I doubt VTR is mixing with a station 230 miles away
On Thu, Nov 19, 2020 at 2:50 PM FRED BELGHAUS <fbelghaus@gmail.com> wrote:
> 3rd harmonics of NDBs can be a real problem on the 160 meter amateur band
> also.
> Several have caused QRM (interference) to stations there, and had to be
> shut down
> temporarily for repair. The NDB transmitters are rather primitive
> affairs, without much
> attention paid in design to spurious or harmonic generation.
>
> Incidentally, VTR is more likely mixing with the carrier of KFQD in
> Anchorage on 750 kHz,
> and producing output on 1050.
>
> 73,
>
> Fred W2AAB
>
> On Thu, Nov 19, 2020 at 2:38 PM Paul B. Walker, Jr. <
> walkerbroadcasting@gmail.com> wrote:
>
>> No wonder I can hear the local airport Beacon on it’s 3rd harmonic! VTR,
>> On 350khz is 1000 watts and it’s maybe 1/4 mile away! Most beacons are a
>> 25/50 watts, maybe a few hundred.
>>
>>
>> I can hear it on 1050khz! Here’s a clip of CJNB 1050 North Battleford,
>> Saskatchewan 2000 or so miles away on my CC Skywave portable... and you’ll
>> hear the beeep beeep beep of the beacon under the music.
>>
>>
>> I’m told the Beacon is so powerful because of the flight path
>> international flights going to/from Anchorage 230 miles to our Southeast
>> travel through our immediate region in McGrath.
>>
>>
>> Audio:
>>
>>
>> https://drive.google.com/file/d/1ZEKepOdjYvdMc-Yvv945W0O-conu6sWx/view?usp=drivesdk
>>
>> _._,_._,_
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