Hello from wet old Melbourne, Australia
I have been asked to put together a package for a sporting event that will have 2 capacity plus bases flying to give us 4 cap.plus channels of UHF trunking
Have 2 dr3000's = easy bit
Have 1 useable hole in the plane to mount antenna = getting more difficult
Have 24volts dc at 20 amps = handy
I need some advice on a light weight uhf combiner (470 mhz tx 475 mhz rx) to take the 2 dr3000's into just 1 antenna
We would run the bases only at 5 - 8 watts which I understand makes the whole combiner package a bit easier and smaller
Thoughts on what I should be looking at would be appreciated
TIA
Mike
Need light weight uhf combiner to go in aircraft
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Re: Need light weight uhf combiner to go in aircraft
What sort of weight/space limits do you have? What sort of aircraft is it going in?
Re: Need light weight uhf combiner to go in aircraft
Since you're going to need another hole for the rx antenna why don't you just use duplexers on each repeater? Or you're going to have a mag mount inside the plane for RX??? Sounds you could use a combliner.....there I said it
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Re: Need light weight uhf combiner to go in aircraft
Still to be determined but i have been told 2 x 10 ru rack cases would fit in with a weight limit of around 90 kgs total as it is a 2 seater with cargo baymr.syntrx wrote:What sort of weight/space limits do you have? What sort of aircraft is it going in?
The deal breaker is only having 1 antenna for tx & rx and the 2 bases
Re: Need light weight uhf combiner to go in aircraft
I have seen multiple repeaters with a combiner and the multicoupler run through a duplexer to get it down to 1 antenna. This add slightly more loss and an additional area of failure. However, I think you could get away with mobile duplexers (small,light,cheap,not great performance) vs. a high performance 6+ cavity duplexer. Just for clarification, you are putting in 2 repeaters correct? You refer to "bases," but it sounds like you are making reference to repeater activity. FB
......I understand what the package says sir, but you cannot talk 28 miles with 3 AA batteries.......
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- Posts: 171
- Joined: Tue Apr 08, 2003 10:33 pm
- What radios do you own?: Analogue, Digital x lots
Re: Need light weight uhf combiner to go in aircraft
Hi FatBoyFatBoy wrote:I have seen multiple repeaters with a combiner and the multicoupler run through a duplexer to get it down to 1 antenna. This add slightly more loss and an additional area of failure. However, I think you could get away with mobile duplexers (small,light,cheap,not great performance) vs. a high performance 6+ cavity duplexer. Just for clarification, you are putting in 2 repeaters correct? You refer to "bases," but it sounds like you are making reference to repeater activity. FB
Yes that is correct, it would be my intention to have 2 repeaters in Capacity Plus Trunk configuration to give me 4 channel trunk capabilities
The deal breaker is that we have only 1 antenna hole on the aircraft so therefore I need both repeaters to tx & rx through 1 antenna