[RFI] 80 meters RFI at N9CJT tracked down to an AT&T line (probably VDSL)

[AA5CT]

 ATT "U-Verse" service perhaps?

I had straight ATT DSL, the original 3 MBit offering years back starting about 2010, and 
all energy was below 160 meters even (I work 160 from this small lot and the telcoservice ran under one half of the QW tuned loop) ... I even bridged the line to have a look 
with a spectrum analyzer when the service became intermittent and I said: "What do Ihave to lose?" by looking.


ATT pushed U-Verse heavily a few years back, I never saw the need to upgrade, so I didn't,but apparently I was affecting other U-Verse subscribers on my block with 1 kW operationson 160 meters ... one day I had come home and found an ATT employee taking  picturesof my house and I asked him what was up, and he explained it. 


I also noted several carriers in the 80 meter band, attributed by me to ATT U-Verse signalleakage, this was a few years back and I have not looked for a couple years.

de AA5CT Jim


    On Sunday, September 10, 2023, 8:03:57 AM GMT-5, Don Kirk <wd8dsb at gmail.com> wrote:  
 
 I was asked to help locate the source of RFI at N9CJT and yesterday we
tracked down/identified the source to be from an AT&T (formerly Ameritech)
system and all indications are that the system is VDSL or similar.

For those interested here is the link to a video that documents this case.
https://youtu.be/3sYZTXGnLjY

Once again the portable flag with DX Engineering preamp allowed us to
quickly narrow in on the property where the RFI was originating and then we
used a small sniffer loop to identify a specific line (cable) on the wooden
utility pole where the RFI was emanating from, and this line turned out to
be an AT&T line.  Noel (N9CJT) will now follow-up with AT&T.

Just FYI, and 73.
Don (wd8dsb)
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