UHF space

Gary Nicholls sookees at islandnet.com
Mon Dec 24 06:13:03 EST 2001

I can see where the 27 Mhz band would be limiting, although I think as part
of a community communications system it might be useful for text messaging,
but what about UHF between 470 and 800 mhz? My UHF detector (portable B/W
t/v) has maybe 2 channels with a carrier, and the occasional tow truck or
taxi conversation. Isnt there 6Mhz per channel here, with guardband, and
dozens of channels? Of course there are legal problems (Im in Canada) but if
these channels are not being used, I think the public should have access to
them for community purposes.

>> Given that AM-CB modulators are dirt-cheap to make, I'm thinking a
>> home-brew low-power 27MHz modem (with as much brains as an IrDA port)
>> could be an alternative..

>There are legal considerations, but putting those aside, speed will be
>lacking because of the typical narrow bandwidth available on a CB radio,
>300-1200 bps is typical on HF radio via amateur radio.  The other problem
>is the communication is simplex, unless you have a receiver & transmitter
>running together at both ends with enough separation so they don't
>interfere with each other.

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