In a message dated 2015-09-05 7:46:12 P.M. Coordinated Universal Tim,
jamesdavidcain@gmail.com writes:
Hi Dave, I recognized that antenna right away, it's a Larson E. Rapp model
from sometime in the early 1960s. Rapp wrote occasionally and suspiciously
for the QST magazine for some years but QST seems to have disowned him. As
a Novice operator in 1962 I remember sending a cheque to Kippering-on-the
Charles, Massachusetts, but it came back Addressee Unknown. Rapp
Enterprises was allegedly associated with the Original Carton Company, also an
April
issue QST advertiser, Perhaps Rapp decamped to Denmark.
K1TN
Larson, sometimes Larsen, was ahead of his time, or perhaps behind, or
perhaps out of time or out of his mind, or just out there.
When I was a young lad in 1957 and got interested in amateur radio, I would
go to the Goshen, Indiana Public Library and read QST magazine. Once in a
while I understood something.
In the April 1957 issue I ran across an article on very compact HF antennas
by one Larsen E Rapp which interested me. Part of the article dealt with
the underground image of an above ground antenna, found by following the
ground reflection back to a point directly under the antenna, as far below
ground as the antenna was above. Larsen's idea was to bury the compact
antenna at that point under ground with its image being up in the air.
Further
testing of this showed some strange properties, like reversal of sidebands
(my reinterpretation now of what he said then).
The deeper you buried it, the better it worked as the image climbed higher
and higher in the air. He had to stop when he hit bedrock.
Toward the end, he said, "This sketchy (!!!) report is offered to the
amateur fraternity in hope that some of the remaining parameters will be
determined." (My emphasis)
Well, I was 15 and not even a Novice, and all this seemed a bit strange to
me, but there it was in the official ARRL publication. In writing. In
black and white. I remember going back to read and reread the article
several times but I never could come to a conclusion about it.
In 1958 when I got my Novice ticket, I put my antenna up in the air.
After all, it was in February and the ground was frozen.
Somewhat later I found Larsen not entirely on the up-and-up. I'd been
snookered.
But Larsen lives on, though he must be quite elderly, as inventive as ever
and keeping up with the times. Just this year he announced his new voice
skimmer technology. The kinks are still being worked out but I'm sure
you'll see it any day now.
73,
Ken, AB1J, ex-KN9LIO
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