We've discussed the measuring of things like antenna traps, and we've had varying levels of success. https://www.mwrf.com/test-measurement/make-accurate-impedance-measurements-using-vna Discusses thr
Author: Edward Mccann via TowerTalk <towertalk@contesting.com>
Date: Tue, 30 Jul 2019 16:32:42 -0700
How about advice on measuring impedance offered to common mode current in coax with a one-port and two port VNA? Ed McCann AG6CX Sent from my iPhone _______________________________________________ __
Ed McCann AG6CX As always, fixtures are the tricky part. If you wanted to measure a 3,4, or more terminal device, then it probably is more complex. Devices like RF transformers especially with a cent
I think K9YC has a lot to say about measuring in his HF choke guidance. Great work! If I understand the question correctly here is what I found. My interest is expanding into VHF/UHF and I began a se
I was going to recommend anything written by Kurt Poulsen about the VNWA. He is to it what Rudy Severns is to vertical antennas. Wes N7WS If I understand the question correctly here is what I found
Author: Edward Mccann via TowerTalk <towertalk@contesting.com>
Date: Tue, 30 Jul 2019 22:16:56 -0700
In fact, common mode impedance through a common mode choke (read 1:1 current Balun) actually involves the inside of the coax shield, the outside of the coax shield, and the center conductor. So, how
http://k9yc.com/2018Cookbook.pdf There's a photo of a well thought-out test fixture here. Scroll to the very bottom of the page. http://www.karinya.net/g3txq/chokes/ The author succumbed to cancer a
Hi all, As Jim knows, I've spent some time investigating and learning how to measure chokes correctly. That was a year or two ago. Transformer type baluns are more difficult to measure with a two por