[Amps] Copper Pi tank coil oxidisation

[Richard]

>Hi Mark,
>
>I built one amplifier with 3x QB5/1750 in 1977 .
>All coils are copper-tubing 9-12 mm, being dull brown already 
>for a long time.
>So far I never measured any change in efficieny from the beginning.
>Probably coating is only cometic value, but who cares ?
>
There are Hams who build fashion-amplifiers to impress their friends.

cheers, Peter

-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, 
www.vcnet.com/measures.  
end