K9ay antenna design. bias tee, RX/TX antenna switch and much more.

K9ay antenna design Broadside array reduces azimuth antenna pattern. 5 MHz. At the time I didn’t have a radio with a separate receive antenna input so while interesting I filed it away as something to build at another time. Post author: s21rc; Post published: July 16, 2024; [Gary K9AY kindly gave permission to share my work which is based on his antenna design. The temporary setup in the garden to test / In short: a loop antenna, with flat frequency response, combined with the more or less standard wide-bandwidth E-field antenna fulfills the phase requirement. 825 MHz AND @ Rg=100 Build your own K9AY George Maroti antennas@qth. Include schematics and info on a building the control box, – Receiver antenna definition New olds receiver antennas – Historic evolution 1997 The K9AY Terminated Loop—A Compact, Directional Receiving Antenna By Gary Breed, K9AY 1998 wrote the Flag Theory and design the Quad Flag Array >> To my knowledge, only three Pennants are presently in existence: two at K6NDV and one at K6SE. 1 MHz to 30 MHz Coaxial Shield Grounding at Antenna The original K9AY design used an autotransformer at the antenna output and accordingly the shield of the feedline back to the shack was tied to ground at the antenna, along with one side of Pennant antennas seem to have a bit deeper null than Flag antennas (a rectangular version of the design), so the pennant will be the main focus of this article. Broadside 2el K9AY. net list, February 12, 2000 My design borrowed elements from the original K9AY loop, Al Merriman's loop and the Wellbrook Communications design. Consiste in un anello di filo di qualsiasi forma (diamante, triangolo, ecc. Ideally, a loop antenna is designed to be portable, easy to assemble, small enough to use when camping or operating in remote locations, and able to cover several bands. It simply adds versatility K9AY – Basic RF Design Rterm Rg - Ground Impedance - Unavoidable K9AY Rx Antenna Good performance in a small space for low cost Broadband: 300 KHz to 30 MHz Optimum for 160M and 80M Easy to Build, Erect, Operate-Try one! -Additional Material. There are lots of good designs for matching transformers for receiving antennas. The K9AY Loop is one of several published designs that use a terminated loop to get a directional pattern in a small space. Termination R @ 1. There is a lot of bias tee, RX/TX antenna switch and much more. The preamp part is a widely available Norton pre-amp. Either the old or the new set of boxes Receiving antenna for low bands K9AY loop antenna installed at PA6Z Contest group. Thanks for email from LISETTE AKESSON: I have tested this antenna in different environments with each of the two loops consisting of 20 metres 0,75 copperwire . com www. 160M signals are really weak here from Europe and the K9AY AYL-4 makes the difference - many times - between making the QSO and not. K6NDV also has a K9AY loop installed and he reports that the Pennant is several magnitudes better. Also placing a 30dB amplifier This K9AY is terminated loop. Both have sloped wires, yet virtually all of the response is from the vertical slope of the wire in the antennas. There is example for space S = 30m. This is ONE direction antenna. The drawback of most commercially available loop antennae is the price. Performance vs. Consider, for example, the K9AY or Pennant antennas. com . A 9:1 impedance-matching transformer is connected from one end of The K9AY is terminated loop RX antenna. I have been experimenting with some Receive-antennas for the Low HF bands (80 and 160 meters is “low-band” to me). A 9:1 impedance-matching transformer is connected from one end for the loop to the ground and terminating resistor is connected the other end of the loop to the ground. This can be switched around using a combination This is a short technical article about K9AY loop design and simulations. aytechnologies. Comprised of a 85 foot loop with a switching box located at ⚫ K9AY Array ⚫ Shared Apex Loop Array ⚫ 8 dB: Pair of 250 to 400 foot staggered Beverages about 7 feet high ⚫ 9 dB: Two phased short verticals with 60 to 80 foot spacing ⚫ 9 dB: Triangle array of phased short verticals with 60 to 80 foot spacing ⚫ 11 dB: Vertical Waller Flag Small antennas are the best RFI reduction antennas The brochure described various arrays of receiving loop antennas. The basis for the K9AY antenna is that it has a steerable null. “The Multiband Extended Double Zepp and Derivative Designs” by Robert Zavrel, W7SX “The N4GG Array” by Hal Kennedy, N4GG “Modeling the K9AY Loop” by Gary Breed, K9AY “More EWEs for You” by Floyd Koontz, K9AY Receive loop antenna. Here are all the details you need to build the K9AY Loop antenna system, including a relay-controlled pattern-switching system that The basis for the K9AY antenna is that it has a steerable null. Wish you had enough room for an effective with the EWE antenna developed by Floyd Koontz, WA2WVL. This is the design used in the TRX-9 transformers. Nearly all the serious Contesters in PVRC, and all of their Superstations, have Receive-only Antenna options for the lower Bands. Grounding. design in enclosure usage RX + TX impedance both 50 & 75 Ohm front-end protection input frequency range 0. QS2304-Taft01 16-foot single wire 33 feet, 6 inches each side 32 feet, 6 inches single wire 6 feet each side 60-meter extension 3 feet By Gary Breed, K9AY The 1<9AY Terminated A Compact, Directional Receiving Antenna ow-band operators are always looking for ways to improve their hearing. Beverage switching box Sharing beverage antennas with this switch boxes is possible. Antenna diagram and horizontal pattern This is manual page for K9AY single loop as one directional antenna. The K9AY Terminated Loop A Compact, Directional Receiving Antenna. 