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[Amps] Copper Pi tank coil oxidisation

To: <amps@contesting.com>
Subject: [Amps] Copper Pi tank coil oxidisation
From: DF3KV@aol.com (DF3KV@aol.com)
Date: Wed, 8 May 2002 11:22:04 EDT
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 ?

73 de Peter, DF3KV


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