It is routinely monitored by any number of radio amateurs and is likely to result in a response when calling CQ or Mayday or SOS. A calling frequency list includes not only the modes but adds specific activities expeditions, power levels as commonly practiced. If you regularly use 1. Be aware that the national calling frequency for whatever mode and activity is only a place to start communicating. Protocol and common courtesy require that once contact is established, you move to another frequency QSY to leave the calling frequency open for others to use.
Simplex Frequencies | Bruin Amateur Radio Club at UCLA
This frequency is often used when mobile on long trips in unknown repeater coverage areas. They can be very congested and may be used by other services! Radio transmissions at these frequencies are usually limited to "line of sight" between station antennas. Some factors involved in the blocking, or attenuating the signals are tall buildings with lots of metal in them, high hills, mountains, local "ground clutter" near you with a combination of everything mentioned above. Antenna Height above average terrain means everything!!! One of the most important things you can do to help increase your "range" and extend the "radio horizon" is to increase your antenna height above average terrain within your station limits.
National Simplex Frequency November 24, , There was a group of frequencies, 1 frequency on each band, atleast 1 call frequency and atleast 2 frequencies but for each of the 2 on the same frequency that required the radio to either use FM and SSB to make that contact.