Topband: Silver Plated Conductor

[LA5HE Ragnar Otterstad]

GEORGE WALLNER wrote:

>Would silver plating the conductors make a practical 
>difference? There is no significant heating of the 
>conductors now with full legal power.  
>

Before you consider silver plating a coil, here is something you should 
know.  At 2 MHz the RF skin depth in silver is 0.00178 inches.  You need 
about three skin depths of plating, that's about 0.0053 inches.  If you 
just walk into a plating shop and say, here silver plate this, you will 
get about 0.00002 inches.  "Highly polish-able" grade silver plating is 
0.001 inches and costly. You need 5 times that.  It's going to be 
expensive.  Most ham coils used at low frequencies are silver plated 
just for appearance purposes.-

---------------------------

In marine transmitters all coils I have seen were silverplated. My
understand is that 
2-3 mikron was used, whatever that is in medival terms.
73  Rag LA5HE




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