At 2/21/2006 12:41 PM, you wrote:
>I don't have a suitcase large enough to carry a repeater with duplexers
>suitable fot a 600KHz split.
>
>I am sure that something could be assembled with low enough output to
>handle the mobile duplexers that are so abundant for VHF; thre ones
>designed for a 5 MHz split. However, I can't see the beauty of a
>portable repeater that is 100% duty cycle at 2 watts output.
I have a 2 meter portable repeater using a VHF mobile duplexer at 2.655 MHz
split. Power output is about 22 watts. Single antenna, fits in a
backpack, no desense. Radio is a G.E. MVP; nothing with a broadband RX
will work as the duplexing depends in part on the narrow selectivity of the
G.E.'s helical resonators.
> Even if
>you were able to get the power output to a level as high as 10 to 20
>watts, that portable tower structure is what I would like to hear about.
Mine is usually deployed on top of a building, so we just lash a 5 or 10
foot piece of galvanized EMT conduit to whatever won't generate IMD with
whatever antenna suits the need (3 element Yagi for directional coverage,
Comet/Diamond base omni for omni coverage). Proximity of the antenna to
the repeater hasn't been a problem.
Bob NO6B
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