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Re: ULF: EbNaut message transmitted from ground loop

To: [email protected]
Subject: Re: ULF: EbNaut message transmitted from ground loop
From: DK7FC <[email protected]>
Date: Sun, 07 Apr 2019 11:06:32 +0200
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Am 07.04.2019 07:17, schrieb Paul Nicholson:
Perhaps also the longest ground loop antenna used for
amateur transmission?
You never know. I can imagine that a few more people used similar
antennas, but most likely not in combination with coherent signalling
and modern modes such as EbNaut, and with so much power and optimised
efficiency. Some people may have done local tests (< 5 km) in CW or use
audio (music, voice) to cross some 100m, partly with metallic
underground infrastructure (water pipes...) to support propagation.
I bet there has not been anything beyond 20 km distance, and not at all
something international.
An OM (OT!) of my radio club told stories of his early radio
experiments. He had a friend in some 100m distance and they lay out a
small hidden wire into they ground between their QTHs, using the earth
as the back 'wire'. They communicated over that wire which is nice :-)
But first you need someone who's interested to do something like that.
Nowadays you may need some more wire to find the next QSO partner :-)
73, Stefan

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