TopBand: Re: EWE Info

[Earl W Cunningham]

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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