[Antennas] How to make an Air Cooled 315MHz antenna

[Gary K9GS]

What is an "air cooled" antenna??


73,
Gary K9GS
-------- Original message --------From: mail at crcomp.net Date: 4/3/18  9:59 PM  (GMT-06:00) To: Antennas at mailman.qth.net Subject: [Antennas] How to make an Air Cooled 315MHz antenna 
Greetings,

http://www.byvac.com/downloads/RLnn/How-to-make-a-Air-Cooled-433MHz-antenna.pdf

shows how to make a 433MHz antenna that's a little over 70mm in length.
433MHz is typically used for radio controlled devices in Europe. While
315MHz is typically used for radio controlled devices in America.
    Very short and very simple whip antennas of this nature are not 
covered in my ARRL antenna books. The lengths also don't seem to jibe
with fractional wave lengths. Does anyone have any ideas about scaling
the 433MHz whip back to 315MHz? The more theory, the better.

73,

-- 
Don Kuenz, KB7RPU

Genius is nothing but a greater aptitude for patience. - de Buffon

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