K9ay Antenna

After having enough info, we decided to build the so called K9AY loop. I first heard about it when it was introduced as an extension to the KiwiSDR. The K9AY is terminated loop. Here is a snapshot taken out of my antenna tower. The winter time is closer and closer and it is time to start working on Low-Band RX antennas. I require a somewhat large reactance on the element to help load it on 160M, (40&80M) are working somewhat satisfactory now. Shop here for antennas, antenna systems, and antenna components from the best: DX Engineering, Cushcraft, Hy-Gain, Hustler, COMTEK SYSTEMS, Diamond Antenna, and more!. Other sites that you should visit include Mark Connelly WA1ION , Tom W8JI , Flag and Pennant Antenna Compendium , Hard Core DX , and Wellbrook products to mention but a few. A tall tower is a great target for lightning, so every tower system needs a protective ground. The K9AY loop antenna relay-box it seems to work there is a strong directional effect. It works well enough, but I'd love to get one of these units into the control box at the base of the antenna. The HF2V will radiate noise into the K9AY loop and distort the patterns UNLESS you arrange a way to completely detune the antenna during receive. MicroKeyer MKII / WinTest logging software/16 Networked PCs. Like K9AY, this antenna is less sensitive to common mode current problems than an usual flag or pennant antenna. Receiving VQ9LA very well few evenings in a row. , Wessex House, Drake Avenue, Staines (Nr Heathrow), Middlesex, TW18 2AP, Tel: +44 (0)1932 567 333. There are also some discussion groups that can help. This is especially true for Beverage, Random wire (Longwire), K9AY, Flag, Pennant, Ewe, and Folded dipole antennas which tend to have much higher impedances. K9AY is a loop developed in the early 1990's by American radio amateur Gary Breed (K9AY). 4 Square Verticals was especially susceptive on QRN. The AYL-4 K9AY Loop System requires approximately 15 feet in four directions from the center of the antenna, plus additional distance depending on the guying method. com, then please Contact Us. --- Dedicated to low-band receiving antenna design using arrays of K9AY loops ---Details of the original triangular terminated loop design by Gary Breed (K9AY) can be found through the following links: Original K9AY Loop Design [1] Original QST Article [2] In my location with poor ground conditions, the K9AY loop seems to offer the best. Also, why every house should have an emergency way of listening to the outside world. Notebook showing Small Magnetic Loop antenna results by cutting and testing method. Improving Performance of Arrays of K9AY Loops Richard C. However, if you live in a high man-made noise area, it could really help. There are various designs available on the internet. This four-direction system fits in a 30-foot circle! By Gary Breed, K9AY Low-band operators are always looking for ways to improve their hearing. Splitter is controlled by +12V. As a HAM who has passion for homebrew, you need everything in stock concerning antenna tools and steenless steel equipement. Location, Location, Location. Jaeger, K4IQJ “Multi-Element End-fire Arrays of K9AY Loops,” expanded version of 2011 Dayton presentation, May 15, 2011, available from the author. The Diamondback Antenna The best transmitting antenna for DX contesting. January 2015, I use an homebrew special K9AY 2 * 43m loops antenna with a 16dB dual-fet push-pull preamplifier. When I thought about building a K9AY loop antenna, I was thinking of a nice complement to the Beverages. The Loop has Steel Welded Wire Mesh Fencing laying under it as the Ground {Reflector} Radials. For our contest group PA6Z we needed some good receiving antennas for the low bands (160m, 80m and 40m). To truly test how wonderful a k9ay loop antenna is, bearing in mind the sparse and intermittent nature of 160m signals, you might like to experiment with nulling out local plasmas with it, but this gets a bit "old" after a while. You can either have one radio for each antenna, or use an antenna switch. You can direct null of pattern to local source of noise. K9AY terminated loops for 75m It is very compact, low noise and directive with an impressive 20 to 25 dB front to back. I guess they may use 4 antennas, but two of them would have to be rotated 90 deg. antenna worked great as a transmit antenna, but we really had trouble hearing. The relays are large, 12 VDC units which do not have the best contacts. A site dedicated for the AM Radio Amateur and vintage radio. Home of the AM Press/Exchange, The AM Forum (the largest BBS of it's kind),and The AM Classifieds, Photos, Audio, and