[TowerTalk] NVIS Antennas

[doc]

I wasn't even pretending to comment on the physics, just
waxing philosophical as I wander around the 'net waiting
for the xyl to return from an absurdly extended on-call
day working at the hospital.

With all of the delays and hassles re. the new house I am
happy to have a multiband vertical strapped to the side of
one section of concrete-anchored Rohn 45!

One of these days I will find the minutes ... hours ...
necessary to get the tiltover arm fixed, the longwire
relocated, purchase two more straight sections of Rohn 45
and get them vertical, assemble my C3SS, etc !

Sigh ... methinks some tea and crackers are in order ...

73, doc

> No one ever said contacts can't be made with crappy lossy
> antennas. At least I didn't say it.
> 
> All I said is the only thing that happens electrically as an
> antenna is lowered below 1/8 to 1/4 wl  (depending on earth)
> is losses go up dramatically.
> 
> That been measured in field strength studies of NVIS
> radiators in Thailand, as well as confirmed in my own
> systems.
> 
> The idea HF groundwave with horizontal polarization extends
> for 20 miles with enough level to cause fading is pretty
> silly. More than likely what they had going on, if they
> actually measured anything at all, is feedline radiation
> allowing a significant vertical component. Vertically
> polarized signals can follow the earth at HF, although 20
> miles might be a real stretch.
> 
> Once a bad idea gets started it's tough to stop.
> 
> 73 Tom
> 
> 

-- 
Thanks! & 73, doc kd4e

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