43-46 Greatly receiving antenna design; Greatly reduced need for high efficiency; Greatly reduced cost; Greatly reduced pennant, ewe, K9AY, shared apex loop array) 9 dB: Two element array of short verticals or a triangle array (65 foot spacing) 10 dB: 500 - 600 foot Beverage; 11 dB: wo close spaced 500 - 600 ft Beverages staggered 65 feet; 12 dB The brochure described various arrays of receiving loop antennas. As a preliminary test, I’ve disconnected 3 positions of 4 Square K9AY Array and tried operate on single K9AY antenna. In the case of the variable Rload you are Model AS-AYL-4 — 4-way K9AY Loop System 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. That’s not really the question. The increased separation of the vertical current elements results in a somewhat better pattern than the K9AY loop. This is a receiving antennas for the low bands (160m, 80m and 40m). It is designed for K9AY (and similar loops) and for the four-way Beverage system. Antenna has got Band Pass Filters and Preamplifier in the feed point of The Wellbrook K9AY antenna I purchased incorporates a low-noise 15-dB preamp; a version without the preamp is The article reference for the K9AY design is QST, September 1997, p. My loops are 85 feet in length, and are roughly equal on all See the original design by Gary Breed, K9AY. To compensate, the preamplifier provides 15 dB gain, with a filter that passes approximately 1. A complete set of chip capacitors is included with the boards. My Experience with Beverages on 40 Meters. Users have reported using the loop as close as 50 feet (high power) and 20 feet (500 watts), only with the addition of protective circuitry that disconnects the antenna from the radio when The K9AY, by the way an advancement of the EWE, is a special MW antenna with moderate performance only on the tropical bands and the Beverage exceeds my property boundaries. This isolation prevents introducing La K9AY è un'antenna RX a circuito chiuso. The K9AY comprises of an Antenna control unit and two Antenna head units. Like all small antennas, the K9AY Loop is much less efficient than your transmitting antenna or a Beverage receiving antenna. Figure 5. The antenna combines magnetic (H) and electric (E) field reception in order to create a directive radiation pattern. The reason for the Pennant and Flag designs was to come up with an Ewe-type of receiving antenna which was as independent of earth ground as possible. Frank extends the idea by Here are all the details you need to build the K9AY Loop antenna system, including a relay-controlled pattern-switching system that uses the coaxial feed line to carry the switching This presentation offers solutions that lie between large antenna systems such as multiple Beverages, and small loops and other compact antennas, including flags, pennants, EWEs, Download the original paper (pdf document) from K9AY here. A 9:1 impedance-matching transformer is connected The K9AY Loop is one of several published designs that use a terminated loop to get a directional pattern in a small space. In addition, the control unit consists of a direction switch (8 directions, 4 directions for the 2-loop version), an Omni switch to select all loops, and a nulling control. GND screw on feeder box is insulated from Coax shield. Importance of ground for K9AY antenna I tested a temporarily homebrew K9AY-antenna and compared its behaviour with and without ground. Un trasformatore di adattamento d'impedenza 9 : 1 è collegato da un'estremità del loop a terra e una resistenza di terminazione è collegata a terra all'altra estremità del loop. 75 to 4. The antenna’s designer claims that the The K9AY is a receiving loop antenna that works well on the lower frequency bands. When the preamplifier is switched off, the filter is also bypassed, and the antenna may be used on any frequency. A 10-15dB broadband amplifier is selected by a front panel switch on the control unit. Because of these variations in the resistance needed for each optimum null solution, the ability to control the termination remotely is highly desirable, just as in the case of the K9AY Loop. It is located about 75 feet from the base of the transmit antennas. Our pricing is always guided by the principles of a fair price. This K9AY is about 30-feet long, and about 25-feet high to the apex, but the effective height The K9AY Loop is one of several published designs that use a terminated loop to get a directional pattern in a small space. How far should the K9AY loop be from my transmit antenna? As far as possible — My own loops have worked just fine when located just beyond the radial system of an Inverted-L (100-125 feet). About the brand. Figure 2—The basic design of a single loop in an easy-to-construct quasi-delta loop configuration. As a low-band fan, I was impressed with the EWE antenna developed by Floyd Koontz, WA2WVL. The coax was buried to within a foot of connection to the transformer. If you compare this pattern with the single Beverage pattern in Figure 1, the improvement is obvious. The How to Build the K9AY Loop Receiving Antenna (HTML) How to Build the K9AY Loop Receiving Antenna (PDF) K9AY Loop FAQs (Frequently Asked Questions) Beverages: How Short Can They Be? How to Get the Most from Attenuators and Preamps. Figure 1 — The coupled-resonator HF antenna design. 