Michael Coslo wrote:
Highland Ham wrote:
In the US, copper water pipe comes in three grades, K, L and M, in
increasing order of quality/cost. We also have "DWV" copper pipe for
drains
and vents (non-pressure applications, I guess). Same over there?
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Question : Would any of the above grades of copper pipe affect the RF
radiation characteristics of the antenna ?


The answer depends upon whether you mean an effect that is noticible
or not. ;^)
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My question is directed to the different grades K,L and M ,whether any
particular grade would give better RF radiation performance .
It could be that the grade with the highest copper content gives the
best performance ,although I doubt that it will be measurable.
J-pole antennas I am familiar with are all made of aluminium,but copper
is of course better long term in an outdoor environment and electrical
contacts are reliable following soldering.

Frank GM0CSZ / KN6WH