[Antennas] Vertical
Billy Cox
[email protected]
2002年9月28日 16:26:10 -0500
>Might want to read "Antennas Here are Some Verticals on the Beach....."
>by N6BV ("The ARRL Antenna compendium #6", pg 216).
Another good book ... Low Band Dxing by ON4UN ...
Lots of great info to defuse some of the popular ham lore ...
>2-Elevating a vertical, any vertical, even just a little bit, usually pays
>dividends as well. See "Elevated Vertical Antenna Systems: Is your
vertical system performance up to snuff? If not, maybe it needs a lift - in
>elevation above ground that is!". (ARRL "Vertical Antenna Classics, KB8I,
>pg108).
Be careful ... here ... there's more than one variable to consider. Raising
the feedpoint on a 1/4 w vertical may change it's impedance ...
The KB8I work has been debated for many years now. W8JI/ON4UN/and
a "7" station did some real world comparisons. Th NEC models are
off by about 6 dB ... so some, that matters not, to most, it matters much.
73 Billy AA4NU