The k9ay behaves just like two short sloped verticals with the same phase shift. Large metal objects affect the antennas performance, so install it in the clear. This site is like a library, use search box in the widget to get ebook that you want. Generally signal strength is much lower on the k9ay than the vertical however, the noise floor is substantially lower as well the signal to noise is often much better the preamp is operable below 7 mhz only in some situations the vertical antenna is better. It works well enough, but id love to get one of these units into the control box at the base of the antenna.
The k9ay terminated loopa compact, directional receiving. Installation instructions ayl4 4way k9ay loop system. This not only shows that one can null a signal on the 90 and 5 sides of the loop in addition to the 180 null, but it seems to confirm a finding made at a grayland, wa dxpediton, namely that the loop has a distinct and relatively sharp front lobe that is more sensitive than settings 45 away. Wellbrook k9ay phased array 500khz to 2mhz the wellbrook k9ay phased array is a sophisticated broadband antenna system, designed for enhanced mw and 160m ham band reception. Although very effective, beverages are often 500 to long, so are not practical for hams with small lots. Click download or read online button to get the beverage antenna handbook book now. The antenna is designed as a portable antenna, for setup during winter months. With this setup i have the option of choosing the best.
One very popular receive antenna is the beverage, which is essentially a very long wire usually about 68 above the ground. May 20, 2017 obviously to support folding, either the antenna wire has to move along the ends of the arms or i have to detach the antenna wire from the base. K9ay the saga of the shared apex loop array sal20 the finished product. Needs the controller and resistor box to complete the antenna system.
Pdf directive, electricallysmall uwb antennas researchgate. Anyway, the main disadvantage is the need of two supports, the ve3do loop is sensitive to the soil properties and it. Then the halfwave dipole is discussed both as an excellent antenna in its own right and as a conceptual tool for predicting the performance of other. Modular antenna switch antenna six to one switch antenna six to one switch kit antenna one to. There are hams who have built 4squares of k9ay loops. It consists of a wire loop of any convenient shape diamond, delta, etc, hung from a single support and with a ground rod at the bottom. Martin francis ndb k9ay mast revised th july, 2004. I have been looking for a good solution to the noise problem on receive and had heard about the k9ay loop antenna. The temporary setup in the garden to test tune the construction.
Download the original paper pdf document from k9ay here. Like k9ay, this antenna is less sensitive to common mode current problems than an usual flag or pennant antenna. K9ay zo fest 2009 ham radio station design intentional design, not accidental. Ive chosen to use a waterproof multiconductor plug to enable quick detachment of the antenna wires from the k9ay control box that will be located at the base of the antenna. This link is listed in our web site directory since saturday dec 14 20, and till today the mini k9ay antenna has been followed for a total of 671 ti. As a lowband fan, i was impressed with the ewe antenna developed by floyd koontz, wa2wvl. By gary breed, k9ay lowband operators are always looking for ways to improve their hearing. So consider the k9ay as an excellent antenna for 160m, where you can boost reception by a couple of db in. Rx antena 4way rx antenna switch k9ay loops k9ay loop feeder with bpfs and preamp rx antena beverages and wire antennas acessories. Here are the instructions for constructing the loop itself. Since then dxers, ham operators and comerical enterprises, all have raved and ranted about this loop, calling it miraculous, stunning and the antenna that beats anything. In my case i dont care how much real estate it takes for antennas as i live in farming country. This antenna was developed using details published here, but with certain modifications.
How to build the k9ay loop receiving antenna ay technologies. Model ayl4 4way k9ay loop system this is the popular k9ay loop receiving antenna, as described in the september 1997 issue of qst, the k9ay terminated loopa compact, directional receiving antenna, by gary breed, k9ay. I have no room for beverages in fact several honest suppliers like k1fz and n0tt told me dont bother and directed me to this loop, so this was my only choice for a real receiving antenna with some theory behind it. The ayl4 consists of two units, an indoor control box and an outdoor. K9ay zo fest 2009 radio 1 so2r antenna switch rx ant. The main category is k9ay loop antennas that is about k9ay loop antennas. I talked to with several hams about their experiences with the k9ay. The antenna combines magnetic h and electric e field reception in order to create a directive radiation pattern. The antenna combines magnetic h and electric e field reception in order to. Building upon the foundation laid by the ewe, k9ay, and the flag and pennant antennas, the sal featured true time delay.
The k9ay terminated loopa compact, directional receiving antenna wish you had enough room for an effective lowband receiving antenna. This system provides a cardioid directional pattern in four different directions. It will also appeal to practicing engineers working on antenna development. Back at the dayton hamvention in 20, array solutions debuted a new compact receive antenna system called the shared apex loop array, or sal. As for all lowgain antenna, there could be some noise incursion common mode issues. Seems very few people have anything good to say about them. A lot of info can be found on internet, and especially in the must read low band dxing by on4un. Kraus this text is for the course on antennas offered to the seniorgraduate level by most electrical engineering departments. In a relapse of one of my occasional bouts of interest in seeing just what is still being broadcast on various parts of the hf spectrum, i have been exploring just how. This link is listed in our web site directory since thursday feb 25 2010, and till today build a k9ay receive antenna has been followed for a total of 2998 times. Pdf this paper presents a variety of directive, electricallysmall ultrawideband.
K9ay is a loop developed in the early 1990s by american radio amateur gary breed k9ay. Hf switchingmatching antenna six to two switch antenna six to two switch 2 triplexer ver. For example, two k9ay loops will have a far better directive pattern than is possible with two omnidirectional verticals. Since you have chosen a small receiving antenna, it is likely that your transmitting antenna will be nearby. Describe your experience with the k9ay loop antenna kit and tell us why you give it the rating you did required.
