Re: LF: RFI noise at 144 kHz exactly

[PA7EY <pa7ey@amsat.org>]

Chris, LF

Screenshot of area around 144 KHz as received in Amsterdam.

Kind regards,

Ulrich, PA7EY

2016-11-26 11:17 GMT+01:00 Chris Wilson <chris@chriswilson.tv>:

26 November 2016


I have been monitoring my noise on my receivers and the big issue is a
constant, day and night, high level noise centred exactly on 144 kHz.
Is  this  a frequency that is familiar to anyone? Googling it has only
brought  up  comments  of  some 20kHz solar inverters talking to their
control  panels  down  the  mains wiring at 144 kHz, with some chatter
about  inverters  going  noisy  and  blanking  out their own talk back
frequency.

My  next  door  but one neighbour has solar panels on his stable roof,
but  I  don't THINK they have an accumulator bank, they just feed back
into the national grid. we don't really get on too well so I am loathe
to approach them unless I can be sure the noise is from there.

There's also a huge, multi acre solar farm opened about 5 miles away.
I would imagine some old geezer with noise near his beloved LF Ham
band frequency would have little impact on its operation, so i hope
it's not tat. Any ideas on what uses 144 kHz, and how to locate the
source?

Here's  a  screen  shot  of  it as it is at the moment, but it doesn't
change,  day  or  night,  and its amplitiude stays pretty constant, no
turning  on  and off I have ever seen. My RX is on my TX aerial at the
moment.

http://www.chriswilson.tv/noise.jpg

Thanks


--


Best regards,
 Chris  2E0ILY                           mailto:chris@chriswilson.tv

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