[amsat-bb] Re: @m / &0cms Antennas

[i8cvs]

Hi Simon , G4ELI

Stainless steel is a very bad material to be used to made antennas or
to be used as an electrical conductor because his specific resistivity
is very very high ( 1,61 x 10^-7 )

Since at Radio Frequency the RF current flows only over a thin
surface of the metallic material than the stainless steel could be
used provided it is electrolitically silver plated because the specific
resistivity of silver is the lowest possible ( 1,59 x 10^-9 ) but this
procedure is very costly and the silver over the stainless steel do
not last very much !

Use only aluminum for your antennas as shows the very low specific
resistivity of aluminum as listed on the following address:

http://metals.about.com/od/properties/a/Electrical-Conductivity-In-Metals.htm

73" de

i8CVS Domenico

----- Original Message -----
From: "Simon Brown" <simon at sdr-radio.com>
To: "'Amsat - BBs'" <amsat-bb at amsat.org>
Sent: Monday, April 14, 2014 2:19 PM
Subject: [amsat-bb] @m / &0cms Antennas

> Hi,
>
>
> Are there any crossed Yagi antennas for 2m and 70cms made from stainless
> steel which are available in the UK?
>
>
> My WIMO antennas are ~8 years old and as I'm moving house I'm thinking
> about something better.
>
>
> Looking for ~3m boom length.
>
> Simon Brown G4ELI
> http://v2.sdr-radio.com