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K9ay loop preamp. html>znio
. After a few post on the K9AY group about comparing a Beverage with the K9AY, I understood that I wouldn't get the same result even when connected to a preamplifier. 144 MHz antenna preamplifier. It consists of a wire loop of any convenient shape Now for the results. It consists of a wire loop of any convenient shape Feb 9, 2018 · The antenna combines magnetic (H) and electric (E) field reception in order to create a directive radiation pattern. Only one loop operates at any instant in same time, the operator switches between the two loops to select perpendicular receive directions. A 7. If not, I'll just bypass that part of the circuit. I built this kit about 5 years ago Figure 1—A comparison of the real estate needed for four EWEs and the K9AY Loop system shows that the loops need only 1/7 the area of the EWEs, yet they provide the same directional patterns. Ham Radio Station Design (PDF) Universal box for K9AY or 4-way Bi-Dir beverage system - there are BPFs and Preamp only in K9AY++ feeder, not for beverages! If you want to use K9AY and 4-way beverage system with BPFs and Preamp, this is better solution K9AY/4-way controller + simply K9AY; Including Bias Tee AC/DC; HPF > 50 kHz as AC noise eliminator; Front End protections mmic preamp using an mar-6 by bill parmley. Low Band preamplifier for Beverage antennas. The K9AY is terminated loop. When in doubt, run tests with gradually increasing power -- with preamp switched in and out. The parts list is as follows: Mar 1, 2024 · Performance is similar to a K9AY loop but because of the smaller size, additional preamplification is required and a 30 dB preamp is usually used. A 9:1 impedance-matching transformer is connected from one end of the loop to the ground and a terminating resistor is connected the other end of the loop to the ground. A 9:1 impedance-matching transformer is connected from one end of the loop to the ground and terminating resistor is connected the other end of the loop to the ground. Credits to KK5JY for his LOG balun which I used for thi The K9AY Terminated Loop A Compact Directional Receiving Antenna If the loop is too small, a low-noise preamplifier may become necessary. One of the reasons that DX Engineering invested in becoming the owner and manufacturer of the amazing RF-PRO-1B Active Magnetic Loop is because the preamplifier design is very stout and capable. The author's antenna provides ample signal strength on both the 160- and 80-meter bands without a preamplifier. Listening to a broadcast station with the K9AY on 1500 KHz, the station is S6-7 in the right direction and S3 in the reverse. All materials are included in the AYL-M mast, wire and hardware kit, or you may choose to construct the loop from As far as I can tell, the K9AY can stand another 10dB amplification in the form of an excellent quality preamp without problems, provided that signal levels in general are on the low side. Intermod. My Experience with Beverages on 40 Meters. com 1 Array Solutions 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 Jul 16, 2024 · Pre-Amps: Next I started looking for a pre-amp and chose the popular Norton design. 7 to 4 MHz range, the absolute minimum is an AM MW bandstop rejecting the strongest AM broadcast signal. the loop using ‘homebrew’ construction, we also offer the AYL-M kit that includes a mast, wire and all the hardware needed to construct the antenna. 50. I also have a Clifton Labs 20 db preamp in the shack, but rarely need it since the loops put out sufficient signal and noise that I do not need any further amplification beyond what about the K9AY Loop System, which seemed to be a good alternative, and required much less space. Technical Articles by K9AY: How to Build the K9AY Loop Receiving Antenna. Nulls are present not only in the back of the loop, but on the sides too. Aziloop offers two antenna modes in one product: K9AY mode, where Aziloop operates as a K9AY terminated loop giving a uni-directional cardioid pattern. A complete set of chip capacitors is included with the boards. A K9AY Loop Benefits Significant SNR improvement over TX antennas on 160 & 80 Okay on 40, useful from 300 KHz to 30MHz if you home-brew Steerable null (QRN, QRM, Local Noise) Front lobe VERY broad Best LF receive performance for the size 1 λ Beverage = 550 feet K9AY = 30 ft long, 25 ft high, single