Hey everyone, I'm a newcomer here but I've gone through many of the forums and I can't find an answer to some questions I have. I just built a 5F2a clone that follows the schematic pretty much exactly except for the addition of an impedance selector (4, 8, and 16 ohms). I'm using a hammond 1760C output transformer and a hoffman impedance switch. I'm wondering how to connect the transformer to the switch and then to the output jack. More specifically, where does the negative feedback loop tie into the switch at? My second pertinent question is can I increase the fuse rating to 1A? I'm using a 5F2 Pts power transformer if that helps. Any information would be much appreciated. Thanks!!!