I've already received info on Windwood (KP2). I'm gathering information
on possible trips (involving contest weekends). Not interested in emerging
or third world countries! HI! Preferrably Western Hemisphere.
We are gathering information for the future and would appreciate inputs.
Anyone out there with good ideas? Please send email to my home email address
below:
w7kjj@ix.netcom.com
73 de Dave W7KJJ/6 (exop HZ1AB (1954, 77-86), ex KS6DY, ZL1BBA, KG6ICD (Marcus)
KA2ZZ, etc.
>From k2wk@crystal.palace.net (Walt Kornienko) Sat Jun 15 23:10:00 1996
From: k2wk@crystal.palace.net (Walt Kornienko) (Walt Kornienko)
Subject: 40-2CD and modelling in EZNEC?
Message-ID: <199606152210.SAA28983@crystal.palace.net>
Hi David,
Someone (I think K1KP) provided an AO model of the Cushcraft
40-2CD. I attempted to model it in EL/EZNEC using W6QHS's
values for the inductors. The model came close, but no cigar.
I check my system configuration for interaction by modelling
the 40M shorty as a center loaded antenna. I use the element
and boom lengths for the 40-2CD and optimize the value of the
lumped constant for "resonable" gain & F/B values. I know the
antenna doesn't have more than 12 dB F/B and a gain of 4-5 dBd
is a bit optmimistic, but the model is a compromise anyway.
What the model does show is the effect of placing yagis too close
together. The element lengths on the 40-2CD are 44', which is
close to one wavelength on 15M. Placing the antennas a minimum
of 12' apart results in very little interaction (between a my generic
40M antenna and a Hy-Gain 115BA.
Until I learn how to decode AO input data I'll use my generic
2L 40M model for my modelling suites. I really wish someone
had the time, and understood NEC & EZNEC to get an accurate
model of a very popular antenna. (Roy are you listening?)
Happy modelling de Walt - K2WK
*****************************************************************
* *
* 73 de Walt Kornienko - K2WK (FRC) *
* *
* k2wk@crystal.palace.net or K2WK@N2BIM.NJ.NOAM *
* Snail: 52 Sunset Inn Rd Lafayette, NJ 07848 *
* 201-579-1966 (machine) or 201-579-3660 (shack) *
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