Hello again. This will be a relatively short message. I have read most of the comments on the Towertalk reflector regarding my article in Communications Quarterly. Some of you have also been kind eno
I would like to thank Tom for his apology. It is very much appreciated. As I said to Tom, his technical comments are always welcome. Steve I apologize to Steve Best. It is wrong to let personal opini
Hello All: Actually, the first statement above is more correct. When an antenna intercepts a signal, it develops a voltage across its terminals which then "drives" the feeder transmission line. The l
Just a quick response to this issue. Cushcraft Corporation currently uses several commercially available programs, including NEC4, to design and model our antennas. We really just began to think abou
Just a quick response to this issue. Cushcraft Corporation currently uses several commercially available programs, including NEC4, to design and model our antennas. We really just began to think abou
I apologize that this is a bit long, but I consider this to be important. I would like to comment on the remarks made by Walter Maxwell (W2DU) regarding statements I made about mismatch loss and tune
Just a follow up to Jim's comments: "reflection cases, This statement is made without any background information. To have an adequate discussion on the performance of broadcast stations, we would hav
Hi Tom: Thanks for the comments. 1. In my long post (sorry again), I did include matched line loss in my final statements - please check again. I think I compared the two cases with equal one way los
I think Hank (KN6DI) has made a few good points. With the exception of responding to the question posted by Pete (N4ZR), this will be my last post on this subject for awhile. After this post, I think
Pete: Let's start with the simplest case. The 50 ohm antenna fed with 50 ohm coax, balun (1:1) and 50 ohm transmitter. Let's first assume that the coax and balun are lossless. If we deliver 1000 Watt
Paul: In response to your direct question, I associate voltage directly with the term wave. An EM wave having a certain "voltage" and "current" is traveling along the length of the transmission line.
In an effort to finally end discussion of this topic on the reflector, we conducted an experiment to compare the performance of a matched antenna to that of a mismatched antenna with tuner. This post
First, I will say this again and again. Art's departure from Cushcraft has no bearing or impact on Cushcraft's amateur production nor our engineering effort. The XM240 and other monobanders are not y
Gentlemen: The X9 40 meter add on kit will begin shipping to dealers next week. Yes, as posted by W8EB, the 40 meter add on kit is a single element not two elements. As far as Cushcraft "promising" t
To Will, Terry and the entire TowerTalk group: As President of Cushcraft, I try to avoid getting into all of the day to day details of things such as the content of our instruction manuals and web pa
X9. > He tried to implement a two element solution but it was not X9 > performance on the other bands. We were not willing to make the to > provide an inferior two element solution. Gee, Force 12 can
Directivity of an antenna does come from antenna geometry. If an antenna is 100% efficient it will have a gain equal to its directivity. Gain is simply the antenna directivity * efficiency. Reduction
______________________________ Reply Separator _________________________________ "The effect of "reflected waves" or mismatches on the feedline and antenna system is only that apparent power handled
______________________________ Reply Separator _________________________________ Subject: Re: [TowerTalk] Steve's antenna study Author: "Jim Reid" <jreid@aloha.net> at InterNet To: <towertalk@contest
Hi Again: Two more things I would like to comment on: Some people have made the statement that reflected power eventually gets radiated (with the exception of cable loss) because the power goes back