[Milsurplus] NVIS again

[Hue Miller]

They didn't categorize it as NVIS, but every WW2 mobile radio with a wire 
antenna option, including the
W.S. No.19, operated using this propagation feature WHEN USING WIRE ANTENNA 
and not the standard
vertical whip. They simply didn't have masts tall enuff to raise the wire 
antenna an appreciable fraction
of a wavelength, at those frequencies.  Actually, it occurs to me that with 
a short whip, there is lots of
high angle radiation too, so I'd suppose even the whip transmitted a mixture 
of modes, ground wave
and NVIS. It comes to mind, that I'd read in a German manual for a walkie 
talkie type, I think operating
at low HF, that the user could expect LOWERED distance at night.
-Hue