Hi Stefan
Please let me qualify a statement. There are times when ten second
dot length would be copible in JA. The norm is 60 second dots...
73 Scott
On 9/27/2010 10:44 PM, Stefan Schäfer wrote:
Scott,
A very interesting mail!
Am 28.09.2010 00:11, schrieb Scott Tilley:
A loop made for a very nice compromise...
If you can work JA / 7200 km in QRSS-10 it is not a compromise but
probably one of the best antennas available for amateurs in the
moment.
As
I
have lots of convenient trees to support this so it is viable
here and
will improve my RX situation as well...
Scott, don't you want to give VLF a chance? If you have so much
space
(like i have too in the Heidelberg's forest, but not as close to
my
home QTH), you could try to build a (earth) loop of some 10000 m^2
and
could start a canadian VLF experiment!? I would watch out for your
signal! :-)
And what about a full size dipole for LF? 1000m is not the problem
i
assume? This may be an interesting alternative like you can see on
my
recent earth antenna tests. Here my antenna is not just working as
a
loop since the length comes near lambda. Maybe a dipole can give
you an
equal efficiency but can be built out of thinner wire and is
easier to
fed with RF.
What distance do i have to reach on LF with my earth electrode
antenna
so that you will see it as an interesting alternative, hi :-)
LF QRN comes down in the last days. Maybe i will do some changes
on my
LF active antenna circuit tomorrow (filters). I assume i can get
another 3 dB or so of efficiency. Then, i hope to receive your
signal
this winther. And you will see mine! ;-)
73, Stefan/DK7FC
My experiments with verticals have come to an end at this QTH.
Not to
say that in the future I will not experiment with them at other
QTHs
but they simply don't suit this QTH. That's the secret in my
opinion
of getting a decent signal out is finding an antenna that
maximizes the
potential of a particular QTH not following a dogma certain
mal-contents seem to preach...
73 Scott
VE7TIL
http://www3.telus.net/sthed/argo/
On 9/27/2010 8:38 PM, Stefan Schäfer wrote:
LF,
Am 27.09.2010 22:14, schrieb Scott Tilley:
If someone knows the relationships for how a loop behaves
over ground
I'd love to see them too!
Can't this be done in EZNEC?
Scott, this sound really impressive. I have thought your loop
area is
even higher. So, if i can find and climb some trees, i could
try to
test a closed loop as well. Sounds like an alternative, maybe.
What about RG213 as the loop conductor, i mean the shielding?
If the
supports are not spaced to much, like some trees, this could
work.
Starting with a small wire, carrying a bigger one and so on.
Oh dear,
so many ideas, help!
73, Stefan
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