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

[Raymond Cote]

You won’t be a scaling it “back” as the 433 is already shorter (higher frequency ). You will need to make a 315 MHz antenna longer.


Heaven goes by favor.
 If it went by merit,
you would stay out and
your dog would go in.

-Mark Twain

On Apr 3, 2018, at 21:59, "mail at crcomp.net<mailto:mail at crcomp.net>" <mail at crcomp.net<mailto:mail at crcomp.net>> wrote:

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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