technical information. It would seem that the Flex 6000 preamplifier capabilities would mean I don't need the standard out board receive pre-amp. Note: The top of this page has links to various receiving antennas such as Beverage, "magnetic" loop, and vertical low-noise DX receiving antennas. The main category is K9AY loop Antennas that is about K9AY loop Antennas. To my fellow low bands operators who have found the K3KY Flags and Pennants page useful, my heartfelt thanks. >I just bought a few vactrol's from B G Micro for use in my K9AY antenna in place of the fixed termination >resistors. Wellbrook Communications are the only UK company that supplies a complete range of Long wave loops, Medium wave (AM) loops and Shortwave (HF) receiving loop antennas for radio amateurs and listener hobbyists. K9AY Custom 3X2 matrix switching for Beverage antennas. 160M signals are really weak here from Europe and the K9AY AYL-4 makes the difference - many times - between making the QSO and not. So now, I think that we have the answer to the inital question: Is my K9AY working as expected - YES ! What is the benefit of such a receiving antenna: for my personnal case on 80m, an average 5 to 6dB if the station is in good part of the half-circle. It has reduced sensitivity on 15M and up, due to the antenna design AND the buffer, AND the QS1R. Although almost any wire size will do, #14 copper is probably the best for a. You can take advantage of this for 2 independant RX on band(s). GPC Desktop. Even with R=560 Ohm (=value for 80m) , the F/B is still 25 dB or so (according to what I hear and see on my S-meter). 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. The gold standard for 160M receive antennas is of course the Beverage antenna. Antenna Alternatives -- unidirectional. K9AY antenna control board completed. Foreground, the K9AY array. To avoid this problem, locate the K9AY Loop as far from the transmitting antenna as possible. Another advance has been to combine sig-. Phased Array Medium Waves Ham Radio Antenna Warren Buffett Hams Circuits Radios Ants Wi Fi. K9AY (4 direction Low Bands Receiving Antenna) Receiving antenna AS-AYL-4 for Low Bands 80m and 160m. K9AY Receiving Antenna Mast and Wire Kit. The owner must be present before any testing is allowed. ( Drawing of my K9AY variation. The brochure had pictures of diamond-shaped terminated loops, individual small loops, and loop arrays that looked like a number of Flag antennas strung end-to-end where each rectangular "loop cell" fed the next loop. --- Dedicated to low-band receiving antenna design using arrays of K9AY loops ---Details of the original triangular terminated loop design by Gary Breed (K9AY) can be found through the following links: Original K9AY Loop Design [1] Original QST Article [2] In my location with poor ground conditions, the K9AY loop seems to offer the best. 73, Gary K9AY k9ay at k9ay dot com _____ Hi everybody, I would like to try K9AY antenna for this CQWW mainly for 160 but after the contest I hope it to be usefull for 160 and 80. l'2 Koontz shows us how to build a compact, directional antenna—a design that quickly. At the shack end, a control box is fed with band-decode information from the Ameritron RCS-12c - and automatically selects the antenna based on the rig's current band selection. Each loop is constructed as an endless wire loop that is routed through a group of ferrite. The NCC-2 is primarily designed for 500 kHz to 15 MHz use, although the useful operating range extends from below 300 kHz to 30 MHz. Small receiving arrays such as the phased dipoles of K6STI and the EWE and loop-style K9AY and Flag antennas that act as a pair of short ver - ticals were a step forward. This season there have been made some modifications to the pole. January 2015, I use an homebrew special K9AY 2 * 43m loops antenna with a 16dB dual-fet push-pull preamplifier. The K9AY Loop Antenna: A Directional E-H 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 RTL-SDR for HF reception. The first problem to solve was location. The latter are only single turn loops, which are terminated with a resistor, and the enclosed area of the loops is much larger. By the rigorous definition, the inverted-vee is merely a variation on the dipoletheme. '91 OST BY GARY BREED K9AY Features: SINGLE-SIGNAL receiver, VFO tuning, AGC for listening comfort, 5 Watts output, Semi-QSK TR switching and CW sidetone. Loading Unsubscribe from Jan Šustr? Cancel Unsubscribe. With the AYL-M kit, 21 feet in each of the four directions is required. Murphy was so kind to pay me a visit and he wrote something about his own activities during the CQWWCW contest, edition 2005. The Caribbean Contesting Consortium sta-tion PJ2T on Curacao has notched another DX Multi-Multi win, their third overall, and their fifth consecutive win in either the Multi-. 