: hi, : can anybody tell me something about my "orange gro 100"?? Noone seems to know anything about this amp. : I bought it few weeks ago in a hifi-store …!! : thanks for any response : dirk seidel Hey, I’ve got one too, and ditto- no one seems to know anything about it. I Do know that when working, it sounds amazing. i bought mine for about £200 3 years ago and its been "on the shelf" for about half that time! Mine seems to have a mains loop which busts the fuses/valves, but i’m trying to fix it at the moment, possibly adding a clean output stage in the process. What i really need is an electrical wiring diagram to have a go. Let me know if you find anything useful… Cheers! Andrew