Morning folks and Happy New Year to all. I am looking for equations, or an on-line calculator, for open-wire transmission line using different size wire. So far, I've struck out. Can anyone offer any
Try this: https://hamwaves.com/zc.circular/en/ Paul, W9AC Morning folks and Happy New Year to all. I am looking for equations, or an on-line calculator, for open-wire transmission line using differen
Folks, I'm looking for info on the impedance of open-wire that uses different size wire. Unless I missed it, everyone is giving info on the usual case of same size wire. Thanks 73 Charlie, k1xx On De
I've not seen an instance of using open wire line using two different wire sizes (i.e., a different wire size of d1 and d2 for each conductor), if that's what you mean. If it is then the answer is he
Zo = 276 LOG 2D/d, where D is the center to center line spacing and d is the wire diameter, and "LOG" is base 10. Rick N6RK Thanks 73 Charlie, k1xx _______________________________________________ ___
1. If you make the wires unequal diameters, then instead of having just Zo, you have two modes, even and odd, which have different characteristic impedances. This comes up all the time when designing
Author: Wilson Lamb via TowerTalk <towertalk@contesting.com>
Date: Sat, 30 Dec 2023 08:39:43 -0800
Paul's link is great!! https://www.rfcafe.com/references/electrical/transmission-lines.htm<https://webmail.centurylink.net/app/Utilities/gateway_url.asp?umsgid=%7Bc87d8533-0c38-4301-a898-7d6c87ab7c67
Older ARRL Antenna Books had those formulas. 73 es HNY, Steve N6SJ Morning folks and Happy New Year to all. I am looking for equations, or an on-line calculator, for open-wire transmission line using
I think we should back up and get more information from the fellow asking for help. It's understandable to assume the question pertains to a pair of wires but open wire line is a term encompassing di
I suspect the popularity of 600 ohms is because that is the standard Z of an open wire voice/telegraphy pair from the 19th century. And *that* is probably determined by the physical size of insulator
On 12/31/2023 7:55 AM, Jim Lux wrote: I suspect the popularity of 600 ohms is because that is the standard Z of an open wire voice/telegraphy pair from the 19th century. And*that* is probably determi
I used 2" spacing on my acrylic plastic spacers, with 20 gauge solid copper wire, so maybe 200 Ohms impedance? But with it I could load all bands with my tuner from 80M-10M. 73, Steve N6SJ I think we
This guy has a whole bunch of information on how and why the twisting was done: https://the-electric-orphanage.com/wp-open-wire-transpositioning-systems/ Credit to Google University :-) 73, Mike W4EF
The fundamentals of this have been well known since the earliest days of telephony (19th century). I put this tutorial together about 20 years ago, inspired by Jim Hayward's work, cited as a referenc
Of course that will work depending on the matching network and load Z encountered. But we're dealing with RF; not audio despite the recent digression, and the advisory 600 ohm line is intended to be
In private correspondence, K1XX told me he was trying to "de-tune" a tower by dropping down a wire from the top and then connecting it to ground through an adjustable reactance. So the tower is one c
Then this is a question about how to detune a tower. He needs a detuning kit. I faintly recall that there was an article in QST a few years ago about how to detune a tower. BTW if he had asked how t
A tuned skirt is a detuning kit. In essence, the skirt is a coaxial section while a single wire is an open wire line. They work the same way short one end, tune the open end with the appropriate reac
This situation is a textbook case of a very common syndrome where people seeking help with an issue ask some arcane technical question without simply saying what is the end result they are trying acc