Bill A said:
Gee, Mal, if all of us follow this general statement of yours, you will
have
few new stations to contact (as you were complaining about only a month
ago). All debates aside, at least the loop allows a way for a number of us
to transmit on LF .......... with sites impossible on which to erect a
vertical. And don't be concerned about the 100w power level, proposed in
the
US, over- driving a 50'x50' loop. A 12Ga wire has no problem with the 8.3A
of current at 100W.
BTW: The number of TX loop using Lowfers will likely outnumber the number
of
vertical using Lowfers (the active ones) in the US this winter!
It is interesting that Lowfers in the USA have found the transmitting loop
superior to the Marconi in a restricted QTH. When we started on 73kHz some
years ago G2AJV was the first to put out a reasonably strong signal and he
was using a large loop. G4JNT and G3XDV also put out reasonable signals from
very restricted sites and later found that a Marconi from the same site
radiated a stronger signal for the same transmitter power. As a result it
has become part of UK LF collective wisdom that the Marconi is superior to a
loop of the same size. The Lowfers have more years experience working under
more restrictive conditions than we have. Bill, do you have some comparative
data?
A description of constructing transmitting loop antenna variable capacitors
appeared in Radcom Feb 1994 called 'Experimental magnetic loop Antennas' by
C R Reynolds, GW3JTP. The article is reproduced in the book 'Backyard
Antennas'.
Regards,
Peter, G3LDO
e-mail <[email protected]>
Web <http://web.ukonline.co.uk/g3ldo>
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