This monograph provides a couple of suggestions that may improve the. This link is listed in our web site directory since sunday mar 25 2007, and till today how to build the k9ay loop has been followed for a total of 8006 times. In that case you might be better off with something like a k9ay array. Homebrew rf circuit design ideas there is no such thing as a new idea. The gold standard for 160m receive antennas is of course the beverage antenna. Swb publish information of interest to the experienced dxer. We simply take a lot of old ideas and put them into a sort of mental kaleidoscope.
The k9ay terminated loopa compact, directional receiving. 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. Single wire beverage a very simple and inexpensive antenna 250 400 feet long 4 6 db rdf 100 degree beamwidth 500 600 feet long 10 db rdf 70 degree beamwidth single wire beverage the simplest and most reliable high performance receiving antenna. Qs1010preedy01 for a k9ay loop at 450 elevation with a termination of 470 q. This occurs because of the interaction between electric and magnetic field pickup patterns. This system provides a cardioid directional pattern in. The solution gary breed, k9ay, described a termi nated triangular wire loop antenna in 1999 that offered to improve reception on the lower iif bands by virtue of its directiv ity.
K9ay is a loop developed in the early 1990s by american radio amateur gary breed k9ay. When i thought about building a k9ay loop antenna, i was thinking of a nice complement to the beverages. K9ay loop faqs rf feedback and rx front ends my radio is an ic756proii, driving an alpha 76a amplifier 1500 watts out and i did have feedback from the loop that distorted my transmit signal. 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. Receiving antenna s for pa6z made by pa9m a receiving antenna for the low bands.
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. By ronald lumachi, wb2cqm just as quickly as cable tv companies wire up neighborhoods for catv service, home owners remove tv antennas, masts. Hf switchingmatching antenna six to two switch antenna six to two switch 2 triplexer ver. 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.
This amplifier is also available for home construction of the k9ay antenna and. To avoid this problem, locate the k9ay loop as far from the transmitting. 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. As supplied, the vertical antenna is designed to operate on 60 meters. Loop the loop john wilson ventures into the great outdoors, well a field of sheep, to bring us the amazing steerable low frequency wire loop antenna from wellbrook communications.
Antenna house pdfxml conversion library convert pdf to xml. By gary breed, k9ay lowband operators are always looking for ways to improve their hearing. Since you have chosen a small receiving antenna, it is likely that your transmitting antenna will be nearby. The wellbrook k9ay has been widely acclaimed by many dxers, and several articles have been written about it, among others by guy atkins and john bryant. 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. With this setup i have the option of choosing the best.
During this test im switching between east and west, so. Jul 7, 2018 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. The antenna combines magnetic h and electric e field reception in order to create a directive radiation pattern. K9ay loop antenna asaly4 trouble shooting guide 1 disconnect at least one end of each loop from the relay box to measure the relay action without the loop shorting it out. About how to build the k9ay loop the resource is currently listed in in 2 categories. 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. Rx antena 4way rx antenna switch k9ay loops k9ay loop feeder with bpfs and preamp rx antena beverages and wire antennas acessories. The next step up, multiple element versions of these can make a huge increase in sn. Use nec to model antenna and predict inductance required to resonate the the antenna or.
Another fb test on 80m with improved k9ay receiving antenna now the loop has abt 25m and its 8m tall. This antenna is easy to set up, it has a small footprint 10x10 m and it provides four directions for receiving. Installation instructions ayl4 4way k9ay loop system. Latin america probably doesnt need listening antenna. Include schematics and info on a building the control box, preamplifier and lowpass filter hf receiving loop antenna hf receiving loop antenna, an easytomake receiving loop antenna for hf. Shortwave bulletin is produced in sweden basically in swedish, but contributions are normally presented in original language, so you will find all scandinavian languages as well as english in this bulletin. Improving performance of arrays of k9ay loops richard c. It was apparent that many stations were copying me much better than i could hear them, so something needed to be done. Receiving antenna for low bands k9ay loop antenna installed at pa6z contest group. A better solution would be to use the classic opamp transimpedance amplifier topology to convert current to voltage, but this would require a fully differential opamp, and the noise performance is unlikely to be as good as a simple diffpair.
The main category is k9ay loop antennas that is about k9ay loop antennas. Modular antenna switch antenna six to one switch antenna six to one switch kit antenna one to. Once i was able to get initial low band antennas on my half acre house lot see my page on a folded counterpoise for 160m, i turned my attention to improving my receive capabilities. I was also hoping that i could use it for phasing purpose against my wire antennas and that it could be a nice performer for latin america notably.
Impressions and a field test k9ay loop antenna by bjarne mjelde c bjarne mjelde, 2000, 2001 the k9ay loop is with little doubt the hottest dx gadget among serious dxers today. Small and simple antennas with almost the same performance include the ewe, k9ay, flag, delta, pennant, and diamond. The k9ay directional terminated loop antenna is a totally new receiving antenna system designed to improved long and medium wave reception author. If you want to reuse content from old pdfs, you no longer need to retype or go through the trouble of reconstructing your documents content from the pdf. Fortify your existing antenna or build your own with highquality brackets, clamps, tubing and supports from dx engineering. Shop here for antennas, antenna systems, and antenna components from the best. Thus meeting the demanding requirements for the mw, topband and lw dxer. The ayl4 consists of two units, an indoor control box and an outdoor. The k9ay antenna is a popular, compact receive directional antenna commonly used on the 80 and 160 meter amateur bands to improve the signaltonoise ratio 1.
The following items about the k9ay loop will be discussed in this article. Manufactured with 6063 corrosionresistant aluminum tubing and stainless steel hardware, this antenna is very durable and. Comments the switchable receive antenna is a nice addition. Serious 160 m ops have a listening antenna focused on europe.
Use vector analyzer to measure feedpoint z of an existing antenna thats too short, export data to simsmith and predict inductance coil winding formulas in arrl handbook are very accurate. Easy to build low band receiving antennas for small and. By gary breed, k9ay the 1 directional receiving antenna owband operators are always looking for ways to improve their hearing. This system provides a cardioid directional pattern in four different directions.
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 k9ay directional terminated loop antenna is a totally. Because of factors related to my lot and house, an 80foot spacing is used between loops in the nesw direction, and 57. The k9ay terminated loopa compact, directional receiving antenna wish you had enough room for an effective lowband receiving antenna. This is a receiving antennas for the low bands 160m, 80m and 40m. These antennas are physically small in terms of wavelength and composed of phased verticals or a terminated loop. Recycling tv antennas for 2meter use green that aluminum into something useful right in your own backyard. Transmitting antennas, power lines, towers and other nearby large conducting objects can reradiate signals that are coupled to the receiving antenna. Dx engineering, cushcraft, hygain, hustler, comtek systems, diamond antenna, and more. The previous portion of this story describes my attempt at building a homebrew k9ay system around a conventional gary breed configuration with the exception that my transformer was built to a design allegedly superior to the original. I did modify my proii so the receive antenna is disconnected during transmit and the problem went away. Devote at least a year to test antenna before giving up on an antenna. The k9ay proves to exceed both expectations and specification. As a lowband fan, i was impressed with the ewe antenna developed by floyd koontz, wa2wvl.
A popular low noise receiving antenna used by low band operators is the ewe, flag and k9ay antennas. 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. Terminated inverted u low noise antenna page 2 qrz forums. Basic k9ay loop 85 triangular loop 25 high, 30 wide resistive termination directional antenna easily switched in 2 directions 4 directions with an orthogonal pair of loops 9. 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. Some people have assembled this antenna, but have had difficulty in achieving an acceptable fronttoback ratio. 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.
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