Actually, the CFA reported in the journal is a serious offering, although at present the theory behind it and the ability to replicate or model the antenna are under serious discussion among a number
For those interested in uses of the half square as a vertically polarized 2-meter antenna, I have added notes on its use in parasitic beams--as well as the use of the bobtail curtain in similar appli
For anyone interested, I have placed a few notes on corner reflectors (for 432 MHz) at my site under the VHF category in the index. Only Part 1 is in place, and I hope to have Part 2 done before the
Due to a bit of luck, I had a chance to finish and install part 2 of the corner reflector notes. I hope they are useful. -73- LB, W4RNL L. B. Cebik, W4RNL /\ /\ * / / / (Off)(423) 974-7215 1434 High
In answer to a request for information on maximizing gain from a corner reflector, I have added part 3 to the series, on optimizing the model. This required just a little rewording and reorganizing i
Johan, ON4ANT, has just sent me an update on his forward stagger array of Yagis on a single mast for 20-10. The new modeled specs--which I confirmed on a different program--are min free space gains o
After several questions about antenna performance in the 3/4-7/8 wl region, I realized that the study I did back in '92 was not readily available. So I added a note on the subject of antenna height a
George, Force 12 has a description of the operative theories behind their antennas--if not at their site, then in their main catalog. Joe's account of the feed system, often called open-sleeve coupli
Please be careful when modeling a multi-band Yagi on NEC-2 (EZNEC/ NEC-Wires), even if there are element length correction factors to compensate for NEC-2's inability to handle diapered-diameter elem
With the appearance of the latest NCJ issue, I have added part 4 of the SCV series to the site--this one on the "open ended cousins," namely the half square. Hope the info is useful to someone.-73- L
In response to several notes, I have added a little more modeling data to the Notes on Cloud Burners (NVIS), including a scan of gain vs. soil type vs. 1 wl loop height and a check of possible advant
Gary, Sorry not to respond sooner, but have been tied up in revising a book MS. I modeled a 2-element DE-Refl beam in FS. The gain was about 6.1 dBi, F-B about 10.7 dB, and the Impedance about 52 Ohm
Bill, Your total beam side tilt of 10 degrees is not fatal, but still less than otimum. Several models average about 0.1-0.2 dB loss of gain and about 1 dB loss of F-B. Impedance change is not great.
Like many others, K6STI's retirement from ham software development leaves a gap in the array of available programs, both in modelding and in RTTY. I hope that his friends will encourage him to return
I have added to the site about 7 new notes, but actually old material from AntenneX for those who do not have access to the on-line magazine (http://www.antennex.com). Some of the notes overlap those
Ted, The transition from 50-75 and 75-50 can be handled in several ways, including ununs. However, there is a fairly simple technique for series matching one cable to another reviewed in an article a
Mike is exactly right. I failed to note--although the article makes clear--that the series matching system using transmission line sections is a monoband matching scheme. For triband and other wide b
For those interested, I have placed some notes on a rotatable extended Lazy-H at the site under the upper HF section as "A Nearly Universal Back-Up Antenna for the antenna Farm tha Has Everything Els
A number of folks have asked me over the past few months to make available some of my quad models. While I do not have an FTP file resource, I did write up a few notes on modeling quads--called for s
Peter, The figures provided by the modeling program regarding power output are not meaningful except with reference to the actual input power used. NEC and MININEC (especially the W7EL versions) have