They are one of the easiest to design. for a Dipole or Inverted Vee Antenna. The above graphic depicts the overall layout of the loop antenna consisting of 558 ft. Construction Table I lists the bill of materials for my loop. Unlike a vertically mounted large loop, the small loop produces maximum field along the plane of the loop. 68 – Two-Bands Half Sloper for 80m – 40m. Using an open-wire parallel feedline (commonly called "ladder line") with an antenna tuner, it tunes up on the 10m band as a 5/8-wave loop as well. Though as someone commented last year, an active antenna may be simpler than a loop for receiving, at least forbmany uses. > >Usually these would be used with a ground rod and 5m vertical element. Going High-Q and High-Tech with the RX Loop at AC0C. 5 m (≈ 8 ft) PVC electrical conduit with 16 mm (≈ 5/8 inch) outside diameter. Additionally, the Mystery antenna is designed to work at least as well, on the other HF bands as a G5RV. •Small loop antenna can produce a signal-to-noise ratio that is oftentimes better than a dipole for the same band. RX antenna was an earth probe 24 ft long through a 9 to 1 ferrite transformer. M0CVO Antennas, amateur radio antennas for fixed station or portable operations, HF/6m all are catered for. At least the loop listens much better than the dipole. I have played around with a small loop antenna calculator. This link is listed in our web site directory since Tuesday Jul 7 2009, and till today "160m Delta Loop Antenna" has been followed for a total of 4775 times. Antenna loop design examples. Manyetic Loop Anten Evin Salon veya Balkonunda da çalışır VHF veya UHF Yagi anten yapmak isteyenler için Eleman bağlantı çözümü 80m 160m Long ve Short dipole antenna (Morgain) Toplam uzunluk 20m. 69 – Linear Loaded Sloper Antenna for 160m. home brew window line feed point insulator Here are a few photos and a crude drawing of my home brew, 450 ohm window line center insulator (feed line attach point). Antenna Theory - Half-Wave Folded Dipole - A folded dipole is an antenna, with two conductors connected on both sides, and folded to form a cylindrical closed shape, to which feed is given at the center. G0JHC IO83, Lancashire, United Kingdom. 10m -160m Multiband “Z” Antenna. 160M Loop Antenna Project - Marbut. Although this design has been around for a long time, it is only gaining popularity now due to the recent improvement in high power antenna tuners. You may find them to be excellent multiband antennas. antena-antena radio amatir 01 - Tee Antenna. I seem to remember 6-12 inches. The antenna length should be about a half wavelength at the lowest frequency of interest for best results. The stock cap. There are lots of recommendations for the LDG IT-100 automatic tuner, but there's a 30W limit using it for digital modes, so things like D-Star or (I assume. I then visited most of the big antenna internet sites that had modelled small loops. In addition, the input impedance is primarly real and can be approximated in Ohms by: The helix antenna functions well for pitch angles () between 12 and 14 degrees. At least the loop listens much better than the dipole. Before you say this couldn't possibly work, then have a look at this 39 second-long video of a UK long wave commercial radio transmission being received by one of my sloper antennas (hint, it's the weaker signal by far), and the ground loop antenna:. 160m Loop Antenna for TX. With a good antenna tuner the antenna will work 6 thru 160 meters. The truth is that any dipole antenna (antenna with two connections not connected to ground) is a balanced component. (Although it is still a remarkable MW , 160M and 80M directional antenna. Two of the biggest challenges are the physical size of efficient antennas and noise when receiving. My 160M loop is tuned a bit lower than the simulation, it's 543' overall, and tunes at more like 3. I decided to build my own and I went with the Chameleon Antenna as I wanted several mounting options specific to my needs. HFedz Full Wave Delta Loop for 40m HF antenna. 5:1 (a little better in capacitive hat mode) – this is not going to be an effective antenna on 160m however. W6CAW "Fixed" Mobile 160 Meter Whip. 160M & 80M Antenna. If 80-meter current flows in the 160 antenna, it tends to flatten the current loop in the vertical section. Does a tuner help with the 15x15 foot loop-on-ground antenna? Not really with my installation, no perceptible difference was noted, other than lower the swr to allow a transmitter to put most of the power into the dirt. For more information, see the Dipole section. 2 MHz the antenna wire is 32. A full-size Delta Loop, fed in the bottom corner, is a good low angle radiator and is great for working DX. 850 MHz with approximately 350 pf of capacitance. Small Loop Antennas 4 to 7 dB RDF 120º to 150º Beamwidth 8 foot diameter "magnetic" loop 4 dB RDF bi-directional 150 degree beamwidth installed close to the ground to suppress horizontally polarized RFI a specialized antenna for steering a very deep null onto a single ground wave propagated RFI source. 69 – Linear Loaded Sloper Antenna for 160m. 5:1 (a little better in capacitive hat mode) - this is not going to be an effective antenna on 160m however. It's a great aerial for small dwellings and out-door use, easily assembled on scene. 160m Loop Antenna for TX. the vertical portion is 70 feet lenght, completed with 16 radials layed on the ground, match was obtained with an home made Antenna Tuner at the base of the antenna one feet about the ground, this Antenna replaced my previous 160m. If you are wondering what Amateur Radio is about, it's basically a two way radio service where licensed operators throughout the world experiment and communicate with each other on frequencies reserved for license holders. Encouraged by the results I built one for 80m. We immediately thought about simple AM rigs for topband (160m). I have drawn the. I built this antenna last summer as a backup for my yagi and to get on 160 in the city lot. L=468/f(MHz) (so at 14. 136 - Bi-Loop Antenna for 20m. Enter the Chinese made MLA-30 MegaLoop and damnit this is. The W4KDA Loop Skywire “One Antenna to Rule Them All” 40 – 160m have more NVIS On 80m the W4KDA loop has complete coverage of the country with no skip zone. Size 10x10 cm (feeder). 1uF capacitors from the supply line to the collector resistors of the two transistors and 100K resistors to dissipate any static on the loop. A full-size Delta Loop, fed in the bottom corner, is a good low angle radiator and is great for working DX. Antenna efficiency increases with the diameter of the pipe used in both loops. Our antennas work great in Mobile, Home and Portable settings. In the last November Sweepstakes, I worked 276 stations (181on 40M) in 71 sections for 2nd place QRP in the Southeastern Division. Obviously, a loop made of a Slinky coil will not maintain a loop-shape by itself, without support. If you were to scale our 1" tubing model to the 3. 