We already tryied tests inside a big ship of our navy force.
Frequencies on vhf band (140-170 MHz) and we had contact until 6 heavy and closed door on the same horizontical level , after that nothing at all&.
Tranceivers was tk-2160 by Kewnwood company with a power output 5 Watt.
Best regards
Dimitris Velissaris
Technical Support
RadioCommunications Dpt.
ANCO S.A
44 Syngrou Ave
117 42 Athens - Greece
Tel : +0302109209217
Fax : +302109209345
URL : www.anco.gr
e-mail : [EMAIL PROTECTED]
Intership communications are usually VHF, and in-ship UHF.
In that case I'd use a UHF repeater with the duplexer antenna
port feeding a Radiax system that goes throughout the ship.
The Radiax cable will "leak" RF everywhere and allow inter-
compartment comms just fine.
Over the last 10 years a local company has installed over
20 miles of Radiax in the basements of buildings, in parking
garages, etc.... You put a small antenna at the far end,
and run it wherever you need signal. In a building you put
the radio in the basement and run Radiax up the elevator shaft
to an antenna on the roof. The building security folks can
talk anywhere on their handhelds plus for a few blocks around
the building.... The owner can tell stories about building
inspector after building inspector having to be educated that
this is one cable that you CAN'T put inside conduit... no
matter what.... It's made in plenum and regular type and you
had better order the right type the first time...it's not cheap.
Mike
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