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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Stacking\s+204BA\'s\s*$/: 21 ]

Total 21 documents matching your query.

1. [TowerTalk] Stacking 204BA's (score: 1)
Author: "Bob Selbrede, K6ZZ" <k6zz@ccis.com>
Date: Mon, 05 Mar 2007 20:59:08 -0800
Hello Tower Talkers, For those of you using stacked 204BA's, what modifications did you make (if any) to the stock 204BA dimensions to make them better suited for stacking? There are a number of vari
/archives//html/Towertalk/2007-03/msg00062.html (7,897 bytes)

2. [TowerTalk] Stacking 204BA's (score: 1)
Author: "Larry Schimelpfenig" <k7sv@comcast.net>
Date: Tue, 6 Mar 2007 07:32:05 -0500
Bob K6ZZ said:"For those of you using stacked 204BA's, what modifications did you make (if any) to the stock 204BA dimensions to make them better suited for stacking?"In the mid 90s adding a second 2
/archives//html/Towertalk/2007-03/msg00064.html (7,522 bytes)

3. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: Bill Tippett <btippett@alum.mit.edu>
Date: Tue, 06 Mar 2007 14:18:45 -0500
K6ZZ: optimized design for a single yagi is not neccessarily the best design when planning to use a pair of them in a stack. True. First determine the stacking distance you want based on HFTA. Next m
/archives//html/Towertalk/2007-03/msg00073.html (7,607 bytes)

4. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: "Bob Maser" <bmaser@tampabay.rr.com>
Date: Tue, 6 Mar 2007 15:29:50 -0500
Now, if you did away with the dual driven element and make it into a 4 director antenna it would really play. _______________________________________________ _________________________________________
/archives//html/Towertalk/2007-03/msg00075.html (9,078 bytes)

5. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: Bill Tippett <btippett@alum.mit.edu>
Date: Tue, 06 Mar 2007 15:42:32 -0500
YO7 disagrees with you. 4 directors might make sense on a 36' boom but not 27.5'. 73, Bill W4ZV _______________________________________________ _______________________________________________ TowerTa
/archives//html/Towertalk/2007-03/msg00076.html (7,639 bytes)

6. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Tue, 6 Mar 2007 21:48:51 +0100
Why should it? What do think will improve? 73 Peter Now, if you did away with the dual driven element and make it into a 4 director antenna it would really play. _____________________________________
/archives//html/Towertalk/2007-03/msg00077.html (7,405 bytes)

7. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: "Bob Maser" <bmaser@tampabay.rr.com>
Date: Tue, 6 Mar 2007 16:44:47 -0500
I was basing it on my 20M KLM Big Stick, which played better with 4 directors on a 57'boom. 27.5 feet on 10 is equivalent to 57 on 20. _______________________________________________ ________________
/archives//html/Towertalk/2007-03/msg00078.html (8,095 bytes)

8. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: Bill Tippett <btippett@alum.mit.edu>
Date: Tue, 06 Mar 2007 17:42:27 -0500
What do you mean by "played better"? Here are the results of 4M iterations of YO7's model of a 6 element single driven element: 2-stack, 6 el on 27.5' boom, single DE (i.e. yours): Frequency 28.0 28.
/archives//html/Towertalk/2007-03/msg00079.html (8,835 bytes)

9. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: "Bob Maser" <bmaser@tampabay.rr.com>
Date: Tue, 6 Mar 2007 19:52:44 -0500
First of all Bill. I have no interest whatsoever in covering the entire band. I don't do CW and I don't do maritime nets. I do ragchewing and casual DXing within 25khz of 14.200. I could care less ab
/archives//html/Towertalk/2007-03/msg00083.html (10,885 bytes)

10. [TowerTalk] Stacking 204BA's (score: 1)
Author: Bill Tippett <btippett@alum.mit.edu>
Date: Tue, 06 Mar 2007 20:40:35 -0500
W6TR: and make it into a 4 director antenna it would really play. could get more performance out of my KLM by eliminating the dual driven element in favor of a single driven element Bob we have a dif
/archives//html/Towertalk/2007-03/msg00084.html (8,077 bytes)

11. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: "Bob Maser" <bmaser@tampabay.rr.com>
Date: Tue, 6 Mar 2007 20:45:44 -0500
I totally agree. IMHO, my 20M KLM Big Stick at 85 feet was the finest antenna I ever owned, right out of the box. With it, and a legal limit amp, there was not a pile up I couldn't bust. It just got
/archives//html/Towertalk/2007-03/msg00085.html (12,085 bytes)

12. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: "Bob Maser" <bmaser@tampabay.rr.com>
Date: Tue, 6 Mar 2007 20:51:01 -0500
I agree with you but I am in the process of optimizing a 205BA, which, as you know, has a 34 foot boom. I can get better numbers by making it a 4 element than leaving it as a 5 element, and boy, can
/archives//html/Towertalk/2007-03/msg00086.html (9,475 bytes)

13. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: Bill Tippett <btippett@alum.mit.edu>
Date: Tue, 06 Mar 2007 21:21:01 +0000
The main feature 7.0 added was global optimization. This insures the simulator looks at all possible permutations and does not get stuck on a local optimization. K6STI published an article about this
/archives//html/Towertalk/2007-03/msg00087.html (8,417 bytes)

14. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: EL34GUY@aol.com
Date: Tue, 6 Mar 2007 22:37:41 EST
The optimized 5 element 205ca is good for 7.3dbd gain if it works out right according to this YO. Is it that far off? _http://lists.contesting.com/archives//html/Towertalk/1997-03/msg00336.html_ (htt
/archives//html/Towertalk/2007-03/msg00088.html (8,232 bytes)

15. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: "Bob Selbrede, K6ZZ" <k6zz@ccis.com>
Date: Wed, 07 Mar 2007 20:06:29 -0800
I'm not sure if my version of YO (YO5) will do the job as described below. I've done the HFTA analysis and the elevation diversity attainable with stacked 20M beams at 100' and 50' is pretty substant
/archives//html/Towertalk/2007-03/msg00099.html (10,615 bytes)

16. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: <john@kk9a.com>
Date: Thu, 8 Mar 2007 18:54:36 -0500
With the hurricanes in Florida, you should also reconsider using a set of guys on your proposed 60' Rohn 65G freestanding tower installation. <snip> A friend of mine on the west coast had a NOS 20M B
/archives//html/Towertalk/2007-03/msg00112.html (8,190 bytes)

17. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: "Bob Maser" <bmaser@tampabay.rr.com>
Date: Thu, 8 Mar 2007 21:14:04 -0500
Yup, IF and when I get the extra sections of Rohn 65 it will have provisions for guying when hurricanes approach. I am still looking for 30 more feet of Rohn 65. _____________________________________
/archives//html/Towertalk/2007-03/msg00113.html (9,289 bytes)

18. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: <john@kk9a.com>
Date: Fri, 9 Mar 2007 17:19:15 -0500
It's not surprising that you notice some F/B degradation. If F/B ratio is important to you, you can minimize the degradation by increasing your spacing distance. Do you have AO? If so, you can optimi
/archives//html/Towertalk/2007-03/msg00122.html (9,466 bytes)

19. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: "Bob Selbrede, K6ZZ" <k6zz@ccis.com>
Date: Fri, 09 Mar 2007 18:20:58 -0800
I do have older versions of AO and EZNEC so perhaps I'll give them a try to see how things look. My guys wires pretty much dictate allowable stacking distance if I want to be able to rotate the lower
/archives//html/Towertalk/2007-03/msg00139.html (11,053 bytes)

20. Re: [TowerTalk] Stacking 204BA's (score: 1)
Author: Cqtestk4xs@aol.com
Date: Fri, 9 Mar 2007 21:27:14 EST
Your comment brings up a good question, as a general rule, does stacking yagis typically result in a lower overall F/B of the array? I wouldn't think so. If done correctly array gain goes up and I ex
/archives//html/Towertalk/2007-03/msg00140.html (8,687 bytes)


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