No significant amount. Certainly not enough to measurably reduce the
efficiency of an antenna, with the possible exception of an antenna with
extremely large currents, like a small loop or possibly a close-spaced W8JK.

Roy Lewallen, W7EL

Al Lorona wrote:
Hi, Everybody,

No. 14 stranded copper dulls and oxidizes badly after a couple of years
up in the air.

Does this have any effect on the RF resistance?

Thank you and regards,

Al W6LX