SARL 5 MHz propagation research project


Page last updated on: Saturday, November 1, 2014

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SARL 5 MHz propagation research project

The 5 MHz propagation research project show unexpected results.

One of the most interesting findings is the inconsistency in the results of Near-vertical-incidence sky wave propagation (NVIS).

Comparing a communications path between two amateur stations, ZS6KN and ZS6KTS (a distance of 51 km) it is interesting to note that in June 2014 there was a good communications path from just after 05:00 until approximately 16:30 after which the signals disappeared. The pattern for July was the same, but signals were considerably stronger than during August and September.

During September, a strong dip in signal strength can be seen. The other interesting observation from the graph is that propagation “opens” earlier and closes later as we go into summer which indicates variations in the ionisation of the D layer of the ionosphere as the sun rises earlier and sets later.

Not enough data has been collected to make any meaning full conclusions. If the path was a pure ground wave, the signals would have been more or less constant throughout the day and night.

The article will be published in the November/December edition of EngineerIT and is already available on the web. You can find the link on http://www.sarl.org.za, click on propagation research. You will find links to the article as well as a report of the first six months.

The South African Radio League

via SARL 5 MHz propagation research project.

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The South African Radio League (SARL) has found some unusual results from its recent test cycle of the 5 MHz band.  According to SARL officials, there was much inconsistency in Near Vertical-Incident Skywave Propagation (NVIS) and the discovery that 5 MHz “opens earlier and closes later as we go into summer…, indicating a variation in the ionization of the D Layer of the atmosphere.”  The SARL notes that is hasn’t collected enough data “to make meaning full conclusions.”

For the latest Amateur Radio news and events, please check out the blog sidebars.  These news feeds are update daily.

Aloha es 73 de Russ (KH6JRM).

Propagation Report from Hannes Coetzee, ZS6BZP | Southgate Amateur Radio News


Page last updated on: Saturday, October 4, 2014

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Hannes Coetzee, ZS6BZP

Propagation Report from

Hannes Coetzee, ZS6BZP

5 October, 2014

Hannes Coetzee, ZS6BZP, reports that the expected solar activity will be at moderate levels.

Sunspot AR2178 has a complex magnetic configurations and may produce M- class solar flares.

If you want to do your own frequency predictions, the expected effective sunspot number for the week will be around 88.

The 20 to 10 m bands will provide lots of DX fun with some exciting 10 m openings possible.

Please visit the website http://spaceweather.sansa.org.za for further information

South African Radio League

via Propagation Report from Hannes Coetzee, ZS6BZP | Southgate Amateur Radio News.

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I always enjoy the concise, accurate propagation forecasts from South African ham, Hannes Coetzee (ZS6BZP).  Hannes believes propagation “will be at moderate levels” with sunspot AR2178 producing “complex magnetic configurations” which “may produce M-class solar flares.”  Hannes says there should be good DX opportunities on amateur radio bands from 20 meters to 10 meters.

For the latest Amateur Radio news and events, please check out the blog sidebars. These news feeds are updated daiy.

Until next time,

Aloha es 73 de Russ (KH6JRM).

Antique Wireless Association AM and SSB Valve QSO Party | Southgate Amateur Radio News


Page last updated on: Saturday, October 4, 2014

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Antique Wireless Association AM and SSB Valve QSO Party

The Antique Wireless Association AM and SSB Valve QSO Party will be held over two sessions on Saturday 11 and Sunday 12 October 2014 between 15:00 to 19:00 CAT on each day.

The AM section will be held on Saturday and the SSB section on Sunday with phone activity on 40 and 80 metres.

The frequencies to use on 40 metres are 7 063 to 7 100 kHz and on 80 metres, 3 603 to 3 650 kHz. The exchange is your call sign, a RS report, a consecutive serial number starting at 001 and the type of radio used, e.g. HT37 TX.

If you are using an all valve radio, you earn 3 points per contact; using a Hybrid (valve & solid state) radio is 2 points per contact and using a Solid State radio is 1 point per contact.

The multiplier for an all valve radio is 3 points per contact; for a Hybrid (valve & solid state), it is 2 points per contact and for a Solid State radio it is 1 point per contact.

Certificates will be awarded to the first three places in each category – AM and SSB.

Submit your log by 31 October to the

Southern African Antique Wireless Association,

PO Box 12320, Benoryn, 1504.

Or by e-mail to  andyzs6ady[at]vodamail.co.za

The South African Radio League

via Antique Wireless Association AM and SSB Valve QSO Party | Southgate Amateur Radio News.

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This sounds like an exciting event sponsored by the Southern African Antique Wireless Association and the South African Radio League.  The SSB and “Valve” (tube) QSO Party is set for Saturday, 11 October 2014 and Sunday, 12 October 2014, between 1500 and 1900 hours Central African Time (CAT).  Depending on propagation and time of day, you can work South African stations on phone between 7.063 MHz to 7.100 MHz on 40 meters and between 3.603 MHz to 3.650 MHz on 80 meters.

For the latest Amateur Radio news and events, please check out the blog sidebars.  These news feeds are updated daily.

Until next time,

Aloha es 73 de Russ (KH6JRM).

 

ZS9HQ on-air from National Amateur Radio Centre – Southgate Amateur Radio Club


ZS9HQ on-air from National Amateur Radio Centre
Southgate Amateur Radio Club
The call sign ZS9HQ was assigned to the South African Radio League by ICASA and will be operated from the National Amateur Radio Centre during the IARU HF Championships.

Source: www.southgatearc.org

The South African Radio League (SARL) has activated call sign ZS9HQ for the IARU HF Championships this weekend (12-13 July 2014).  The station will operate from the National Radio Centre during the international event.  SARL President Geoff Levey (ZS6C) needs South African hams to run the station during the contest.  You can reach Geoff at:  contest@sarl.org.za.  Aloha de Russ (KH6JRM).

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