[TenTec] A grounding question

[Martin AA6E]

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