I am building a wire array using insulated wire (copper clad steel +
jacket). The insulation will change the velocity factor of the wire and
therefore change the required lengths of the elements. EZNEC does not have
an option to calculate the actual lengths required, and I am wondering if
there is any way to do this? It will be very difficult (and expensive) to
change the antenna once erected, and as the effect would be primarily on the
array pattern rather than the feed SWR it would be hard to 'tweak'.
I have seen suggestions that wires should be 3% shorter or 5% shorter but
then cut and try - that is a lot of difference!
Any suggestions would be gratefully received.
73 Roger
VE3ZI
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