[RFI] Strange noise

[Yuri Onipko]

Hi.
While operating WAE Contest this morning I noticed strange noise on 20
meters. I have this noise at every 16-17 KHz portion of the band (i.e.
14118.5, 14134, 14150, 14166, 14182.5, 14199, 14215.5 and so on) and it is
approx. 2-3 KHz wide.
Peaking S9 on 14199 and fading to about S6...7 on the edges.
It appears most of the time for 9...10 seconds, then disappears for 3-4
seconds and then comes back. Sometimes it lasts 4-5 seconds , but mostly
around 10 seconds.
With my beam I found the bearing which is 60...70 degrees (almost my direct
short path to EU) and the noise completely disappears when I turn my beam
20-30 degrees off each side.
Is this some kind of electric fence? I would appreciate any advise from the
group.
Thanks.
Yuri  VE3DZ