Assuming that the unlicenced bands have the same sort of equipment
requirements in the US as in Europe i.e. as well as the usual TX power,
harmonics, spurii etc the antenna type dimensions are also specified. But
that antenna only applies to the TX, the RX can use a high gain directional
antenna to extend the range. This of course assumes you want a fixed point
to fixed point link. In my younger days I found that driving around with a
gyroscopically controlled stacked yagi on a vehicle results in interesting
(and frequent) conversations with Police Officers.

Regards
Chris

----- Original Message -----
From: "Jim Frohoff" <jfro@JPS.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Thursday, August 31, 2000 3:56 PM
Subject: Re: [OT]: Data on CB/FRS


> > Does anyone have experience using these unlicensed bands for this type
of
> > thing, or have knowledge of why it would be disallowed by the FCC? Aside
> > from ham freqs, are there other unlicenced bands that would work and
have
> > low-cost transceivers available for better than 2 mi. range (non LOS).
>
> I have been doing quite a bit of research the past couple of days and
cannot
> find any "low cost" (<  $100) transceivers that say they allow you to go
> over 1/4 mile or so when legally powered under FCC Part 15 rules.  Most of
> these run unlicensed on 413MHz, 912MHz, or 2.4GHz.  Most of the higher
> powered spread spectrum units say they can do it fine, but they get up to
> around $600 or more (OEM) per unit.  I'll keep looking as I need something
> with that range capability as well.
>
> jf
>
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