[Milsurplus] WWII Aircraft Antenna AN-104-series

[jcoward5452 at aol.com]

I'm just guessing here but was this antenna a "J"pole stuck in a wooden 
airfoil mast? And what about the metal sheath?Is that part of the 
antenna circuit or just a hopefull deterrent to bullets?What little I 
have seen is that the antenna element inside the wood is a modified 
piece of coax stuck up into the wooden mast.If the sheath were 
isolated,would it be then "invisible" to the antenna circuit?Or be a 
capacitive element?
  I always considered antennas to be a special case for transmission 
lines (i.e. open the lines 90 deg for dipole) but without documentation 
I am guessing at this case.
 Jay

-----Original Message-----
From: whitaker at pa.net
To: milsurplus at mailman.qth.net
Sent: Tue, 2 Jan 2007 5:19 PM
Subject: Re: [Milsurplus] WWII Aircraft Antenna AN-104-series

de WB2CPN
The frequencies the USAF used for aircraft AM
were between 116.1 and 140.58 MHz. That was
the range from "A" to "D" when I used the SCR-522.
The antenna protruded into the inside of the airframe.
The oval clamp could be on the inside, and was
adaptable to whatever shape the inside of the
airframe was. The antenna didn't work very well
without a solid counterpoise, like a metal airplane,
but I've seen a lot of them stuck on metal pipe for
ground facilities, like Base Ops and Control Towers.
Knowing what I know now I'd have put four radials
on there. The antenna matching was a technical
wonder. It's all inside there.
73 Clete

______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net
________________________________________________________________________
Check out the new AOL.  Most comprehensive set of free safety and 
security tools, free access to millions of high-quality videos from 
across the web, free AOL Mail and more.