Topband: 1940 kHz intruder WWRU WKDM

[Frank W3LPL]

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 at gmail.com> 
To: "Frank W3LPL" <donovanf at 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 at gmail.com | <iamfromcanadaalso at gmail.com> ] 
To: "Frank W3LPL" [ mailto:donovanf at starpower.net | <donovanf at 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 at yahoo.com | <geohirst at yahoo.com> ] To: "Rick Stealey" [ mailto:rickstealey at gmail.com | <rickstealey at gmail.com> ] Cc: [ mailto:wd8dsb at aol.com | wd8dsb at aol.com ] , "donovanf" [ mailto:donovanf at starpower.net | <donovanf at 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 at gmail.com | <rickstealey at 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

-- 
Knowledge is Power and Power is Knowledge.___AJ___1967                                                                      Tell me and I will forget. Teach me and I may learn. Involve me and I shall understand. ___AJ___ 


BQ_END

-- 
Knowledge is Power and Power is Knowledge.___AJ___1967                                                                      Tell me and I will forget. Teach me and I may learn. Involve me and I shall understand. ___AJ___