With low sunspot activity, higher frequencies don’t ... is that right now HF ham radio is on the brink of disaster even without FT8. The bands are bad and with antennas restricted, there isn ...

Somehow [hvde] wound up with a CB radio that does AM and SSB on the 11 meter band. The problem was that ... parts that dealt with the intermediate frequency at 7.8 MHz. Even the transmitter ...

Because mmWave bands are much higher-frequency than bands used for 4G and 3G, they do not reach as far, nor as well through solid objects. A typical mmWave base station ("tower") only covers one ...