I know the new version of Eznec 4.0 handles this but does anyone know the correction factor for insulated it is about 95% but does anyone know for sure? 73, Bill W4ZV ________________________________
Thanks for many responses! They were in unanimous agreement that the resonant frequency is raised by about 3% for insulated versus bare wire. 73, Bill W4ZV ___________________________________________
log cell feed. Has anyone done this? It is a formidable project for a an inexperienced modeler. This TH-6DXX model by K9UWA is the closest thing I've seen to what you want: http://www.kkn.net/~k5tr/t
Somewhere I got the following formula for a cylindrical equivalent to triangular tower like Rohn 45. Equivalent Cylindrical Diameter = 2 * CUBEROOT [(D * F^2)/2] where D = tube diameter and F = Face
I successfully modeled my stack of monobanders on 10. Now I would like to look at the pattern when rotating each separately. Does anyone know an easy way to do this in EZNEC? If I try the Macro rotat
Rotating antennas is possible with K6STI's AO but not with EZNEC. Thanks to K9UWA for doing a few plots for me with AO. Attached is a response from W7EL. 73, Bill W4ZV I'm sorry, but there's no easy
Has anyone modeled KLM monoband antennas (not linear loaded ones)? If so I would appreciate a copy of your models for EZNEC...also any optimization of their recommended dimensions. Please reply direc
copy of EZNEC (or ....) and start modeling. A Russian friend recommended MMANA as being much easier than Eznec but using the same NEC-2 engine. Since it is free, it would certainly be worth a try for
I forgot to add the NEC-2 link: http://www.qsl.net/ua3avr/ 73, Bill W4ZV _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
I've been modeling my array for 160 and was surprised to see a difference in maximum gain of 0.39 dB for "Zero Loss" in Eznec 3.0 versus "Zinc" for my tower. Does this sound reasonable? I would not h
K5GO: would show, I put in the element lengths, spacing and diameters for the WA3FET design OWA yagis and was surprised to find that YO7 showed something entirely different than what WA3FET shows as
are any snakes in the grass that I am missing? Sam, you might contact Randy W0MJ or Bill N4AR. Randy had a phased bobtail on 80m in the early 80's and I believe Bill also had one a little later. Neit
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Tony, I think we are saying the same thing. A 3 el Yagi (on a 1.8 X 8' = 14.4' boom) should be very close to a 2 el Quad on an 8' boom. Regarding anecdotal comparisons, I would simply note that none
(0.205 and 0.142 lambda respectively) and got free space gains of 7.4-7.5 dBi. My design criteria were maximum gain and a reasonable match to 100 ohms. How much gain are you observing for two and thr
K9AY: diameter "solid wire" for the 25G tower (I used 5 inches). That sounds too small. Here's the formula I used to model my 160 vertical made of Rohn 45: http://lists.contesting.com/archives//html/
Hi Gary, K9AY: radius of Rohn 25 tower: Proceedings, 14th Annual Review of Progress in Applied Computational Electromagnetics ("ACES" Conference), Monterey, CA 1998. I've found a reference for the fo
said it originally came from IEEE Transactions on Broadcasting, but I don't have the exact chapter and verse. You might ask W1FV. After a little more searching: If you have access to the June 1998 is
W5XZ: get a pretty nice swr / freq bandwidth with it fed DIRECTLY with 50 ohms. was thinking of applying the 'owa' approach with an additional director, closely spaced to the driven element, but it d
From the YO file for the KLM620: "See NICE5.YAG and NICE6.YAG for single-driven designs with superior performance on the same boomlength." (These are two other models in YO). I attempted to copy the