support While browsing my paper archives, I found two folded, together stapled paper sheets with almost unreadable pictures of a control box for the K9AY loop receiving antenna * (a note see below) and a preamp with filtered input which was unreadable at all, however the schematic recalls the already published K9AY design using the 2N5109 CATV transistor. Both the Pre-Amp and BPF can be turned on/off using small signal relays, activated by small toggle switches at the RF unit, or from the shack from the controller. Note that the version of this preamp presented in ON4UN’s Low Band DXing, 4th edition, is wrong—if you see IK4AUY’s web site you shouldn’t miss it. Something around 10 dB, low noise (obviously), low parts count, and rugged. There are a lot of websites with data of this loop. Two K9AY loop system is super By Al Merriman - K4GLU July 4, 1998 The two loop system is up and running. K9AY-40mtrsCW Posted in Amateur Radio More info on the K9AY loop By Al Merriman hcdx list, July 10-11, 1999 My loops are 90 feet in length and with a 15db preamp give signal levels comparable to my K9AY Loop antenn för (40), 80 och 160 meterFrom Array Solutions comes this control box AS-AYL-4 for assembling a low band receiving antenna in four directions based on the famous K9AY loop concept. michaels null steerer amp. Here are the instructions for constructing the loop itself. 73, Gary K9AY Comparisons to Beverage antennas Gary, K9AY, has made life simpler for us. Here are some hints and tips for building a high performance antenna preamplifier for the 160 and 80m bands, which can be used to boost signals of a K9AY loop, beverage, etc. Hi all, I'm intending to put up a K9AY loop from Array Solutions once they start shipping, but I have a couple of questions: 1) The control box contains a preamp; just wondering if I should ignore the internal one and get a high-end model, maybe something like an RPA-1 from DX Engineering? I use this tuner / preamp on a 160M full wave loop and my K9AY Loop Controller. Also describes a scaled-down version of the loop. ISO-1 — Coax transmission line isolator Although the T2FD's signal strength is stronger than the loop, the loop wins out at times, as it can reduce the ARO QRM on LSB, and noise. -- Apr 2, 2011 · Most of the time, this preamp is switched off and out of the circuit. As far as I can tell, the K9AY can stand another 10 dB amplification in the form of an excellent quality preamp without problems, provided that signal levels in general are on the low side. 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 system control voltage. Use on 80m: the loop can also be used on 80m. Once I enabled the preamp, I had plenty of signal to work with. The total loop circumference is determined by the user; I sized this K9AY as 86 ft. K9AY Loop Low bands 4 direction recieve antenna for DXing. It is advantage of filtering and amplification small signals directly from antenna. To compensate, the preamplifier provides 15 dB gain, with a filter that passes approximately 1. GM4UBJ Rating: 2017-11-27; PCB and component kit Time Owned: more than 12 months. The EWE, Pennant, Flag and others all operate A preamplifier providing this gain, along with excellent bandpass filtering for 1. 10 ft. I was hopeful that the new K9AY, with the closed loop construction would be advantageous (I'd already tried the flag; only recently the pennant). Antenna has got Band Pass Filters and Preamplifier in the feed point of the loops. My experiences with ground plane requirements differ from your statements, but I am will point out one difference in the sites at the end of this message The AY Technologies AYL-4 K9AY Loop Control system provides the electronic portion of the K9AY Loop receiving antenna system. This box contains a Dallas Lankford inspired CBTF preamp (highly recommended, by me !) and a 10 turn pot for control of the current to the Vactrol. I picked up a FAR Circuits kit for a complete K9AY loop system at Dayton, and am building it now. The EWE, Pennant, Flag and others all operate The AYL-4 consists of two units, an indoor control box and an outdoor direction-switching relay box. EWE's, Flags, Pennants, and K9AY loops are effective methods of building two-element broadband vertical arrays. 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 As the loop’s size gets smaller, however, the desired signal strength is also reduced. 