[Amps] Copper Pi tank coil oxidisation

[DF3KV@aol.com (DF3KV@aol.com)]

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


--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
---