Wa1ion version of the k9ay loop by mark connelly, wa1ion the k9ay loop antenna can provide a cardioid heartshaped, singlenull pattern when one end of the antenna is connected to ground through a variable dc resistance. How to build the k9ay loop receiving antenna gary breed, k9ay ay technologies 6677 sunset drive verona, wi 53593 email. The relays are large, 12 vdc units which do not have the best contacts. Reorganized to flow logically from broad physical principles to specific antenna design and construction techniques, the book begins by covering the fundamentals. The k9ay terminated loopa compact, directional receiving antenna. The k9ay antenna as produced by wellbrook communications is a marvelous antenna for medium and long wave dxing. A directional eh antenna for hf thank you to frank sessink pa0fsb for submitting to us his document describing the k9ay loop antenna pdf, which is the antenna that he successfully uses with his rtlsdr for hf reception. View and download the shield schematic and pcb kicadeagle cad files. About build a k9ay receive antenna the resource is currently listed in in 2 categories.
A metal mast can be used, but make it only as long as necessary and insulate it from ground. The k9ay loop is one of the most popular receiving antennas which can fit in a small lot. Obviously to support folding, either the antenna wire has to move along the ends of the arms or i have to detach the antenna wire from the base. Martin francis ndb k9ay mast revised th july, 2004 main dx pages. Thank you to frank sessink pa0fsb for submitting to us his document describing the k9ay loop antenna pdf, which is the antenna that he successfully uses with his rtlsdr for hf reception.
This occurs because of the interaction between electric and magnetic field pickup patterns. The wooden a frame support described in the arrl handbook and antenna book is an excellent choice. For our contest group pa6z we needed some good receiving antennas for the low bands 160m, 80m and 40m. Receiving directivity factor rdf proven measure of receiving antenna performance compares forward gain at the desired azimuth and elevation angle to average gain over the entire hemisphere eznec computes antenna rdf assumes noise is equally distributed over the entire hemisphere an invalid assumption for suburban and especially urban locations. Here we see null k9ay loop with terminated adjusted for elevations of 20 and. Even though i have not used a k9ay antenna cut for shortwave frequencies, my medium wave version is second only to my 500 foot beverage antennas when dxing the tropical bands. Yes, i finally got around to putting up a k9ay loop. K9ay loops wish you had enough room for an effective low. Transmitting antennas, power lines, towers and other nearby large conducting objects can reradiate signals that are coupled to the receiving antenna. As there is much literature on the net about this antenna, i will not publish it here, but just provide some pictures on my construction. The k9ay loop is one of several published designs that use a terminated loop to get a directional pattern in a small space. The beverage antenna handbook download ebook pdf, epub. Martin francis ndb k9ay mast revised th july, 2004 main dx pages modifications.
About the mini k9ay antenna the resource is currently listed in in a single category. About the minik9ay antenna the resource is currently listed in in a single category. K9ay 80160 meter switchable loop antenna system after operating a couple 160 meter contests last winter, i realized i needed to do something to improve my receiving performance. Wish you had enough room for an effective lowband receiving antenna. In a relapse of one of my occasional bouts of interest in seeing just what is still being broadcast on various parts of the hf spectrum, i have been exploring just how useful a small terminated loop, like the k9ay can be. The k9ay terminated loop a compact, directional receiving. Practical antenna handbook pdf download free ebooks. Model ayl4 4way k9ay loop system this is the popular k9ay receiving loop, as described in the september 1997 issue of qst, the k9ay terminated loopa compact, directional receiving antenna. The text explains both the basic theory of antennas and its application to practical designs. Easy to build low band receiving antennas for small and. My current k9ay is an amalgamation of parts removed from various equipment. This link is listed in our web site directory since saturday dec 14 20, and till today the minik9ay antenna has been followed for a total of 671 times.
Mediumsized low band rx antenna solutions gary breed, k9ay expanded version of a presentation at the w9dxcc convention september 15, 2007, elk grove village, il with the low bands benefitting from the current sunspot minimum, receive antennas are important for dxers, contesters and other active amateur radio operators. Lowband operators are always looking for ways to improve their hearing. Describe your experience with the asayl4 the true k9ay dx antenna with optional wiremast kit and tell us why you give it the rating you did required. Click here to download the ayl4 controller manual click here to download faqs on the k9ay antenna. Fasten the antenna wires effectively the top guys first, and let the nylon ropes dangle better still, tape them to the sides of the mast temporarily before you start, so the wind doesnt make the whole thing into a maypole. The k9ay loop is ideal for larger arrays, since it has already has a directive pattern. I did modify my proii so the receive antenna is disconnected during transmit and the problem went away. The optimized terminating resistor was 486 ohms for best fb, average soil.
I took this in stages by playing with the pennant loop with vactrol circuit first. To avoid this problem, locate the k9ay loop as far from the transmitting. While outwardly appearing different, the ewe operating mechanism is no different than a flag, pennant, or k9ay. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. K9ay receiving antenna mast and wire kit array solutions.
It is a relatively small receiving loop that works well from 10 mhz and down. Gary breed, k9ay, developed a receive loop system that takes up very little space. Comments the switchable receive antenna is a nice addition. Tv downloads your source for practical technology, hacks, and mods.
The k9ay loop is meticulously built, and works very well. This antenna system is the only broadband phased k9ay to offer a unidirectional pattern similar to the beverage, over 360 degrees with electronic null optimisation. It was apparent that many stations were copying me much better than i could hear them, so something needed to be done. By gary breed, k9ay the 1 directional receiving antenna owband operators are always looking for ways to improve their hearing. Here are all the details you need to build the k9ay loop antenna system.
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