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 system control voltage. 160m coax shield choke. Frank extends the idea by showing a method that can adjust the directivity electrically with some simple resistor switching. The Wellbrook K9AY antenna I purchased incorporates a low-noise 15-dB preamp; a version without the preamp is also available. 00. 4-way K9AY Loop System. The author's antenna Jan 20, 2010 · Many times the Signal to Noise is better on this coax loop than the K9AY Loop. If you don't want to make the loop using 'homebrew' construction, we also offer the AYL-M kit that includes a mast, wire and all the hardware needed to 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. The AYL-4 is used with two loops installed using a single support, oriented at right angles to one another. The signals on 160 meters were indeed weak, but the noise was relatively low compared to the dipole. My analysis of a ‘real world’ Mini K9AY is slightly different. Related Posts: The K9AY receiving loop antenna; Shortwave Broadcasting and the free press; HF VHF receiver diplexer; It is easy to understand why "loop" systems, even very small loop systems, have become popular. 1 5 f t Top, bottom corners: 4 i n. 160m mast: 20ft 1½in sch 40 UV-resistant electrical conduit over ground rod Guys: string. Includes relay switching box, adjustable terminations, High performance pre-amp with BCB and SW filters, as well as a mast and wire kit built to military standards, small footprint too. I have a separate ARR wideband preamp here, which I have used with K9AY loops in the past with some success, but wonder if the FAR Circuits design would be better for 160 and maybe 80. It is terminated with a resistor. As with all small loop antenna's, it is recommended to boost the signal by inserting a preamplifier with a gain of at least 15 dB. Typically two such loops are erected, at right angles to each other. Jan 30, 2017 · The preamp in the Array Solutions control doesn’t cover 40 meters, so the signal strength drops a little, but the Signal to Noise ratio is still superior on the K9AY loop. All materials are included in the AYL-M mast, wire and hardware kit, or you may choose to construct the loop from Since Mini-K9AY has weaker gain than its big brother (on MW about 30 dB and in tropical bands about 10 dB less), I recommend using a good-quality, low-noise preamplifier. Ideal for portable use as well as for home installation. SDR preamplifier 1 – 200 MHz. If you don't want to make the loop using 'homebrew' construction, we also offer the AYL-M kit that includes a mast, wire and all the hardware needed to Hi all, I'm intending to put up a K9AY loop from Array Solutions once they start shipping, but I have a couple of questions: 1) The control box contains a preamp; just wondering if I should ignore the internal one and get a high-end model, maybe something like an RPA-1 from DX Engineering? The total loop circumference is determined by the user; I sized this K9AY as 86 ft. 8 - 4 Jul 27, 2016 · K9AY loop RX antenna feeder: fixed or variable Rload. Kennedy, 2008 k9ay loop antenna installed at pa6z contest group this is a receiving antennas for the low bands 160m 80m and 40m include schematics and info on a building the control box preamplifier and low pass filter. Terminated Loop Basics The K9AY Loop is one of several published designs that use a terminated loop to get a directional pattern in a small space. Beverage antennas, K9AY Loop, Waller Flag, Pennant Loop etc. I have an external preamp for the loop and I use the K3 preamp too. from the Loran C appears very quickly if linearity is compromised; connecting the Wikander 10dB preamp to the K9AY did not cause any AYL-4 — 4-way K9AY Loop System Package contents: AYL-4C control box with filter/preamp AYL-4R outdoor relay box DC power connector 6-pin DIN connector You will also need: 1. It comes with a control box (se photo) and an external rely box that is mounted at the mast. The loop could be made smaller, but I wanted to collect enough signal energy so that even a modest preamp (such as those included in most HF rigs) can be used. Custom configurations are available — just ask. The control box includes a 15 dB preamplifier with a bandpass filter covering the 160 and 80 meter bands. 8-8 MHz (160/80/40M) AYL-4 — 4-way K9AY Loop System (with adjustable termination resistance) plus special order filters, power combiner/dividers Array Solutions – Wolf RF Systems – AS-AYL-4 Directional Loop Antenna 972-203 2008 e-mail sales@arraysolutions. 