flyback cooling

[DaveWM]

after reading up on that patent, I decided to try another experiment. this time I have some thick cardboard slid in between the shunt and the fly. I had noticed in the past that the top part of the fly was the hottest, which also happens to be closest to the shunt. Perhaps radiant heating is in play, so will see if this helps. The patent shows separation between the shunt and its own cooling slots away from the fly, keeping the fly in a sealed fire proof box.