[Milsurplus] WWII Aircraft Antenna AN-104-series

[jcoward5452 at aol.com]

Mike,
The grounding scheme of the -104- looks to be far better than that of 
the -74*.Better ground plane makes for better efficiency.And who knows? 
The differant paints could have very different dielectric constants 
which would effect losses too.Back in those days, every new new 
developement was more by experimental results since so little was known 
at the time.
 Jay

I've seen the AN-74, and how similar to the later AN-104 that it 
appears.  Yet,
the VHF AN/ARC-5 manuals explictly state that antennas earlier than the
AN-104-A, -AX, or AT-8/AR should not be used.  That makes me wonder it 
there's
some subtle technical difference between the similar looking AN-74 and 
the
AN-104.

Have you ever measured the SWR response of the AN-74?

73,
Mike / KK5F

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