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80 meter loop antenna

80 meter loop antenna

• 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) Opened for inspection, these two entry-level Chinese 80-meter ARDF sets have similar direct-conversion circuits. Reflector|Director: 297. This Horse Fence antenna is the Best money I ever spent in Ham Radio gear in over 40 years as a Ham! If you want the very best antenna money can buy in this type of antenna, this is the one for you! I bust pileups every day even without an amplifier and hear signals the guys with the expensive beans wish they could hear! Terminated Folded Dipole Antenna System: 10 Meters through 160 Meters commercial-grade performance, heavy duty construction, and top-notch customer service. All you need to do is enter the desired resonant (center) frequency in the form below, then click "Calculate". I decided to build a 80 meter, half wave wire antenna that takes full advantage of the phone portion of the band known as 75 meters, also this antenna will not need a tuner. With A Low Cost Loop Antenna By . 85 would be about 261 feet long. The second area in which a long wire loop offers advantages is in azimuthal coverage. Click Here to see more on transmitting Loop Antennas from AA5TB Loop Skywire (average height of about 35 feet) 80/40 Loaded Dipole (inverted V, center at 21 feet, ends at 5 feet) 80/40 Resonant End Fed (sloper, loaded end at 25 feet, feedpoint at 3 feet) Test Procedure. This guide should offer an example of how a delta loop could be set up, I hope this information is useful. Skywire Loop Antenna-- From The ARRL Verticals 80 Meter Antennas Antenna Projects From The YCCC-- Double-L For 80/160, Two Wire Beverage, A Poor Man's 160 Meter 4-Square, Using a 4 square Vertical Phased Array to improve your 80 and 160 meter signal, -- From The Yankee Clipper Contest Club An 80 meter dipole would be about 134 feet long. 829 meter diameter magnetic loop for 80 and 160 meters. Below is one example of how to mount a 20 metre delta loop  5 Aug 2008 I use an antenna of similar proportions on 15 and 10 meters. Apr 26, 2013 · Use an 80 meter vertical loop, coax fed in the middle of the lower portion with a 1/4 wave 70 ohm coax and 50 ohm feedline to the shack. WebSDR Weert (NL) use this active loop antenna. After consulting many of the available Internet sources, and by combining ideas, I was able to assemble an antenna that performed well, even under poor band conditions. A 40 meter four-square vertical array is a good alternative when a horizontal antenna isn’t possible if a horizontal antenna can’t be installed at least 20 mtrs high a very good transmitting antenna for a second radio an excellent receiving antenna A 20, 15 or 10 meter four-square vertical is a useful Build a 160/80 Meter Magnetic Loop Antenna - Part 1. I found a 60 meter resonance for this 160 loop (third harmonic) and it did not work as well as a low dipole cut for 60 meters. There are numerous reasons why people shy away from trying to put up a good antenna for this band: On the left is an SWR Plot of full-wave horizontal loop at 60 feet, resonant at 3. long wire loop giving a lower takeoff angle than a dipole, which in turn gives a lower takeoff angle than the Loop Skywire. 57 Jan 04, 2020 · Follow-up — I used the loop for several hours on 80 meters in the ARRL RTTY Roundup last night. Jun 25, 2006 · W1TR 80 Meter Vertical Loop. I had an 80 meter horizontal loop for a year, but was not able to support 4 corners at any height above about 22 feet. The gain is around 4 dBd on 40 mtrs, but it will seem much higher due to the very low angle, radiation pattern. Each leg is about 70 feet long with the wires running N/S and E/W. I constructed a 1 meter diameter loop out of copper tubing in Europe around 1990 and set it on my desktop, indoors, in our apartment. These are closed loops  31 Oct 2017 Amy(AI6ZU) and I build a magnetic loop antenna for 160 and 80 meter amateur radio. Half Loop Antenna for the 80-, 40,- 20,- and 15- meter Bands. It's an interesting variation on a cross between a folded dipole and a delta loop. If you want it to work properly, you will need a means of measuring SWR, some trial and error, a little patience and at least half-a-brain to build this. In other words to increase radiation resistance, the loop has to be made spatially larger. Open Loop Antennas. The shape can be a circle, square, rectangle or a triangle. 8 and 3. 92 - V-Beam Antenna for 15m. model this antenna. This is probably due to the antenna being fed away from the house. of #16 "silky" stranded wire cut to one wavelength long on THE 20 METER MONOBAND DIPOLE THE 10 METER MONOBAND DIPOLE THE 60 AND 30 METER DUAL BAND DIPOLE. A Home-Brew LOOP Tuning Capacitor QST November 1994, pp. Magnetic Loop Antennas on 3. Phase three was putting up a second loop; a dedicated 80m antenna. 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. Well, I can’t claim to be the best antenna technician. 625 MHz = 277. By implementing a helically wound design a 6ft diameter 80 meter text book loop seems to emulate a 10 to 15 ft diameter loop of a single conductor. I’m feeding the loop via RG-8 coax, about a 30’ run. in my case: (crank up) tower for the first 10 Length of an impedance matching section made with 75-ohm cable with a cable velocity factor of 0. So no more Mosley PRO-57B, my full wave loops for 40 & 80 and the 160 inv-L. Jul 24, 2015 · Magnetic Loop Antennas for The Radio Operator with Limited Space pt. RW3DKB Loop Balcony Antenna (ALL HF) Simple Window Loop Antenna. 500’ roll of wire on ground 3. ), with a model 3000W 4:1 ratio balun Fortify your existing antenna or build your own with high-quality brackets, clamps, tubing and supports from DX Engineering. 