Hi Stefan
Loops at this QTH are not very successful, yes lots of mains borne QRM.
I do have a 1.2m diameter octagonal 10mm copper loop, I have never tried
that on Sub 9kHz, I may try it one day down at the shed but its not
possible for a while.
That little bit of woodland you spotted for possible /P is private, as
usual for the UK :-( Although there are some public foot paths that pass
through, it is still part of Lady Di's father, Earl Spencer's estate I
think. His gamekeepers have barricaded in some 4 wheel drive vehicles
which were in another of his parcels of woodland here:-
http://no.nonsense.ee/qth/map.html?qth=IO92MG54RP&from=IO92MG54MO and
the owners had to abandon them. The size of the parcels of woodland is
such that if you blink as you drive past them you will miss them :-)
I don't think that spot you chose would be that quiet, there is the saw
mill a few meters to the East and an industrial estate just to the
South. It is so different in scale to your forests and the
accessibility, isolation and beauty they offer.
I have in the past taken the e-probe to some fairly isolated camping
sites to see how quiet it can be.
73 Eddie G3ZJO
On 10/04/2017 15:45, DK7FC wrote:
What i wanted to suggest: What about a loop as an alternative antenna?
With 2 soundcards you could run 2 spectrograms comparing both
antennas. You know the loop in my tree is a single turn loop with just
1.2m diameter out of copper tube which has 10mm diameter. It is a non
resonated loop with a ferrite transformer (Al~10nH), i.e. 1 single
primary turn and about 100 secondary turns connected to the preamp. It
could help to reduce the QRN in summer. But maybe the QRM becomes even
higher. On the other side you can eventually cancel out the QRM, maybe
worth a try.
Or go /p, e.g.. here:
http://no.nonsense.ee/qth/map.html?qth=IO92MG54RP&from=IO92MG54MO :-)
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