Posts tagged as propagation

Exploring long distance VHF communication

During the years in the eleven-year cycle with high sunspot numbers, we have often seen the maximum usable frequency rising above 145 MHz and resultant very high frequency (VHF) long distance (DX) contacts being made over distances in excess of 3000 km. This, however, does not mean that during the rest the 11-year cycle DX […]

Solar eclipse and propagation: More questions than answers for now

In August 2017 more than 600 000 radio amateurs, mainly in the USA, took part in a Solar Eclipse QSO Party (SEQP) in a coordinated initiative to research the possible influences of an eclipse of the sun on radio propagation. The solar eclipse caused a shadow of the moon traversing the USA from Oregon to South […]

Bloemfontein 5 MHz beacon enhances the SARL propagation research project

  The South African Radio League (SARL) propagation research project is based on a number of automated beacons using a program called “Weak Signal Propagation Reporter” (WSPR). During July 2015 the scope of the project was greatly enhanced when a beacon was installed in Bloemfontein. For the past few months the focus was on short […]

Propagation research on 5 MHz produces some interesting results

  Hans van de Groenendaal, ZS6AKV, South African Radio League Propagation research undertaken by radio amateurs on 5 MHz showed some early and interesting results using the weak signal propagation reporter software (WSPR) . Almost a year ago the South African Radio League (SARL) obtained a licence from the Independent Communications Authority of South Africa […]

Studying propagation

by Hans van Groenendaal, features editor, EngineerIT In this monthly feature, Hans van de Groenendaal ZS6AKV, executive chairman of the South African Amateur Radio Development Trust (SAARDT), looks at various technologies and activities that drive amateur radio. SAARDT is dedicated to the development of amateur radio in South Africa with a special interest in the […]