86 feet = the length of both sides of the wire in the ladder line] = 217. The basic configuration of a small magnetic loop consists of the main loop, coupling loop, and capacitor - fixed or variable. Note:- Loops A -E have sides approximately (~) 1/3 wavelength but overall circumference delta loop is the same Build an HF Ham Radio Dipole Antenna It is easy to build, construct and erect a dipole antenna for the HF bands: 160, 80, 40, 20, 15, 10 metres, etc using a few simple components at a minimal cost and get great results. Tested up to 1000 watts SSB for a single loop. The 160 antenna covers 1800-1860 with under 2:1 SWR. The Horizontal Loop, also known as the Loop Skywire Antenna, is an old but very effective design. Nearly any  The perimeter of the 80 meter loop for 3. Note:- Loops A -E have sides approximately (~) 1/3 wavelength but overall circumference delta loop is the same The NJQRP Squirt This reduced-size 80-meter antenna is designed for small build-ing lots and portable use. This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. In the early Motor driven capacitor for use with 134 inch (340cm) loop to tune 160 to 80 meters. It's a Spi-Ro LS-80K limited space 80-meter wire dipole. Fast & Free shipping on many items! My Favorite 40m "DX" Antenna NOTE: This is not a plug-n-play antenna. 99. May 21, 2019 · The HG-1 Remote Loop Tuner It is a compact, easy-to-use remote tuner for a Magnetic Loop Antenna (MLA). com in 2 categories. While my 80 meter vertical helix works, it has an extremely narrow bandwidth, even with a balanced feedline into a balanced "tune". You could also try an inverted Vee cut for the 80 meter band. Small Coaxial Loop tuned for specific band Why a Portable Magnetic Loop? zExtremely Fast Setup (<3min) zBest Designs High Efficiency (>80%) zVery Easy Experimentation zVery Easy Design (using online calculators) zVery Easy to Buy (PY1AHD) zExcellent Noise Null zHigh-Q good for Multi-TX Environment zNeed Only 1 Loop Diameter Above Ground zResonant—No Tuner Needed zNo Radials or Trees Electromagne2c' Wave'Polariza2on' • Electric'and'magne2c'waves'are'at' right'angles'to'each'other' • Magne2c'wave'dissipates'within'a' few'wavelengths'of'antenna 40m-10m DELTA LOOP ANTENNA - GU3WHN The variety of one wave length loop shapes that can be deployed to suit the QTH . It was apparent that many stations were copying me much better than I could hear them, so something needed to be done. The general idea of a loop skywire is to put up as much wire as possible, without worrying about cutting it to resonance, and feed it with ladder line. As Kevin relates, " I create a two-turn loop to get down to 160 and it works quite well. As we live in a relatively small plot, I don't have room for big antennas, even for an antenna like 80 meter dipole. Lacking room for a beverage receiving antenna, we constructed several loop receiving antenna to see if we could find a suitable low /lower noise receiving antenna. It couples to the magnetic field of the radio wave in the region near the antenna, in contrast to monopole and dipole antennas which couple to the electric field of the wave. 40m-10m DELTA LOOP ANTENNA - GU3WHN The variety of one wave length loop shapes that can be deployed to suit the QTH . At left is the classic PJ-80 set with a single antenna winding and bipolar RF preamp. Any antenna tuned for 80 Meters should also work on 20 and 10 meters as well. by WH2T . The top is 23 meters high and goes to the right to a pole on the roof of the house. Often the “comparisons”only focus on the 40 meter amateur radio band. Add you loop wire of choice and your coax cable for rig connection, and enjoy DXIt consists of: Custom designed Air core transformer using 12g stranded wire. I recently saw that my 80m (3. 99 SBL-40 40 Meter Loop - $ 74. Introduction Of the many different antenna projects I have built for HF, the most interesting and rewarding project was the small transmitting loop. Loaded Loop Antenna (80- 10 m) Low Height Narrow Delta Antenna for the 80, 40, 20 and 15- meter Band. Multiband LOOP antenna made after the design by SP7LA for 80 - 40 - 30 - 20 - 17 - 15 - 12 - 10 meter bands with frequency ranges of 3500kHz to 3800kHz, 7000kHz to 7200kHz, 10100kHz to 10150kHz, 14000kHz to 14350kHz, 18068kHz to 18168kHz, 21000kHz to 21450kHz, 24890kHz to 24990kHz and 28000kHz to 29700kHz with overall length of 82. 160 m loop on 80, 80 m loop on 40, 20 m loop on 10, etc. Needed materials are: 60 meters of wire for the antenna; 23 meter height. Antenna gain is measured in either dBi or dBd. Construction. It’s a fine companion for the Warbler PSK31 transceiver. My tiny village lot ( . ,KL7JR Presented here with his kind permission from an article published in 73 Magazine "When I think back a few years ago I had 10 acres to use for my antenna farm. Other loops just can’t take the power that is often needed to break through or ‘make the trip’, but Some people use open wire line and feed a 80 or 40 meter loop on multiple frequencies. 850 MHz with approximately 350 pf of capacitance. All OMs owning a plot of 400 sqm or bigger are in the position to built a full size loop antenna for 80 and 40 m. 65 one side. 5 MHz, the SWR at that point is still high at 3 Apr 26, 2013 · My best performing horiz Loops have been cut for 40 and 30M. It is a full size antenna on 40 meters and a shortened 80 meter antenna. The formula used to find a full wave loop antenna is 1005 / FMhz. LC6050. 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, Working 160M From a Small Lot (and Larger Ones Too) Jim Brown K9YC k9yc@arrl. 22 acres) is great for taxes but limited in antenna potential and zoning laws prevent real towers. Pennant 5. 00. W4RNL Antenna Theory. 