Thread: Radio Comms
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Old 09-12-2009, 02:41 PM
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Nowhere Man 1966 Nowhere Man 1966 is offline
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Quote:
Originally Posted by kalos72 View Post
If my team has a manpack that has a range of say 30km, is there a way to setup a relay tower or something to extend the range of the radio to reach their "home base"?

Any restrictions or special circumstances I need to look for beyond the basic "how do you find and secure a large radio tower"...

Thanks...
Do you want this "repeater" to be omni-directional or do you just want it to beam the signal back to base? I know in the amateur radio world, I use repeaters a lot on VHF, the signal goes out in all directions. A lot of times, they would go beyond the 30 km range. There are also links too where you would have the omni-directional repeater linked up to another repeater or a control station, that link would most likely be directional and on other frequency.

I think what you would need is an omni-directional repeater at the area you're working in. You would use one frequency to access the repeater and another to listen. For example, when I use a local repeater here in Pittsburgh, I would set my walkie-talkie (or whatever) to transmit on the input frequency at 147.690 Mc and I would listen to the signal on 147.090. Mc, the latter signal covers a lot of range. Also if you want a directional radio/control link, you would use a third frequency or a second set of input/output frequencies, as links, say 224.26 Mc input, 224.86 output. There is a chain of repeaters I use from the Pittsburgh area that goes down past Washington DC that uses such a system.

Maybe II should draw a picture to explain it more.

Chuck M.
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