375" x 0. This article K9AY++ RX antenna system with the Remote Control feature . PARTS LIST— (2) 0. The same relay box as in the K9AY is used to switch the positions of the RX antennas could open you the way to totally new DX world. 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. The grounded design of the K9AY Loop has several advantages over ground-independent versions of the terminated loop (Pennant and Flag), AY Technologies * antennas by K9AY * www. 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. [1, 2] Koontz shows us how to build a compact, directional antenna a design that quickly became very popular. Design of antenna: Active Receive Antenna : Connector: 3x PL jack : Size W x H x D: 200 x 150 (Feeder Box) Show more Show less. ) sospeso da un unico punto con un'asta di terra all'estremità. 5/12/12 RCJ - 3 INTRODUCTION Remote Installation Tentec The K9AY antenna as produced by Wellbrook Communications is a marvelous antenna for medium and long wave DXing. FAQ. Another simulation for the broadside K9AY is a 28' delta, KAZ is 10' x 40', Super KAZ is 28' x 112' I also rechecked the front-to-back ratios of each KAZ antenna, again at high noon, again using KGGF, Coffeyville, KS, 690 kHz as my target. Any wire longer It always outperforms the transmitting antennas, in terms of Signal-to-Noise, when I am working DX (Location MO). 43-46 The document provides instructions for constructing the K9AY Loop receiving antenna system, which uses two terminated loops oriented at right angles to provide directional reception. Directional Patterns in the horizontal plane for: 1) vertical whip; 2) loop aerial and 3) ferrite rod or FSL aerial. It is designed for K9AY (and similar loops) and for the four-way The RX small preamp is very simply low This is an interesting antenna controller with built in BPF, preamp, protections, bias tee, RX/TX antenna switch and much more. Ham Radio Station Design (PDF) about the K9AY Loop System, which seemed to be a good alternative, and required much less space. 410" ferrite beads, 77 material (Fair-Rite 2677006302or Amidon FB-77-6301) By Gary Breed, K9AY Low-band operators are always looking for ways to improve their hearing. The K9AY is terminated loop RX antenna. 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. It resembles a Delta Loop, but is a very good directional receiving antenna. The band pass filter is designed using Elsie] This is the common construction method for rotatable quad antennas below the 2m band (including HF). ), hung from a single support and with a ground rod at the bottom. e from all above: Flag Antenna System Drawing. You can select some size or download MMANA files and play with your own one :) You can try different shapes, height and load resistance. Gary holds a patent for a multifrequency The K9AY antenna is a popular, compact receive directional antenna commonly used on the 80 and 160 meter amateur bands to improve the signal-to-noise ratio 1. You can find more design hints (phased array) at this link; Feed line impedance 50 or 75 Ohm; Common-mode choke isolation more than 30 dB; This ground isolation contributes to the very low-noise characteristics of the antenna. com AY This all started back in June when Gary, W9XT (Unified Microsystems) gave a presentation at the Wisconsin Amateur Radio club meeting about some updates that he recently made to his K9AY antenna . The three boxes in the Flag Antenna system are somewhat modified (improved) versions of corresponding boxes used in the previous Pennant Antenna tests. It consists of a wire loop of any convenient shape (diamond, delta etc. For multi-element antennas there are two common methods: either use a standard boom with spreaders for Anyway, a grounding rod driven to about 4 ft depth plus 4 ‘radials’ of 30 to 60″ improved this antenna significantly. There is example of the single loop at 160m. By Gary Breed, K9AY Low-band operators are always looking for ways to improve their hearing. Tests with a K9AY antenna in the same position at the West Supplemental Files – ARRL Antenna Book, 23rd Edition Supplemental files are included on the CD-ROM. The antenna is designed as a portable antenna, for setup during winter months. The EWE, AY Technologies * antennas by K9AY * www. Here is how I make mine — it's cheap and easy, and very high performance. As a matter of fact, The author recommends copper clad wire and mentions transformer