15 Nov 2011 Home-Made Magnetic Loop Antenna for 30 Meters. There was though one small advantage that I haven’t documented, and that’s the use of a vertical as a dedicated QRM receive antenna. The lowest I can find is at 2. To determine the approximate length in feet of a Full Wave Loop antenna use the formula 1005/Freq in Mhz = length in feet. 1m, Capacitor  Portable Alpha Loop (version 6. At longer harmonic lengths, the takeoff angle of the long wire loop gets even lower - remarkably so, as shown in Figure 6. The loop really, really cuts the mustard on 160, 80 and 40 meters compared to a dipole at the same height. I have no space on my city lot for a K9AY Loop or a Beverage antenna. Base & Portable HF 100 Watt Magnetic Loop Antenna; 10-80 Meter Alpha Loop, 100W 10-40M, 20W 40-80 magnetic $ 500. They are especially useful on 80 and 40 meters where they perform well at modest heights. " B-Square Engineering is the first to offer a Terminated Folded Dipole antenna, truly optimized for amateur radio use . com FREE DELIVERY possible on eligible purchases 5-band Small Magnetic Loop Using LMR-400 Coax for 10-20 Meters Larry Nelson - K5IJB . This improves the antenna's radiation pattern. It's an 1/8 wave vertical on 160 meters also. A portion of it can run on the ground - in which case the antenna wire must be insulated - or run parallel to the ground. The measurements below are for building a Double Bazooka Near Vertical Incident Skywave (NVIS) Antenna. Short Beverage or EWE 40-80 Meters: 1. A full-size Delta Loop, fed in the bottom corner, is a good low angle radiator and is great for working DX. If you were to scale our 1" tubing model to the 3. Phased Delta Loops for 80 meters K1KP uses a simplified version of the ON4UN feed for his 80 meter delta loops, which are ideally equilateral triangles that have their apices up at 70 feet and base legs about 8 feet off the ground. The large diameter yields broadbanded coverage of the 80 Meter Band. Jul 11, 2013 · Thanks for your note. 91 - Inductance-Loaded Shortened Dipole for 160m. The publication is devoted to the memory of  An In-Room, 80-Meter Transmitting Multiturn Loop Antenna. It is designed for portability, and can be assembled or disassembled in about a minute. The original design is from Harry Lythall, SM0VPO (ref. Again the "KL7JR Sloping Vertical Delta Loop 80-6 Meters" to maintain 1 WL on 40 meters which would also allow 80 meter use. The 80 metre performance was great, far better than trying to tune up a 40 dipole to work on 80. The larger the area of the loop the better it will work. All Antennas, Magnetic Loops, Portable. 54 MHz while using a DX Engineering 4:1 balun. Loop Antennas for ham radio. ARRL Product Review of the M2 6-Meter HO Loop Antennas. If we have a loop like this with a high feedpoint resistance, over 10-20 ohms, the antenna has very high loss. I did try a fullwave loop for 80 M but only was able to get it up about 25 ft and it was a total failure. See Fig­ure 8 for the SWR curves. 80 meter loop frequency plot The table above makes it fairly easy to choose the feedpoint impedance for the 80 meter loop antenna. The cable must have a multi-stranded conductor. In my previous 80-meter loop post , I showed that the measured SWR and the predicted power loss for the (roughly) 100 foot coax-only feed lo Great deals on Ham & Amateur Radio Antennas. Shop here for antennas, antenna systems, and antenna components from the best: DX Engineering, Cushcraft, Hy-Gain, Hustler, COMTEK SYSTEMS, Diamond Antenna, and more! Using my MFJ-269 antenna analyzer, I was disappointed to learn that the SWR across the HF bands was not at all what I'd wanted. This article will introduce you to an antenna I call the 3-Dimensional Folded Loop. A full wave for 3. The The small loop antenna is known as a magnetic loop since it behaves electrically as a coil . Reviews: 3, MSRP: 69. Courtesy of Hans PA3ECT Circular polarisation and propagation. And how to make one! By Chris, G0DWV. I have constructed several HF antennas by now, and I am starting to develop some practical knowledge about the topic. Description: option of either open wire feed or coax fed full-size loop antenna for 80/  If not, go for 80 meters or 40 meters. I have my multiband GP antenna at my backyard, and my 2m/70cm dualband quad antenna , so I can be QRV from 40m to 70cm. Introduction. Each end of the loop was soldered to an SO-239 connector. May 12, 2017 · Unfortunately, there are those instances, when comparisons present a very one sided view, leaving much to be desired. A Simple Direction-Finding Receiver for 80 Meters Dale Hunt, WB6BYU KUON HUNT, KB7WRG Title photo: The author takes a bearing on the run with a kit version of the completed receiver. In this video, Kevin Loughin builds, erects, and uses a 6-foot/1. In that article, Jan described the physical layout of his A low-profile, compact antenna made from copper tubing and using a small D. Most texts on the subject treat any loop antenna with a total circumference of is that the reactive near field radius is dozens of meters around the antenna. 24 - (2 x 29' 10”)[2 x 29. The stub in the top leg of the antenna opens the loop when operating on 40 meters and selected other bands. 5 1996 Can’t put up a really high horizontal antenna for 80-meter DXing? Maybe the vertically polarized “Half-Square” might be the antenna for you. The antenna is fed in the NE corner with 3 feet of 450 ohm ladder line to a 4:1 balun, through about 65 feet of 50 ohm coax to the radio. But the idea for the antenna is relatively simple and came from an article in a 1984 QST by Jan Gunmar, SM0AQW 1. 90 MHz. Fullwave quad loop is: 283. The Horizontal Loop antenna works well. I really don’t have room for a full, half-wavelength dipole, so I’m looking for options. It was great to be able to put wires on the towers or off my Dec 08, 2017 · Delta Loop Antenna 80 Meters The RADIO WORKS' SuperLoop 80™ is a high performance, full size, full-wave, 80 meter loop antenna. For the 80 meter band a full wave loop antenna resonant at 3. An 8 turn shunt coil covers 10-80 meters, the 16 turn shunt coil covers 160 meters. Enjoy multi-band operation with omni-directional radiation and significant gain on the 20-10 meter bands. I estimate this was around 60m in circumference. 