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index amsat sa registered as a non profit company registration 2016 111111 08 follow amsat sa on facebook https www facebook com amsatsa00 amsat sa p o box 90438 garsfontein 0042 south africa tel 082 78 1 4631 email admin amsatsa org za presentations weekly satellite news 23 august 2026 16 august 2026 august 2026 2 august 2026 26july 2026 19 july 2026 12 july 2026 5 july 2026 28 june 2026 21 june 2026 14 june 2026 7june 2026 31 may 2026 24 may 2026 1 7 may 2026 10 may 2026 3 may 2026 presentations and videos amsat sa space symposium 2025 presentations 23 august 20 26 now available amateur radio today is sundays 10 00 cat 7082 khz mondays 1 8 30 cat 3230 khz quick links about amsatsa application and renewal form sarl beacon amsat sa dual band yagi get order form here scroll down for more details on the yagi order now while current stock lasts new stock will be at a considerable higher price currently still at r450 amsat space symposium 2026 saturday 1 august 2026 videos available click here the hamsci personal space weather station development deployment and data amateur radio pico balloons sending data from near space itu and wrc 27 progress on amsat s golf tee foxplus a and foxplus b the quest of efficient powering of satellites more to follow radio amateurs take propagation forecasting to an amazing local level hamsci is developing a dashboard display specifically for amateur radio hf contesting dxing and general operations using data from the hamsci personal space weather station as well as potentially adding other local and remote real time data the hamsci personal space weather station is a multi instrument system designed to measure space weather for both scientific research and amateur radio operations the core of the psws is the rx 888 ka9q radio wsprdaemon grape high frequency hf software defined radio sdr capable of capturing and analysing signals across the 0 3 30 mhz range while most psws development efforts thus far have focused on strictly scientific objectives this project aims to make the data available and useful in real time for radio amateurs the dashboard has a goal of enhancing real time hf propagation assessments for amateur radio operators by decoding weak signal propagation report wspr spots and integrating with external space weather observations this dashboard will provide propagation insights on an individual station basis the dashboard will also contribute to a larger understanding of both localized and global hf conditions this should allow amateur radio operators to optimise their transmissions based on real time ionospheric conditions which can help improve contesting efficiency and dxing success currently this project is under development with a working prototype read the full article in hamsci newsletter here make meteor scatter communication your next amateur radio project with derek gravett zs5y have you ever imagined bouncing your signal off a shooting star as radio amateurs we don t have to rely on satellites or repeaters to reach distant stations sometimes the natural phenomenon of meteors blazing through our atmosphere gives us the perfect reflector this fascinating technique is called meteor scatter communication you can watch a recording of the webinar on you tube click here derek gravett zs5y will be introducing you to msk144 one of the most effective digital modes designed specifically for this purpose msk144 is part of the wsjt x suite developed by nobel laureate joe taylor k1jt it uses fast efficient minimum shift keying to capture those fleeting bursts of reflected signals from meteor trails bursts that may last only fractions of a second with this mode vhf and uhf operators can achieve contacts of 500 to 2 000 kilometres or more even when the bands seem completely dead in this presentation we ll explore how meteor scatter works why msk144 has become the preferred mode for modern operators and the practical setup you need to start making your own cosmic contacts by the end you ll see how a simple meteor can become your best friend on the airwaves donate to the amsat sa satellite fund enter the amount you wish to contribute in rand amount amsat sa responds to amsat dl request for expression of interest rfei amsat dl in conjunction with the european space agency esa invited amsat organisations to participate in their future geo initiative esa amsat sa on friday last week responded to the amsat dl rfei with some interesting ideas for the past few monday evenings discussions were held on the amsat sa webex video conference platform resulting in interesting proposals beside recommending that an uplink on the 4 7 ghz be considered in addition to the current oscar frequencies to increase the available bandwidth the proposal also includes an innovative system that will operate on a similar basis as echo link but on the proposed new geostationary amateur satellite currently some development has started of which the outcome will be presented at the amsat sa space symposium to be held on saturday 2 august another amsat sa proposal a ground based system to link leo satellites with the new geo satellites that will give repeater users access to the geo satellite and other amateurs