I have a question about bifilar chokes from K9YC's Choke Cookbook... Several places in K9YC's material indicates that bifilar chokes wound with close spaced enameled wire would have an impedance of a
This is correct. BTW -- I first noted the Zo of these two chokes in a later version of Jerry Sevick's (W2FMI) book. Quite a few years later, I built and measured similar chokes and confirmed his resu
Hi Jim and all, The email below reminds me of a problem I had some years ago with "450 ohm window line". Nothing seemed to work. I then found an article that explained how to measure the Zo of coax/l
If you follow this link http://k6mhe.com/n7ws/Ladder_Line.pdf to my paper and look at Table 1, it gives the measured values of four different Wireman P/Ns. Note that these are 50 MHz values and trans
And with the easy availability of powerful test gear at relatively low cost, combined with AC6LA's fine Excel spreadsheets, it's easier than ever to get good data for VF and Zo vs frequency from a fe
Author: Dan Maguire via TowerTalk <towertalk@contesting.com>
Date: Mon, 6 Feb 2017 06:32:31 +0000 (UTC)
As a follow-up to what Wes said, his measurement results were used to derive the Zo, VF, and loss data for Wireman ladder line as contained in TLDetails/Zplots/AutoEZ/SimSmith and a few other places.
Regarding weapons of choice, I am not sure if you know this nice portable device: http://www.deepace.net/ 73, Maximo And with the easy availability of powerful test gear at relatively low cost, combi
Thanks Maximo. I was not aware of it, but it's description is deceptively wrong. It's advertised as a Vector Network Analyzer, but the description says that its S21 measurements are scalar. So it's N
At the time I made the original measurements my instrumentation (HP-8510) had a low frequency limit of 45 MHz and I had a space limitation. Consequently, I couldn't measure at the frequencies where l