5 MHz. The initial results were encouraging. Buy History “The K9AY Terminated Loop-A Compact, Directional Receiving Antenna,” QST, Sept. If the loop is too small, a low-noise preamplifier may become necessary. ISO-1 — Coax transmission line isolator As far as I can tell, the K9AY can stand another 10dB amplification in the form of an excellent quality preamp without problems, provided that signal levels in general are on the low side. Broadside array reduces azimuth antenna pattern. 160m preamplifier. Mark Connelly once described it as "heart-shaped". TRX-16 — 16:1 Receiving Antenna Transformer. Single K9AY loop. 3m t 10 . May 6, 2018 · Very deep nulls (only about 2º wide) off both sides of the loop mechanically rotate the loop until the single local RFI source is nulled the null is not as deep for skywave propagated signals Small loop antennas produce very low signal levels requires a high gain, low noise figure preamplifier As the loop’s size gets smaller, however, the desired signal strength is also reduced. Anyhow, while it shows substantial directivity on broadcast stations, I was surprise by how much the K9AY loop's sensitivity suffers compared to my inverted L. There is example for space S = 30m. Let’s Build It! Connelly's loop version Mark Connelly's version, with drawing, of a K9AY loop. Offers extremely high dynamic range with very low noise figure with a wide variety of uses from 1 to 200MHz. Figure 8 loop in guy rope supports wire. The EWE, Pennant, Flag and others all operate The loop could be made smaller, but I wanted to collect enough signal energy so that even a modest preamp (such as those included in most HF rigs) can be used. 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). FM 88 – 108 MHz preamplifier. Controller is able to control also Bi-directional 4-way system. Jan 2, 2011 · Hi Dave, I would say try the Loop first with just the Flex6K preamps. 00 Jan 12, 2010 · The K9AY antenna is a small antenna configured like a loop, with one end grounded. Broadside 2el K9AY. Low Band preamplifier for Beverage antennas. Each loop provides reception from two directions when the feed point and termination are reversed, for a total of four separate patterns. Somewhat bigger than the K9AY loop, the VE3DO loop is a larger variation of the flag antenna. There have been several occasions, however, where an extra 10 dB made the difference between no copy and good copy. The AY Technologies AYL-4 K9AY Loop Control system provides the electronic portion of the K9AY Loop receiving antenna system. Another simulation for the broadside array. I also use the attenuator on the vertical. Size of the loop in the EZNEC file is the same as on all those sites. I am not affiliated but the KD9SV dual Band preamp for 160/80 ( I think DXE sells these now) would be a perfect match. ” To get the required 180º phasing, I modified the standard K9AY Loop switch unit so that one loop had reversed phase when either endfire direction was 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. If you don't want to make the loop using 'homebrew' construction, we also offer the AYL-M kit that includes a mast, wire and all the hardware needed to Universal box for K9AY or 4-way Bi-Dir beverage system - there are BPFs and Preamp only in K9AY++ feeder, not for beverages! If you want to use K9AY and 4-way beverage system with BPFs and Preamp, then this is better solution + simply K9AY; Including Bias tee AC/DC for RX antenna; HPF > 100 kHz as AC noise eliminator (80 dB at 20 kHz) Front End It works OK in EU, but it is still not a super RX antenna unless you use an array of 2 or more phased K9AY loops. Airband preamplifier 108 and 137 MHz. The AYL-4 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 K9AY Loop antenna wire, support and ground system. Broadside 4el K9AY. Gary Breed, K9AY, developed a receive loop system that takes up very little space. Resources listed under K9AY Antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. “Modeling the K9AY Loop” by Gary Breed, K9AY “More EWEs for You” by Floyd Koontz, WA2WVL “Simple Direction‐Finding Receiver for 80 Meters” by Dale Hunt, WB6BYU “The AMRAD Active LF Antenna” by Frank Gentges, KØBRA “The Snoop‐Loop” by Claude Maer, WØIC 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—A comparison of the real estate needed for four EWEs and the K9AY Loop system shows that the loops need only 1/7 the area of the EWEs, yet they provide the same directional patterns. 