12 AC Rough 19

Interesting Phenomenon with copper bar and ferrite ring cores

15 db of extra VLF SIGNAL GAIN using a 2nd tuned "passive" FERRITE CORE COIL VLF RX antenna

DIY 50 watt high power audio transformer using a FERRITE ROD COIL primary & FERRITE BOBBIN CORE ends

finished running oscillator. 6 magnet ferrite rod.

DIY 60 watt high power audio transformer using a FERRITE ROD primary & 2 FERRITE BOBBIN CORE 2ndary

ZSHC Induciton HF welder same design with THERMATOOL