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SARL Today HF Update with ZS4BS VHF/UHF News with Mike Bosch ZS2FM Contest News with Geoff ZS6C SARL Forum current topics Commercial Hamads


AMSAT SA SPACE SYMPOSIUM YOU CAN STILL REGISTER  now at a 50% discount if you register today- The AMSATSA Space symposium on 27 May 2017 promises to be one of the most exciting events on this year’s calendar.   AMSATSA secured another sponsor which allows us to offer a 50% discount if you register by midnight Thursday 26 May. 
Learn how you can operate on the new geostationary satellite to be launched later this year giving South Africans 24 hour communication with a simple put together ground station. Hannes Coetzee ZS6BZP has done the work and will share it with you.  Denel Spaceteq will share details about their work on the EO-Sat1 satellite being built for SANSA to become part of the African earth observation satellite network. 

Anton Janovsky will show you and demonstrate how to build a SDR with a Raspberry Pi. Find out how the Kletskous project has progressed including a demonstration of the transponder and other sub-systems plus many more interesting discussions and demonstrations. There are awesome attendance prizes to be won including two Pi Top laptops, 2 Raspberry Pi starter kits and 2 Raspberry Pi dummy kits, a MFJ artificial ground and a MFJ world receiver. Full programme and registration details click here or request details by sending an email to

SARLNEWS: AMATEUR RADIO TODAY - listen to these programmes on line or download to retransmit on local nets, a SARL service to Radio Amateurs. 

Sunday 21 May 2017

SARLNUUS is nie beskikbaar nie

SARLNEWS with Rory Norton  download/listen here

AMATEUR RADIO TODAY with Dawie Conradie ZR6DHC, listen here  or visit the Amateur Radio Today page with more details and download links  here

Microsoft to the rescue of XP Users to combat WannaCrypt - Microsoft has taken the unprecedented step of issuing patches for unsupported operating systems - like Windows XP - in the wake of the massive WannaCrypt ransomware attacks against organisations across the globe.

Businesses, governments and individuals in 74 countries across the globe have been victims of more than 45,000 attacks by this one strain of ransomware in the space of just a few hours. Wannacrypt ransomware demands $300 in Bitcoin for unlocking encrypted files - a price which doubles after three days. Users are also threatened with having all their files permanently deleted if the ransom isn't paid in a week. Cybersecurity researchers have suggested the ransomware attacks are so potent because they exploit a known software flaw dubbed EternalBlue.  This Windows flaw is one of many zero-days which apparently was known by the US National Security Agency (NSA) before being leaked by the Shadow Brokers hacking collective. Microsoft released a patch for the vulnerability earlier this year - but only for the most recent operating systems.

One thing many of the targets have in common is that they're running old Windows operating systems like Windows XP, Windows 8 and Windows Server 2003, which now only usually receive patches if the organisation using them are receiving special custom support. However, in order to ensure as many systems as possible are protected against WannaCrypt ransomware and other attacks, Microsoft has made security patches for Windows XP and other operating systems broadly available to download.


Update your e-mail address - Kelley at the NARC asks that SARL Members will check and update their e-mail address. Kelley receives about 55 bounced e-mails each time a SARL Communication is sent out.

Go to your call book entry and update that e-mail address today!


PAY YOUR AMATEUR RADIO LICENCE NOW -   Your 2017/2018 licence is payable on 1 April 2017. The fee is R134.00.  The fee is for 5 years is R559.00. Advise Dewald  at of your payment for a five year license. 

ICASA is not oblighed to send out invoices.  When paying your licence  by EFT or at the  Post Office please use your licence number and callsign as reference. Send the payment advice to the following two addresses and copy to The ICASA bank details are as follows:  ICASA, Nedbank,
Branch code: 146 245, account number 1462002927

ICASA automatically  cancels all licenses that are not renewed within 30 days of 1 April. Failing to pay in time  will mean that you may have to apply for a new license. You may just find that some else has applied and obtained your callsign. 


