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" <si...@sdr-radio.com> To: "'Amsat - BBs'" <amsat-bb@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 _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
