On Mon, 27 Oct 1997 08:21:09 EST km1h@juno.com (km1h @ juno.com) writes:
>Earl and the group:
>
>I have in front of me a EWE design that was sent to me by Floyd,
>WA2WVL, a few years ago. It may be of interest inasmuch as the values
>differ considerably from Earl's.
>
>For "good soil" 5mm/meter:
>
>Length 50'
>Resistor 1285 Ohms
>Height 10'
>Wire #12
>Frequency 1825kHz
>Inductance 37uh to tune out reactance at feedpoint
>Feed Z 396 Ohms +j7
>Elevation Peak 23 deg
>
>My point here is that there appears to be a lot of discrepancy between
>antenna programs. Floyd uses K6STI's AO and this particular run
>compares well against NEC-Wires.
================================
WA2WVL's design is quite appropriate for the "inverted-U" style of Ewe
(two 10' supports), although I disagree with "396 + j7" -- the positive
reactance is obviously an error. The elevation peak" is also too low --
32 deg is closer for a single Ewe (of either variety) over "good" soil.
The parameters for my version, or "inverted-V" (one 10' support) design
do indeed differ, but it's a different Ewe.
Like Carl, I'm also interested in others' modeling results with different
software versions. I feel that EZNEC or NEC-Wires (both NEC2-based)
would be most appropriate for designing wire antennas with bends in the
wires (such as any variety of the Ewe), although ELNEC or AO (both
MININEC-based) should also yield good results.
73, de Earl, K6SE
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