Guyatone FLIP200FJ Junk I am selling this as I organize my equipment. The clean channel has a beautiful sound, typical of a vacuum tube. The drive channel distorts well. (It feels like it distorts too much.) Each function works without problems. Since it's old, there may be some crackling. Please judge the appearance from the photos. *The reason for being junk is that it oscillates after running for about an hour. (A high-pitched whine) I don't think there's any pattern to the time it takes to oscillate. I am not familiar with electrical knowledge, so I don't know any more than this.