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 RTL-SDR for HF reception. Special K9AY antennas: Each K9AY Head Unit has a low noise 20dB gain, high IOP2/3 close phase matched amplifier. K9AY insulators and remote box. The K9AY loop antenna for 160 and 80m bands. Radio Antenna Preamplifier Kit. This looks like a difficult work in a height of about 8 m. 前に実験し良い結果でなかったK9AYを再度チャレンジしてみました。今日は製作、設置だけでした。1278KHz RKB放送(北九州)を受信約10dbを測定。. The main category is K9AY loop Antennas that is about K9AY loop Antennas. To all others who contributed to the development of this antenna family, my thanks also. 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. However, if you live in a high man-made noise area, it could really help. Although almost any wire size will do, #14 copper is probably the best for a. , Wessex House, Drake Avenue, Staines (Nr Heathrow), Middlesex, TW18 2AP, Tel: +44 (0)1932 567 333. four different directions. An Unusual Loop Antenna. The AYL-4 K9AY Loop System requires approximately 18 feet in four directions from the center of the antenna, plus additional distance depending on the guying method. For example, using a rely to short the Butternut to ground (above the matching coil) might do it. Author: Don Daso, K4ZA. Combine that with 7. This waterfall shows the frequency range from about 8 - 30 kHz captured pre dawn on 10/02/11 using the #1 setup described below. Some times the K9AY was better and some times RBOG was better in the directions it was pointed. This is the home page for the Aruba QTH of P49Y and P40L. are well thought out. But for receive, the antenna favors strong local and mid-range stations. Gary Breed, K9AY, developed a receive loop system that takes up very little space. Low-band operators are always looking for ways to improve their hearing. In conjunction with this trip we organize a fundraiser for Doctors Without Borders in Somalia. Best to have 2 antennas to compare signals! Devote at least a year to test antenna before giving up on an antenna. '91 OST BY GARY BREED K9AY Features: SINGLE-SIGNAL receiver, VFO tuning, AGC for listening comfort, 5 Watts output, Semi-QSK IR switching and CW sidetone. K9AY insulators and remote box. Looking at some older posts, it appears that the way to use them is with a 1k pot connected to >the 12v supply. The BT-75 Beverage transformer is your first step in building a wire Beverage antenna that really pulls weak DX signals out of the noise. Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. This system provides a cardioid directional pattern in four different directions. Loading Unsubscribe from Jan Šustr? Cancel Unsubscribe. Notebook showing Small Magnetic Loop antenna results by cutting and testing method. It works well enough, but I'd love to get one of these units into the control box at the base of the antenna. So now, I think that we have the answer to the inital question: Is my K9AY working as expected - YES ! What is the benefit of such a receiving antenna: for my personnal case on 80m, an average 5 to 6dB if the station is in good part of the half-circle. This antenna is easy to set up, it has a small footprint (10x10 m) and it provides four directions for receiving. It works well enough, but I'd love to get one of these units into the control box at the base of the antenna. Second receive antenna I am considering is a K9AY loop receive four-way array, like the Array Solutions offering. power/SWR meter, dummy load, voltmeter, antenna analyzer, and a speaker that the current owner can use to test purchases before leaving the hamfest. Dave Gahimer (K9ZCE): Building a magnetic loop antenna & broadband amplifier for your SDR Then there is the possibility of SDR chip damage from your 1. K9AY++ RX antenna system with BPFs, Preamp, Controller and much more The K9AY is terminated loop. If you're an expert on K9AY loops, please weigh-in. First K9AY for medium wave Al Merriman, K4GLU, was the first to use this antenna for serious medium-wave DXing. • This should become a popular antenna. The box on the right is an RTR1A transmit and receive relay switch between TX and RX. This box may have layout problems. Producer of the K9AY low frequency receiving antenna system. Array Solutions products online from ML&S Martin Lynch & Sons. Since you have chosen a small receiving antenna, it is likely that your transmitting antenna will be nearby. 