139 - Twisted Loop Antenna for 160m 140 - DX RX Loop Antenna for 160m. The wires rest on the cut out ridges on the four spreader arms. Best to have 2 antennas to compare signals! Devote at least a year to test antenna before giving up on an antenna. 160m and 80m Morgain-Dipole. A friend, WA7YLI, has similar interests. 160m Antenna - Inverted L 160 meters is also the band where the 38 inch diameter magnetic loop antenna (pictured at the left) really shines. Discover (and save!) your own Pins on Pinterest. Here is a photo of W2BRI with his 12 foot square magnetic loop antenna. of #16 "silky" stranded wire cut to one wavelength long on. Random Length Radiator Wire Antenna. The typical "Skin-Effect" seen on higher bands is not so predominant on 160m due to its much lower frequency. The main advantage against the dipole antenna is the use on almost all shortwave bands, excluding the 160m without an antenna tuner. SENTINEL BARRETT 160-6 METER HEXBEAM. It is made from 1 inch (inside diameter), schedule 40, PVC plumbing pipe. The loop's two turns are 6 inches (16CM) apart which hopefully reduces the proximity effect if this was ever to be an issue. The different bands are great for talking to amateur radio operators (hams) at different distances, different times of the day, different seasons and different times during the solar. 160m Linear Loaded Sloper Antenna. This note describes that antenna in some detail. com FREE DELIVERY possible on eligible purchases. with unparalleled success in in antenna that is only 55 feet tall. The Lattin 5 Band Antenna. the loop's height and should be parallel to the loop plane. Reason for sale is I put up a vertical antenna at 40' and am planning on an inverted v 45. The intent of the article is to clarify the use of the loop as an effective gain antenna and explain some of its characteristics and its best characteristics. If it changes, you have RF on the rig/tuner etc. If the angle between radials is not 180 ° like on image, but we shift it to 90 °, impedance will be 50Ω instead of 72Ω and we call that antenna Inverted V. Practical Antenna Handbook - J. Constructing a dipole for 160 meters with a length of approximately 254 feet and a height of 50 feet or higher will produce a low angle of radiation. November 2003 i take off to avoid interaction, the 160 m. Mfj-974hb Balanced Line Antenna Tuner 10-160m 300w + Worldwide Delivery Mfj974hb. of #16 "silky" stranded wire cut to one wavelength long on. There are lots of recommendations for the LDG IT-100 automatic tuner, but there's a 30W limit using it for digital modes, so things like D-Star or (I assume. "When I think back a few years. Encouraged by the results I built one for 80m. We immediately thought about simple AM rigs for topband (160m). Sep 29, 2016 - This Pin was discovered by Ron Camfield. The compactness of the magnetic loop makes it to be a favorite candidate. 9 MHz is 20 ohms, the obvious thing would be to add a 2:1 balun and feed the antenna with 25 ohms. Part of the issue is the requisite inductance of the coil. Controller could have internal optional PCB with 3 BPFs, preamp and protections. 3mm Enameled Magnet Winding Wire. When trying to go portable, having a “perfect” antenna is almost. 160m Top Band End Fed Antenna -G3YEU Coil Details:- 5" (127mm) diameter using 16 SWG bare copper wire. - Jay Terleski, WX0B I often get asked about how to match a ¼ WL vertical to a 50 ohm transmission line and what to do about lightning protection and even how to make RF measurements in the presence of strong AM broadcast RF on the antenna. The calculator yields a reasonable approximation of dimensions, to within 5% over the amateur bands, using typical wire gauges ranging from #12-18 AWG. Receiving antenna's for PA6Z made by PA9M. Where to put the loop was the next big issue to resolve. 5K End Fed Long Wire Antenna / 160-6m / 1500W-max. 8 MHz (160 meters) through 28 MHz (10 meters). On the 160m loop, it would be about 10ft from the end. 03 - Twin-Led Marconi Antenna. AG6IF Talented Balun for build HF Ham radio Sky Loop antenna, 160m 80m & 40-10. The dimension of a loop is less critical if an open line with antenna tuner is used. On 160m band 3S loss agaist dipole in several tens of meters high needs to be expected while this loss has strong dependence on polarization of received signal. This antenna is. radio fun magazine aug93. K5WZ Antennas are a product of RFLABS. ZL-Special Beam Antenna for 15m 41 65. 8 to 40 mHz, and handle powers up to 2 KW PEP (at SWRs of less than 3:1). The first antenna I built was a kite antenna based on the design by Steph VK5ZVS. Listening antennas for Asia and Pacific Needed!. On low angle signals, I am seeing. com FREE DELIVERY possible on eligible purchases. The grounded loop antenna (non-resonant, unbalanced), works well on the HF Bands. Welcome to the home of the Buddipole™, an hf/vhf portable dipole antenna system which is designed to be modular, versatile, and efficient. If one considers all of the above factors, the three loop design shown left, offers the best overall performance. Principally an impedance matching is not necessary. Locating two sets of K9AY Loops roughly 1/2-wave apart offers a classic broadside/endfire arrange-. The 80 meter Delta Loop is mounted in a vertical plane. I choose the Titan DX mainly based on the reviews on eHam. twin turn 1. I’ve just never had the space for a big enough antenna to make it work). The internal tuner of my FT950 tuned this antenna also on the other bands. The base of the Delta Loop is only 10 feet above average ground. What is a Delta Loop • It's a Full wave loop in the shape of a triangle, with sides of 1/3 wave length (this is not critical but it's best to keep as equal as possible). Drake devices were named MN-4, MN-2000, MN-2700. The South end of the antenna is attached to its supporting tree in the same manner as the North end. 160m and 80m Morgain-Dipole Antenna. Tokyo Hamufea 2015 - the BABY Loop. Don’t let H. Adding to the woes at sprint time was an approaching rain front with its attendant noise (that's three strikes). Some time ago, I set out on a quest to try and improve my low band receiving capabilities. Chameleon Antenna has been a pioneer at rethinking and redesigning portable antenna systems since almost a decade! Pushing the limits of design and manufacturing with cutting edge technology, Chameleon Antenna are known to design, manufacture and distribute products worldwide that are versatile, dependable and built to last!. My last antenna was a random wire up 60′ which I loved until it came down, and my yard is such that I really can’t put up a new one until February (when the leaves are gone). 