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All the facilities available on this website are free and available to all D.A.R.C.club members and non-members alike. We welcome your comments and suggestions.
Allways Refresh this page by pressing "Ctrl-F5" to ensure you see the latest updates.
All the facilities available on this website are free and available to all D.A.R.C.club members and non-members alike. We welcome your comments and suggestions.
Allways Refresh this page by pressing "Ctrl-F5" to ensure you see the latest updates.
Geomagnetic
Field: 
From: n3kl.org (10 min updates) Click on the above pictures and visit www.spaceweather.com and www.spaceweather.co.za for more info on space weather and how it affects us.
VHF Aurora:
144 MHz E-Skip in Europe: 
144 MHz E-Skip in North America: 
From GoodDX.net
| Home Club History About "Ham" Radio Electronic Tutorials Club Activities Committee Projects and Kits Contests Bulletins and Ham Magazine CQ Newsletter Repeater Links Swap Shop Guest Book Contact Us The South African Radio League  |
Worldwide
Ham News. Latest news
from around the world from the Southgate
ARC web page.
Mouse-over for textbox description of each link. Greetings fellow hams New venue for the "Swap Shop" and club functions. There is ample free and SAFE parking in line of view of the venue. Map and directions : View DARC Flea Market @ The Dutch Club in a larger map Directions from Pinetown area driving down the M7; from north exiting the BLUFF exit, and from Durban exiting the highway at bluff exit: Follow EDWIN SWALES DRIVE to junction of BLUFF ROAD turn LEFT into BLUFF ROAD stay in right hand lane. At the ROBOT turn RIGHT into OLD MISSION ROAD drive up to CIRCLE and keep LEFT into BIDVELD ROAD drive down hill to T-JUNCTION turn RIGHT into TARA ROAD. After 50 meter turn left into DUTCH CLUB parking lot (flea market signs are displayed) Directions from south: Exit highway at JACOBS exit. Turn right and follow QUALITY ROAD through JACOBS INDUSTRIAL AREA (there are no twists and turns in Quality road) drive up and down the hill to crossing with TARA ROAD. TURN LEFT and follow road to JUNCTION GRAYS INN ROAD (Hill shopping centre at the right) TURN LEFT INTO GRAYS INN ROAD and at 1st ROBOT RIGHT INTO TARA ROAD follow TARA ROAD to DUTCH CLUB turn RIGHT into Parking lot. Should you manage to get lost, phone me at 0764564200 for directions. If you have any queries don't hesitate to contact me by all above mentioned means of communications. 73 de Kurt Secretary DARC Digital Modes, Software and the Club CD There have been requests for the club CD again recently. If you would like to order one for delivery at the next Meeting or Swap-Shop contact Dave ZS5LPT and have your call put on a disk. SMS Dave on 083 736 6935 or email via the club email. The club CD has nearly all of the software you would require for working digital modes, antennae design and much more. In total there is 700MB of Software on the CD. The cost of the CD is a R 10.00 donation to the club. All proceeds from the sales are donated to the club. Another use for your GPS Your GPS can be use for more than just APRS. Get the whole family involved in a little adventure. There are hundreds of little treasure hunts around This page can now be translated into German, Spanish, French, Japanese, Italian and Portuguese by clicking on the appropriate flag. |
Club
Facebook page A DARC facebook page has been set-up. Feel free to add pictures and do the facebook thing. Follow the link: http://www.facebook.com/group.php?gid=209621312845&ref=nf Links to items heard in the Sunday Bullettin and other intersting stories  Radio depends on propagation and in order to use the all the information available you need to have a basic understanding of how it all works. In the earth’s atmosphere, particularly a region extending from a height of about 50 km to over 500 km, molecules are ionised by radiation from the Sun to produce an ionised gas. This region is called the ionosphere. Ionisation is the process in which electrons, which are negatively charged, are removed from (or attached to) neutral atoms or molecules to form positively (or negatively) charged ions and free electrons. It is the ions that give their name to the ionosphere, but it is the much lighter and more freely moving electrons which are important in terms of high frequency (HF: 3 to 30 MHz) radio propagation. Generally, the greater the number of electrons, the higher the frequencies that can be used. During the day there may be four regions present called the D region, 50 to 90 km, E region, 90 to 140 km, F1 region, 140 to 210 km and F2 region, over 210 km. During the day, sporadic E is sometimes observed in the E region, and at certain times during the solar cycle the F1 region may not be distinct from the F2 region but merge to form an F region. At night the D, E and F1 regions become very much depleted of free electrons, leaving only the F2 region available for communications; however it is not uncommon for sporadic E to occur at night. Only the E, F1, sporadic E when present, and F2 regions refract HF waves. The D region is important though, because while it does not refract HF radio waves, it does absorb or attenuate them. The F2 region is the most important region for high frequency radio propagation because it is present 24 hours of the day; its high altitude allows the longest communication paths, it usually refracts the highest frequencies in the HF range. The lifetime of electrons is greatest in the F2 region which is one reason why it is present at night. Because the F1 region is not always present and often merges with the F2 region, it is not normally considered when examining possible modes of propagation. If you would like to read more follow the Introduction to HF Propogation in PDF format on the IPS Space and Radio web site. Sunday Bulletins Every Sunday morning following the S.A.R.L. Bulletin (Afrikaans 08H15 and English 08H30), the Durban Amateur Radio Club presents a bulletin of news and information (at 08H45) to keep members and interested listeners up to date. 145.650Mhz duplex is the prime frequency with a relay on 7.058MHhz in the 40m band. This bulletin is re-broadcast every Sunday evening at 18H00 only on 145.650Mhz, Thanks to OM Jimmy ZR5Z. and is followed by an evening of interesting conversation. Ham Magazine Ham Magazine follows the DARC bulletin at approximately 09H00. Ham magazine is an interactive program run so as to include you, as an active participant not just a listener. Take advantage of the program and participate. Amateur Radio Mirror International (ARMI) The world renown ARMI follows the Ham Magazine between 10H00 and 11H00. Visit the Amateur Radio Mirror International web site for more information. Club Contact details: 17 Brownlee Place, Bluff, Durban, 4052 or |