80m match. -- Read more --One step further: two loop system Having adapted the original ham K9AY loop, Al Merriman took the antenna one step further, by setting up a two K9AY loop system. com 1 Array Solutions 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 AYL-4 — 4-way K9AY Loop System Package contents: AYL-4C control box with filter/preamp AYL-4R outdoor relay box DC power connector 6-pin DIN connector You will also need: 1. Low Band preamplifier for K9AY Loop, Waller Flag, Pennant Loop, etc. Hear what your missing on the low bands including DXing in the MW and LW bands. 1997 Performance varied: Great, Fair, Poor Most had 60 Hz hum Hum problem resolved, QST, May, 1998 Binocular Terminated Loop Basics The K9AY Loop is one of several published designs that use a terminated loop to get a directional pattern in a small space. When we were hit by a nearby strike (see lightning protection page), the vactrol went down along with the balun. All materials are included in the AYL-M mast, wire and hardware kit, or you may choose to construct the loop from AYL-4 — 4-way K9AY Loop System Package contents: AYL-4C control box with filter/preamp AYL-4R outdoor relay box DC power connector 6-pin DIN connector You will also need: 1. ISO-1 — Coax transmission line isolator On 160m I have a small ferrite loop which I use for diversity together with my transmitting antenna, a vertical. There is example of the single loop at 160m. This is the schematic of the relay board and preamp combined: K9AY antenna controller with preamp. 160m match. The base of the supporting pole and the ground rod are located at the center. Feb 9, 2018 · 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. Later added provision for a 160-80m Bandpass filter as well. I sprung for the model AYL-4. $4. 10m 28 MHz preamplifier for bad propagation situation. More parts soon: - K9AY switch with 3 BPF and preamp - 9 RX antennas switch with 3 BPF and preamp - contollers. All materials are included in the AYL-M mast, wire and hardware kit, or you may choose to construct the loop from Extensive listening tests confirmed that these patterns are readily achieved with two K9AY Loop crossed pairs, constructed to be as identical as possible, and with no special “tweaking. qst jul94. With the AYL-M kit, 21 feet in each of the four directions is required. 36½ in. It is a specialized adaptation of the famed Norton Amplifier, a design achieved by the brilliant engineer and owner of Clifton Laboratories, Jack Smith This is remote version of small four directional RX antenna for lower HF bands with controller. Listed under the Antennas/40M/40 meter Loop Antennas category that is about Loop Antenna projects for 40 meters band. At 160 and 80 meters, coax loss is very low, so a preamp located at the receiver is usually sufficient. My other idea is to add a preamp right at the antenna to overcome transmission line loss and the loss from a 4 port passive receiver coupler. a k9ay loop antenna project done with far circuits pc boards for the antenna switch and bandpass filter and preamp by k7sfn. k9ay loop antenna kit. k9ay loop antenna kit click( here for more details) $48. 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 the loop using ‘homebrew’ construction, we also offer the AYL-M kit that includes a mast, wire and all the hardware needed to construct the antenna. Beverages: How Short Can They Be? Filter/Preamp used in the AYL-2, AYL-4, PRE-1 (1. loops. The ability to tune both the 160 and K9AY loops and the fact that this unit lets you switch 2 receive antennas between 2 K9AY loop Antennas category is a curation of 12 web resources on , Receiving antenna for low bands, K9AY 160m 80m receiving loop antenna, K9AY Flag Pennant Ewe. 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. AYL-4 — 4-way K9AY Loop System Package contents: AYL-4C control box with filter/preamp AYL-4R outdoor relay box DC power connector 6-pin DIN connector You will also need: 1. It consists of a wire loop of any convenient shape Figure 1—A comparison of the real estate needed for four EWEs and the K9AY Loop system shows that the loops need only 1/7 the area of the EWEs, yet they provide the same directional patterns. The array consists of two diamond shaped wire loops at right angles. VE3DO Loop. The signal strengths are comparable between the k9ay with the 15 db preamp and the vertical. And the rear null is next to amazing. 