, in case you're interested. I'll get back to you on this a bit later. Chris

15th January 2009, 07:24 AM	#3
Khron diyAudio Member Join Date: Jul 2005 Location: Finland	OK, just got back home. The circuit i have is for a "true bypass" thing, but it's easily modifiable to do A/B switching.

15th January 2009, 09:34 AM	#4
Geek diyAudio Member Join Date: Sep 2004	What about a passive "A/B/Y" stomp? Cheers!

16th January 2009, 01:10 AM	#5
thegnu diyAudio Member Join Date: Jan 2009	Thanks for the feedback. I'm probably just going to make a passive A/B switch that lights up when the distortion channel is selected. I think running two regular mono cables is the best thing, since if one fails, I've got a backup. I'll probably just duct tape them together, or use heatshrink tubing or something. Thanks again.

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