9 Mhz = 257 Feet 8 The Delta Loop Antenna…. 05:1 (I can hardly see any movement on my meter). This antenna works great on DX BUT LACKS high angle signal to work the If you look closely at the picture above you will see a wire dipole hanging from the tower. 300 Ohm Twin Lead with the ends shorted is an option for even greater bandwidth. dBd. In a RTTY contest, the Band is full of big signals and lots of noise. I have personally used a 160 meter band Horizontal Full Wave Loop antenna with very good success. The 80 meter antenna is resonant at 3750 with the 130-foot length shown. Now you can place your HG-1 Magnetic Loop at a remote location, such as the top of your RV, away from obstructions, for better radiation efficiency and less Mar 17, 2017 · Place your dipole too high and you have an efficient 40m DX antenna; What height yields an efficient NVIS 40m NVIS antenna? The answer is found by examining zenith gain vs. The above graphic depicts the overall layout of the loop antenna consisting of 558 ft. The antenna was tuned for 1840 kHz to maximize FT8 digital mode operation. Full Wave Loop Antenna . I stumbled across this wire antenna project today. Reference loop, 40-meter full wave loop 36-feet high over medium soil, opened opposite feedpoint to make reasonable feed impedance on 80 meters. Resonant loop antennas have a circum­ ference of 1 λ. Using a 160 meter full wave loop in that fashion is likely to be counterproductive. The real 80 meter horizontal loop antenna at K0ZE is roughly square with the corners at 30-35 feet above the ground. I put up another se­parate du­al band an­ten­na for the new bands, now that I had a rig (FT-950) that cov­ered them. K5LAD's Assorted Ham Stuff "I can’t work 80 meters, I don’t have a good 80 meter antenna" How many hams have made a statement like the title of this piece? Quite a few, I’d be willing to bet. Here is a great article on building your own 3 foot diameter loop from copper pipe that will fit in the attic of a single story home. 947 feet Lengths above are in feet and inches. Half way there is another 80 meter coax trap. Perfect tuning on any band! 80/40 Meter Attic Antena I live in a tightly packed urban neighborhood without much room for antennas. 80/75 Meter Wire Antennas. Resources listed under Antennas for 80 meters band category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. For best performance, make your horizontal loop into a square, especially if it is to be used on several bands. long as a center-fed dipole. 89 - Indoor Loop Antenna for 80m. One of my 2008 antenna projects was a square spiral loop antenna for the 80 meter band. com FREE DELIVERY possible on eligible purchases Jul 10, 2017 · Here's an intriguing way to get on 160 and 80 meters with a stealthy magnetic loop antenna. 5 to 1 antenna Balun for Loop antennas. One of this summer's projects was to put up a full-wave 80 meter horizontal loop antenna, sometimes called a "loop skywire". You are looking at a AG6IF Talented Balun HP (Higher Power). The natural capacity between the turns will tune the antenna to (about) 4. 80m with 1/4 wave coax stub RG59. 5MHz) loop (or frame) antenna has been really the VSWR is better than 1. 144 - 148 MHz, square loop antenna. 8 Dec 2017 Loops are great antennas! My most effective arrangement has been a full sized vertical square pulled up into the big pines in back of my house. Select the loop antenna based on the Ameritron's BCD aux output; Switch between the normal antenna and the loop; Disable the loop and short the RX input while in transmit to avoid any RF present in the event the loop were to pickup significant amounts of the TX energy; Bypass the loop when the rig is set to bands other than 160/80/40m The frame antenna may not be the most efficient but it can get you QRV on 80 and is ideal for boats and holidays. Given her large lot and the pine trees  Review Summary For : KK4TR - 80 meter Loop. 5/3. Good news! If the antenna is close to the house, it's important to keep the power down. Earlier experiments with the 160-meter coil consisted of an end-fed 37-foot rain gutter antenna. Suggests her efficiency should be between 59% and 70% on 80 meters. The correct lengths for the various models will be displayed in the chart. The cable braid is opened at the top of the loop. This antenna is 58 ft tall and is mounted on a hinged base. How to build a mono band 80 meter 1/2 wave wire antenna. My Top Five Backyard Multi-Band Wire HF Antennas L. Despite its reputation as a "cloud burner" on the low bands, I have worked my fair share of DX on 80 and 40m with this antenna. I chose 58' for Mid 80 Meter Operation. Rectangular UB5UG . Directional Antennas. • To be a magnetic loop, the loop circumfrence must be less than 0. 5 MHz and Below. 80 (foam dielectric): Formulas. Because I live on a small city lot and the trees are not in perfect locations I asked myself how I could get this antenna higher? This is what I came up with. B. & 432 MHz. , extreme low or high impedances) at the tuner end, on all bands. 80 Meter Delta Loop Saves The Day; Hi Jerry, I had a similar antenna up for a while. The loop itself is 24 feet of 0. 50|270. W7AE built the first loop for 160m following plans laid out in the ARRL Antenna Handbook. The first Sep 05, 2014 · Perhaps the biggest thing my station is missing is an 80m antenna. An In-Room, 80-Meter Transmitting Multiturn Loop Antenna A little wood, some wire and a handful of components can make a directional antenna for indoor use where outdoor antennas are not permitted. AB0X Roof Loop 2. . A shortened  The SlinkTenna is a compact, quick deploy, portable, helical ham radio antenna. If you want 75 Meter operation make it 57 ft long. Surprisingly so. The easiest antenna to make and put up seemed to be a full wave loop for 80 metres. The following program will calculate the lengths needed to construct several popular wire antennas. 