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[Amps] Copper Pi tank coil oxidisation

To: <amps@contesting.com>
Subject: [Amps] Copper Pi tank coil oxidisation
From: stevek@jmr.com (Steve Katz)
Date: Wed, 8 May 2002 08:27:58 -0700
> Hi
> 
> I'm in the commissioning and measurement stages of my homebrew 
> 4CX1000A amp project (1600W out now and looking good).
> 
> A couple of weeks have passed by since I wound the Pi tank coils
> using 5mm Cu tubing. Since then the copper has gone from shiny
> to dull brown by oxidation.
> 
> Does this matter very much? I guess the RF skin resistance won't 
> be affected very much to affect HF efficiency.
          
        //Far as I can tell, the shininess is of value for photographs only.
However, I used to coat my tank inductors, etc, with a wipe-on silver
plating compound called "Kool Amp," which added a thin silver coating that
stayed bright and attractive for a long time.  I wonder if that stuff is
still made-?

        -WB2WIK/6

> Are there any recommendations for coating Cu tube to keep it 
> shiny and is it worth it (for more than cosmetic value)? 
> 
> 73 Mark G4AXX
> 
> 
> 
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