Bob Moore Posted March 28, 2016 Share Posted March 28, 2016 I fitted a 5db antenna on my Syma tx to give more reliable range. Range is actually similar probably to that achieved with the standard dipole originally set up inside the tx. But I assume it will have a better signal strength? Range is basically limited by my eyesight. I can get the little quad as high as I dare without losing sight of it! Quote Link to comment Share on other sites More sharing options...
leccy retah Posted March 28, 2016 Share Posted March 28, 2016 What sort of height do you think you managed to get to ? Quote Link to comment Share on other sites More sharing options...
Bob Moore Posted March 28, 2016 Author Share Posted March 28, 2016 It's really hard to say, the wide angle lens on the camera exaggerates the height. I've been tempted to put a bluetooth vario on the quad and I have paragliding software on my smart phone that would let me see the height gain. Trouble is, I doubt the bluetooth will have enough range. Must be a good few hundred feet. People have tested that Syma to nearly 300 metres with the standard little 2.4ghz dipole. Quote Link to comment Share on other sites More sharing options...
Bob Moore Posted March 28, 2016 Author Share Posted March 28, 2016 Easier to judge in this one. The church tower is 104 feet high. And yes, a bit naughty flying at that location. [Video removed] Edited By Biggles' Elder Brother - Moderator on 28/03/2016 13:19:59 Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted March 28, 2016 Share Posted March 28, 2016 If it's naughty, could I suggest you refrain from posting it in a public forum? Edited By Martin Harris on 28/03/2016 13:18:57 Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted March 28, 2016 Share Posted March 28, 2016 No - its not "a bit naughty" - it's illegal. I've removed it, for your good and the forum's protection. Regarding this and a previous thead Bob I really think you need to read the ANO, articles 166 & 167. If you have read them, then I suggest you read them agian, because you don't seem to have understood them! It would be advisable for you to have alook at CAP722 as well for some guidance on how the law might be interpreted. BEB Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted March 28, 2016 Share Posted March 28, 2016 While on my high horse Bob, I might as well ask if you've confirmed whether the aerial enhancement complies with the relevant radio regulations? Edited By Martin Harris on 28/03/2016 13:30:55 Quote Link to comment Share on other sites More sharing options...
Bob Moore Posted March 28, 2016 Author Share Posted March 28, 2016 As far as I know. It's a mod that many people have made. I believe the regs are more concerned about the power output of the tx. limit is 100mW. Edited By Bob Moore on 28/03/2016 14:21:33 Quote Link to comment Share on other sites More sharing options...
Peter Christy Posted March 28, 2016 Share Posted March 28, 2016 The output power of 100mW is the output power of the TX multiplied by the gain of the antenna. Most 2.4 GHz transmitters have an actual output of 60mW, which when multiplied by the gain of the antenna (typically 2dB) gives 100mW ERP (Effective Radiated Power). Using an antenna with a gain higher than 2dB will exceed the ERP regulations. It will also be more directional ie: have deeper "dead-spots". -- Pete Quote Link to comment Share on other sites More sharing options...
Bob Moore Posted March 28, 2016 Author Share Posted March 28, 2016 Apologies to all concerned. I'll do my homework better in future! Quote Link to comment Share on other sites More sharing options...
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