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

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+phasing\s+antennas\s*$/: 11 ]

Total 11 documents matching your query.

1. [TowerTalk] phasing antennas (score: 1): Author: lu6beg@canopus.com.ar (Ernesto Grueneberg); Date: Wed, 28 May 1997 15:57:43 -0300; Hello I understand that when you want to get gain from a couple antennas, you phase them using equal lenghts of cable. But when you want to split power to cover more than one direction, is still nece; /archives//html/Towertalk/1997-05/msg00688.html (6,869 bytes)
2. [TowerTalk] phasing antennas (score: 1): Author: Gregg Seidl <k9kl@direcway.com>; Date: Mon, 14 Mar 2005 14:18:29 -0600; I have a fairly simple question but one I'm not familair with at low vhf.I want to stack 2 6 meter beams using a stack-match.I purchased a 100 foot peice of low-loss cable figuring I would cut it som; /archives//html/Towertalk/2005-03/msg00292.html (7,474 bytes)
3. Re: [TowerTalk] phasing antennas (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 14 Mar 2005 15:51:52 -0500; with at low vhf.I purchased a 100 foot in the middle then How far apart are you putting the antennas? Do you think it is the same in it.I know at 2 meters. I wouldn't think the Vf would vary much al; /archives//html/Towertalk/2005-03/msg00294.html (7,940 bytes)
4. [TowerTalk] phasing antennas (score: 1): Author: Gregg Seidl <k9kl@direcway.com>; Date: Mon, 14 Mar 2005 19:43:58 -0600; Thanks for all the help!!Just to clarify a few things.The antennas will be spaced 27 feet,as per M2's specs.The top one will be at 70 feet and the bottom one will be at 43 feet.I will be using Philly; /archives//html/Towertalk/2005-03/msg00305.html (7,814 bytes)
5. Re: [TowerTalk] phasing antennas (score: 1): Author: "Frank Donovan" <donovanf@erols.com>; Date: Mon, 14 Mar 2005 23:23:47 -0500; Hi Gregg, Can you borrow a time domain reflectometer? They are widely available these days because of their relatively low cost and widespread use in the wireless and CATV industries, among others. T; /archives//html/Towertalk/2005-03/msg00313.html (11,015 bytes)
6. Re: [TowerTalk] phasing antennas (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Mon, 14 Mar 2005 20:55:18 -0800; If one has a good antenna analyzer that reads both R and X, and you collect enough frequency points, you can calculate what a TDR would have given you. The Fourier transform is used to convert back a; /archives//html/Towertalk/2005-03/msg00314.html (8,362 bytes)
7. Re: [TowerTalk] phasing antennas (score: 1): Author: K4SB <k4sb@bellsouth.net>; Date: Tue, 15 Mar 2005 05:10:50 +0000; -- Good advice. Just a little addition. If you use an analyzer, use as high a multiple of the frequency you want as possible. For example, the MFJ is good to 170 mHz. For 50.1 or so, you'll get a muc; /archives//html/Towertalk/2005-03/msg00316.html (8,615 bytes)
8. Re: [TowerTalk] phasing antennas (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Tue, 15 Mar 2005 08:23:43 -0500; were an odd 1/4 wavelength to make sure they REALLY were the same length. Gregg, I did exactly that for my 3-stack on 10 meters. If you are using one piece of coax, I doubt you even need to do anythi; /archives//html/Towertalk/2005-03/msg00329.html (8,767 bytes)
9. [TowerTalk] phasing antennas (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Tue, 15 Mar 2005 09:23:18 -0500; the pattern is fairly insensitive to slight differences in phase. I recall seeing little difference for ~10 degree phase difference, which is far more error than you would get by simply cutting lines; /archives//html/Towertalk/2005-03/msg00331.html (7,851 bytes)
10. Re: [TowerTalk] phasing antennas (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Tue, 15 Mar 2005 07:28:37 -0800; You can have fairly substantial phasing errors and not have a huge effect on the forward gain. (45 degree difference results in less than 1dB reduction in forward gain) (10 deg is less than 0.13 dB); /archives//html/Towertalk/2005-03/msg00337.html (10,027 bytes)
11. [TowerTalk] phasing antennas (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Tue, 15 Mar 2005 11:06:09 -0500; Jim, none of your examples really apply to the case under discussion. 10 degrees phase difference is simply insignificant in a Yagi stack. I just checked the +/- 10 degree case and it only made a 0.0; /archives//html/Towertalk/2005-03/msg00343.html (8,415 bytes)

Current List: 1 - 11
Page: [1]