One can feed the 43 foot vertical with ladder line, and do the tuning in
the shack (yes, you can feed a vertical with balanced line), but if
feeding with coax, the best place for the matching network is at the
base of the antenna. Coax is good for an swr of 2.0 or less (depending
on the frequency). If the SWR is greater than that, some kind of
matching device at the base of the antenna is in order.
Ladder line feed OTOH is quite OK with an SWR of 20:1 if it is properly
routed - away from conducting surfaces by at least 3 times its spacing
and similarly away from the earth.
Again, yes, balanced feedline is an alternative for vertical antennas -
the antenna may be *unbalanced*, but the feedline does not care, You
still need balanced current and return current for the antenna to
functon correctly.
73,
Don W3FPR
On 9/2/2013 7:12 PM, Philip Townsend Lontz wrote:
Good question... I would like to know too.
A wise man once said nothing....
On Sep 2, 2013, at 5:10 PM, Jim Brown <[email protected]> wrote:
43 ft verticals have become a popular antenna, and while they have some strong
points, they present a very high SWR on most bands, so they require a serious
tuner to get them to load.
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