Hello Walt,
Thanks very much for your comments about the large experimental box loops.
Quite a few photos and detailed construction information on these monsters
is contained in the related 14-page article, which the editors of NRC and
MWC have kindly agreed to print in their club bulletins (Nick, with his busy
schedule, is still looking it over for the IRCA Technical Column).
I think the loop design would be very suitable for hanging from the
ceiling of the cottage at Haida Gwaii, assuming that you don't have too much
electrical wiring in the vicinity. The PVC frames were specifically designed
for light weight, so that even the 9' sided loop weighs only about 16 pounds.
The article gives detailed construction steps for building any of ten
different-sized tuned passive loops, from 18 to 9'. Actually, John also
mentioned about disguising one of these as a chandelier, and hanging it from
the
ceiling at Orcas :)
73, Gary
In a message dated 9/7/2009 3:40:24 P.M. Pacific Daylight Time,
can...@gmail.com writes:
d1028g...@aol.com wrote:
Hello All,
The ambitious plan here on this holiday morning was to test out the new
9'
sided PVC box loop here in actual TP DXing, as rotated on a heavy-duty
PVC
support base in the back yard. After serious labor in preparation for
this
Labor Day test, everything was ready to go at 1200 UTC-- except for the
TP
signals.
The monster box loop was able to provide serious gain for this
morning's
anemic TP's, but as John, Walt, Nigel and Dennis have already reported,
the
signal levels were dreary at best. No matter what the antenna, if the
propagation is tanking, your DX results will tank along with it.
At the peak of a very modest dawn enhancement (around 1315), weak audio
was
heard on 657-Pyongyang, 666-JOBK, 738-Taiwan (with the buzzing carrier)
and 972-HLCA, with strong audio on 594-JOAK, 747-JOIB and 828-JOBB.
After
the lackluster Asian TP's faded at 1330, the monster loop was swung
around
for DU's, and weak audio from 738-Tahiti was heard, along with a strong
carrier from 639-Fiji, and a moderate carrier from 648-Rhema-- among
other
moderate-carrier Kiwis and Aussies.
The morning wasn't a total waste, however, as various mechanical
refinements to this largest-sized PVC Loop were tested, and worked well.
When TP
conditions finally cooperate, this 9' sided (13' diagonal) tuned
passive loop
should fully justify its $52 cost :-)
73, Gary DeBock
Modified ICF-2010 (30 loopstick)
9' sided PVC Loop (related article is in DXer.Ca, and in the Yahoo
Ultralightdx file site)
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Gary, I do hope that someone is recording your efforts (photos) for
prosperity! I'd love to try one of these sometime. Vlad Titarev in
Ukraine had a large diameter loop at his DX shack which hung from the
ceiling and could be rotated by hand. I could do the same at my cottage
in Haida Gwaii.Walt
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