- 1. [TowerTalk] 2 el yagi question (score: 1)
- Author: "Tom Osborne" <w7why@frontier.com>
- Date: Thu, 17 May 2012 16:42:51 -0700
- OK, this may be a dumb question, but I've been wondering. Say I put up a dipole going E and W, and there's an S-9 signal on the dipole coming from the South. If I put a director in front of the dipol
- /archives//html/Towertalk/2012-05/msg00193.html (6,768 bytes)
- 2. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: n8de@thepoint.net
- Date: Thu, 17 May 2012 20:40:23 -0400
- Depends ... on height above ground ... spacing between elements ... feed impedance matching ... etc. 73 Don N8DE _______________________________________________ ______________________________________
- /archives//html/Towertalk/2012-05/msg00194.html (7,882 bytes)
- 3. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: "Peter FORBES" <prforbes@bigpond.net.au>
- Date: Fri, 18 May 2012 11:17:24 +1000
- Tom, That's a great "deep and meaningful" question. Assuming the dipole Is currently matched to the feedline then at least two things are going to happen: (1) Because of mutual coupling, the feedpoin
- /archives//html/Towertalk/2012-05/msg00196.html (9,624 bytes)
- 4. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: "W8AEF" <w8aef@q.com>
- Date: Thu, 17 May 2012 18:11:49 -0700
- If the director is about .2 wavelength from the driven element the signal should be S9 + approximately 2 dB. de Paul, W8AEF ZF2JI/ZF2TA FO8DX/FO8PLA 8Q7AA ZX0A VU7RG TX5C A52PP OK, this may be a dumb
- /archives//html/Towertalk/2012-05/msg00197.html (8,368 bytes)
- 5. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: n8de@thepoint.net
- Date: Thu, 17 May 2012 21:26:36 -0400
- That's incorrect. The height above ground will determine the angle of maximum radiation, which will be different than for the dipole alone. He said the dipole was oriented E-W ... so South/North woul
- /archives//html/Towertalk/2012-05/msg00198.html (10,648 bytes)
- 6. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: Tom Osborne <w7why@frontier.com>
- Date: Thu, 17 May 2012 18:31:59 -0700
- Hi Mike I have a 40 meter vertical dipole here and am trying to decide whether to put a director in front or a reflector in the back. 73 Tom W7WHY _______________________________________________ ____
- /archives//html/Towertalk/2012-05/msg00199.html (8,398 bytes)
- 7. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: n8de@thepoint.net
- Date: Thu, 17 May 2012 21:34:55 -0400
- A reflector will give slightly greater f/b and a director will give slightly higher forward gain. It's a toss-up, depending on your requirements. 73 Don N8DE _________________________________________
- /archives//html/Towertalk/2012-05/msg00200.html (9,233 bytes)
- 8. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: "Ron W8RJL" <youngron@verizon.net>
- Date: Thu, 17 May 2012 21:56:20 -0400
- Tom, your original post said a dipole E and W but now you say it is a VERTICAL dipole ??????? Please verify what you are attempting to do. Ron W8RJL _______________________________________________ __
- /archives//html/Towertalk/2012-05/msg00201.html (8,754 bytes)
- 9. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: W0MU Mike Fatchett <w0mu@w0mu.com>
- Date: Thu, 17 May 2012 20:27:10 -0600
- Tom has a vertical dipole and is considering adding a 2nd element. Mike W0MU W0MU-1 CC Cluster w0mu.net:23 or w0mu-1.dnsdynamic.com Http://www.w0mu.com _______________________________________________
- /archives//html/Towertalk/2012-05/msg00202.html (9,971 bytes)
- 10. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: n8de@thepoint.net
- Date: Thu, 17 May 2012 22:32:25 -0400
- That didn't seem to be his original question. Don N8DE _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com
- /archives//html/Towertalk/2012-05/msg00203.html (10,864 bytes)
- 11. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: john@kk9a.com
