Hello AJ,
Topbanders have done an excellent job of precisely identifying the source
of the 1940 kHz intermod.
I don't think its helpful for those of who are not being harmed to lodge
a complaint with the FCC. Its the responsibility of those being
harmed t file a complaint. Those being interfered with also have a knob
on their radios that allow them to avoid interference.
American amateurs suffering harm can file a complaint to the FCC.
Canadian amateurs can lodge a complaint to their regulatory authority,
that authority can then file a complaint to the U.S. government. It's
a routine process used often.
73
Frank
W3LPL
From: "A J"<iamfromcanadaalso@gmail.com>
To: "Frank W3LPL"<donovanf@starpower.net>
Sent: Saturday, January 7, 2023 1:39:11 AM
Subject: Re: 1940 kHz intruder WWRU WKMD
Hi Frank
How do we define harmful interference?
I know some of the guy's that talk on 1940 and at times it makes it impossible
for them to talk.
One of the gents is located near Barrie Ontario (480 miles) and at times he can
not even hear others he is talking to. Others near Buffalo others in north west
Pennsylvania.
About 380 miles to my location. I had a friend near North Bay Ontario listen
when I was trying to figure out where it was coming from or what stations it
was he is 500 miles away and it is heard there.
I hear it before ~1hr sundown and hear it about 45 minutes after sun rise.
Other times I have heard it mid morning.( signal level from S3 to S9+10 with
~12 db attn)
Is it possible it is re-radiating from some other structure?
Cheers AJ___ VE3HJ
On 1/6/23 19:40, Frank W3LPL wrote:
Hi AJ
In my opinion, the next step is to determine if this intruder is causing
harmful interference,
Several of us can hear it weakly and intermittently hundreds of miles away,
but so far no one has claimed that its harmful.
73
Frank
W3LPL
From: "A J" [mailto:iamfromcanadaalso@gmail.com |<iamfromcanadaalso@gmail.com>
]
To: "Frank W3LPL" [mailto:donovanf@starpower.net |<donovanf@starpower.net> ]
Sent: Saturday, January 7, 2023 12:27:47 AM
Subject: Re: Topband: Spur as it reappeared
Hi Frank
So what is the next step?
What do we do?
AJ___ VE3HJ
On 1/6/23 18:44, Frank W3LPL wrote:
BQ_BEGIN
Hi George,
Faulty day/night switches may well be the cause! You may have seen
in my previous email that both stations switch patterns from day to night.
This is the first time I've ever hears of two AM stations with two
antenna arrays sharing the same small site
73
Frank
W3LPL
----- Original Message -----
From: "George Hirst" [mailto:geohirst@yahoo.com |<geohirst@yahoo.com> ] To: "Rick Stealey"
[mailto:rickstealey@gmail.com |<rickstealey@gmail.com> ] Cc: [mailto:wd8dsb@aol.com |wd8dsb@aol.com ] ,
"donovanf" [mailto:donovanf@starpower.net |<donovanf@starpower.net> ] Sent: Friday, January 6, 2023 11:39:10
PM
Subject: Re: Spur as it reappeared
I am “talking through my hat” here. The fact that it seems to suddenly get much stronger right about
your (New Jersey) sunset make me wonder if it is related to the AM broadcast station(s) changing their antenna
pattern(s). (I haven’t done the research to know if these stations are ones that are required by the FCC to
change their patterns at night to “protect” more senior stations who share the sane frequency.)
Perhaps there is some corrosion on the RF switches employed in that function that introduces nonlinearities. Those
nonlinearities result in mixing products (ie. 1940 kHz) which are then radiated. ????
George - WF4U
BQ_BEGIN
On Jan 6, 2023, at 4:14 PM, Rick Stealey [mailto:rickstealey@gmail.com
|<rickstealey@gmail.com> ] wrote:
Note the waterfall. The timestamp on the right is accurate. The horizontal
line is a lightning burst. But notice the ugly signal that came up on 1940
before the carrier. Anyone have any idea what is happening there?
<image.png>
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BQ_END