Not so fast. The K3's T/R switch can be overwhelmed by very strong
signals. The result is intermod junk all over the bands. This happened
to me with a 50 kW AM BC signal at about 1000 kHz that is line-of-sight
to my antenna. I don't see why a super-strong VHF signal couldn't have
the same effect.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 20-Feb-2020 20:10, Fred Jensen wrote:
Andreas: The probability that your noise is due to the TV or FM station
is extremely low [like really zero]. Meadow Lakes CA is the "TV/FM
capital" for the southern Central Valley [Fresno], and my 2m HT goes
full bars about 2 miles from the complex on both FM and AM [aeronautical
band]. When at the repeater site next to a 300 KW digital TV station,
my comrade's HT won't break my squelch. It is just front end overload
from way out of band, there is no discernible noise.
The number of noise makers we normally see in urban/suburban areas is
almost countably infinite. In addition to the 24/7 constant hash from
SMPS, I have a variety of intermittant noise sources that come and go
with periods ranging from a few seconds [probably the A/C motor starting
at the gym behind us] to an hour or so. One is a sequence of
synchronized carriers on the waterfall about 7 kHz apart that last for a
few seconds and then burst into roman candles that fog up the WF and
then fade in 2 or 3 seconds. Neighbor 4 doors down the street just
installed rooftop solar which I can now see on the P3 on 160 and 80. [:=(
K9YC's RFI notes pretty much cover searching for and fixing RFI.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
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