No, its not the tube coil yet, but it is my 4.25x20" tc. i got 10" streamers in air from a brakout point in a pot lid. If the cap hadnt died on me ide still be playing. Im going to hunt for a bigger nst and materials for a plate cap. P.S i think ill start on my tube coil today. first going to try a 2x 6" on on 801A tube. Perhaps ill try a 811 later.