using a resonant tuned FERRITE ROD loopstick antenna to audio filter & listen to CW using headphones

finished running oscillator. 6 magnet ferrite rod.

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

12 AC Rough 19

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

ZSHC Induciton HF welder same design with THERMATOOL

138,000 times per second on the ferrite rod. But the magnet donut might actually work !