ZS 144MHz NEWS
COMPILED BY BARRY ZR2DX
AN EXCITING TROPO SEASON AHEAD FOR VHF AND UHF
Regular temperature inversions could occur from now on until autumn next year, producing optimum Tropo conditions on VHF and UHF, thus making long distance contacts possible on both the analogue and digital modes.
Countrywide contacts are also possible on both SSB and FM during Tropo openings on VHF or UHF. So keep an eye on the barometer and weather reports or watch the VHF beacons and FM stations or repeaters within range. Tropo openings from Port Elizabeth can be detected by monitoring the ZS2VHF beacon on 144,415 MHz FSK. Its horizontally polarized signal has been heard in all six divisions of the RSA via Tropo propagation. This beacon can also indicate band openings on 432 and 1296 MHz.
Since the 2-metre band is the most effective on Tropo propagation, look for SSB signals on 144,200 MHz or try the Digital modes around 144,260 MHz. Alternatively, tune in to the national FM "DX" channel on 144,400 MHz in the evenings between 19:00 to 21:30 SAST and listen for other divisions. On Saturdays and Sundays several Hams in East London and Port Elizabeth are monitoring this channel all day long for any possible long distance openings. If you do hear the ZS2VHF beacon then please give a call.
All you need to start with on VHF or UHF is a horizontally polarized Yagi antenna - the bigger the better! A low noise pre-amplifier and a linear power amplifier could be added at a later stage as desired. Try it on your favourite band and transmission mode and enjoy the excitement and challenge of long distance simplex communication - the real amateur radio! For more information on Tropo see the September/October 2002 issue of RADIO ZS.
If you have any items of interest relating to 144Mhz operations please EMail the details to [email protected]