The Tennessee Highway Patrol uses a low band for longer distances, 42.42Mhz,
with a whip about half that length.
Since the CAP gets military surplus equipment, it could relate to something
similar to that used by the National Guard.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Paul Braun" <pbraun42@xxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Monday, December 17, 2012 5:31 PM
Subject: Re: [OM] IMG: Airport Observations
> On Mon, Dec 17, 2012 at 5:25 PM, Chuck Norcutt <
> chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>
>> A full wave antenna for 150Mhz (disregarding end effects) is 2 meters.
>> It's for something much lower frequency than that. For full wave
>> antenna length in meters divide 300 by frequency in Mhz.
>>
>> Conversely, to discover design frequency in Mhz of a full wave antenna
>> divide 300 by antenna length in meters. Since that antenna appears to
>> be about 6 meters long the (full wave if it's that) frequency would be
>> about 50 MHz. What's at 50 Mhz? I dunno anymore.
>>
>> The 6m ham band runs from 50MHz to 54MHz. VHF analog television in the
> US used to be in that range - otherwise, I'm not currently aware of a
> commercial service in that spectrum. Aircraft bands are way below that
> (up
> to 25MHz) or up in the VHF range. Maybe it's a half-wave or quarter-wave
> for one of the HF aviation freqs?
> --
>
> Paul Braun
> Music Junkie
>
> "Music washes from the soul the dust of everyday life." -- Harlan Howard
> --
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