TT: I was going through some old mags in the basement today and found a couple of articles of interest (I hope) to TowerTalk related to Yagis. They are both from the June 1991 issue of IEEE's Antenna
A typical broadcast curtain array will have a gain of 21 dBi with a bandwidth of about 10°. I guess that's why super long Yagi's are not used. I'm waiting for some fancy contest outfit to come on
I run into W6VPH in the hallway at work from time to time. He has a picture of that 13 element array above his desk at work and his eyes really light up when he describes the performance. The array w
And one of the big problems with such antennas for contest use is that the 3 degree bandwidth is too narrow for optimum coverage in Europe, where you need to "bathe" as many potential contacts with a
Gene, According to Brian Beezley, K6STI, this long Yagi antenna was designed and optimized with his YO (Yagi Optimizer) software. In fact, the program has the "W6TSW" antenna in the demonstration fil
Hi Joe, can you elaborate on agreement between software designs and actual antennas? VHF antennas allow close verification and measurements. Yuri, K3BU
Joe: Thanks for the note. You're right regarding K6STI's influence on this project. The original article has a footnote that states: quote The authors thank B. Beezley for the full NEC final analytic
Hi Yuri, Using the same software that W6TSW used, YO, one can easily scale any Yagi from band to band (frequency to frequency) with ease. I have found excellent correlation. I have scaled numerous VH
Are you then saying that in order to obtain the same percentage of bandwidth on 20M the elements should be about 2.5 inches in diameter? What would it be using realistic diameters? Geoff wavelength s
Hi Joe, thanks for the info and encouraging news about correlation with real life (2m) models. Yes, it is interesting how many possible solutions there are within the antenna design, and how easy it