NVIS PROPAGATION  - UNDERSTAND THE  BASICS - Radio Communication via Near Vertical Incidence Skywave propagation  can be used for communication over a wide area. It is very well suited for emergency communication. It uses frequencies between 3 and 10 MHz with amateur allocation in the 5 MHz particularly attractive.  Two propagation researchers, Ben Witvliet  and Rosa Ma Alsina-Pages wrote an interesting paper with lots of reference to  other papers for additional reading.

You can download it here


4 Bursaries available for under 26 to study for class A -  If you are under 26 and planning to study for  the Class A amateur radio examination there are bursaries available.. For more detail and application forms click here


RSGB HANDBOOK NOW AVAILABLE IN SA- The new RSGB Radio Communication Handbook is now avaiable in South Africa. Also available are the ARRL 2017 Handbook (hardcover version) and Low Band DXing. For a list of books locally stocked and a mailorder from click here. SARL Members get up to 10% discount .

Advertising in Radio ZS and the SARL Web site

Radio ZS and the SARL web welcomes advertising. It is a source of information for readers. To place an advertisement in Radio ZS, contact Dennis, ZS4BS, at To advertise on the League web site, contact Hans, ZS6AKV at

Advertising Rates

Display (cameo) on home page - R500 pm - R2 500 for 6 months - R4 500 per annum

Commercial Hamad on home page - R60 pm - R300 for 6 months - R500 per annum

Radio ZS Strip advertisement, 10 cm x 2 columns on top of the page - R100 pm - R500 for 6 months - R1 000 per annum

Display (cameo) on home page and Radio ZS Strip advertisement (as above)       - R550 pm - R2 700 for 6 months - R4 900 per annum 

Terms and conditions

All contract advertisements content may be changed monthly on 5 working day notice

The rates are based on the complete supply of material in Jpeg unless otherwise negotiated. For artwork additional charges may apply as agreed

The content of the advertisements must comply with regulations and norms acceptable in South Africa

All advertisements are playable in advance by EFT to SA Radio League, ABSA, account no 4071 588 849 branch code 632 005

All correspondence and material must be sent to with a copy to

HF Update with Dennis, ZS4BS 20 May 2017 

Get your weekly copy of HF Happenings at

Kenya, 5Z. Thomas, OZ1AA is active as 5Z4/OZ1AA from Kenya until 15 June. He plans to visit Lamu Island (AF-040) between 25 and 29 May. QSL via Club Log's OQRS and LoTW, or via OZ1ACB.

Rwanda, 9X. Alan, KE4TA is moving to Kigali, Rwanda for two years.  He departs on 26 May, but it will take a while for him to get his 9X licence and have his station up and running. He will be active on 80 to 6 metres ("primarily on 20 and 17 m") SSB, digital modes and CW “when my skills are better". QSL via N4GNR and LoTW.  Updates will be posted to

Maderia, CT9. Look for Serge, CT9/R7KW and Oleg, CT9/YL3JM to be active from Madeira Island (AF-014) between 25 and 28 May, including a Multi-Single entry in the CQ WW WPX CW Contest as CT9/R7KW. QSL for both call signs via Club Log's OQRS, or direct to K2PF.

France, F. Special callsign TM500LH will be active between 25 and 31 May and again on 5 and 10 July to celebrate the 500th anniversary of the foundation of the city and port of Le Havre. QSL via F6KOH.

French Polynesia, FO. Jean-Pierre, F6CTF will be active as TX5X (also /mm) from the Leeward Islands and the Windward Islands, French Polynesia between late May and early August. He will be active on 80 to 10 metres SSB, CW and JT65.

Aruba, P4. DF4XX, DL4HG, DL7AT and DL8UD will be active as P40X from Aruba (SA-036) from 22 July to 5 August. They will participate in the IOTA Contest. QSL via DL8UD, direct or bureau; the log will be uploaded to Club Log.

UR     - Special callsign EO25P will be active from 1 June to 31 December to celebrate the 25th anniversary of the Volyn Amateur Radio League. See for information on the certificate available for contacts made with EO25P and other EO25 stations.