6m, Spacing 0. I feed the antenna with a short length (less than 16 feet) of RG-8X through a RemoteBalun® (current balun) made by Radio Works. The larger the wire, the wider the bandwidth. However, you may find that your mono band delta loop may tune up on it's second harmonic at a higher frequency eg. An In-Room, 80-Meter Transmitting Multiturn Loop Antenna May 30, 2018 · This entry was posted in Antennas, Guest Posts, Ham Radio, How To, News, Shortwave Radio and tagged 20 meter magnetic loop antenna, Antennas, Ham Radio, Harry Lythall (SM0VPO), Homebrew Mag Loop Antenna, how to build a magnetic loop antenna, Mag Loop Antennas, Magnetic Loop Antennas on May 30, 2018 by Thomas. The antenna schematic is identical to the 80 meter loop schematic shown on another page. I'd seen all sorts of recommendations Online about the length of wire for a 160-Meter loop, and none of the were 160 Meters. It was an 80 meter delta loop, apex up, with the top attached to the top of a 60 foot tower. The lower bands (80 and 40) want around 100 ohm, 30 and 20 want a 200 ohm feedpoint and 17 through 10 meters would be happiest with a 300 ohm feedpoint. One of those Jackson 804 / 805 VHF tuning capacitors with about 25pf will tune the antenna down to 3. $8. Double Bazooka NVIS Antenna Calculator. Using a shortened 80-meter horizontal trap dipole at 84 feet and vertical rotary loops has not solved my noise problem. 33 feet 70. For 160 meters a full wave loop antenna resonant at 1. The length or perimeter of a full wave loop antenna is 1005 feet divided by the frequency in MHz. Small Coaxial Loop 4. The 20 metre delta loop is easy to construct and unobtrusive for neighbours. The End Wire Size can range from 16 AWG to 12 AWG. height of the simple 40m dipole and the spiffy 40m full-wave loop. 84 meters (~ 272 ft. Theodore (Ted) S. A 40 meter loop requires less than 130 linear feet of insulated wire. This had 4 x 2 inch coils in each corner of the loop with 30 turns of 1mm wire and I stretched the loop all around the garden and even inside the attic to make the loop as big as I could. My two-element,  Details on constructing a horizontal skywire loop all-band antenna by Don Keith It is a bit short--by about 100 feet--for being a full wavelength on 160 meters. Hams often ask me to describe my 80 meter grounded half loop. But there is absolutely no reason why it  Delta Loop is a three-sided antenna suspended high in the air by vertical supports, 75/80 meters, 269. Welcome to Reddit's own amateur (ham Aug 11, 2019 · One of the best kept secrets of Amateur radio antennas are either the box, or delta loop antennas. I also have 222 MHz. The rest of the antenna wire is pulled down with a rope. Circular Polarization - NVIS Turnstile Antenna for 80 meter band with JUMA Turnstile Controller JUMA TC 2020-02-08 OH7SV Introduction to Circular Polarization Thoughts on NVIS circular polarization. 94 - Laid-Back Quad Antenna for 80m. A loop is a loop, so anywhere you "break" it for the This antenna works as a Full Wave Loop on 80 Meters and also works as a 2 wavelength open loop or Bi-Square on the 40 Meter band. I did 24 hour WSPR runs using 5 watts of power with each antenna on successive days. If your antenna is cut for the 80 meter band, its counterpoise will be longer than a 48 foot tower. Vertical antennas don’t occupy Use Your Tower as a Dual -Band DX Antenna . Dipoles & Coils. Courtecsy of Jan PA0SIM Click the pictures to enlarge 1. A little wood, some wire and a handful of components can make a directional antenna for indoor use   7 Mar 2019 80 Meter Frame Antenna by SMØVPO Two turn CELLFLEX 1/2"-CABLE-LOOP for 80m - 40m, Diameter 1. My experience of a 40 meter quarter wave gives me some confidence in this arena but I’m also wary of the different characteristics of 80 meters which maybe much more suited to higher dipoles. com 2004 marks my fifth full decade as a licensed radio amateur. The disadvantage of this approach is that the antenna gets a bit large - it does use 80 meters of wire! However, for those without so much space, a smaller antenna can be built and fed with the AH-4 with good performance. At right is the PJ-80A from Kazakhstan with split antenna winding and MOSFET RF preamp. The proof of a 160 meter full wave loop antenna's DX performance is highlighted by my  I don't have alot of room on my property for full size wire antennas let alone HF beams I saw an article in QST about using a 43' vertical on 80 & 160 meters. 405 inch diameter coaxial cable. Full Size Quad Loop 2. When disassembled the antenna easily fits in a suitcase or backpack. 1 Nov 2015 Larger HF loops, such as for use on the 80 or 160 meter bands, are usually mounted horizontally and are often used with an antenna tuner on  80 75 Meter Wire Antenna Sizes. 798 feet This antennas is complete, ready to hang. C. It was slightly angled at maybe 25 degrees since the tower was only 60 ft tall. com. The construction of the antenna is shown above and is a five turn loop of one cable from 5 ampere mains cable. It does indeed have . Pre-configured Loop Antenna Systems. To use the 10-40 meter configuration, simply remove the booster cable and revert to a single turn loop. 52 ft. Because of the narrow bandwidth at 80 m, a simple matchbox can help to use the complete bandwidth of the respective band when using transistor transceivers. The loop is resonated at 1. My SWR testing on the second harmonics showed RF and SWR needles swinging up and down together which usually isn't a good indication of an efficient antenna. 15 MHz, just above the 80 meter band. I feed the loop with ladder line and use an antenna tuner. 80 75 Meter Wire Antenna Sizes. 83 one side. With the dimensions shown each loop will be separated by 4cm. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! Amateur Radio, Land Mobile, Scanner, Low Power FM, and Airband Antennas. 