630m (472 kHz) - 10 m (29 MHz) antennas, propagation, operating, etc
25 / 133Magic band discussion - antennas, propagation, operating, etc
24 / 1052m & 70cm discussion - antennas, propagation, operating, etc
22 / 15023cm, 2.4/3.4/5.7/10/24/47 GHz and above - antennas, propagation, operating, etc. Includes Optical communications, with light,
69 / 255Non band-specific propagation & Solar Cycle discussion
24 / 92