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. The original article by Gary Breed on which this antenna was based used a very clever idea for relay switching via a control voltage up the antenna cable - a positive DC for the first relay, a negative one for the second, and AC for both at once. 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 RTL-SDR for HF reception. I took this in stages by playing with the Pennant loop with Vactrol circuit first. 5, MAY 2014 2767 A Coupled Resonator Decoupling Network for Two-Element Compact Antenna Arrays. The use of the high gain amplifier together will a low capacitance antenna matching transformer provides very high antenna/feeder isolation, this ensures that any. The K9AY Loop Antenna: A Directional E-H 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 RTL-SDR for HF reception. Low Band DX Antennas –Receive Only (RX) •On 160, your biggest issue will be hearing DX stations •I experimented with •Coaxial Loops •Single wire loops •Flags (EWE, K9AY and Pennant) •Phased verticals •And then I found the best –a modified K6SE Flag •By accident –I had my antenna switch to the wrong antenna and found that my DX. BOGs and BOG Arrays 6 to 8 dB RDF 60º to 90º Beamwidth. small diameter loop (“magnetic” loop) fixed unidirectional loop (flag, pennant, ewe, K9AY) mechanically rotatable unidirectional loop (rotatable flag) electrically steerable compact array of loops (K9AY, Shared Apex Loop Array) Beverages. Wolf RF Systems The K9AY Receiving Loop James Wolf, KR9U 2415 Union Chapel Rd Fort Wayne, IN 46845 [email protected] 4 Square Verticals was especially susceptive on QRN. RDF or Relative Directivity Factor seems to have been popularized by W8JI where the Gain in the forward direction is divided by the gain in all other directions. Download the original paper (pdf document) from K9AY here. 14 and replaces speculation with observations and conclusions). 1d – 02/2007. antennas on the low bands. The secondary is the main loop, and is the actual antenna. The owner must be present before any testing is allowed. Jeff VE1ZAC, April 28,210. The author, a professional technical writer and training developer, has written adult vocational training materials for the petroleum refining, chemical, and aviation industries; and various technical articles for amateur radio. A temporary setup for testing purposes only. While doing EZ-NEC design for a two-element array over vertical monopoles, I decided to substitute a small, vertically-polarized loop element in place of the. Antenna Towers for Radio Amateurs will guide you through the installation process in its entirety, from selecting a tower, digging the base, pouring concrete, and installing the tower, antenna and accessories. This system provides a cardioid directional pattern in four different directions. 73, Gary K9AY k9ay at k9ay dot com _____ Hi everybody, I would like to try K9AY antenna for this CQWW mainly for 160 but after the contest I hope it to be usefull for 160 and 80. Back at the Dayton Hamvention in 2013, Array Solutions debuted a new compact receive antenna system called the Shared Apex Loop array, or SAL. RX antennas at IV3PRK: the K9AY Loop Useless in my noisy environment By Pierluigi "Luis" Mansutti IV3PRK The K9AY Loop is one of the most popular receiving antennas which can fit in a small lot, and I built it in the summer 2006, exactly as designed by Gary Breed and sold by "AY Technologies" as the AYL-4 model. We made some KITs of Bi-Directional beverage and K9AY loops RX antennas which we use at OL7M. K9AY 160M / 80M Receiving Loop Antenna System. However, if you live in a high man-made noise area, it could really help. a crossed pair can provide a multi-directional array. Your radio's antenna connector typically has a 50 ohm impedance, however the impedance of your antenna can be significantly different. ACARTS will not be held responsible if damage occurs and will not mediate any seller/buyer dispute based on test results. The antenna is an aperiodic inverted U which is operated against ground. The Beverage antenna—another vertically-polarized receiving antenna—has also been used in broadside arrays to provide similar performance where space for such devices is available. A site dedicated for the AM Radio Amateur and vintage radio. Some people have assembled this antenna, but have had difficulty in achieving an acceptable. An additional run of CAT5 cable takes care of relay switching, vactrol and pre-amp supply volts. This is especially true for Beverage, Random wire (Longwire), K9AY, Flag, Pennant, Ewe, and Folded dipole antennas which tend to have much higher impedances. Improving Performance of Arrays of K9AY Loops Richard C. I am doing some design with vertical antennas for the low bands 40/80/160M. Multi-Element End-fire Arrays of K9AY Loops + Report. K9AYは、開発者である米国のハムのコールサインがアンテナの名称になった受信用のループ アンテナです。 