Join live broadcasts at VK5RHO the last Sunday of each month at 3.30pm 146.850MHz -600kHz offset 91.5Hz tone
Development of the Thermionic Valve
Development of Resistors, Capacitors and Inductors
Development of RF Feedlines, Coaxial cable and Baluns
Development of Microphones and Speakers
Submarine development
GPS & Doppler
