I guess that is possible, Ken. But, the antenna on the roof looks to be
similar to aircraft antennae, so I assumed it would be used for
air-to-ground communication.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Ken Norton" <ken@xxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Monday, December 17, 2012 9:19 PM
Subject: Re: [OM] IMG: Airport Observations
>I was just Doing a little research and I think that's a multiband
> (30-500MHZ) antenna. Unlike typical tuned antennas, it actually has
> multiple antennas inside. For reduced range and mobility they can be kept
> in the lowered position, but can be unclipped. CAP in that part of the
> country uses repeaters (and simplex) in the 140-150MHz range. By using a
> multi-band antenna, only one antenna is required for terrestrial, aviation
> and military communications. The elements inside are usually dipole to
> avoid the need for a ground-plane.
>
> On Monday, December 17, 2012, Jim Nichols wrote:
>
>> Hi Mike,
>>
>> I think I have finally worked it out. The CAP uses a couple of
>> frequencies
>> around 26.6 Mhz for searches. At this frequency, a half wavelength is
>> 17.6
>> feet, or about the length of the van.
>>
>> Jim Nichols
>> Tullahoma, TN USA
>> ----- Original Message -----
>> From: <usher99@xxxxxxx <javascript:;>>
>> To: <olympus@xxxxxxxxxxxxxxxxx <javascript:;>>
>> Sent: Monday, December 17, 2012 7:28 PM
>> Subject: [OM] IMG: Airport Observations
>>
>>
>> > 150 MHz:
>> >
>> > f * λ = c
>> >
>> > λ = 2.0 meters (approx)
>> >
>> > Looks that long perhaps.
>> >
>> > Not on my car regardless, Mike
>> > --
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>> >
>>
>>
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>
> --
> Ken Norton
> ken@xxxxxxxxxxx
> http://www.zone-10.com
> --
> _________________________________________________________________
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