[AMPS] Silver plating

[Rich Measures]

>Hi all, can anyone explain to me why silver plating is used to 
>decrease loses in tank circuits and so on.  

Above 100MHz, silver plating is probably worthwhile.  A lower 
frequencies, polished copper with a coating of polyurethane varnish seems 
to do okay.  

>Looking at the figures 
>there seems to be a very small difference in resistivity and skin 
>depth between silver and copper.  Is is to reduce losses due to 
>tarnishing perhaps?
>
>Thanks, Fraser G4BJM
>
Silver oxide as well as silver sulphide (tarnish) are good conductors.  
Copper oxide is not.  
Rich---

R. L. Measures, 805-386-3734, AG6K   


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