How To Build Constructive Feedback Coils

00:00 - Start 00:49 - microphone feedback example 01:12 - dual resonant feedback works different 01:35 - Q factor 01:47 - TWO PVC PIPES 02:56 - Pitch 05:55 - matching the PITCH 07:39 - first turn 07:47 - first return 09:08 - building the coil 10:16 - a new day of rolling 14:42 - half way done 15:09 - switched to 0.5mm diameter 15:33 - day 4 of winding 15:56 - day 5 continue with 0.5mm diameter 16:22 - HV coil finished 16:45 - photos 16:55 - inside coils, high current and output 17:09 - the layers 18:17 - the high current coil 18:26 - pitch for the output coil 19:54 - support this research