So, I was going through some slightly old stuff from a person's house that they didn't want, the only real stuff I was interested in was a small toolbox with a bunch of junk in it- caps, resistors, and all that fun stuff- and I found one of these. RadioShack® Audio Output Transformer - RadioShack.com I'm sure that's what it is, because I was in Radioshack just a week prior to seeing it in the box, and it is exactly the same, and it's the same thing as on the site. A few years ago I remember seeing a thread on some other guitar/bass/circuitry type site about using one of these as a tone choke, but after hours of searching, I can't find it. Looking at it sitting on the flat casing, wires sticking up, from left to right on one side is a green, black, then blue wire; on the other side is a red wire on the left, nothing in the middle position, and a white on the right. Could I use this as a tone choke like on an EB-3 or such? I don't know much about transformers, and inductors and all that mumbo-jumbo, so you'll have to talk simple to me if you want to help.