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. All materials are included in the AYL-M mast, wire and hardware kit, or you may choose to construct the loop from the loop using ‘homebrew’ construction, we also offer the AYL-M kit that includes a mast, wire and all the hardware needed to construct the antenna. This includes a 4-direction loop system. It consists of a wire loop of any convenient shape 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). The basis for the preamp was a schematic with a 2N5109 transistor, which is a CATV device offering high signal capability at frequencies till about 1 GHz. More information on the antenna's operation can be found in the sidebars "How Does the Terminated Loop Work?" and "Summary of Characteristics. All materials are included in the AYL-M mast, wire and hardware kit, or you may choose to construct the loop from 4-way K9AY Loop System. This system provides a cardioid directional pattern in four different directions. I highly recommend an input bandpass filter covering the 1. Last Updated December 8, 2022 AY Technologies LLC E-mail: gary@aytechnologies. Most past products are available upon request. 160m K9AY loop 4-way K9AY Loop System. 5 MHz, is included with the AYL-4 systems. cornell wide band receiver amplifier. There is example for 4el K9AY space S = 30m - some more optimization could be done there. Each loop is fed through an impedance transformer against ground. After listening extensively for two weeks, I am very impressed. 5 MHz) PRE-2 — Remote-powered preamp, 1. 8-4. TRX-16 — 16:1 Receiving Antenna Transformer Aug 30, 2010 · So, I had purchased the parts to build a nice balanced preamp based on a QEX article by IK4AUY (this design is actually based on an even older Ulrich Rohde design). AYL-4 — 4-way K9AY Loop System Package contents: AYL-4C control box with filter/preamp AYL-4R outdoor relay box DC power connector 5-pin DIN connector You will also need: 1. K9AY 160m 80m receiving loop antenna A K9AY loop antenna project done with Far Circuits pc boards for the antenna switch and bandpass filter and preamp by K7SFN #hamradio #hamr K9AY loop receiver preamp 2pcb and component kit. All materials are included in the AYL-M mast, wire and hardware kit, or you may choose to construct the loop from It has been said that the K9AY has a uniform nearly 270-degree main lobe, and a sharp, V-shaped back null. Apr 4, 2011 · mmic preamp using an mar-6 by bill parmley. 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. End-Fire 2el K9AY. It consists of a wire loop of any Basic 8x2 — 8 antennas switched between two receivers, with preamp/filters. It attenuates unwanted signals with up to 30 dB. A preamplifier of 18-20 dB gain with input filtering is a must. 160m loop: 12m insulated Building antennas is always a blast!Acknowledgements:Credits to K9AY for his design of the base loop. The other end of the loop is grounded through a resistor in the 500-800 ohm range. Ham Radio Station Design (PDF) It is easy to understand why "loop" systems, even very small loop systems, have become popular. " Cable tie connects loop wire to post. Shorter circumferences could be used for shortwave-only performance. All materials are included in the AYL-M mast, wire and hardware kit, or you may choose to construct the loop from The green and yellow toggle switches were added for loop and direction control. But the k9ay definitely has a lower noise figure. $8. radio fun magazine aug93. The antenna described here is small enough to fit into a corner of almost any backyard. 1 in. You may well find that will be sufficient. 