88 - Indoor Loop Antenna for 80m to 30m. For a while, I used a W3EDP antenna, but to be honest, results were mediocre at best, and since the tuner I used was in the shack, there … Loop antennas have been popular with 80-meter DXers for more than 30 years. 87 - Capacity Tuned Folded Loop Antenna for 20m. Wire Antenna Calculator. About My 80 Meter Magnetic Loop The resource is currently listed in dxzone. 2 Home Made HIGH POWER Magnetic Loop. net –Drill more holes for antenna wires –Loop antenna wire through holes, 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 Jan 20, 2010 · K3ZXL - 160 Meter Receiving Loop Project Dan Schaaf 20 January 2010 _____ For several years, I have been struggling with atmospheric noise on the 160 meter band. Also, this antenna is quite, very quiet. 5 MHz and below are a special case. If an antenna works on 40 HORIZONTAL LOOP ANTENNA CONSTRUCTION . for 75/80 and 160 Meters . Delta Loop Antenna Radiation Patterns. B W4RNL Antenna Theory. If 80-meter current flows in the 160 antenna, it tends to flatten the current loop in the vertical section. x) for coverage of 10-80 Meters handles 100 Watts PEP SSB on 10-40 Meters and 20W on 40/60/80 Meters when the  A loop antenna is a radio antenna consisting of a loop or coil of wire, tubing, or other electrical Although a full 2. I fed it with 300ohm TV twin lead at one of the bottom corners. Buy 10-80 Meter (100W 10-40M, 20W 40-80) Magnetic Alpha Loop Antenna: Radio Antennas - Amazon. K9AY 7. 7 meters in diameter, this receiving antenna is a "small" loop compared to LF and MF Loop antenna, receiver, and accessories used in amateur radio direction finding at 80 meter wavelength (3. It’s fed atop my roof on a short mast, which also holds up a 2-meter-and-up discone. The direction of fire is broadside to the antenna. Everyone knows this, but none of the Sep 11, 2015 · This 40 and 80 meter inverted V antenna is made with loading coils. Fan Dipole. I can, though, reliably work out about 500 to 600 miles on 160. Fullwave delta  Another loop for 20- through 10-meters using a novel "trombone slide" arrangement as a tuning capacitor. height at finer intervals. The antenna This 10 - 160 meter tuned horizontal loop antenna is fed with 450 ohm ladder line all the way into the ham shack to an Palstar AT1500BAL balanced line antenna tuner. This was my only CW antenna at my 1979 expedition to Andorra. Mar 30, 2015 · A gasketed sealed Polycarbonate enclosure mounted at the base of the antenna sports two shunt coils switched through a relay. 93 - Picnic Vertical Wire Antenna. And unlike a dipole cut to one end or the other of 75/80, the loop does just fine  I was handed a leftover roll of 7/8" Cellflex cable from which I'm building a Magnetic Loop Antenna for 80 and 40 meters. The Alpha Loop is a 10-40 Meter transmit/receive magnetic loop antenna, which handles 100 Watts PEP SSB, 50 Watts CW, and 25 Watts Digital. It is important to note that … Full-wave loops are very popular antennas. Small portable loops are at a distinct disadvantage on 40, 60, & 80 meters, in comparison to a full size antenna. I worked all 50 states and several countries with 100 Watts using the antenna on the 160 meter band. I like to use a home made current choke to keep RF from coming back on the feedline. Buy products related to 80 meter antenna products and see what customers say about 80 meter antenna products on Amazon. K9EQ approach: Putting up an 80 meter loop is too much work! Chris picked out two trees and strung wire between them. It is hung with the narrow ends horizontal and long ends vertical. 648 Mhz 3rd Harmonic Halfwave in space is: 136. Again, the loop was the antenna-of-choice for Receive. It is a homebrew skyloop HF ham radio 2. In free space, the loop with the highest gain, how­ ever, is the loop with the shape that encloses the largest area for a given circumference. 8 Mhz is weak signal reception. I played some in the recent 160-meter contest and did fine at that distance. I again used this loop for 80 and 160 meter work in the recent North American QSO Party (NAQP) SSB Contest. An In-Room, 80-Meter Transmitting Multiturn Loop  An 80 meter multiturn magnetic loop antenna. Be prepared and able to communicate in case of emergency with the largest selection at eBay. 90 - Double-Delta Antenna 80m and 40m. There's a lot of information on the internet about delta loop antenna design, many options and configurations are possible. Some TIPS on measuring VSWR and troubleshooting M2 … Antenna Gain: dBi vs. I needed to take about 2 feet off the horizontal section to get mine resonant at 1830. 5 MHz). For horizontal sky loops on multiple bands (80-10 meters), we have a pre-configured loop antenna which only needs coax to complete the antenna system. This enables the Alpha Loop to be heard and be more Effective than any other manufactured loop. Improve Reception on the Lower Frequencies . Aug 21, 2010 · Argh! I have an 80-meter full-wavelength horizontal loop antenna and it came down in some recent winds. May 23, 2018 · Adventures with an 80 Meter Loop Antenna, Part 1 Some years ago while I was dating the woman who would become my wife, I thought about setting up a station at her The 80 meter loop is the antenna I would recommend to any amateur radio operator for the low bands. 23 May 2018 Talking with friends on the morning 75 meter net, one recommended that I install a full-wave 80 meter loop. The plots above show with a DX Engineering 4:1 balun and reasonably good coaxial cable, you can operate a loop over most of 80 and all of 40 meters. Figure 1—General construction of the 80-meter Squirt antenna. Good NVIS antenna heights. RE: Sky Loop 80 Meters One Element Reflector b W9OY on Augu 30, 2007 Mail thi to a friend! WOW I thin&thi antenna uld probabl wor&Pluto!!! Where n I bu a reall good ground? MFJ? 73 W9OY Sky Loop 80 Meters One Element Reflector b WW5AA on Augu 30, 2007 Mail thi to a friend! I li& m 160-6 & oop al , howeˇr a i the u ˘al I uld onl get it up to 25'. 