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1. [TowerTalk] Shadowing of small antennas by larger ones? (score: 1): Author: aunwin@fgi.net (art unwin); Date: Fri, 02 Feb 2001 00:04:22 -0600; This is incorrect when speaking of multi (high density) elements or optimum elements per array wavelength. When you have multiple directors then multiple reflectors DO assist the gain as well as INCR; /archives//html/Towertalk/2001-02/msg00030.html (9,862 bytes)
2. [TowerTalk] Re: (score: 1): Author: aunwin@fgi.net (art unwin); Date: Sat, 03 Feb 2001 08:43:26 -0600; I thought I would add some specific pertinent data in response to your question (words are always cheap) A beam with 13 directors, 3 being reflectors on approx 1 WL boom gives a PEAK F/B of over 60; /archives//html/Towertalk/2001-02/msg00090.html (10,122 bytes)
3. [TowerTalk] Re: (score: 1): Author: aunwin@fgi.net (art unwin); Date: Sat, 03 Feb 2001 10:33:51 -0600; Geo, I suppose one has to know what the target is ! One could assume that NF is the primary factor in EME. The fact that they even offer multi reflectors would suggest that such designs DO have a pla; /archives//html/Towertalk/2001-02/msg00094.html (9,623 bytes)
4. [TowerTalk] Re: (score: 1): Author: aunwin@fgi.net (art unwin); Date: Sun, 04 Feb 2001 08:47:06 -0600; Exactly Peter, tho the original question was related to physical length of reflectors Peter Personaly the idea of one null at one specific frequency is not really the 'true' measure of any antenna. W; /archives//html/Towertalk/2001-02/msg00109.html (10,718 bytes)
5. [TowerTalk] Re: Yagi's (score: 1): Author: aunwin@fgi.net (art unwin); Date: Sun, 04 Feb 2001 12:37:25 -0600; Tom , You didn,t answer the above questionS! And they were very good questions and very pertinent to the main theme of this thread In a forum, standing on a box with an 'OH yayyy" like Andy Capp jus; /archives//html/Towertalk/2001-02/msg00114.html (13,440 bytes)
6. [TowerTalk] Re: Yagi's (score: 1): Author: aunwin@fgi.net (art unwin); Date: Mon, 05 Feb 2001 12:31:18 -0600; I did ? I used the word " can't" ? I wish you had specifically mentioned that sooner. Ofcourse, that is completely incorrect as a single statement on it,s own I am bemused that no one took me to task; /archives//html/Towertalk/2001-02/msg00131.html (15,937 bytes)
7. [TowerTalk] Re: Yagi's (score: 1): Author: aunwin@fgi.net (art unwin); Date: Mon, 05 Feb 2001 13:45:57 -0600; Hi WES Yes, you are quite correct. When I tentively brought the subject up previously I was wallopped by Tom in a similar debate. He was more agile than a blue arse fly on a hot window pane and I cou; /archives//html/Towertalk/2001-02/msg00133.html (9,909 bytes)
8. [TowerTalk] Re: Yagi's (score: 1): Author: aunwin@fgi.net (art unwin); Date: Mon, 05 Feb 2001 16:06:22 -0600; WHOOPS..............I made an error(s) Please up date as follows: Gain is dbi,(not db). Real ground translates to approx 13 dbd. When comparing to Force 12 data ie 'net gain' reduce by 5.5db F/B shou; /archives//html/Towertalk/2001-02/msg00140.html (9,624 bytes)
9. [TowerTalk] Re: Yagi's (score: 1): Author: aunwin@fgi.net (art unwin); Date: Mon, 05 Feb 2001 19:25:45 -0600; No,No,No! Tom. I respect your opinion. We all view our own baby with some distorted affection and it is always the right thing to obtain second opinions even if it hurts. As far as a to do about noth; /archives//html/Towertalk/2001-02/msg00144.html (10,642 bytes)
10. [TowerTalk] Re: Yagi's (score: 1): Author: aunwin@fgi.net (art unwin); Date: Tue, 06 Feb 2001 11:37:30 -0600; Well hi Joe, Thank you so much for stopping by, I delayed in reading it because of some inner fears which now appear to be unfounded. I have visited G3SEK pages many times on long boom antennas which; /archives//html/Towertalk/2001-02/msg00167.html (22,692 bytes)
11. [TowerTalk] Re: Yagi's (score: 1): Author: aunwin@fgi.net (art unwin); Date: Tue, 06 Feb 2001 11:44:19 -0600; No that is not the gain I listed. There is enough misinformation going around already with respect to units. As a contributor you should correct with reasons explaining why . That way we all learn.; /archives//html/Towertalk/2001-02/msg00168.html (11,485 bytes)
12. [TowerTalk] Re: Yagi's (score: 1): Author: aunwin@fgi.net (art unwin); Date: Tue, 06 Feb 2001 11:56:35 -0600; Nice of you to take the time but frankly it really has some merit if you look into my past. When I retired I siezed on antennas as a new hobby. Obtained a couple of antenna patents where I had to mak; /archives//html/Towertalk/2001-02/msg00171.html (8,759 bytes)
13. [TowerTalk] Re: Electronic wrapping mechanics (score: 1): Author: aunwin@fgi.net (art unwin); Date: Tue, 06 Feb 2001 20:30:22 -0600; Can anyone state what the true duty /function is for metalized mylar wrapping (static prevention/avoidance/grounding) ? Seems obvious, right ! My first instinct was that it was just aluminised coatin; /archives//html/Towertalk/2001-02/msg00184.html (7,520 bytes)
14. [TowerTalk] Re: Yagi's (wrapup) (score: 1): Author: aunwin@fgi.net (art unwin); Date: Fri, 09 Feb 2001 10:51:26 -0600; A big thanks to Joe for his input and time There are many "big boys " who have contributed to the envelope on yagi's and I also put Tom Rauch right up there with the experts. All of this is not about; /archives//html/Towertalk/2001-02/msg00249.html (8,451 bytes)
15. [TowerTalk] Ideal Antenna rejection characteristics (score: 1): Author: aunwin@fgi.net (Arthur Unwin); Date: Mon, 15 Jan 2001 14:36:17 -0600; A review of presently offered H.F. Yagis show in general >20 db for F/B or F/R ACROSS a band One antenna manuf points to a a 38 db MAX which one may assume means a steep fall off either side. The Ant; /archives//html/Towertalk/2001-01/msg00370.html (8,080 bytes)
16. [TowerTalk] PROP PITCH -bell gear info needed (score: 1): Author: aunwin@fgi.net (art unwin); Date: Sat, 27 Jan 2001 15:32:19 -0600; Hello Marc, Prop pitch ruined ???? Not so ! There is a brake that originally came with the prop pitch that many hams did not connect up. Mine handles the wind with a 35 foot boom plus 13 elements wit; /archives//html/Towertalk/2001-01/msg00702.html (9,258 bytes)

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