オリジナル(QST誌に掲載)は、図 1 のように直交した逆三角形(逆ダイヤモンド型)のループ2面. Antenna Designs, Reviews, and Tutorials Long ago, Shortwave America promised an article on antennas. A tall tower is a great target for lightning, so every tower system needs a protective ground. 5 30 @ 18° EWE, Flag, Pen't 7. There have been many installations of the 4SQ K9AY for 80m used in SP since early spring 2005. The antenna switch will be the receive antenna switches from HiZ and the pre-amp for 160m and 80m are from KD9SV. Steve, Glad to hear the K9AY is working so well. I built the classic K9AY crossed loops at 90 degrees for four-direction switching. Crete is extremely mountainous so the properties here even in small villages aren't big enough for beverages antennas. Corbett II. com More information Find this Pin and more on Ham radio & Electronics by Earl E. Location, Location, Location. I will try to explain in few words how the small magnetic loop antenna works. There are antennas that have superior performance like Beverages (needs more room), some are a little easier to build, like the EWE (covers only one or two directions) and some may also cover a wider range of frequencies, like phased verticals (complicated and/or expensive). 5-metre PVC-coated steel wire elements, and an internal power inserter which powers the external unit via the coaxial cable. To all others who contributed to the development of this antenna family, my thanks also. A recent conversation with N1LN caused me to dig out the schematic for my slightly customized K9AY, built back in pre-blog 2006. You don't have. --- Dedicated to low-band receiving antenna design using arrays of K9AY loops ---Details of the original triangular terminated loop design by Gary Breed (K9AY) can be found through the following links: Original K9AY Loop Design [1] Original QST Article [2] In my location with poor ground conditions, the K9AY loop seems to offer the best. RDF or Relative Directivity Factor seems to have been popularized by W8JI where the Gain in the forward direction is divided by the gain in all other directions. VLF Reception at W1VD Burlington CT. We were still concerned that 160 and 80m would be a bust if we didn't do something. Enter the MS-S7-Web Remote Antenna Switch. My area was one of those--the K9AY never worked very well for me. Review of K9AY antenna by Bjarne Mjelde. The K9AY loop antenna for 160 and 80m bands. com: 160m OK0EV beacon Jan Šustr. The Waller Flag has the pattern of a one-wavelength-long Beverage and can be even mounted on a tower and rotated. This antenna is directional. Next is the 8 element Hi-Z receive antenna (hardly visible). power/SWR meter, dummy load, voltmeter, antenna analyzer, and a speaker that the current owner can use to test purchases before leaving the hamfest. Corbett II. I don't have access to the September 97 QST article on making the K9AY Loop antenna, but would really like to try one. Construction of K9AY antenna: The antenna is designed as a portable antenna, for setup during winter months. The part that I question is that the configuration supposedly produces a loop with only one lobe, rather than the figure-eight pattern of virtually every other multi-turn loop that I've ever encountered. Enter the MS-S7-Web Remote Antenna Switch. How to Build the K9AY Loop Receiving Antenna. 5mtr (25ft), it will fit about anywhere. We now use an inverted L antenna for 160m and 80m 2x 20m dipole. Antenna Alternatives -- unidirectional. There are also some discussion groups that can help. Some work better than others, depending. Antennae for the Low Bands. FULL 100% KIT including a custom pre-painted, punched and lettered metal enclosure. antennas on the low bands. It belongs to the family of the small loops, like Flags and Pennants, but it needs a ground connection. The K9AY gain was typically 10dB higher on LW and 15dB higher on MW. A decent lowband receiving antenna (like multi phase staggered beverages) requires real estate and/or extensive hardware and trimming (6-9 Circle). articolo per costruire una antenna di ricezione di dimensioni molto ridotte !! OTTIMA RELAZIONE SULLE LINEE BIFILARI "SCALETTE". Both a re 200 feet long. Working Subscribe Subscribed Unsubscribe 19. The K9AY has clearly proved to be an ideal backyard lowband receive antenna. I built the classic K9AY crossed loops at 90 degrees for four-direction switching. Where I am located, I would have to mail order the torroid, which will add a couple of weeks to the project. The K9AY switchbox allows any