Hi all,
As I was the original OEM of the OzFlarm some explanation for the antennas is required. The original ozflarms used 1/8 wavelength stubs commonly used on wireless modems in the 800 900 MHz band. We used them because the ¼ wave would just not fit on most dashes if you used a true ground independent type which added the extra height. So you could use out of the box the supplied antenna and have reasonable coverage. We then offered a clear high gain antenna which had excellent range but was difficult to locate in a suitable position to take advantage of this. The final solution was a ½ wave ground independent which Mark sells and works fine BUT you have to submerge about ¼ of the length in the dash and poke the rest above. They work fine so long as you dont shield the radiating section. We also sold a stick on antenna that was a ½ wave dipole, those who have a glass nosecone can use these, vertically polarised. Our club discus has one and its working well. The ultimate solution is an external antenna with a very short feed cable as you will lose most of the signal in the cable if not careful. The new powerflarm has a better receive path and higher TX aimed at the G.A market (sports aircraft, ultralights) but can be used in gliders, it also receives mode A/C transmissions and issues proximity alarms, and if equipped with ADS-B you will see their location and height, distance as well. Choosing the correct antenna and providing the best location and installation possible is imperative for maximum benefit of flarm, especially early detection of a front on conflict so take the time to make it work, use the antenna tool for ranging on the flarm site which looks at your IGC file which has some information pertaining to the distance of other aircraft received during the flight, best to use this at a comp where you have lots of targets to provide the data. It will map your received profile, 2 or more kms is an acceptable result. Cheers Nigel o Nigel Andrews Engineering / Sales 1A/13 Steel Street (upstairs) Capalaba Queensland 4157 Australia - PO BOX 114, Capalaba, Queensland Australia 4157 ( Mobile 0419989288 * <mailto:[email protected]> [email protected] Skype - rv7pilot Andrews Electronics Designs Pty Ltd ABN - 921-33392140 Electronics engineering for the future **************DISCLAIMER************ The information contained in the above e-mail message or messages (which includes any attachments) is confidential and may be legally privileged. It is intended only for the use of the person or entity to which it is addressed. If you are not the addressee any form of disclosure, copying, modification, distribution or any action taken or omitted in reliance on the information is unauthorised. If you received this communication in error, please notify the sender immediately and delete it from your computer system network.
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