[Milsurplus] RE: NVIS

[Hue Miller]

----- Original Message ----- 
From: "Ralph Hogan" <rhogan at hiwaay.net>

> NVIS=Near Vertical Incidence Skywave. Its for HF out to 400 or so miles by
> having the radiated pattern at a hi-angle upward. Usually done with a very
> low to the ground wire antenna, or 'bending' over a mobile HF whip. Current
> popular miltary ant hardware is the AS2259.
> 
> Try looking at Tricia's website:
> 
> http://www.tactical-link.com/nvis_discussion_page.htm
> 
> She has some info on German WW2 mobile usage.

This is from her website:

"Note that above, this vehicle also has a telescoping mast, for the purpose of
deploying a doublet antenna or VHF ground-plane antenna  in the field.


"Naturally a full-sized dipole antenna would be a bit more efficient than the
horizontal frame antenna arrangement, however the NVIS frame antenna
will allow communications while the vehicle is traveling.


The Drawing  above is from the book
"German Eight-Wheeled Reconnaissance Vehicles"
by Horst Scheibert - ISBN: 0-88740-476-6"

Now- Pierre Metsu's book identifies these radios in a full-fleged radio (armored) car
( command vehicle, with extra radios ) Sd.Kfz. 263 :

Fusprech A    24 - 25 MHz  A3 A2
Fu7                   42- 47 MHz   A3 A2
Fu12                  0.8 -3 MHz   A3 A1

The book lists for aerials: 

2 masts of about 1.5 meters each, AND, 
frame antenna, OR
8 meter mast, OR
 Star Antenna  ( mobile mast with capacitive top hat. )

So- WHERE does the HF NVIS come into play here?

The book also pictures the extended guyed masts on radio trucks. And masts on
vehicles. NO  groundplane antennas there, friend. That is projecting the present into
 the past. The facts are available - we don't have to go from archeological supposition.
-Hue Miller