7m AMA 8 Loop to a 20ft marine whip and against predicted data for an optimized 20ft center loaded whip. This omni-directional, multi-band antenna performs well from the lowest frequency band for which it is designed, all the way through 6 meters if your tuner and balun will handle that band. February 9, 2017 Julian OH8STN DIY Antenna Projects, Ham Radio, Magnetic Loop Antenna 4. It is clearly evident that the BOG delivers a much better SNR than the comparison loop and is the reason so many topbanders use a separate antenna for receiving. The shielded loop drives the Rx: view of loading coil and top hat: God save the King ! base insulator, pivots and locking pins The locking pins are drilled at the end to permit the pins to be secured in place with split pins, as the winds rocking motion can cause the pins to displace. We are essentially end-loading a 1/8th wave long dipole when we use a 40 meter full wave loop on 80 meters. Here is a successful 160 Meter short TX loop antenna 4 feet high, 3 feet wide, and 6 inches deep. , and as a good trade-off on both 160 and 80m. Amy(AI6ZU) and I build a magnetic loop antenna for 160 and 80 meter amateur radio. Wound at 3. PA3GZK use the transmitting antenna 4 meter away from the receiving antenna, which is still intact despite sometimes 1 KW transmitter power. Double Extended Zepp Antenna. Drake devices were named MN-4, MN-2000, MN-2700. This loop often delivers the best quality receiving signal, especially if there are plasm TVs operating in the vicinity (see the PIXEL loop page for more details about the performance of this loop on the 160 meter band). RX was a beverage antenna.   The F-LOOP was designed with weight, durability, portability, versatility and cost in mind. The Horizontal Loop, also known as the Loop Skywire Antenna, is an old but very effective design. 160-Meter Dipole Height N0GW - Gary Wescom - 1 Nov 2006 During the current lull in solar activity, operation on the 160 meter ham band has become more popular. AG6IF Talented Balun for build HF Ham radio Sky Loop antenna, 160m 80m & 40-10 $ 81. 160m and 80m without a tuner. On 80m the ZS6BKW is great locally…. 160m Monday, March 3, 2008. Double Extended Zepp Antenna. We decided that topband was too noisy for our simple AM rigs for our intended purpose. CHAMELEON EMCOMM II Antenna Description Chameleon Antenna Emcomm Ii. Because the loop is physically small compared to a full sized 160 meter antenna great care must be taken to decouple the feed-line from the antenna in the balanced versions of these antennas. Magnetic Loop Antennas for The Radio Operator with Limited Space pt. If it changes, you have RF on the rig/tuner etc. 9 MHz is 20 ohms, the obvious thing would be to add a 2:1 balun and feed the antenna with 25 ohms. Sat, 01/16/2010 - 00:49 — riel. This also worked quite well once the loop size became greater than twice the wavelength. ago I had 10 acres to use for my antenna farm. Illustration A is view from above. The loop is resonated at 1. Twenty years ago a friend of mine (W7AE/KY7U) (sk) and myself became interested in low band dxing. The End Wire Size can range from 16 AWG to 12 AWG. A simple test of ground effectiveness is to tune up the antenna and then try to put your hand on top of the tuner while watching the SWR meter. The loop is pretty low and inefficient, but on the air tests confirm the preference for high angle skywave vs. michaels null steerer amp. (It does not calculate inductance, impedance, or even "Q" factor values since it is assumed that. I immediately felt that it was a great product also saw the multitude of schemes and research carried out by Chevdar. 65 - Inverted-V Beam Antenna for 30m. below is a 2. This antenna configuration produces a high angle of radiation, consists of a loading coil in each leg resulting in n. I have operated on 160m for around 40 years and most success was using a 87ft top loaded vertical with a 25 ft capacity hat and 50 1/4 wave ground radials. I seem to remember 6-12 inches. The challenge was design the lightest possible antenna for a handheld operation on the lower bands. 50ft Rg8x Coax UHF (Pl259) Male/male 50 Ohm Antenna Cable. 94 KB: After reading about how good horizontal loops are for WSPR RXing, well, I put one up. compressed delta loop apex 123 foot high, vertical feed, I had non very good result with the shunt feed tower, we are here in a poor conductivity groud area and also I could not put many radials as a should I wish due to lack of room, this 160 m. points of note. This is a 28. Antenna Loading Coil Calculation The calculation method is taken from a BASIC program which I got many years ago from OA4/KA2OIG who is hereby gratefully acknowledged. Note the low angle of radiation. Delta loop antennas are some of the best performing wire antennas and have the advantage that they can be easily supported via a single elevated mounting point such as a mast or a tall tree. By experimenting with my S-Match antenna tuner I found this way («fig) of winding a balun. 4:1 Baluns are useful between balanced lines for center fed Zepps, Off-center fed (OCF) dipoles with coax, G5RV antennas, full wave loops, NVIS dipoles that are close to ground and have impedance levels near 200 ohms or high impedance feeds for log periodic beams. 160m Linear Loaded Sloper Antenna. I played with cutting the coax to the right length and finally decided against…. 7 MHz 1/1 wave antenna. The current Inverted V with its high angle of radiation works very well within the Midwest and serves me well for evening rag chew sessions with the surrounding states. A practical 160m antenna. 20m, 17m, 15m, 12m, 10m, fed by a second coax. 40m - 80m - 160m Short Dipole Antenna. 160m-10m broad band element fed by a third coax. Welcome to RadioWavZ Antenna Company • Home of the worlds first 160-6 Meter Hexbeam. To avoid this problem, locate the K9AY Loop as far from the transmitting antenna as possible. 160m-2200m receiving antenna The March 2015 QST article on a loop receiving antenna by DK6ED set me to thinking about a much larger version for 2200m and up. Bazooka Balun Dipole. An antenna is a device to transmit and/or receive electromagnetic waves. 