Been troubled by some lack of performance in OZFLARMS for some time now and only yesterday after talking to Mark Fisher realised many of the stick communication aerials on OZFLARMS may well be wrong frequency. I do know 4 in our club are wrong length and the fifth glider has one of those Mobile one long range aerial which gives you green LEDs well beyong what the eye can see even 4 to 5 km!!!
My calculation for 900mhz is the 1/4 wave aerial 75 to 80mm long. At our club 4 the little white aerial say 40 mm long - far too short. It would seem the little person in China threw all the say 900MHz and either 1800 or 2400MHz aerials in the one box as they looks the same on the outside. *I urge as many people as possible this weekend pop the rubber cover off the aerial and inspect the inside aerial length* I am predicting 50% of the aerials will be the wrong length - far too short. Job will take less than 1 minute. It would be easy to add a little copper wire of the right length While on Flarms etc I can say GPS (flat aerial) are best placed 25cm apart as the GPSs can interfer with each other. Also in motorglider if you are using the engine battery I would suggest fitting a 22000uF capicator in the power lead near flarm I will be very interested to hear the results of the aerial wore length Ian McPhee 0428847642 and for those trying to phone me this week I am often in a 1bar NextG area - the phone may ring but if I answer it immediately drops out so please use SMS till Sat night. Interestingly here at Whitsundays Optus High Speed Broadband is strength 4 bars. So Telstra is not perfect after all
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