I'm pleased that Rob specified "in a HF tank circuit" for his comment "they are
so nearly the same that copper strap is good enough; silver just looks pretty
and impresses people."
Silver does look pretty and so does copper. Soon, I will post a photo about an
incredible silver plated cavity that I bought for work. For VHF, where all the
RF current remains in the skin ~ thousandth of an inch thick,
its important to maintain low resistance for the life of the amplifier, say 30
years. Silver plating appears to be best.
73
John
K5PRO
> Message: 2
> Date: Tue, 22 Mar 2011 10:42:48 -0500
> From: Rob Atkinson <ranchorobbo@gmail.com>
> Subject: [Amps] copper vs steel /SS /brass conductors in a HF tank
> circuit
> To: amps@contesting.com
> Message-ID:
> <AANLkTinAWzLNmnWpHCJDHzk4+wHRNe6ZpPx2WpcmwDTD@mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> steel and s.s. are ferrous metals; they heat up with enough RF
> current. Too much R. OTOH if you look at conductive properties of
> silver and copper (undergraduate introductory physics book) they are
> so nearly the same that copper strap is good enough; silver just looks
> pretty and impresses people.
>
> 73
>
> Rob
> K5UJ
>
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