Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Stacking\s+question\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Stacking\s+question\s*$/: 31 ]

Total 31 documents matching your query.

21. [TowerTalk] Stacking question (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Tue, 9 Aug 2016 09:26:43 -0700; There is a lot of information about stacking in books such as W2PV's Yagi Antenna Design. John KK9A the top 20m yagi at 150 ft. Then tried the bottom yagi at 65/75/85 ft. On his software, the gain pe; /archives//html/Towertalk/2016-08/msg00106.html (9,812 bytes)
22. Re: [TowerTalk] Stacking question (score: 1): Author: "Ed Sawyer" <sawyered@earthlink.net>; Date: Tue, 9 Aug 2016 12:48:04 -0400; I could be wrong, but I believe that HFTA adds 3dB for stacked antennas and uses the center point of the stack to do its calculation. I base that on the fact that you can stack 2 yagis at the same po; /archives//html/Towertalk/2016-08/msg00107.html (9,500 bytes)
23. Re: [TowerTalk] Stacking question (score: 1): Author: n1rr@comcast.net; Date: Tue, 9 Aug 2016 16:52:30 +0000 (UTC); The "optimum" stacking distance is related to gain. Higher gain antenna require more spacing to prevent the wavefronts from cancelling. K1EA suggested back in the 90's to space HF monobanders by appr; /archives//html/Towertalk/2016-08/msg00108.html (12,192 bytes)
24. Re: [TowerTalk] Stacking question (score: 1): Author: Russ Dearmore via TowerTalk <towertalk@contesting.com>; Date: Tue, 9 Aug 2016 17:32:14 +0000 (UTC); Something I do for my own personal convenience for my telescoping US TOWER is to tape a run of electricians "True Tape" made by Greenlee to the vertical coax run which will always tell me exactly at; /archives//html/Towertalk/2016-08/msg00109.html (9,168 bytes)
25. Re: [TowerTalk] Stacking question (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Tue, 9 Aug 2016 13:33:31 -0400; I recall a whole chapter on W2PV's book which showed graphs of various stacking distances. I am sure that there are other good publications. I suggested this book to NY6DX because I find reading the; /archives//html/Towertalk/2016-08/msg00110.html (9,289 bytes)
26. Re: [TowerTalk] Stacking question (score: 1): Author: "David Robbins" <k1ttt@arrl.net>; Date: Tue, 09 Aug 2016 17:35:17 +0000; Also... at least for contest operation it is not max gain that is important, it is making sure there are no nulls in the expected takeoff angle pattern to your target area. For this area that means m; /archives//html/Towertalk/2016-08/msg00111.html (14,870 bytes)
27. Re: [TowerTalk] Stacking question (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 9 Aug 2016 10:51:44 -0700; That's my understanding as well. You may find that ideal stacking distance puts the combined lobe at the wrong height. The 1dB or so of stacking variance for a normal range of stacking distances me b; /archives//html/Towertalk/2016-08/msg00112.html (10,487 bytes)
28. Re: [TowerTalk] Stacking question (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Tue, 9 Aug 2016 14:13:54 -0400; I am saying that HFTA is not a good tool for modeling stacking distances. I also disagree with your max distance stacking numbers. Sent from my Smartphone. ___________________________________________; /archives//html/Towertalk/2016-08/msg00113.html (10,072 bytes)
29. Re: [TowerTalk] Stacking question (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 9 Aug 2016 14:47:39 -0400; On 8/9/2016 12:48 PM, Ed Sawyer wrote: I could be wrong, but I believe that HFTA adds 3dB for stacked antennas and uses the center point of the stack to do its calculation. I base that on the fact th; /archives//html/Towertalk/2016-08/msg00114.html (9,689 bytes)
30. Re: [TowerTalk] Stacking question (score: 1): Author: Randy Lake <randyn1kwf@gmail.com>; Date: Tue, 9 Aug 2016 20:08:01 -0400; My feeling is that the antenna manufacturer is the one to get the stacking distance data. From there one can use HFTA to get an approximation of stack hight. Randy N1KWF -- Randy Lake N1KWF 73 Gunn R; /archives//html/Towertalk/2016-08/msg00116.html (11,275 bytes)
31. Re: [TowerTalk] Stacking question (score: 1): Author: "David Robbins" <k1ttt@arrl.net>; Date: Wed, 10 Aug 2016 00:43:01 +0000; The problem is there are 2 (major) different goals in stacking... max gain, which you can really only estimate in free space or above a perfect flat earth, or for very high vhf arrays... or covering; /archives//html/Towertalk/2016-08/msg00117.html (13,041 bytes)

Current List: 21 - 31
Page: [1] [2]