Making my own A/B Box

[StratMatt22]

Hey I just have a simple question about building my own.

Im going to use these instructions here

http://www.fulltone.com/PDfFiles/AB_switcher.pdf

Im not an expert with electronics but this looks simple enough. The only thing that is puzzleing me are the 2.2k and 10k 1/4 watt resistors. What does this mean? They are not listed in the required parts? Or are they even parts? Haha sorry like I said Im not much of an electronics guys. I just replace my own pickups from time to time.

Also if there is anything else I should know about this before I proceed I'd appreciate it!

Thanks!

 

[Artie]

Re: Making my own A/B Box

Those are the current-limiting resistors for the LED's. If you leave them out,
the LED's will glow real bright . . . for about a half a second.

btw - That design is probably ok. I assume that Mike Fuller knows what he's doing, but I'm surprised that it shares the grounds on the amps. This might cause a ground loop problem. Here's a simple design I came up with some time ago:

This one shorts the unused output and isolates the grounds. The down-side is, I don't have LED's on this one. That could be important to you.

 

[the guy who invented fire]

Re: Making my own A/B Box

That A/B box is the way to go...I built 2 for a friend of mine a while ago and they are killer...I actually about to have to build 2 or 3o for myself!

 

[cvansickle]

Re: Making my own A/B Box

Fuller's design claims that the noise from pedals left on on the unused output is eliminated. That's not true. High gain pedals, like fuzzes and distortions, still hiss and hum.

 

[StratMatt22]

Re: Making my own A/B Box

Well Im just splitting my guitar signal between my amp's main input and my gnx4 which goes into the poweramp.