beverage to be connected to either radio. • The SAL-30 is a terrific RX antenna • Excellent solution for limited real estate or for staying out of the woods with a Beverage • Directionality really helps on RX • I may try to combine w/low dipole for omni RX • Great support by the inventor and Array Soln. It belongs to the family of the small loops, like Flags and Pennants, but it needs a ground connection. This is the popular K9AY Loop receiving antenna, as described in the September 1997 issue of QST, “The K9AY Terminated Loop-A Compact, Directional Receiving Antenna,” by Gary Breed, K9AY. The reflector panel is made of aluminum with high precision. I am planning a K9AY delta loop receive antenna for 160M. The K9AY Array by Gary Breed is a great low band receive antenna for hams with limited space. 6 - 8 dB: Array of small loops (flag, pennant, K9AY) 8 - 10 dB: 500 - 600 foot Beverage. This is another variant of the EWE, where the bottom wire of the loop is grounded in the center. ) to 50 Ohms across the broadcast band. K9AY Loop at VE1ZAC, Finally. To switch the antenna the operator likes to use we have purchased a 2x8 switch from K9AY. Full-size K9AY is a low-gain antenna : -23dBi of gain on 160m, -13dBi on 80m; And its performances are ground dependant. Like K9AY, this antenna is less sensitive to common mode current problems than an usual flag or pennant antenna. It requires cascaded, antenna-mounted preamps and careful attention to minimizing unwanted common mode signals. It always outperforms the transmitting antennas, in terms of Signal-to-Noise, when I am working DX (Location MO). But for receive, the antenna favors strong local and mid-range stations. If I had to pick one receive array of my three current ones… hmmm, it would really be a tough call. Some folks have good results with the K9AY type antenna--Doug in TX has good results using that antenna. Gary Breed, K9AY, described this loop very well in his Sep 1997 QST article (Ref 1265). Your radio's antenna connector typically has a 50 ohm impedance, however the impedance of your antenna can be significantly different. Jeff VE1ZAC, April 28,210. I'm considering adding a K9AY antenna for 160m and 80m. * RX antennas: 200m beverages to NA, EU, VK, Asia and SA. The use of the high gain amplifier together will a low capacitance antenna matching transformer provides very high antenna/feeder isolation, this ensures that any. To truly test how wonderful a k9ay loop antenna is, bearing in mind the sparse and intermittent nature of 160m signals, you might like to experiment with nulling out local plasmas with it, but this gets a bit “old” after a while. Bow-Tie RX Antenna Rudy Severns N6LF A typical terminated loop receiving antenna is shown in figure 1. Ty však vyžadují poměrně značný prostor, který je ne vždy běžnému radioamatérovi k. Loading Unsubscribe from Jan Šustr? Cancel Unsubscribe. The Beverage antenna—another vertically-polarized receiving antenna—has also been used in broadside arrays to provide similar performance where space for such devices is available. Back at the Dayton Hamvention in 2013, Array Solutions debuted a new compact receive antenna system called the Shared Apex Loop array, or SAL. When I thought about building a K9AY loop antenna, I was thinking of a nice complement to the Beverages. com Phased Array Medium Waves Ham Radio Antenna Warren Buffett Hams Circuits Radios Ants Wi Fi More information. The third box on top of the Stackmatch controls was used as the original K9AY controller. A K9AY Array Switching and Transformer Circuit. a crossed pair can provide a multi-directional array. articolo per costruire una antenna di ricezione di dimensioni molto ridotte !! OTTIMA RELAZIONE SULLE LINEE BIFILARI "SCALETTE". So now, I think that we have the answer to the inital question: Is my K9AY working as expected - YES ! What is the benefit of such a receiving antenna: for my personnal case on 80m, an average 5 to 6dB if the station is in good part of the half-circle. 