6 m preamplifier. Universal box for K9AY or 4-way Bi-Dir beverage system - there are BPFs and Preamp only in K9AY++ feeder, not for beverages! If you want to use K9AY and 4-way beverage system with BPFs and Preamp, then this is better solution + simply K9AY; Including Bias tee AC/DC for RX antenna; Front End protections; RF power limiters in RX line I found that there was no dramatic change from one design to another. Dec 24, 2018 · k9ay loop switch and preamp Description: Two board set consist of a loop antenna switch and switch impedance load board and a bandpass filter/preamp board. This is an ideal Low Band preamplifier for. Dual Mode – Loop and K9AY. Jan 4, 2020 · The preamps in my FTDX-3000 also were suitable, and you may find that the preamps in your Radio are also sufficient. and S9 +10 on the inverted L. I found a good schematic of preamplifier, offering up to 20 dB gain, a high 3rd order intercept point, and a bandpass filter at the input rejecting signals from the AM broadcast band and above 4MHz. Array Solutions – Wolf RF Systems – AS-AYL-4 Directional Loop Antenna 972-203 2008 e-mail sales@arraysolutions. com Like all small antennas, the K9AY Loop is much less efficient than your transmitting antenna or a Beverage receiving antenna. from the Loran C appears very quickly if linearity is compromised; connecting the Wikander 10dB preamp to the K9AY did not cause any Basic 8x2 — 8 antennas switched between two receivers, with preamp/filters. The experimental setup involve running the K9AY loop output either directly into the spectrum analyzer or through either an 80 meter band pass filter or a broadband ARR preamplifier or both. The K9AY is terminated loop RX antenna. This may be true for the 2-loop K9AY, but the 4-loop K9AY seems to have a different signal pattern. It consists of a wire loop of any convenient shape AYL-4 — 4-way K9AY Loop System (the original design!) AYL-M — Mast, Wire, Guy and Hardware Kit for K9AY Loops PRE-1 — Outdoor Preamplifier for 160/80M (1. Line amplifier wideband. Listed under the Antennas/K9AY category that is about K9AY loop Antennas. If not, then look into the external preamp solution. The figures following show the direct input, the input with the band pass filter in line, the input with the preamp in line and the input with the filter 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. In a word, super! There is no question that in many cases the front to back on the loops is superior to a pair of slopers and I've not run into any situation yet where it was worse. Demo How to make one Build & test your own matching transformer What’s Important and What Isn’t Grounds, Ground, Location Make vs. The meter is a logging scale which allows accurate resistance knowledge of the Vactrol. The simplified 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. Low Band DX unconditionally stable preamplifier for Beverages, K9AY Loop, Waller Flag, Pennant Loop etc. The EWE, Pennant, Flag and others all operate using the same principle as the K9AY Loop, and they all provide a cardioid pattern with one deep null. 73 in. 75 to 4. 2 m high mast is needed to raise the wire antennas K9AY loop receiver preamp 2pcb and component kit. All materials are included in the AYL-M mast, wire and hardware kit, or you may choose to construct the loop from First tests confirmed the almost identical properties like K9AY loop, there is no noticeable difference. Loop mode, producing the classic small loop figure-of-eight bi-directional pattern at low angles, and omni-directional pattern at higher angles. It averages from 2 to 3 s-units. I built this kit about 5 years ago In a few cases where the loop and TX antenna are quite close, the AYL-4 itself needs protection. It helps a little, but there are lots of better 160m receiving antennas like the K9AY and Beverage. Basic 8x2 — 8 antennas switched between two receivers, with preamp/filters. This is a complete kit less, cabinet, power transformer, and selector switch for $48. Arrays of terminated loops vertical elements produce effective low-angle receiving performance along with a somewhat clean pattern. ~ K9AY Loops ~ Thanks Gary Breed, K9AY! de N4GG © Harold E. 00 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). 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 Basic 8x2 — 8 antennas switched between two receivers, with preamp/filters. Directivity on this band is about 7,3 dB. 60 Meters As expected, the 30 meter dipole's signal strength is 2 S-units higher than the K9AY loop. Just send an e-mail to ask! TRX-9 — 9:1 Receiving Antenna Transformer. I use the built in preamp for the 160M loop, but do not use the built in preamp along with the K9AY Loop Controller - which already has a preamp. 80m coax shield choke. qst aug88. 30 ft. Feb 14, 2011 · K9AY antenna controller with preamp. The terminated loop (see Figure 2) is physically and electrically quite simple. I have an A/B switch in the shack so that I can switch between the 2 loop antennas. kkakny umow bbwda ihwrrrkd vtgd znio toswmzd yvm dltc iurn