Canada, VE. The Frontenac Amateur Radio Club will operate special event station XM3CARF from 3 June to 3 July to celebrate the 50th anniversary of the founding of the Canadian Amateur Radio Federation. QSL via operator's instructions. Canada's first successful national amateur radio society, CARF existed between 1967 and 1993, when it was amalgamated with the Canadian Radio Relay League to form the Radio Amateurs of Canada.

Zimbabwe, Z2. Tom, KC0W had to cancel his 8R1/KC0W operation from Guyana owing to problems in getting a licence. His new destination is Zimbabwe, where he will be active as Z25DX from 23 May to 18 June. He will operate CW only on 80 to 6 metres.  QSL via KC0W (direct only) and log search on Club Log. He does not use LoTW.

Albania, ZA. Martti, OH2BH and Pekka, OH2TA (OG1N) will be active from their recently built DX-station at Durres, Albania between 23 and 30 May. Look for ZA/OG1N to participate in the CQ WW WPX CW Contest as a Single-Operator All Band entry. Outside the contest, they will operate mainly SSB. Martti will then travel to Kosovo and be active as Z68BH. QSLs via home calls.

Albania, ZA. Henning, OZ1BII will operate CW only as ZA/OU2I from Albania between 25 and 29 May, including an entry in the CQ WW WPX CW Contest.  QSL via Club Log's OQRS, LoTW and eQSL.

VHF+ UHF+ MICROWAVE NEWS by Mike Bosch ZS2FM 21 May 2017 


LIGHTNING SCATTER PROPAGATION – Rickus De Lange, ZS4A, had an interesting experience at 05:20 CAT on Saturday morning (13 May) when he fired up his 2 metre station in a cold Bethlehem and waited for the Gauteng guys to wake up. He listened to the band on USB and also fiddled on the Internet, and heard static discharges on the frequency of 144,300 MHz that he got used to after a while. When Carl ZS6CBQ came on and turned his beam to Welkom Rickus could not hear him at all, normally he hears Carl weakly when he is aiming at Welkom. Suddenly he heard “ba – ba” sounds on the frequency, and later on he could hear audio too but it was very fast. Rickus was very surprised as it was the first time that he experienced it, and later could pick up complete words from Carl and even recognize his voice. 

This phenomenon is Lightning Scatter propagation, where a lightning discharge ionizes the air and reflects short radio bursts on 144 MHz. This is similar to the meteor trails that also create radio bursts, but both Lightning Scatter and Meteor Scatter can produce very much longer radio bursts on the lower VHF frequencies. Many years ago Lightning Scatter was observed during a distant thunderstorm that raged between East London and Durban. Every time a distant lightning flash occurred the Durban FM broadcasting station popped out of the noise to full quieting, and lasted for about ten seconds before it faded out. This unusual phenomena continued uhtil the thunderstorm drifted away. 

So keep an eye on vacant spaces on the FM band during thunderstorms, or during major meteor showers, or for Sporadic-E openings that could yield strong signals from distant FM stations for half an hour or longer. Try and arrange a QSO on 50 MHz Lightning Scatter, but you must be brief and quick and only call when you see the flash or hear the burst of static. 

A NEW VHF NET IS BEING PLANNED FROM PORT ELIZABETH – A new VHF net is being planned by VHF amateurs in Port Elizabeth to start during the warmer months, probably around August/September 2017. The net will take place on Thursday evenings on a frequency of 144,300 MHz SSB using horizontal propagation, and split into two periods. Period 1 beamimg north to cover Bloemfontein and Durban, and Period 2 beaming west towards Knysns/George area and Cape Town. The beacon ZS1MM on 144,410 MHz CW operated by Leon Korkie at Bredasdorp will be a good indicator of Tropo propagation on this VHF path. 

 METEOR SCATTER ON 432 MHz – OK1TEH locator JO70fd worked the following stations via Meteor Scatter during the Quadrantids meteor shower in January this year via MSK441. 

RD3FD locator KO95co – 1701 km.

R6CS locator KN95bw – 1818 km.