04 - Swallow-Tail Antenna. (And all my responsibility is hereby disclaimed!) I haven't personally tested these designs, but others have and found them to be satisfactory. Like in the $250 or higher range. Small Coaxial Loop tuned for specific band. Plans and pictures of 80m and 160m antennas, both for transmission and reception built by EI7BA A Small Wire Loop Antennas for 160 meters Low noise, receive only coax loop antennas for 160 - 10 meters HF bands Roofspace Antennas How to build a roofspace antennas and get them to work. 31 feet for midband 17 meters. Formula for length of full wave loop The formula for a calculating the length of a full wave loop antenna is: Length (feet) = 1005/f MHz. 139 - Twisted Loop Antenna for 160m. Enter the Frequency in MHz. The loop was about 5 m above the ground and I used a tuner to match the antenna. An All Band 80 Meter Loop Project. Ferrite Sleeve Loop. Listening antennas for Asia and Pacific Needed!. (And all my responsibility is hereby disclaimed!) I haven't personally tested these designs, but others have and found them to be satisfactory. It will provide excellent short range communications and is easy to set up for emergency or temporary communications. Amateur Radio Techniques - P. Construction details and measurements are for Registered Users only. 1m 40m loop - magnetic loop antenna 40 to 160m Stay safe and healthy. A Very Simple Broadband Receive Loop for the Broadcast Band and HF Spectrum - W1AEX Over the years, my location has been fairly quiet across the RF spectrum, but like most places, it has its moments. Getting a Big DX Signal on 160-10 m from One Small, Low Antenna Chuck Counselman, W1HIS I live on a small lot in a dense, inner suburb of Boston and Cambridge. The loop was about 5 m above the ground and I used a tuner to match the antenna. 67 – Half-Sloper Antenna for 160m. Receiving antenna for low bands K9AY loop antenna installed at PA6Z Contest group. This website may use third party cookies. As it turns out, building a 160m loop antenna with a total circumference of λ/3, even within the restricted space of a residential yard, is not difficult at all. In relation to a given frequency and current distribution, if loop length were greater than lambda/4, you'd theoretically need less capacitance to obtain resonance but your loop would stop performing as a "magnetic" antenna. Tie the fishing cord to the loops. 1m dia and is heard in the USA s9 when band is dead!!do that with your g5rv!! magnetic loop 40m 80m 160m antennas. 147 - KE4PT OCEF All-Band Dipole. The sloper's feed point is anchored high above ground near the top of the tower on which sits a grounded HF yagi beam antenna. 160m Monday, March 3, 2008. I used it to build 1) 1/4 wave vertical antenna for 40m and 20m 2) A delta loop for 40m and 20m 3) EFHW antennas for 80m, 40m, 20m and 15m 4) A magnetic loop for 40m thru 20m. Dual-Band Sloper Antenna 39 63. 6m high and 1/13 of a wavelength long on 160m! I read the net information about loop builders experiences. Details about AG6IF Talented Balun for build HF Ham radio Sky Loop antenna, 160m 80m & 40-10. 160m Half-Sloper Antenna. michaels null steerer amp. If you look closely, you can see the screw in the. The reason is I believe both are made by the same company, both use most of the same components and also the drawing of the loop antenna in my AN-100 "instruction manual" is the AN-200. On 80m the ZS6BKW is great locally…. 5 MHz and below are a special case. 3 element wire beam SE. November 2003 i take off to avoid interaction, the 160 m. Background. Here's a real cheap antenna to make from 160m - 6m and it WORKS! Preamble It was developed simply because of my. 160m Twisted Loop Antenna. Remember, the ideal loop is a perfect circle - it's not too hard to make an 8-sided loop for 20 meters using PVC pipe and some dacron rope to hold it rigid. The current Inverted V with its high angle of radiation works very well within the Midwest and serves me well for evening rag chew sessions with the surrounding states. At the heart of every radio and MLA (Magnetic Loop Antenna) is the resonant circuit. The noise floor at both our locations is very high on 160m. The build utilises the DIY Magnetic Loop Starter Kit from Chamaeleon Antenna. Half Delta Loop Antenna. LOOP SKYWIRE ANTENNA CONSTRUCTION The Loop Skywire Antenna, is a very effective design for DX. 160 m loop on 80, 80 m loop on 40, 20 m loop on 10, etc. HFedz Delta Loop for 20m HF antenna (200W) Ham Radio Antenna. (And all my responsibility is hereby disclaimed!) I haven't personally tested these designs, but others have and found them to be satisfactory. The conductor width isn't of great importance in the design. Simple 2m loop RX Antenna; About Me. It is especially designed to reduce sensitivity at MF and LF (MW) to prevent the receiver overload from multiples high power AM broadcast in city areas. Hello Operators. Helical antennas invented by John Kraus give a circular polarized wave. 160m Loop Antenna for TX. 5 thoughts on “ A review of the W4OP portable magnetic loop antenna ” John April 6, 2020 at 4:20 pm. For that article, I bought the very popular AlexLoop "WalkHam" antenna. DXF, or Inkscape. 2 Double-Extended Zepps at 170 feet. 160M & 80M Antenna. T he purpose of the calculator is to give you a quick overview of the feasibility of "squeezing" a loop into your available yard or apartment space. 9 MHz Full-Wave Loop Antenna. twin turn 1. 160m Half-Sloper Antenna. Antenna wire can be #14 hard-drawn antenna wire. Include schematics and info on a building the control box, preamplifier and low-pass filter A Lowband Antenna that is Almost Free. You must be aware that this antenna is a high "Q" device and as a result has a very narrow bandwidth of about 30 to 40 khz. 66 – ZL-Special Beam Antenna for 15m. Experiments with 160m antennas I planned to join a 160m SOTA summit-to-summit attempt in April 2017 and so obviously needed a 160m capable antenna that could be carried to the top of a mountain – not so easy at that wavelength. - - Photo courtesy of N4IS - - Waller Flag Common Mode Chokes by N4IS (. The effective diameter is approximately 5 feet. Fold the RG-59 in half. Cheap M Antenna. If you are wondering what Amateur Radio is about, it's basically a two way radio service where licensed operators throughout the world experiment and communicate with each other on frequencies reserved for license holders. The Delta Loop is not only a great transmitting antenna but a low noise receiving antenna. 160m/80m Broadband Antenna by K5GP A presentation to CTDXCC September 22, 2008 The 160m/80m broadband antenna design objectives were to have: 160 and 80 m antennas since I had no antennas for these bands, the antennas had to be hidden because of covenant restrictions, open wire feeders would be too visible to be allowed,. • For best results, the lengths of the 3 sides should be approximately equal • The resistive impedance is ~130 interface with 4:1 BALUN • 2:1 VSWR Bandwidth Covers whole band at 40M and up (~ 4 % of Freq). Antenna tuners are valuable tools for many applications, but if you’re looking for a well-matched antenna system, there are other choices that may better suit your needs. 