Comments

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  Justin L March 13, 2015 at 3:19am

  You wont look back. I got my original 900 on preorder when they were first released. they are really good. the dual antennas works well. Ive got the small onmi antenna (2db I think) and the other hooked up to the 6db yagi on a tracker with a 5.8 yagi for video.
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  Adam Warburton March 13, 2015 at 3:06am

  I think 433 is slightly more susceptible to interference than higher frequencies? I guess it's much of a muchness, I'm only interested in the technicalities as the RFD900+ system is next on my Wishlist :)
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  Justin L March 13, 2015 at 3:03am

  Yeah they are pretty much the same. We run both at the same time and 915 is always a bit better but that could be environmental and setup factors.
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  Warren Eather March 13, 2015 at 2:54am

  I believe you'll find that the range for 433Mhz@25mW is about the same as 913Mhz@100mW the signal strength and propagation loss for the 913 is about 6db greater than the 433.
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  Justin L March 13, 2015 at 2:44am

  My mate runs the 433. The antennas that came standard with it were actually 2.4 Changed them over to some decent 433 ones and now the range could easly go out of sight. The standard 915 easy goes a few km without gropping below 90%. The rfd900 on the other hand would go 20+km easy at 98% with a decent yagi / tracker setup (if we were allowed to fly that far)
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  Adam Warburton March 13, 2015 at 2:01am

  I agree technically 433MHz would be slightly better at not being blocked by obstructions (and only slightly), but it is only legal to use up to a power of 25mW without an amateur radio license, so you would have to change the settings on the radios to throttle back to 25% of their full power. Whereas the 915MHz can be used at their full power and not even come close to the max power allowed to be used.
• Dani March 13, 2015 at 12:23am

  915 MHz it is, then :)
• Felixrising March 12, 2015 at 2:35pm

  Heh... What Adam said :p
• Felixrising March 12, 2015 at 2:32pm

  @Hotwire, that i just not true - check your facts. 915-928MHz band is covered by the LIPD Class License 2000 of the 1992 Telecommunications Act. The only overlap here is with ISM devices (ie. non telecommunications uses). 915-928MHz may be used by Frequency hopping transmitters up to 1Watt (Paragraph 52).
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  Adam Warburton March 12, 2015 at 2:29pm

  Sorry "item number " not article number :/