RN6MA locator LN06uo – 2042 km. 

OH1TEH is running about 700 Watts into a 23 element Yagi.


REVIEW OF FIRST GRAVITATIONAL WAVES DETECTED – When two galaxies collided, the merging of their central black holes triggered gravitational waves, which rippled throughout space. For the first time, scientists have observed ripples in the fabric of spacetime called gravitational waves, arriving at Earth from a cataclysmic event in the distant universe. This confirms a major prediction of Albert Einstein's 1915 general theory of relativity and opens an unprecedented new window to the cosmos. The gravitational waves were detected on Sept. 14, 2015 at 5:51 a.m. EDT (09:51 UTC) by both of the twin Laser Interferometer Gravitational-wave Observatory (LIGO) detectors, located in Livingston, Louisiana, and Hanford, Washington. 

Based on the observed signals, LIGO scientists estimate that the black holes for this event were about 29 and 36 times the mass of the Sun, and the event took place 1.3 billion years ago. About three times the mass of the Sun was converted into gravitational waves in a fraction of a second—with a peak power output about 50 times that of the whole visible Universe. By looking at the time of arrival of the signals, the detector in Livingston recorded the event 7 milliseconds before the detector in Hanford—scientists can now say that the source was located in the Southern Hemisphere.

At each observatory, the 4-km long, L-shaped LIGO interferometer uses laser light split into two beams that travel back and forth down the arms (more than a metre diameter tubes kept under a near-perfect vacuum). The beams are used to monitor the distance between mirrors precisely positioned at the ends of the arms. According to Einstein's theory, the distance between the mirrors will change by an infinitesimal amount when a gravitational wave passes by the detector. A change in the lengths of the arms smaller than one-ten-thousandth the diameter of a proton (10-19 metre) can be detected.



CONTEST NEWS WITH ZS6C Updated 7 April 2017 

South African Radio League QRP Contest: Aim: The QRP contests are intended to be fun activities to promote QRP operation be-tween radio amateurs. Dates and times: Autumn – from 12:00 to 15:00 UTC Saturday 8 April 2017. General Info: Modes: SSB and CW. Power: 5 watts (PEP) output or less. A station may be worked once per band per mode. Frequency: The first hour is limited to the 40 m band only, the remaining two hours the contesters are free to use any HF (non-WARC) band as they see fit. Comply with the contest-preferred segments as detailed in the general rules. It would be advantageous to use the standard QRP calling frequencies as the starting point.  Exchange: RS(T) and Grid locator.  See Blue Book for more details

JAPAN INTERNATIONAL DX CONTEST : OBJECTIVE: For amateurs around the world(DX) to contact JA stations in as many JA prefectures + JD1 islands as possible.  CONTEST PERIOD:  CW Start Sat. 0700 -Sun. 1300UTC. 2nd full weekend of April. BANDS: 1.8/3.5/7/14/21/28MHz (JAs on 1810-1825 & 1907.5-1912.5KHz). CONTEST EXCHANGE:  JAs   : RS(T) + Prefecture number(01 to 50) - Others: RS(T) + CQ Zone number.

The Yuri Gagarin International DX Contest:   Date: from 21.00 UTC on April 08th till 21.00 UTC on April 09th, 2017. Bands: 1.8, 3.5, 7.0, 14, 21, 28 MHz and radio amateur satellites. Modes: CW only. Contest Call: (CQ Gagarin Cup). Exchange: RST and ITU zone number.

HOLYLAND CONTEST: Date: Friday 14 of April 21.00UTC - Saturday 15 of April 2017 21.00UTC. Aim: To promote contacts between Radio Amateurs around the globe and Israeli Hams. Modes: CW; SSB; Digital; MIX. (Mixed = minimum 2 modes). Bands: 1.8, 3.5, 7, 14, 21, 28 MHz. Exchange: Worldwide stations send RS(T) + QSO number starting with 001. Israeli stations give RS(T) and 'Area'.