40m 4 square antenna (4 directions Comtek) 30m 4 square antenna 5x5 m elevated deck (not a radio project for a change) On-going: All Bands, bandpass filter unit, SO2R or Dxpedition use, 160-10m 200W, MW reject filter, LNA Beverage Amp with multiple rx outputs. below is a 2. Searching for affordable Antenna Sdr in Consumer Electronics, TV Antenna, Antenna, Computer & Office? Buy high quality and affordable Antenna Sdr via sales. Note the low angle of radiation. The Vertical Delta Loop • A three sided loop is known as a Vertical Delta loop sitting on the ground. • For best results, the lengths of the 3 sides should be approximately equal • The resistive impedance is ~130 interface with 4:1 BALUN • 2:1 VSWR Bandwidth Covers whole band at 40M and up (~ 4 % of Freq). Dec 19, 2016 - MF Loop antenna - Loop antenna - Simple English Wikipedia, the free encyclopedia. In reflection, I'm very glad to have added the 160m operation as that is a fascinating band. Unfollow loop antennas to stop getting updates on your eBay Feed. 1/4 wave elevated feed vertical. 5 MHz frequency, you would need a 12 foot diameter loop and a 215 pF capacitor to achieve a 40% radiation efficiency. Delta Loop Antenna. A loop’s perimeter, in this case the sum of both perimeters, determines the antenna’s inductance. Before getting on 80m though, I built my phase-one 40m loop which worked great and I was happy on 40, 20, 15 and 10m. A full size loop exhibits a feed point impedance of approximately 100 to 200 ohms. Mounted atop a Scorpion 680, the antenna can be tuned from 80 through 17 meters. I found that with a proper pre-amp, such the Palomar series, or Ameco's PT-3 there was a significant lowering of noise, but the signals that I was unable to hear on my sloper now were quite workable using the. Nocturnal transmitting with the 80 & 160m coaxial magnetic loop Yesterday we featured a magnetic loop, made from 15m of coaxial cable, that worked on 80 and 160 metres. February 9, 2017 Julian OH8STN DIY Antenna Projects, Ham Radio, Magnetic Loop Antenna 4. docx from ECE UE16EC303 at PES Institute of Technology & Management. 160m (1800-2000 kHz) Dipole, Inverted V and Delta Loop. Small Loop AM Antenna ; Get Antenna Building Guide Book. The larger the wire, the wider the bandwidth. The feedpoint impedance of a full-wave loop in free space is aproximately 100-120 Ω with a gain over a dipole of 1. The Double Half Delta Loop (DHDL) was developed by George, AA7JV for his Lowband Expedition to Chesterfield (TX3A). My original plan was to make it a fixed capacitor out of a length of coax for a single 40m frequency. The VSWR is under 2:1 over the DX part of the ‘phone band. So hacker of note and dedicated amateur radio operator [Jeri Ellsworth (AI6TK)] has started a video series devoted to building a magnetic loop antenna for the 160- and 80-meter bands. 141 - Hentenna 3dB-Gain for 10m, 6m, 2m. Getting on 160 Meters on a Budget ___The smallest successful , easy to build 160M antenna I've built is a 3/8 wave loop. It is especially designed to reduce sensitivity at MF and LF (MW) to prevent the receiver overload from multiples high power AM broadcast in city areas. Before you say this couldn't possibly work, then have a look at this 39 second-long video of a UK long wave commercial radio transmission being received by one of my sloper antennas (hint, it's the weaker signal by far), and the ground loop antenna:. I made 119 Qs in 35 sections in the 160M contest, but that was not as a loop, rather a vertical, top loaded. I don't think that I can convey in words my disbelief as I logged my first signal reports on the 160m net with this antenna. Some call it a Skywire Loop Antenna, some call it a W0MHS Loop Skywire Antenna, nowadays it's called a Full Wave Loop Antenna but it still is a force to be reckoned with. We immediately thought about simple AM rigs for topband (160m). Amateur radio has 10 HF (shortwave) bands, from 1. Twenty years ago a friend of mine (W7AE/KY7U) (sk) and myself became interested in low band dxing. 73 de K5WZ. EWE antenna This is the "original" version of the antenna, as developped by Floyd Koontz, WA2WVL. points of note. It is especially designed to reduce sensitivity at MF and LF (MW) to prevent the receiver overload from multiples high power AM broadcast in city areas. July 19, 2014September 17, 2014 Vertical Delta Loops 99 The Vertical Delta Loop • A three sided loop is known as a Vertical Delta loop sitting on the ground. 160m-10m broad band element fed by a third coax. 8/ago/2016 - DX Engineering 160m THUNDERBOLT™ Vertical Antennas 160VA-1 ‹ SPARKY's Blog. 5:1 (a little better in capacitive hat mode) - this is not going to be an effective antenna on 160m however. For the 160m loop To construct the 160m loop you'll need 20ft on RG-59. MINI LOOP ANTENNA 80m - 160m mini loop antenna and details of the corner of the loop. -----End notes. You are looking at a AG6IF Talented Balun. My first magnetic loop for transmitting was the AlexLoop which was a great antenna. Some time ago, I set out on a quest to try and improve my low band receiving capabilities. On 160m band 3S loss agaist dipole in several tens of meters high needs to be expected while this loss has strong dependence on polarization of received signal. On the 160m band both modes are similar, the ATU can tune the antenna down to about 1. On 160m I got to 1:4 SWR, intuitively it feels like changing…. PA3GZK did the test with a Kenwood TS-480 tuned to the 80 meter band and the noise signal. magnetic loop antenna 40 to 160m. I surmise that my loop's local environment is having effects over the theoretical radiation plots. Well, its time to have a look at the first prototype. , 34601 or [email protected] To support an antenna, I have no tower, and only two trees that aren’t too close to a house. Amateur radio has 10 HF (shortwave) bands, from 1. Mounted atop a Scorpion 680, the antenna can be tuned from 80 through 17 meters. The hardware designs are released under the. Small Loop Antennas 4 to 7 dB RDF 120º to 150º Beamwidth 8 foot diameter "magnetic" loop 4 dB RDF bi-directional 150 degree beamwidth installed close to the ground to suppress horizontally polarized RFI a specialized antenna for steering a very deep null onto a single ground wave propagated RFI source. A Multiband loop. Last few weekends I have been putting up a horizontal loop, " sky wire", about 70m long. 8/ago/2016 - DX Engineering 160m THUNDERBOLT™ Vertical Antennas 160VA-1 ‹ SPARKY's Blog. An 80m loop should not tune at all to 160m I think, so I think the loop is ok for 80m and up. of #16 "silky" stranded wire cut to one wavelength long on. 137 - Wire Beam 6dBd-Gain for 10m. Wire-Beam Antenna for 80m 38 62. com or Bus Phone#: (352) 232-0281 or Home Phone#: (352) 797-6062 or FAX # (352) 797-6062 WE MANUFACTURE AND SELL THE DURABLE K4TR LINE OF ANTENNA'S AND ACCESSORIES AT AFFORDABLE PRICES. This antenna is designed for stations having a difficult time putting a decent signal on 160M from small or CC&R'd lots. Setting up our 160m Transmit Antenna was the first order business for the Wire Antenna Team at Winter Field Day. Small Loop AM Antenna ; Get Antenna Building Guide Book. Hello Operators. This link is listed in our web site directory since Tuesday Jul 7 2009, and till today "160m Delta Loop Antenna" has been followed for a total of 4775 times. Ham Radio Antenna Wifi Antenna Long Range Tv Antenna Hf Radio