- Date: Fri, 18 May 2012 06:10:27 -0500
- You can do either. I have used a parasitic reflector with a vertical on the beach as ZF2JB and it worked great. John KK9A / P40A Hi Mike I have a 40 meter vertical dipole here and am trying to decide
- /archives//html/Towertalk/2012-05/msg00206.html (8,211 bytes)
- 12. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: Andy <ai.egrps@gmail.com>
- Date: Fri, 18 May 2012 08:40:59 -0400
- My read is that he now has a vertical on 40 meters, but is considering putting up a horizontal dipole for an unspecified band. He clearly said he has the vertical already, but the question about the
- /archives//html/Towertalk/2012-05/msg00208.html (8,545 bytes)
- 13. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: "W8AEF" <w8aef@q.com>
- Date: Fri, 18 May 2012 07:36:41 -0700
- You will get slightly more gain with a reflector. Tuning a vertical array is easy. Install a sample vertical antenna about 100 feet away, decouple both antennas from their feed lines and connect your
- /archives//html/Towertalk/2012-05/msg00209.html (9,756 bytes)
- 14. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: Jim Lux <jimlux@earthlink.net>
- Date: Fri, 18 May 2012 07:39:11 -0700
- I suppose a similar scheme would work if you wanted to optimize F/B. put the probe system behind the antenna, and adjust for minimum. _______________________________________________ _________________
- /archives//html/Towertalk/2012-05/msg00210.html (9,754 bytes)
- 15. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: "W8AEF" <w8aef@q.com>
- Date: Fri, 18 May 2012 07:42:13 -0700
- That is not my experience. When I designed and built vertical dipole arrays for 20, 17, 15, 12 & 10m I found the reflector arrangement always provided better forward gain. de Paul, W8AEF ZF2JI/ZF2TA
- /archives//html/Towertalk/2012-05/msg00211.html (9,468 bytes)
- 16. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: "W8AEF" <w8aef@q.com>
- Date: Fri, 18 May 2012 07:59:34 -0700
- That is true but remember you can have one or the other - not both. de Paul, W8AEF ZF2JI/ZF2TA FO8DX/FO8PLA 8Q7AA ZX0A VU7RG TX5C A52PP I suppose a similar scheme would work if you wanted to optimize
- /archives//html/Towertalk/2012-05/msg00213.html (8,926 bytes)
- 17. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: Warren Wolff <warrenwolff@aol.com>
- Date: Fri, 18 May 2012 12:28:33 -0400 (EDT)
- As mentioned by one, the Z will change with the added element. In our college days and no brains, we added a reflector to our ground plane to null the plethora of "6" calls. This was in the days of A
- /archives//html/Towertalk/2012-05/msg00214.html (8,178 bytes)
- 18. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: David Gilbert <xdavid@cis-broadband.com>
- Date: Fri, 18 May 2012 10:26:50 -0700
- From what I understand of the theory, a director is capable of slightly (on the order of a tenth of a db) higher gain, but the tuning (spacing and director length) is considerably more critical in or
- /archives//html/Towertalk/2012-05/msg00215.html (11,230 bytes)
- 19. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
- Date: Fri, 18 May 2012 14:22:07 -0400
- Interestingly, virtually all of the 2-element commercial HF Yagis I've seen successfully designed and marketed by manufacturers during my time as a ham have been of the Reflector + DE variety. On jus
- /archives//html/Towertalk/2012-05/msg00216.html (10,708 bytes)
- 20. Re: [TowerTalk] 2 el yagi question (score: 1)
- Author: David Gilbert <xdavid@cis-broadband.com>
- Date: Fri, 18 May 2012 12:09:10 -0700
- I'd add the Force 12 and Optibeam shorty-40's to that list ... probably others I'm forgetting at the moment. The only modern driven/director 2-element yagi I can think of off the top of my head is th
- /archives//html/Towertalk/2012-05/msg00217.html (12,129 bytes)
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