>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.
>
? not much but to prevent Cu O from forming, polish the tubing with fine
steel wool and coat with gloss urethane varnish.
>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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>
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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