operating within its footprint the eso and amsat dl initiative is a direct response to increasing global interest in amateur satellite communications and aims to inspire new generations through access to space based amateur radio platforms you can followed elopement on www amsatsa org za previous conference presentations presentation by dr gary immelman zs6yi view here africube challenging the limits presentation by anton janovsky zr6aic watch here amsat sa dual band 70cm yagi mark iii amsat sa has launched mark iii of is dual band 70cm 2m handheld beam antenna with a new easier to hold handle and improved coaxial terminations the yagi has been retuned for maximum performance in the amateur radio 2 m and 70 cm satellite bands the coax cable is terminated crimped brass lugs instead of being soldered making it environmental more robust the driven element has been adjusted to accommodate the change in the connection more about the yagi the antenna has a 50 ohm designed driver the yagi has a unique element called a open sleeve which is a director very close to the driven element the driven element is sized for 2m when operating on 70cm the open sleeve acts as part of the driven element on 70cm third harmonic of 2m the original concept was developed in 1946 by dr j t bolljahn of the stanford research institute but was not introduced into amateur radio until the 1950s the amsat sa version is based on a design by dk7zb with modifications by wb5cxc the first south african version was a collaboration between guy eales zs6guy and dr gary immelman zs6yi it was developed for yota 2018 where young people successfully used the antenna operating satellites using hand held transceivers the mechanical structure was redesigned by dr gary immelmann zs6yi a choke around the boom was added to isolate the antenna from the coax and reduce the effect human contact has on the antenna a handle was added on the boom end which makes it more comfortable to hold and further isolates the antenna from the handler the amsat sa yagi is manufactured in one of dr immelmann s factories in vereeniging it has two elements on 145 mhz and 3 elements on 435 mhz for its size the antenna has excellent gain 145 mhz 4 12 dbd or 6 3 dbi 435 mhz 6 23 dbd or 8 4 dbi the yagi is broadband with measured swr as follows and almost flat over the entire bands the antenna is plug and play no tools are needed except for soldering on a connector to suit the application it comes complete in a carry bag with full instructions this antenna can be assembled and dissembled in minutes the price of the mkiii yagi is r450 for amsat sa and sarl members non members pay r500 the courier charge is r150 postnet to postnet ask for a quote for other courier options get order form here amateur radio today a weekly one hour radio programme about amateur radio swl electronics and technology artoday 23 august 2026 artoday 16 august 2026 previous programmes sarl news 23 august 2026 english afrikaans sarl next generation beacon crowd funding current fund r30 400 visit the sarl beacon page here beacon the sarl has provided funding for the first beacon however the project will have to rely on crowd funding to accelerate the project amsat sa has launched a crowd funding project on behalf of the sarl vhf work group contributions can be made by clicking on the pay button for r50 r250 or r1000 your contribution is appreciated and will be acknowledged r50 r250 r1000 00 thank you you c an make it happen amsat sa supports sarl next generation beacon project vhf and uhf radio propagation remains a mystery even tropospheric and sporadic e propagation are not fully understood with new long distance communication distance records being broken the enquiring nature of radio amateurs has over many years resulted in informal research with setting up beacons and monitoring signals but this hand to mouth way of doing this has not really delivered the kind of data to make meaningful and scientific findings all it s really is showing is that long distance communication of frequencies above 30 mhz is possible and does regularly occur the answer to the conundrum is to set up a reverse beacon network to monitor beacons reverse beacon monitoring has always been a major requirement for monitoring a beacon and has been discussed over the past two plus years at various workshops arranged by the sarl and amsatsa the initial outcome of these deliberations was to monitor cw beacons using software like cw skimmer but experience gained through actual testing has shown a number of flaws with this approach the major flaw is that cw skimmer software is not 100 reliable when it comes to decoding it requires a fairly strong signal before the software actually begins decoding the received cw signal aural reception of a weak cw signal can already take place way before the skimmer software starts to decode the signal these findings encouraged members of the sarl vhf work group to start experimenting with digital modes like ft8 and js8call on vhf and uhf and they found that the reception and reporting of the signals heard could take place at very low levels this therefore seems to be a much better solution for a beacon than continuing with a traditional cw beacon get the full story here