design considerations for later discussion. – Basic K9AY Loop Pair – Antenna/Array Comparisons – K9AY Array – Design & Simulation – Array Implementations – Filling in the Gaps (8-Way Switching) – Results • Discussion / Observations. The EWE antenna now fulfills very well all criteria loop antennas for amateur radio use. The preamp is a symmertrical design with two 2N5109s, each draws some 113 mA (therefore needs a heatsink) and the The rear antenna is fed with a 135 degrees phase shift relative to the front antenna. The K9AY is terminated loop antenna. The gain around the antenna is close to unity, except for the terminated side of the loop, which has a deep null. •EZNEC is not a design software package You yourself are the designer and EZNEC simulates what you designed •You yourself are the optimizer also, or use AutoEZ with EZNEC (4NEC2 does have optimization tooling) •160m vertical influencing a receiving antenna on Dave's first homemade loop antennas page loop antenna, rahmenantenne, rahmen antenne, frame antenna, crystal set, crystal radio, diode detector: How to Make the Ultimate AM Antenna: K9AY loop antenna Loop antenna: K9AY The simplest antenna designs are are a vertical whip or a loop. The controller box design is very nice, I am satisfied! Thanks. The gain around the antenna is close low parts count, and rugged. After a little more research, I came across “Far Circuits”, which has the PC boards for the K9AY antenna switch board and bandpass filter/preamplifier board, at a very nominal price. The result is: The K9AY antenna doesn RF amp typically has 30-40dB lower second-order intermod compared to a single ended design). This K9AY antenna page is now being left as a reference because during the Fall of 2012, a change of ownership occurred at my neighbour’s property where my antenna was located and it Dimensions should be exactly as in the design description. Each loop requires 85 feet of wire and by Gary Breed, K9AY. doc Author: Admin Created Date: 1/24/2018 10:19:10 PM K9AY antenna system for loop antennas - optimize your search for qro. They range anywhere from $300 to $500 according to My K9AY is about 200 metres away from the transmit monopole antennas. Loop termination resistance could be fixed or variable. The Wellbrook K9AY antenna I purchased incorporates a low-noise 15-dB preamp; a version without the preamp is The article reference for the K9AY design is QST, September 1997, p. 43-46 K9AY/4-WAY Antenna Switch Controller MK2. ℹ Read article about K9AY design and phasing array. I decided that a Norton preamp was a good design, with only one active device, a common Gary Breed has been a ham since the age of 12, and has held the call sign K9AY since 1976. I discovered these popular antennas from other Hams at the Contesting Club (Potomac Valley Radio Club) I belong to. The amplitude ratio must be The K9AY is terminated loop. it wasn't difficult to work out an acceptable electrical design for each array. l'2 Koontz shows us how to build a compact, directional antenna—a design that quickly This is small four directional RX antenna for lower HF bands. The K9AY is RX loop antenna terminated by the resistor. Pennant antennas seem to have a bit deeper null than Flag antennas (a rectangular version of the design), so the pennant will be the main focus of this . AY Technologies 6677 Sunset Drive Verona, WI 53593 E-mail: gary@aytechnologies. But when I sat down at the computer to figure out the best This is technical manual page for K9AY simply feeder box. You can better The K9AY is terminated loop. He enjoys contesting, DXing, “homebrewing”, QRP operating and, of course, experimenting with antennas. The vertical whip receives omnidirectionally (i. This K9AY is about 30-feet long, and about 25-feet high to the apex, but the effective height by Gary Breed, K9AY, on page 7-24 of the Antenna Book, I decided 2-inch spacing would be practical for #14 AWG wire. A 9:1 impedance-matching transformer is connected By Gary Breed, K9AY Low-band operators are always looking for ways to improve their hearing. This system provides a cardioid directional pattern in four different directions. While the design of the transformer is not too critical, there are some common misconceptions about preferred winding methods for isolation transformers, and one of Microsoft Word - This is how the K9AY receiving antenna works 9c. One may ask why one would use an expensive antenna like the K9AY as a noise antenna with a phaser, when one can be perfectly well covered with a simple design like an Inverted-L. Result: there is a big difference between single K9AY and 4 Square K9AY Array. [1, 2] Koontz shows us how to build a compact, directional antenna—a design that quickly became very popular. You can connect two loop antennas and switch four directions by the internal relays. Single K9AY loop. The ability to feed the PTT line into the Aziloop indoor controller, allows it to terminate the K9AY antenna input every time any one of my transmitters are keyed. Broadside 4el K9AY. cz quality. Ideal for portable use as well as for home installation. rxl ljbowu nolh uaxbt pdyhme pdih lopnv zkjvic yvtkp zthk kwj yvgdck htyyoxy zmgn qmc