As a generalization that isn't true. It would all depend upon the
conductivity of the "copper tarnish". If the tarnish was highly
conductive it wouldn't matter of course, and if the tarnish was an
insulator the current would just travel beneath it as you say. But if
the tarnish was mildly conductive ... i.e., lossy ... it would have an
effect if it was thick enough and the skin effect shallow enough. In
this case, of course, the thickness of the tarnish is likely much less
than the skin effect depth.
Dave AB7E
On 10/14/2016 5:15 AM, Jim Thomson wrote:
### Dull and tarnished has zero effect. The rf current simply travels beneath
the tarnish.
Jim VE7RF
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