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1. Re: [TowerTalk] Baluns for RX antennas (score: 1): Author: Craig Smith <craig@powersmith.net>; Date: Mon, 23 Apr 2012 08:05:31 -0600; Yes, smaller cores can conveniently be used for RX antennas. I built up some small common mode choke assemblies for use with my Clifton Active Whip antenna. Here is what I ended up with along with so; /archives//html/Towertalk/2012-04/msg00469.html (9,544 bytes)
2. Re: [TowerTalk] Baluns for RX antennas (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Mon, 23 Apr 2012 07:27:33 -0700; out of curiosity.. what was your measurement setup? _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com htt; /archives//html/Towertalk/2012-04/msg00470.html (7,717 bytes)
3. Re: [TowerTalk] Baluns for RX antennas (score: 1): Author: Tod Olson <tod@k0to.us>; Date: Mon, 23 Apr 2012 08:32:54 -0600; Craig: What measurement equipment and set up did you use to determine the Z of the chokes that you built? Do you have any pictures of the measurement setup? Do you have any graphs or data beyond the; /archives//html/Towertalk/2012-04/msg00471.html (10,786 bytes)
4. Re: [TowerTalk] Baluns for RX antennas (score: 1): Author: Craig Smith <craig@powersmith.net>; Date: Mon, 23 Apr 2012 09:15:38 -0600; I'm using an AIM 4170. Accuracy not the best at high impedances. As a rule-of-thumb, I'm comfortable with it to give meaningful measurements up to about 2 Kohms and useful relative results up to 5 Ko; /archives//html/Towertalk/2012-04/msg00472.html (8,178 bytes)
5. Re: [TowerTalk] Baluns for RX antennas (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Mon, 23 Apr 2012 16:40:06 +0100; Tod, That's a nice write-up! I've also used the Spectrum analyser / tracking generator approach - I find the real-time plot instructive for seeing how the SRF swings around with changed lead "dressin; /archives//html/Towertalk/2012-04/msg00474.html (8,383 bytes)
6. Re: [TowerTalk] Baluns for RX antennas (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Mon, 23 Apr 2012 09:55:20 -0700; So you short shield and center together on each end, and then measure across the whole assembly with some jumpers from Coax on AIM to the UUT? Or just the center, or the shield? _____________________; /archives//html/Towertalk/2012-04/msg00481.html (8,515 bytes)
7. Re: [TowerTalk] Baluns for RX antennas (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Mon, 23 Apr 2012 10:21:51 -0700; Whenever the question of baluns for RX antennas comes up, there seems to be a perception that these baluns must be miniature versions of transmit baluns, consisting of common mode chokes (coax loaded; /archives//html/Towertalk/2012-04/msg00482.html (8,505 bytes)
8. Re: [TowerTalk] Baluns for RX antennas (score: 1): Author: Craig Smith <craig@powersmith.net>; Date: Mon, 23 Apr 2012 13:34:19 -0600; I leave the ends of the coax open and measure across the choke with the short test leads attached to the shield at either end. Just like you would measure any inductor. The AIM will then plot Impedan; /archives//html/Towertalk/2012-04/msg00497.html (8,206 bytes)

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