Surveillance Equipment Dvb T2 Quad Coding 3d Printing Hybrid Double Quad Antenna 2m 2/HDQ5 HYBRID DOUBLE QUAD ANTENNA 2M Double quad antenna amateurradio 2m Antenna for Amateurradio, Hamradio 2m-band VHF (frequency 144. Base & Portable HF 100 Watt Magnetic Loop Antenna; Base Portable HF J-Pole Alpha Antenna; Mobile HF Alpha MOTO Antenna; 5 Element LPDA Beam VHF UHF Cell WiFi Jamming Antenna $ 499. Diamond’s new CP5H is a five band (40M, 20M, 15M, 10M and 6M) trap vertical antenna with trap radials. How to make mobile/portable whips. Introducing our newest addition to our Portable Power line of products -- the PowerMini!. The goals of the project were to provide an optimized antenna for 40m, 80m, 20m, and all other HF ham bands, in that order of priority. Well a good 160m antenna depends on how much room you have on your property. The Mystery Antenna, on the other hand, presents a six-lobe pattern on 20 meters, gain broadside to the antenna, and also low feed point impedance to simplify matching the antenna to the rig. The internal tuner of my FT950 tuned this antenna also on the other bands. This antenna is small, operates well when mounted at ground level, and exhibits performance that competes with almost any HF antenna except a multi-element beam at a wavelength or more above ground. PVC sections bolted together, and 1/2 wavelength of antenna wire helically wound around the PVC sections. The cable braid is opened at the top of the loop. Searching for affordable Antenna Sdr in Consumer Electronics, TV Antenna, Antenna, Computer & Office? Buy high quality and affordable Antenna Sdr via sales. If you are wondering what Amateur Radio is about, it's basically a two way radio service where licensed operators throughout the world experiment and communicate with each other on frequencies reserved for license holders. If it's more local contacts you want, then a good dipole or a loop is hard to beat. The main category is Antenna for 160 meters band that is about 160 meters band antenna. If I can also get good results on 160m that is a massive bonus (I know that there isn’t much SOTA activity on 160m but I’ve always wanted to play on 160m. 10m -160m Multiband “Z” Antenna. Unfortunately I can't have full sized 80m antennas on my present city location so I have been experimenting with loops and found them to be very good Rx antennas. 160m-10m broad band element fed by a third coax. Best to have 2 antennas to compare signals! Devote at least a year to test antenna before giving up on an antenna. Welcome to RadioWavZ Antenna Company • Home of the worlds first 160-6 Meter Hexbeam. 31 feet for midband 17 meters. Fractal reduced size magnetic loop antenna Reduced size 3 times than conventional magnetic loop (size 1. Full-wave loop antennas can be large at lower frequencies, but they are quieter than dipoles and have more gain broadside to the plane of the loop. References: Antenna Toolkit - J. 160m, 80m, 40m Curtain Zepp Antenna. Recommended antenna tuner for IC-7100 I'm looking for a decent antenna tuner for an IC-7100 (100W model) that won't break the bank, but that will let me use full power on HF digital modes. 5 thoughts on " A review of the W4OP portable magnetic loop antenna " John April 6, 2020 at 4:20 pm. on Antenna Tuner Basics. antennas ?" It is hard to believe twenty years have gone by, but to answer the question. 40m Delta Loop Antenna Several members of the Nashua Area Radio Club recently got together to help one of our members to put up a 40m Delta Loop antenna. Loop Antenna : Resonant Loop Antennas. A neighbor just north of me, W8FPU (Parker) was actually working a couple of VK's on 160-meters, something very rare at the time. Magnetic loop antenna MLA-T (Magnetic Loop Antenna Top Bands) is operation with power up to 100W and designed mainly for portable use on 160m, 80m and 40m bands. 160M antenna for small lots or gardens. The ferrite rod antenna can be considered as a very small loop antenna. 160m/80m Broadband Antenna by K5GP A presentation to CTDXCC September 22, 2008 The 160m/80m broadband antenna design objectives were to have: 160 and 80 m antennas since I had no antennas for these bands, the antennas had to be hidden because of covenant restrictions, open wire feeders would be too visible to be allowed,. Reason for sale is I put up a vertical antenna at 40' and am planning on an inverted v 45. Antenna Loop, Verona, Italia, VHF. l Current Balunkeeps RF off the shield of the coax – this is a good thing. The BABY loop at TOKYO Hamufea 2015 the first day, had been parked near the smoking area at the back hall, Hammer with a loop antenna. 03 - Twin-Led Marconi Antenna. References: Antenna Toolkit - J. An ideal combination for portable use. Although this online calculator is intended to assist with designing and building homemade, ham radio loop antennas for use in the HF bands, magnetic antennas have been. The Square Pole. 160m) The W3EDP HF antenna. A great review of a ham Radio aerial that I have used many times. Yagi Beams & Dipoles. FOUR/ FIVE TURN 1m LOOP ANTENNA FOR 80m (and 160m) I have been Rx on 80m with home made Direct Conversion recievers since 1980's. A bit of modeling with EZNEC[2] was very encouraging so I built and tested an antenna. 40m, fed buy a separate coax. An Introduction to Operating on 160m Carl Luetzelschwab K9LA [email protected] It will provide excellent short range communications and is easy to set up for emergency or temporary communications. This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. ) 160m full wave loop, at heights ranging from 15 to 80 feet in a rectangle shape, with the broad sides facing east and west, fed with 300 ohm ladder line, feed point at about a 20 to 30 foot height. Matching of 110–100 Ω to 50 Ω is possible with a balun. In the last November Sweepstakes, I worked 276 stations (181on 40M) in 71 sections for 2nd place QRP in the Southeastern Division. 13 thoughts on “ Top Band Magic: The Inverted L on 160M ” LodeRunner An ‘Inverted-L’ antenna for 160 is a workable solution for NVIS coverage at the 100-watt power level, so long as the vertical portion of the wire is not more than 50 feet in height (assuming the total wire length is >= 1/4 wavelength). A great review of a ham Radio aerial that I have used many times. 500W SSB, 200W FM. I saw a large loop by VK2ASU that had switchable turns which allow more coverage, that might be a good next step. An antenna must be tuned (matched) to the same frequency band as the radio system to which it is connected. This Cobweb Antenna is using a double 1:4 balun that can handle a. Well, its time to have a look at the first prototype. Leigh - VK5KLT was responding to the data I had sent him on the measured bandwidth and Q values of this loop in its final operating position and as to why the Q and bandwidth on 40m and the Q, bandwidth and efficiency on 160m are so different to conventional calculation predictions. Only the kindness of my next-door neighbors (who let me use one of their trees for the antenna) kept me on the air. The measurements below are for building a Double Bazooka Near Vertical Incident Skywave (NVIS) Antenna. 