[Milsurplus] Documentation errors

[Hue Miller]

----- Original Message ----- 
From: "aGEnuine Ham" <gl4d21a@juno.com>
> Which raises the burning question:  WHY??????  Book says for intercept,
> so was the German 30 MHz tank stuff AM, and the target? 

There actually was a pretty fair usage of this part of the spectrum
by the enemy. Many Japanese aircraft used the 30-44 MHz area.
German armor and portable radios worked in the 23-44 MHz
range, with most as you say, of the panzers in the 27-34 MHz
range. German aircraft also used 38-44 MHz.
Some years back, there was an article in Pop Com about
USA found that at some parts of E Coast USA they could
hear skip from panzers in N Africa.   ( These were at least
10 watt output rigs, AM ). So the US set up some kind of
monitoring setup in some New England town. I'm sure it
didn't pay off in any valuable intelligence, that would have
been carried on more reliably longer distance, lower HF.

 For really,
> really strong signals, since the sensitivity of those old designs
> suffered pretty badly above 20 MHz, nevermind poor frequency stability,
> which goes back into the circular argument of why most of our AM/CW comms
> gear didn't go above 20 MHz at first anyway. 
> George
> W5VPQ

Of course, the US made heavy use of low vhf for FM and AM voice.
But for cw type long range communications, the higher HFs like
around 10 meters, would have been just too squirrely for 
propagation, i think.  Not to mention stabilizing a cw rig on an
aircraft at 10 meters.
I think there was a preselector / rf amp available in WW2, i think i 
have seen one, but cannot recall any more.
I've been told the RBC's actually receive well on 11 meters when
the tubes are good and the set is aligned.
Hue Miller