Hello Andy,
It looks like some form of man made QRM, and not power line noise. I am
very familiar with powerline noise, but our noise is at 120 Hz and yours
will be at 100 Hz, 60 vs 50 Hz) so it should sound a lower pitch than
what I am used to, but the waterfall display shows those evenly spaced
groups of noise and that does not look like power line noise.
Dave K1WHS
On 1/11/2022 4:37 AM, Karel Matousek wrote:
Hi Andy.
I do have the same noises problem over here as you have.
I found that it isn’t a 110 KV powerline noise, but probably a
broadband noise is coming from the direction 10 ° here in JO60OK. It's
very annoying. On the 800 meters US beverage (300°) the noise is S4,
but on my second stateside 4 EL bidirectional (330°/150°) broadside
K9AY array 84 meters apart uses the 0° hybrid combiners it is very
strong. It interrupts all night. At first, I thought it was a local
noise made by switching power supply. I’m so sorry, but I do not have
the beverage pointing directly to the north. During the day, the band
is clean, without noise, but when getting dark, the noise begins to be
heard and after midnight it is then very strong.
https://drive.google.com/drive/folders/1DhkrxjaX0Mv171psVF4F_cfOHFB7hEX9
Karel OK1CF
______________________________________________________________
Od: "Andree DL8LAS via Topband" <topband@contesting.com>
Komu: "topband@contesting.com" <topband@contesting.com>
Datum: 11.01.2022 09:21
Předmět: Topband: RFI powerline ?
Hey gentlemen,
I have a powerline 110KV nearby my beverages....this is the sound in
AM, not strong but also not good.Is this RFI normal from the line or
is this an insulator or another problem?Here you can see a short
video and hear the signal from today.
https://www.youtube.com/watch?v=Oue6JGBKzgg
<https://www.youtube.com/watch?v=Oue6JGBKzgg>
73 Andy DL8LAS
www.dl8las.com
www.swing-company-bigband.de/
www.uni-big-band-kiel.de/
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