INTERNATIONAL YUDX HF CONTEST: Objectives: Developing traditional friendship between foreign and local hams. Contest Period: Third full weekend of April, from 12.00 UT Saturday to 11.59 UT Sunday (April 15-16 in 2017). Participants: Any licensed non-YU amateur radio station.

Bands: 80, 40, 20, 15, 10 meters under the recommendations of IARU Region 1. Modes: CW (A1A) and SSB (A3J). CQ calling practice: CQ YU or TEST YU. Contacts: Any participant with any participant. Only one QSO with the same station is counted per band and mode. Exchange: Non-YU stations: RS(T) + QSO number. YU/YT stations: RS(T)+County Abbreviation.

SPDX RTTY Contest:  Contest Period:   12.00 UTC Saturday , through 12.00 UTC Sunday. Bands:                 3,5 - 28 MHz without WARC bands. Mode: RTTY. Message: Foreign station  send : RST & QSO Number. (599001), Polish station transmits : RST & one letters denoting the province (B,C,D,F,G,J,K,L,M,O,P,R,S,U,W,Z ).,spdxrttyen.html

SARL Forum Active Topics
-=REBUILD=- : Mosley TA-33jr three element Beam  24/05/2017  22:44:32
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Abuse of SARL's Members by SARL 
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Commercial Hamads 


Direct importer of a wide selection of SWR meters, H.F., V.H.F. and U.H.F. base and mobile antennas. Amateur radio transceivers, antenna analyzers, etc. Affordable shipping costs for out of town customers and subsidized shipping to SARL members. Check out all my amateur radio goodies here. 0720268909.


Light Engineering Works

General engineering, part remanufacturing  turning, milling, drilling.Specialised welding of steel, stainless steel, aluminium and cast iron.Gear repair and remanufacturing.Prototype industrial and automotive  parts and brackets made to specification,  Heavy duty antenna support and Mobile brackets including standoff brackets and antenna parts manufactured.Tower and tower part repairs also undertaken. Contact Willie Wright ZS6WC.0823351356.


Place your commercial hamads on the home page.  Book a six months space for R300 or 12 months at R500 prepaid with order   The advertisements will be  text only up to 60 words including address, telephone number and click through URL to advertisers' website and email address. Adverisement can be changed  Send your contact details to and we will contact you or call the NARC at 011 675 2393

What is Amateur Radio ? 

Tell me more  about Amateur Radio

Radio Amateurs, or "Hams" use two-way radio communication to make contact with other radio amateurs all over the world. They are even able to use satellites and on occasion speak with astronauts. Radio Hams can do this from home or while mobile in cars, boats or on foot.

Radio Hams have a full range or communication modes at their disposal. These include plain voice, Morse code, numerous digital computer modes and even graphical modes like television. As a licensed amateur radio operator you will be able to join in experiments using all these modes.

mateur radio can be enjoyed by young and old, male and female, even the most severely disabled can make friends around the world from their own home. This hobby knows no boundaries.

Random Photo from the Call book.

 Jacques Martin Potgieter, ZS6JAX


CDS Advert 


 Click here to visit website 

Sam's Radio 


You can also call us on us 082-974-8248 or 084-585-8563 



To book and full programme  click here

This advertisement is sponsored by the SARL in the interest of the development of amateur radio

RF Design

Conical Technologies

 Click here to go to the Kevtronics web 

Worked All ZS award
An interesting operating goal

The entry level for the WAZS award is 100 different call signs. The programme has recently been expanded to include higher level endorsements, such as WAZS-200, WAZS-300, etc. Endorsements may also be obtained for specific modes, eg: CW, SSB, etc.
Click here for more information...

lboat034a.gif (1979 bytes)SA Maritime Net

The South African Maritime Mobile Net provides weather reports and maintains contact with sailing vessels from around the coast and high seas.
The net operates 7 days a week.

There are two regular schedule times as follows:

  • 06:30 UTC and 11:30 UTC on 14 316 kHz high seas net.
  • 06:35 UTC and 11:35 UTC on 7 120 kHz coastal net - the net lasts approximately 30 minutes .


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This page last modified: 16/5/2017