Archive for March, 2009

Relay Control Box for Turnstile Antenna

Presented is a relay controller for operating two orthogonal 75m dipoles to make them operate as a circular polarization turnstile antenna.

NVIS 80m with 160m Full Wave Loop is less than ideal

Big HF loop antennas provide great performance, but they can’t do everything. 160 meter full wave loops won’t work well for NVIS when used at 3.8 MHz.

Sharing the Radio’s CAT with Multiple Applications

Can free utilities allow multiple software applications access to the same serial port at the same time? Yes they can.