----- Original Message -----
From: "Paul Manuel" <k4pdm@yahoo.com>
To: <amps@contesting.com>
Sent: Thursday, April 07, 2011 5:41 AM
Subject: Re: [Amps] Where is power measured ?
>
> --- On Wed, 4/6/11, Carl <km1h@jeremy.mv.com> wrote:
>
>>> Broadcast stations power is based upon their license
>> specifications and
>> field strength measurements are taken at the time of
>> certification. The FCC
>> also requires regular field strength measurements to
>> certify that you are
>> both still maintaing the power level and that nulls are as
>> required in
>> directional arrays. Running a too low a power level due to
>> deteriorated
>> radial fields or feedlines is just as illegal as running
>> too much power.
>
> Field strength measurements are normally not required for broadcast
> stations. The only time we've had it done was when a cell tower was
> constructed near one of our AMs and we had to determine if it re-radiated
> the AM and made it unintentionally directional. Not sure about
> directionals, thankfully I've never worked for one.
>
> 73, Paul K4PDM
Its been a few years since Ive been involved at that level but around here
the big grumble was when the FCC inspector wandered thru looking for the FS
logs. These were day/night power level single and multiple tower stations of
up to 10KW max. I dont know if the visits were just normal or prompted by
interference complaints.
One thing for certain is that it has been a long time since Ive heard AM BCB
harmonics on 160.
Carl
KM1H
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