HF welding / RF welding machine GGP

ULF BAND Receive Ferrite Core Loopstick Antenna for SOUND CARD INPUT - LIVE DEMO with QRQ CW example

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

Ferrite rod for the win !

ZSHC Induciton HF welder same design with THERMATOOL

What do I need in order to build and test a ferrite rod antenna for a specific frequency?

Afgnistn . news . old Radio Am mw . Ferrite Rod sw Recepton