000 MHz - 146. Helical antennas invented by John Kraus give a circular polarized wave. One option is to build a resonant antenna to match the frequencies you plan to use. Hello Operators. pdf 381KB download) Rotaries- Flag vs. How to build an Inverted L for the low-bands (40m, 80m and 160m) An inverted L is just like a vertical apart from the fact that instead of going straight up (like a tuned quarter-wave), it turns 90 degrees somewhere. An All Band 80 Meter Loop Project. 8m diameter: Magnetic Loop Projects, EA5XQ Ho voluto provare un'antenna per la sola ricezione. They are one of the easiest to design. Initially I had considered putting it in the attic - but that space is already past it's limit of antenna complications with the current antennas. 00 HF Ham radio Sky Loop 80 40 20 15 and 10 meters and 2. I have found that a loop 15' per side is enough to cover 160m through 20m very comfortably from my QTH. Suburban antenna for 160m. Helical antennas invented by John Kraus give a circular polarized wave. 38m) horizontal loop? I am thinking of trying out an 80 foot horizontal loop antenna at near grass-level on field day. And how to make one! By Chris, G0DWV. This loop is 3. Getting on 160 Meters on a Budget ___The smallest successful , easy to build 160M antenna I've built is a 3/8 wave loop. On the 160m band both modes are similar, the ATU can tune the antenna down to about 1. Recommended antenna tuner for IC-7100 I'm looking for a decent antenna tuner for an IC-7100 (100W model) that won't break the bank, but that will let me use full power on HF digital modes. Clothesline Antenna. And, as noted, the skywire loop can be a fine, fine multi-band antenna that actually has impressive gain as you make it bigger or use it on higher and higher frequencies. I Q, every effort must be made to minimize losses. #N#WiKi loop design. com FREE DELIVERY possible on eligible purchases. 160m Inverted Delta Loop. ie 40m loop is 1. If you are. The Delta Loop (Skywire) Antenna Legends, Theory and Reality. A ground loop antenna for 160m. Welcome to the home of the Buddipole™, an hf/vhf portable dipole antenna system which is designed to be modular, versatile, and efficient. Loop Systems MLA-T PRO Top Band QRP Magnetic Loop Antenna, The MLA-T is a magnetic portable antenna for 160m, 80m and 40m. What attracted my attention was the good pattern off the back of the antenna and the simplicity of the phasing scheme which might allow the antenna work over a wide bandwidth, i. Formula for length of full wave loop The formula for a calculating the length of a full wave loop antenna is: Length (feet) = 1005/f MHz. The Matching Section is 450 Ohm Open Wire Feedline and is a compromise impedance between the 5/8 Wave antenna elements and the feed point, A 4:1 Current Balun. The vertical antenna is specifically designed to operate on 160 meters. 160m preamplifier. A capacitance hat is on top, and the antenna is fed with a 50. The Delta Loop is a very popular antenna on the HF bands and can be used with success at the lower VHF bands as well. com in 2 categories. 160m Antenna - Inverted L 160 meters is also the band where the 38 inch diameter magnetic loop antenna (pictured at the left) really shines. The principle of the Multi-band Mono Delta Loop This ingeniously designed single wire loop antenna works in 4 amateur bands in a delta shaped configuration (hence I called it a multi-band mono delta loop). MFJ-2990 HF 160m-6m Vertical antenna, 43ft Tall, Handles 1500W Max. To avoid this problem, locate the K9AY Loop as far from the transmitting antenna as possible. Presented at Pacificon, Oct 17, 2008 Design optimization and applications, Topics • Small, square so-called "shielded" receiving loops for 160m and 80m. 160m Monday, March 3, 2008. Magnetic Loop Antennas on 3. After many hours of research, modelling and experimentation we discovered that the use of horizontal triangular loops would provide us with the antenna we needed. Full Size Mega Loop Antenna 6 to 160m. 3 average based on 3 product ratings. A few years back, I happened across wiring from a well replacement, heavy three strand copper coated with some waxy stuff. Small Coaxial Loop tuned for specific band. #N#WiKi loop design. Si tratta di un loop magnetico quadrato, di 152 cm di lato, che ho costruito seguendo le indicazioni di KC2TX: Magnetic loop with capacitive load for 30-10M. ortesis de tobillo y pie articulacion rehabilitacion movimiento terapia salud,AG6IF Talented Balun for build HF Ham radio Sky Loop antenna, 160m 80m & 40-10,THE LARGE HAGENAUER CANOE WITH 4 STANDING WARRIORS VIENNA AUSTRIA C. garage or in the field anywhere I wanted. To keep 160m RF out of the meter lamps, connect a 0. Last month I published the teaser video for the Ultimate Man Portable Magnetic Loop antenna build. MFJ 1778 G5RV 10-160 Meters Wire Antenna,10 - 80 Meters As Dipole 160 As Marconi. This is an easy antenna to build and the materials cost about $15-20. loop antenna. There is a general lack of measured data comparing small transmitting loop antennas to some sort of standard antenna. Forgot to add it worked on 10m-40m at full 100 watts. 136 - Bi-Loop Antenna for 20m. W2AU’s operate at a low VSWR from 1. 5 to 6 dB improvement as measured on 40m by Rudy Severns N6LF. The challenge was design the lightest possible antenna for a handheld operation on the lower bands. Most radio signals within several hundred miles tend to arrive at much higher wave angles (above 45 degrees), and at those angles, the loop response is nearly omnidirectional. 73 Nick VE7DXR At 08:57 2020-05-04, Chris Moulding wrote: >I've developed a High Z Antenna Amplifier for 160m and other HF use >as previously mentioned on the list. Loop antenna feed question (too old to reply) John Lawson 2007-05-13 13:27:40 UTC. 5 out of 5 stars 13 $46. November 2003 i take off to avoid interaction, the 160 m. 160m Sunday, December 13, 2009 TX3A Double half delta Loop (to Africa) December 09 Details of this Antenna can be found here TX3A Double half delta Loop (to. Description My loop is 160m in circumference. 05 - Random Length Radiator Wire Antenna. , and as a good trade-off on both 160 and 80m. The Vertical Delta Loop • A three sided loop is known as a Vertical Delta loop sitting on the ground. Presented at Pacificon, Oct 17, 2008 receiving loops for 160m and 80m. My first antenna, a fan dipole at 34 feet in the middle and about 20 to 25 feet on either end, provided me a system to compare the ProMaster Sr to. 40m - 80m - 160m Short Dipole Antenna. At the heart of every radio and MLA (Magnetic Loop Antenna) is the resonant circuit. WSPR spots created with 25Watts RF into this antenna on 160m band at over 2000km distance. phasing scheme which might allow the antenna work from 100 kHz to 2 MHz if it could be made large enough to have sufficient received signal on 2200m but still be small enough to behave like a "small" loop on 160m. the vertical portion is 70 feet lenght, completed with 16 radials layed on the ground, match was obtained with an home made Antenna Tuner at the base of the antenna one feet about the ground, this Antenna replaced my previous 160m. I seem to remember 6-12 inches. 