160M signals are really weak here from Europe and the K9AY AYL-4 makes the difference - many times - between making the QSO and not. K9AY Receiving Antenna Mast and Wire Kit. Build a K9AY Receive Antenna (Mains Powered) This article is how a K9AY switch-able receive antenna was built by Darren Hatcher, G0WCW. It was designed with 4nec2 NEC based antenna modeler and optimizer for 145/220/440MHz bands. It resembles a Delta Loop, but is a very good directional receiving antenna. It is located about 75 feet from the base of the transmit antennas. Put together a quick shortwave antenna using just a few pieces of electrical fencing supplies. [K3] K3 preamp sufficient for K9AY?. I am doing some design with vertical antennas for the low bands 40/80/160M. THE DEFINITIVE ANTENNA REFERENCE--FULLY REVISED AND EXPANDED! Design and build your own antennas with the help of this unique guide. Loop Antenna, Magnetic, Portable-- From G4FON; Love My Loop! by W4KSY; Stunning Loop by K9AY; Compact Loop for lower bands by K9AY; Antenna for serious MW DX-ing by K9AY; Wellbrook's commercial K9AY system; Works great on Medium wave by K9AY; Connelly Loop version by K9AY; Two K9AY loop system is super; Two Loops working as four by SM6LKM. Wish you had enough room for an effective low-band receiving antenna? You do! This four-direction system fits in a 30-foot circle! By Gary Breed, K9AY. small footprint. Those with limited space, or antenna restrictions, might find a small 1 meter loop antenna a solution. 160M signals are really weak here from Europe and the K9AY AYL-4 makes the difference - many times - between making the QSO and not. , Wessex House, Drake Avenue, Staines (Nr Heathrow), Middlesex, TW18 2AP, Tel: +44 (0)1932 567 333. At the shack end, a control box is fed with band-decode information from the Ameritron RCS-12c - and automatically selects the antenna based on the rig's current band selection. Like K9AY, this antenna is less sensitive to common mode current problems than an usual flag or pennant antenna. My area was one of those--the K9AY never worked very well for me. How to Build the K9AY Loop Receiving Antenna. Upgraded version from smctl v1 to 10 keys that can be used for antenna switch up to 1x10 (1x4, 1x6, and other), and a dedicated program for the K9AY loop with preamp control. The K9AY Loop Antenna: A Directional E-H Antenna for HF - rtl-sdr. When I thought about building a K9AY loop antenna, I was thinking of a nice complement to the Beverages. As a low-band fan, I was impressed with the EWE antenna developed by Floyd Koontz, WA2WVL. But it's a ground-dependent antenna and many areas don't have ground characteristics that support such antennas. 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. ==> As for all low-gain antenna, there could be some noise incursion (common mode issues). Add a battery, key and antenna and you're on the air. Murphy was so kind to pay me a visit and he wrote something about his own activities during the CQWWCW contest, edition 2005. I have again put my K9AY antenna , 1st test was to hear RADIO CAROLINE on 1368 kHz this week end 30 oct -1nov special event. About Build a K9AY Receive Antenna The resource is currently listed in dxzone. 73 Dennis W0JX. All terminated loop antennas are inefficient, which means that signal levels are low. [1, 2] Koontz shows us how to build a compact, directional antenna—a design that quickly became very popular. I also enjoy chasing DX on 30 meters. >I just bought a few vactrol's from B G Micro for use in my K9AY antenna in place of the fixed termination >resistors. Producer of the K9AY low frequency receiving antenna system. As it came out later, the 80m antenna works also surprisingly well on 40m. The Diamondback Antenna The best transmitting antenna for DX contesting. Antennae for the Low Bands. Active receive antennas will be with me for the rest of my radio days, even if I have large amounts of space for antennas in the future. com: 160m OK0EV beacon Jan Šustr. Be sure to get one that can stand up to strong signals from your nearby transmitting antennas. Using the scaling rule from the antenna theory, many people were asking about the installation for 160m, expecting that it would also work on 80m. Anyone interested in the results can request it from me at It is a 200 Kb file which includes a picture. PC Desktop. My current K9AY is an amalgamation of parts removed from various equipment. The K9AY kit was from Far Circuits and consists of a pair of loop antennas with a relay box (see photo to left) and a remote switching device in the shack (photo below). 95 from Ham Radio. 5m high and a 10m free-circle around the antenna still too big for your city lot ? No problem, just shrink all dimensions proportionnally and that's almost it !. The antenna was first described by Gary Breed, K9AY, in QST magazine-. A site dedicated for the AM Radio Amateur and vintage radio. High quality 5 m high HF antenna for professional use; Designed for GMDSS installations. The Solution Gary Breed, K9AY, described a termi- nated triangular wire loop antenna in 1999 that offered to improve reception on the lower I-IF bands by virtue of its directiv- ity. Most of us don’t have room for Beverage antennas, but a small loop, such as a pennant, K9AY, or flag antenna, is easy to build and use.