The Fettle Circuit The Wee Fettle Boost was the first circuit we worked on from scratch. It’s pre-Champion Leccy, when this whole thing was just an all-consuming hobby. We originally crammed it into a 1590A enclosure and only made a handful, back in the days when everything was handpainted. The Fettle Boost It’s a simple … Continue reading The Fettle Boost Vs. The Canny Fettle Boost