On Feb 6, 2005, at 7:16 PM, k7fm wrote:
"I don't believe there is ANY transmitter on earth (amateur or pro)
that
could influence the ionosphere by causing a non-linear behavior in
that."
Stanford Research Institute found otherwise.
Looking at the situation in reverse, if an amateur transmitter (even
operating at illegal power) can cause a non-linear reflection, then it
would
be probable that power used would be at the beginning of the non-linear
range. If that was so, then higher power would be much more likely to
trigger the non-linear reflection.
Since the effect was observed in the early morning, perhaps it has more
to do with D-layer absorption, than F-layer reflection?
There are enough higher power stations
operating that the event would be reasonably common, and AT&T would
likely
have discovered it when they were using high power in the 30's for
overseas
telephone service. That such events have not been regularly reported
by
higher power raises a red flag.
In the 50's, CQ carried an article that proclaimed that reducing power
would
trigger ionospheric amplification. It was in the April issue. That
sounds
like the same theory in reverse. Perhaps this present discussion can
be
submitted to CQ in time for the April, 2005 issue.
Colin K7FM
cheers, Colin
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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