160M antenna for small lots or gardens. With the MFJ-269 meter my motto is build, test, cut, test. Wanted: magnetic loop for the 40-80 160 meter band with real power Calculation, design and preliminary tests of the tuning system (Ron, PA2ION) SUMMARY Living in an urban area often demands for extra challenges for antenna design for 'lower' HF bands. Today I brought in a 600 ohm ladder line from the loop to the radio, and I was able to tune all HF-bands 80m through 10m. Once the wires are cut and the Balun build, it takes less than 20 minutes to deploy the antenna. 160m not so much unless the band is really in good shape…but better than no antenna at all on 160m. My main antenna for 160m is an inverted ‘L’ with a fair earth system, but it’s a noisy receiving antenna. KIT - all parts + PCB + box. AB0X Roof Loop 2. l Current Balunkeeps RF off the shield of the coax – this is a good thing. I made 119 Qs in 35 sections in the 160M contest, but that was not as a loop, rather a vertical, top loaded. Helical antennas invented by John Kraus give a circular polarized wave. Most old timers or skilled antenna builders will tell you there is $60 worth of parts in the $250 antenna and that you should just hunker down, get smart, and build one yourself. Maximize your signal and minimize noise with antenna accessories such as antenna switches, vertical add-on kits, variable phasing controllers, baluns, radial. What is a magnetic loop antenna ? In a few words the ALA 1530 is a compact HF antenna constituted of an aluminium sheated loop of 93 cm of diameter. This is for hams who have perhaps 250-300 feet (assuming a 160M antenna) along the back or side of their property. Dual-Band Sloper Antenna 39 63. 5 MHz and below are a special case. Fold the RG-59 in half. 222 results for loop antennas Save loop antennas to get e-mail alerts and updates on your eBay Feed. Com W0QH 2018-12-26T15:58:23-06:00. Connect the feedline to your tuner, and get on the air. A Small Wire Loop Antennas for 160 meters Low noise, receive only coax. with unparalleled success in in antenna that is only 55 feet tall. 40m - 80m - 160m Short Dipole Antenna. For the 160m loop To construct the 160m loop you'll need 20ft on RG-59. The calculator yields a reasonable approximation of dimensions, to within 5% over the amateur bands, using typical wire gauges ranging from #12-18 AWG. In the meantime, I thought I’d go back to a vertical. 160m Loop Antenna for TX. 160m | 160mm to inches | 160mg | 160m contest | 160m antenna | 160m transceiver | 160mm to feet | 160m to ft | 160mm into cm | 160m vertical antenna | 160mw | 1. 22 Different Wire Antennas for the 160 Meter Band We have 339 guests and no members online. The Delta Loop Antenna…. Shunt Feed Tower I'm using till 1999 to make place to an one el. 139 - Twisted Loop Antenna for 160m. Please refer to attached pictures of the antenna site… The antenna is very directive for vertical polarized local signals, so I can notch out the heavy power pulse noise of the wind energy farm very very close. I planned to join a 160m SOTA summit-to-summit attempt in April 2017 and so obviously needed a 160m capable antenna that could be carried to the top of a mountain - not so easy at that wavelength. View and download the Shield Schematic and PCB Kicad/Eagle CAD files, LibreCAD. Center Dipole Fed Off 6M model antenna and 20M, 40-6LPOCFD 40M, for 10M, 10M, 40-6LPOCFD for 40M, Center antenna and model Dipole 20M, Off Fed 6M. But the calculated efficiencies were so low I never attempted to use one. In relation to a given frequency and current distribution, if loop length were greater than lambda/4, you'd theoretically need less capacitance to obtain resonance but your loop would stop performing as a "magnetic" antenna. A Practical Antenna for 160 Metres This aerial is one I have used for top band (160 metres) - it was suggested to me by Alan G4ERZ, also of Hull. KM4UDX Unique WSPR RX Spots by Day With 160m sky loop antenna: 41. restrictions keep you off the air!. There are two different types of loop antennas, one is the ferrite bar (as in your am. Cheap impedance tester, Buy Quality impedance meter impedance measure SARK100HF ANT SWR Antenna Analyzer Meter 1-60MHz Standing Wave Tester for Ham Radio Hobbyists Impedance Capacitance Measurement Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return. THE WALL OF SHAME. It is especially designed to reduce sensitivity at MF and LF (MW) to prevent the receiver overload from multiples high power AM broadcast in city areas. The conductor width isn't of great importance in the design. KIT - all parts + PCB + box. The purpose of this. his version of a double loop antenna. 40 meter Delta Loop Joe on 21st Oct 2016 I recently purchase a 40 meter Delta Loop from Chris and received the antenna few days later after the purchase, I hung up the antenna in less than one hour in configuration, C , I hook up my antenna analyzer after the installation and I was Very surprise is flat 1:1 on the entire 40 meter band, 20 meter was about 1:2 on the top edge of the band and the. Paperback on Amazon, Kindle Book, or in PDF. : 160 M Tower. View and download the Shield Schematic and PCB Kicad/Eagle CAD files, LibreCAD. 50ft Rg8x Coax UHF (Pl259) Male/male 50 Ohm Antenna Cable. Any suggestions/ feedback welcome! vy 73 de Marcus KD0JKM Update 2012-06-22:. Helical antennas invented by John Kraus give a circular polarized wave. And how to make one! By Chris, G0DWV. The VSWR is under 2:1 over the DX part of the ‘phone band. I have operated on 160m for around 40 years and most success was using a 87ft top loaded vertical with a 25 ft capacity hat and 50 1/4 wave ground radials. I worked all 50 states and several countries with 100 Watts using the antenna on the 160 meter band. How to build an Inverted L for the low-bands (40m, 80m and 160m) An inverted L is just like a vertical apart from the fact that instead of going straight up (like a tuned quarter-wave), it turns 90 degrees somewhere. compressed delta loop apex 123 foot high, vertical feed, I had non very good result with the shunt feed tower, we are here in a poor conductivity groud area and also I could not put many radials as a should I wish due to lack of room, this 160 m. You must be aware that this antenna is a high "Q" device and as a result has a very narrow bandwidth of about 30 to 40 khz.