It's interesting how people's experiences differ, and how their perceptions
of how something actually works, and how a computer model calculates how it
should work. I have used MMANA-GAL to model designs, and it certainly helps
to quantify my measurements, and is a good start. "Your Mileage May
Oh that's something else I forgot to mention . . .
A couple of years ago I built a 160m Receiving Loop, which is Vertically
polarised.
It behaves very differently to my Dipole, I can see huge differences on
European signals, depending on how far away they are, and the Propagation at
the time.
For a literal "pair of radio wave glasses":
Given the vertical gain of a practical 160 dipole is pretty much cloud
burner and a decent 160 vertical is pretty much low angle, IF you know
the actual real gain patterns, then it is possible to compare signal
amplitudes (probably real time consider
well as or sometimes better than the 8-circle.
73, John W1FV
-Original Message-
From: Topband
[mailto:topband-bounces+john.kaufmann=verizon@contesting.com] On Behalf
Of Artek Manuals
Sent: Friday, December 11, 2020 9:39 AM
To: topband@contesting.com
Subject: Re: Topband: EZNEC Ground
Well I agree with that too Dave . . .
To me, it's a kind of "Urban Myth" that 160m DX is all Low Angle
propagation.
Sure, on 80m it nearly ALWAYS is . . . You MUST have a Vertical to work DX
well on 80, a Dipole is rubbish (even though my 80m dipole is effectively
twice as high as my Top Band
OR
The propagation mode on 160 is not what we have popularly come to "Accept".
There is a growing body of evidence that particularly at gray line that
signals often arrive at a higher angles. This is often attributed to
"ducting" . Maybe a lot more of 160 intercontinental propagation is due
Guy I have ALWAYS thought that the various Computer-based modelling of
Ground and its effect on Antennas is WAY off . . .
And surely the errors are MOST significant on 160m, not just because
Antennas are near the ground (in wavelength terms) . . . but also because
even the ground 130 ft deep is
