[Amps] copper vs steel /SS /brass conductors in a HF tank circuit

[Al Kozakiewicz]

All stainless steels are ferrous and I would think that they'd thus all be subject to RF heating.

The 300 series alloys have, in general, a higher percentage of chromium and nickel and are not magnetic. Some of the 400 series alloys have nearly as much but are magnetic.  In either case, the Fe content is still around 70% or more.

Al
AB2ZY

________________________________________
From: amps-bounces at contesting.com [amps-bounces at contesting.com] On Behalf Of Jim Tonne [Tonne at Comcast.Net]
Sent: Tuesday, March 22, 2011 1:54 PM
To: Rob Atkinson; amps at contesting.com
Subject: Re: [Amps] copper vs steel /SS /brass conductors in a HF tank  circuit

I just checked with one of the fellows who has designed his
share of high-power HF rigs and he says brass is the way
to go.   It is usually cadmium-plated to "keep it shiny looking."

Apparently there are varying grades of "stainless" steel and
some of them are truly bad in RF.   High grade SS is OK but
since you can' tell easily the rule was to simply avoid it.

This note concerns the nuts and bolts used to hold the
assembly together.

- Jim W4ENE






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