Mike Bryce wrote:
...
>
> I was always under the idea that skin effect only occurs on
> frequencies higher than 30 mhz.
>
> So, what do the experts say??
>
Don't know about any "experts" here, but my ITT Radio Engineers Handbook
gives a skin depth of 2.6 mils (0.0026 inch) at 1 MHz for copper. So at
HF frequencies and higher, most all the current flows in the top (say)
10 mils of the copper -- any copper below that doesn't help very much.
Pound for pound and dollar for dollar, thin/wide strap gives the lowest
impedance connection.
Even at 60 Hz, the skin depth is sometimes important - about 1/3 inch.
73 Martin AA6E
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