[Elecraft] elfwa revisited

[W3FPR - Don Wilhelm]

RC,

Yes - double the length and try it, a 48-56 ft random wire with a 32 ft
radial should load fine on 80 and up.  If you find it out of the range of
the KAT1 or KXT1 tuner, just extend is a few feet at a time until you
discover a length that works for you.

Thia is a 'random wire' antenna, it is not an EFLWA which is a more specific
term for antennas that are 1 wavelength or more at the lowest frequency.
The radiation pattern from an End Fed Long Wire Antenna is quite specific
and has lobes at specific and predictable angles from the wire (making it a
directional antenna) - the exact angle depends on the number of half
wavelengths of the wire.  It is this directionality that is the desirable
quality of the EFLWA, quite apart from the means of feeding it.  A really
long long wire antenna can rival a beam in its favored direction, and I'm
certain you have heard rave reports about the performance of large rhombics
which are close cousins to the long wire antenna.  There is a whole chapter
in the ARRL Antenna book devoted to these Traveling Wave antennas - they
work great if you have the space.

73,
Don W3FPR

> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Robert Conley
> Sent: Saturday, March 26, 2005 11:47 PM
> To: elecraft at Elecraft List
> Subject: [Elecraft] elfwa revisited
>
>
> Please me revisit the EFLWA for a moment. In the KXAT1 manual page 9
> shows a random
> length wire in a tree. For 40/30/20 a wire length of 24-28' is
> recommended. Ground
> system use one radial cut to at least 1/8 wave length on lowest band
> used (16' on 40m)
> page 10 shows a Pomona model 1296 double binding post. Since I suffered
> an attack of
> senility when I ordered my K1-2 (I ordered it with 80m and 40m) and a
> KAT1. I wish to
> utilize a random length wire for it Should it be double the KXAT1's
> recommendations
> (48-56') with a ground system  of 1/8 wavelength on the lowest band (32'
> on 80m)
> double that of 40/30/20m.
> tnx es 72/71
> de "rc"kc5wa
>
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