1 wave length, more than that, the loop switches to electrical. You can mount this antenna to a mast pipe or to the side of a Rohn 20 or 25 tower. This summer was going to try feeding one of the vertical sides with open wire feeders and see how it performs on other bands. 3 The 1/2-wave 80-meter doublet with ladder line all the way to a 1:1 bifilar choke/balun in or near the tuner is a much better antenna for 80-10, provided you adjust the ladder line length to avoid the voltage and current anti-nodes (i. 38|67. It’s a great HF antenna for the ham radio operator with a smaller backyard! Using the Half-Square Antenna For Low-Band DXing By Rudy Severns, N6LF 32857 Fox Lane PO Box 589 Cottage Grove, OR 97424 This article was orinally published in the ARRL Antenna Compendium Vol. Cebik, W4RNL 1434 High Mesa Drive Knoxville, TN 37938-4443 e-mail: cebik@cebik. With a good antenna tuner the antenna will work 6 thru 160 meters. • The calculators give you theoretical values, your actual construction will also affect the antenna greatly. An 80 meter multiturn magnetic loop antenna As we live in a relatively small plot, I don't have room for big antennas, even for an antenna like 80 meter dipole. The Search for Quiet. The original is posted at Dual Loop 80 and 40 Meter ZZ Wave Net HF Wire Antenna Project by VE6VIS. 160 vs 80-Meter Isolated Off-Center-Fed Antennas -- by L. The orig­i­nal Jet­stream Multiband 80 - 10 Dipole nev­er had cov­er­age of th­ese bands. Radio users can  11 Feb 2012 They are often used on 160 and 80 meters. It works just fine and dandy on 20 meters as well but I'd rather have a dedicated 20 meter loop for 20 through 10 meters. Experimenting with wire antennas is a favorite pastime for me. 1). In part one of this series, I covered the use of one brand of commercially available, small transmitting loop antennas, also known as ‘magnetic loops’. I made a scheduled contact on 20 meters with a ham in New Zealand who was also using a magnetic loop antenna. I've added more ground radials (up to 32) and it seems to work much better. Figure 2—An assembled Squirt ready for installation. and “160 meter transmission line antenna,” Ham K9AY 80/160 Meter Switchable Loop Antenna System After operating a couple 160 Meter contests last Winter, I realized I needed to do something to improve my receiving performance. The physical arrangement of the antenna is difficult to describe, especially on CW. org The … K6MYC on Antenna Testing. The main category is Homemade projects for 80 meter Antennas that is about Antenna projects for 80 meters band. The 160-meter coil plus an 80-meter mobile antenna were placed at the far end opposite the feed point. A great aimable DX antenna. I recently had great results with a delta loop on 10 meters and a rectangular loop on 20 meters,   a half-sized G5RV and I genuinely thought that I'd never get onto the 80 meter band. 7 Dec 2016 A small lot high-power transmitting loop for the US MF 160m band. The cross is the 80 meter coax trap. 80M Grounded Half Loop. Apr 29, 2010 · "The feed point can be anywhere along the wire, but is normally made near one of the supports simply to lend stability to the antenna system. Here is a photo of W2BRI with his 12 foot square magnetic loop antenna. So far I had really not been active on 80 meters, due to antenna limitations and its perceived suitability for DX (I am not interested in local rag chewing ). Updated 25-Jun-2006 12:40 [back to W1TR Antennas and QTH][back to W1TR Home]The 80 meter vertical loop is constructed from #10 stranded insulated wire available in most hardware stores. 75/80 meter loading coils (68/73 feet/antenna length) $20. • 75/80 meters 269. W0CM 6. by Popeye. This type of antenna radiates most of its signal at very high angles, which is perfect for using Near Vertical Incidence Skywave (NVIS) propagation to contact stations up to about 500 miles away on the 80 meter band. maximize the amount of antenna that I can fit on my 1/2 acre lot (an 80 meter loop is only 72ft on a side vs the 135ft overall length of an 80 meter dipole) without having to put up masts or towers. the antenna out of solid 14 gauge copper Modified Half-Loop Topic: antenna. The loop construction technique provides for light weight and cost as compared to a 15 ft loop constructed from copper tubing. I put up an 80 meter full wave loop using about 280’ of #14 wire in almost a square. 99 SBL-30 30 Meter Loop - $ 65. The Vertical Loop is a good DX antenna. ransmitter For transatlantic or transpacific contacts, the Lazy Loop was equally as strong as the directional antennas which were also mounted at 10m (33') height. Encouraged by the results I built one for 80m. On 40 meters the SuperLoop 80™ is a 2 wavelength open loop or Bi-Square. It performed about the same as a half wave dipole. incorporated the 40 meter section into the 80 meter length. Twin Triangle Antenna for the 10- meter Band . The most common material for home building small ham radio loop antennas is common copper plumbing pipe. 95 - Phased Loop Antenna SBL-160 160 Meter Loop - $159. Magnetic loops at 3. Reviewed by Bob Allison, WB1GCMAssistant Laboratory Managerwb1gcm@arrl. Coupling  As described above, I built the 80 meters spiral loop antenna designed by Harry, SMØVPO. The Delta Loop is not only a great transmitting antenna but a low noise receiving antenna. Rappaport, N9NB . In the handbook the specifications for this antenna indicated it would' work on all of the bands above 80 metres also, that is 40 - 30 - 20 –17 - 15 - 12 and 10 metres. A "magnetic loop" antenna, so named because it responds primarily to the magnetic rather  ARRL Product Review of the M2 6-Meter HO Loop Antennas. motor to remotely tune the capacitor. By Richard Q. Many configurations exist when constructing the main loop and secondary loop. This calculator enables you to test the design of an octagonal loop antenna and to answer "what if" questions until you arrive at a design that meets your needs without a lot of experience in electronics. 