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References: [ +from:dave@g3ueg.co.uk: 29 ]

Total 29 documents matching your query.

21. Re: [Antennaware] 3-element HF yagi design (score: 1)
Author: David Gould <dave@g3ueg.co.uk>
Date: Thu, 26 Jan 2012 20:06:11 +0000
Dan, Bill, Guy Thanks for your input... It looks like the project may be too big in time and cost if NEC4 license is required. I will have to think further before committing. Thanks again. 73, Dave,
/archives//html/Antennaware/2012-01/msg00008.html (12,208 bytes)

22. [Antennaware] Yagi element capacity hat end loading (score: 1)
Author: David Gould <dave@g3ueg.co.uk>
Date: Sat, 08 Jun 2013 17:00:59 +0100
I have a very small back garden so I am limited in the width of antenna I can erect. I want to try and do better than a minibeam. I am currently using a Cobwebb antenna which is a set of 5 nested dip
/archives//html/Antennaware/2013-06/msg00005.html (8,403 bytes)

23. [Antennaware] Trap design (score: 1)
Author: David Gould <dave@g3ueg.co.uk>
Date: Wed, 29 May 2019 15:18:09 +0100
Yes, I know traps are a compromise and some people don't like them, but my feeling is that it is often the design and construction that are the main problems. I plan to build one for 15m (for a 15m/2
/archives//html/Antennaware/2019-05/msg00010.html (8,193 bytes)

24. [Antennaware] EZNEC how to choose number of segments (score: 1)
Author: David Gould <dave@g3ueg.co.uk>
Date: Fri, 12 Jul 2019 12:56:41 +0100
Most of my modelling has been with wire antennas but now I am modelling some verticals with elements having diameters of between 38mm and 25mm for 20m and 40m (and using drooping elevated radials mad
/archives//html/Antennaware/2019-07/msg00000.html (6,817 bytes)

25. Re: [Antennaware] EZNEC how to choose number of segments (score: 1)
Author: David Gould <dave@g3ueg.co.uk>
Date: Fri, 12 Jul 2019 14:38:54 +0100
Hi Guy, Thanks for quick reply, If I just start with the 20m vertical.  It is 38mm tubing with the base 10m off the ground, the source is in the first (bottom) segment.  Then there are two tuned 1/4
/archives//html/Antennaware/2019-07/msg00002.html (9,358 bytes)

26. Re: [Antennaware] EZNEC how to choose number of segments (score: 1)
Author: David Gould <dave@g3ueg.co.uk>
Date: Sun, 14 Jul 2019 17:10:06 +0100
Hi Guy, Thanks for the detailed information. I don't know how to say this any different way, that the base of the vertical element (38mm tube)  is 10m above ground.  The top 1.5m of the support mast
/archives//html/Antennaware/2019-07/msg00007.html (18,672 bytes)

27. [Antennaware] EZNEC how to model a 4:1 balun (score: 1)
Author: David Gould <dave@g3ueg.co.uk>
Date: Mon, 25 Mar 2024 17:36:49 +0000
I am using Pro/2 v 7.0. I have been through the EZNEC help and the test drive around the track, but the examples are all more complex than I am looking for so I am having trouble getting to the basic
/archives//html/Antennaware/2024-03/msg00000.html (6,970 bytes)

28. Re: [Antennaware] EZNEC how to model a 4:1 balun (score: 1)
Author: David Gould <dave@g3ueg.co.uk>
Date: Mon, 25 Mar 2024 18:49:38 +0000
Thanks to Jay and Joe for the Alternate Zo suggestion.  It certainly gives the revised SWR curve I was expecting. I would also like to know the new impedance after the transformation, which the SWR g
/archives//html/Antennaware/2024-03/msg00002.html (9,610 bytes)

29. Re: [Antennaware] EZNEC how to model a 4:1 balun (score: 1)
Author: David Gould <dave@g3ueg.co.uk>
Date: Mon, 25 Mar 2024 22:12:01 +0000
Jay, Thanks again for the elaboration.  I have now got the impedances from the SWR plot.  I was just changing the Zo from 50 to 200 and the data was not changing, but clicking on the plot again resul
/archives//html/Antennaware/2024-03/msg00004.html (11,943 bytes)

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