Like I said I am not the fun police by any means, trust me. In fact I am quite the opposite. Australia is way too restrictive in my opinion on just about everything. That being said I have been a ham for over 20 years now so I do have a good idea of how radio works. The main jist of my post is that even though one can technically use 915 to 928 it may not be the best option if you have an expensive rocket on the "finding side" The Department of Defence is also allocated to use that portion btw along with general consumer items at less than 1watt. UHF 430mhz is for Hams only. Even if the mobile phone towers are not specifically on 915 to 928 if they are in the area your front end will be overloaded and your rx will not work. Not to mention if someone next to you makes or receives a phone call that too could interfere. Hence in my first post I think it would be prudent to test your flight area with a scanner prior to flight to see if there is a clear clean portion of bandwidth to fly or if there is interference from anything. Just because the Mobile tower is not specifically on 915 to 928 doesn't mean a few mhz away will not bleed over in the area these devices work on. I am into RC aircraft as well and for the last year and half been getting into FPV (first person view) alot of the guys in the states use 900 mhz for a number of good reasons. They don't have the lic'd telstras above and below them on the bandplan. Here in Oz for the most part the video is interfered with if you are anywhere near a mobile tower or can see one on the horizon. So almost no one uses 900mhz.
Yes the Ham lic cost money to keep here in Oz. I really think that is a rort lol. I also hold a lic in the US which is free and renewable every 10 years not annually but that is Australia.
I intend on having a portable Packet station at Thunda next year which will track any rocket using BRB on the packet freqs using APRS. This means that any number of rockets can be in the air and all the ground stations can rx thier position and reflect it to other stations. IE if my station hears the rocket and decodes the packet and the rocket's owner does not because of bad antennas or what ever, my station will repeat the packet so that the owner will hear it too. Very handy especially if you have different people using different antennas or hand held radios with very limited antennas.
If your hellbent on running 900mhz you might want to look into some antenna options to increase your rx signal. Here are some directional antennas used in the same band for FPV.http://www.readymaderc.com/store/index. ... h=11_45_47
I would opt for the RP SMA option with the Eggfinder for sure. The wire antenna for sure will degrade your rx ability over distance, especially if your polarization is off with the tx. Laptops and computers for that matter are notoriously rf noisy so having a good rx antenna is paramount.
I am interested if you guys have any success with these Eggfinder units. They look good. My concerns are solely over the fact that FPV here in Oz using the same freqs is all but dead because of interference from mobile towers. Loss of video when flying your plane at a distance usually means loss of aircraft, though with Return to Home GPS these days it is a bit better sorry off topic. I would still suggest though that if you have an expensive rocket and want it back the best option is the BRB or Telemetrum from Blake along with spending 70 some dollars a year to keep a ham lic. You might even find the radio bit fun
73 de vk2icj ..