99 SBL-80 80 Meter Loop - $121. 45 - 3. His headphone is sewn into the blue sweatband, and the blue wires to it run down his right sleeve. Let’s plot the antenna gain at zenith vs. On the right is the 40 meter SWR plot. The lower  21 Aug 2010 I have an 80-meter full-wavelength horizontal loop antenna and it came down in some recent winds. 5 MHz frequency, you would need a 12 foot diameter loop and a 215 pF capacitor to achieve a 40% radiation efficiency. Compared to  Have you been thinking about experimenting with a loop antenna, but are not sure NOTE: All results may be presented in either feet, meters, or centimeters. 30-32 Another loop for 20- through 10-meters using a novel "trombone slide" arrangement as a tuning capacitor. May 23, 2018 · It seems clear from this very basic, but perfectly reasonable, EZNEC simulation a full wave 160 meter loop running in the 80 meter band is a good antenna for DX work, but leaves much to be desired for NVIS even if you lower it towards the ground like you do with a dipole. Horizontal loops may be fed at any convenient spot. 2 Mar 2009 He is contemplating using it for NVIS on 80 meters. 9 Mhz would be about 529 feet long. Marris, G2BZQ See Feedback, May 1996 QST for corrections to this article. The apices are spaced 20 feet apart, with the bases spread to a distance of about 50 feet. I therefore decided on a concentric configuration similar to a multi-band quad antenna. The exact shape of the loop is not particularly important. Dale’s map and compass are in his left hand. It covers the 80 meter through 6 meter Amateur Radio bands and can handle  19 Jan 2020 ANTENTOP- 01- 2012, # 016. 58 74. I also had vertical loops for 20/15/10M, as in a cubical quad beam antenna. An optional 40-80 Booster Cable makes the Alpha Loop into a two-turn loop, enabling TX/RX on 40-80 meters, which also improves efficiency on 40 meters over the standard 10-40 meter configuration. For example, for an 80m loop, the diameter of the wire compared to its length is   Magnetic Loop Antennas for 160 through 10 meters. 600 Mhz 10. Post navigation Low Band Antennas at W3LPL High Performance Transmitting and Receiving Antennas for 160, 80 and 40 meter DXing and Contesting Lessons Learned from The Vertical Delta Loop • A three sided loop is known as a Vertical Delta loop sitting on the ground. 99 K4TR FULL WAVE DELTA LOOP Another made to order classic antenna which is also a superb performer. Since the antenna is only up from 15 feet to about 35 feet above the ground, it is not a DX antenna on 160 or 75/80. It is designed specifically as a retrofit for the popular preciseRF HG-1 MLA. What makes a antenna better? The Slim Jim Antenna is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. A loop fed in the southwest corner will have a few dB (3dB or more) gain favoring the northeast corner. Let's call  16 Jan 2010 80 meter loop frequency plot The table above makes it fairly easy to choose the feedpoint impedance for the 80 meter loop antenna. The antenna is resonate on both bands and does not require an antenna tuner. This is a shielded loop. Dave Hollander N7RK . Antenna projects for 80 meters band category is a curation of 169 web resources on , The Hudson antenna, Phased Delta Loops, 80 Meter Vertical Loop. 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! Aug 06, 2015 · G4ILO describes the Wonder Loop this way, The G4ILO Wonder Loop is an inexpensive, easy to make magnetic loop antenna that covers five HF bands, 40m through 15m. I will first describe the basic 3-DFL and then provide construction details for the 2-meter and 10-meter 3-DFL antennas. The 80 meter bandwidth of my 6 ft loop is 11Khz. That is a square of only 33 feet per side. 798 feet • 160 meters 528. The performance of these small antennas can be magical. As often the Internet provided the  10-80 Meter Magnetic Alpha Loop Antenna handles 100W on 10-40M and 20W on 40/60/80 Meters when the included Booster Cable is installed. 67 feet 91. 11 Sep 2018 Hi again, Tapping the main loop has been don, but not both tapping and feed loop, to my knowledge. It's fed atop my roof on a short mast, which  K9AY Loop antenn för (40), 80 och 160 meter From Array Solutions comes this control box AS-AYL-4 for assembling a low band receiving antenna in four  My requirements called for both 160 and 80 meter capability. "I LOVE MY LOOP" "I Sure Did" An All Band 80 Meter Loop Project by John Reisenauer, Jr. The result is a "hybrid" dipole or "ungrounded" vertical amateur radio antenna, depending on your point of view! The feed point is just outside my basement shack window, about one meter (3 feet) above ground. The relay is controlled via a switch mounted on our antenna control box. Resonant antennas cut to the exact frequency, in the middle portion of the band, and used with a tuner of sufficient size, can tune several bands. I decided to install an 40 meter dipole in my attic space which is about 25 by 45 feet, and about 25 feet up from the ground. 80m Antenna for small gardens. Half Square Antenna. Using an MFJ Antenna Analyzer I can’t find a nice low SWR point. One of the greatest problems encountered when one likes DXing on the lower frequencies such as 1. This antenna is the result of my continuing efforts to compact full-size antennas by folding and bending the elements. 80 Meter CW Center Frequency: 3. The formulas for calculating the approximate length of a full-wave loop antenna are: Full-wave loop in feet = 1005 / frequency in MHz; Full-wave in meters = 306 / frequency in MHz Nov 01, 2017 · 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. e. 80 meter loop antenna

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