Each leg is 94.37 feet. The balun is attached to the top of the house using Para-cord and a pulley, the cord is tied off on a cleat. Created by on 2013-01-24. The Sigma Euro-Comm DELTA- 80 HP Multi-Band Full Wave Loop Antenna Wire Antenna. This is the Full Wave Delta Loop Antenna. 195 billion pixel . Apex @ 30ft and legs @10ft. You may feed this antenna with a 4:1 balun. This allows the antenna to be lowered and adjusted for maintenance and tuning. Ugh! It is best to hang the 20 meter loop in a vertical fashion. the antenna would more resemble a delta loop no doubt! Radiation Patterns. This is where the standard is set. Karl, DK5EC, describes the construction of a simple multiband delta loop antenna (skywire) for the 80m - 10 m bands. I am really impressed with the signal strength on 80M, and 40M is well above par. 80 Meter Delta Loop Saves The Day. Conditions have been average lately so it has to get better as the propagation improves. Mounting the 20 metre delta loop. The antenna can have a slope or a slant to it. Use black insulation for stealth. Loop antennas have been popular with 80-meter DXers for more than 30 years. With the Drake MN-4 in the system, I was able to get a SWR of 1:1 on 40, 20, 15, and 10 meters using my trusty Ten-Tech Argosy II transceiver. Scaled-down versions, say 75% of a wavelength may also work fine if you don't have the room for a full-wave or longer antenna. Loop antennas may be constructed in many forms including horizontal full wave loops in square, rectangle or triangle (delta) shapes. vermont spotlight. The delta loop was fed at the lower left hand corner with two-conductor #18 AWG speaker wire from Radio Shack. This multiband antenna covers the 80, 40, 30, 20, 17, 15, 12, 10 and 6 Mx Amateur bands. and hoist the loop back up. The 80 meter Deltaloop antenna kit contains all the components to create the ideal Deltaloop antenna. . so that is the magic number I will also use to maintain 1 WL on 40 meters which would also allow 80 meter use. Likewise, the advantages of a coaxial cable compared to a chicken . It was perched on a 2.5 inch OD, 1/4 inch thick wall, moly steel mast and turned by . The feed point (balun) is mounted at the top of the delta in the image above (option #1), the feed point can be positioned . Resonant loop antennas have a circum ference of 1 . With the antenna calculation program EZNEC, the setup is theoretically prepared and documented with the inexpensive antenna analyzer miniVNA or graphically documented. This antenna is resonant at 3.650 MHz A year later, I started phase-two. The formula used to determine fundamental frequency wire length is :- Length . Dipoles need to be half a wavelength long, locating these long antennas can be an issue, especially when we are aiming for the 80 metre band or lower. Multiband operation is achieved by use of 300 ohm balanced line fed to an antenna tuner. Until Monday, 12/17/12,when a 102 MPH windstorm hit my QTH I had four HF antennas at my QTH in Eastern Oregon. To build this antenna you need a lot that is at least 100 feet across. This is an Outdoor apartment, house, condo, attic or garage 80M Radio Transmitting antenna. My big loop performance experiences: (North. The SuperLoop 80 has been used on several DX'peditions. According to antenna experts, a circular loop is "ideal", but . The theoretical length for a full wave loop is: Circumference (in Feet) = 1005 / Frequency (in Megacycles) This works out to a total length of wire of about 529 Feet at 1.9 MHz. The 80 meter loop is really designed for 80M and 40M. This will show the true potential of this fine HF antenna. . On 75 and 80 meters, you should have about a 220 kHz bandwidth. (80-10 meters), we have a pre-configured loop . 80 Meter Full Wave Loop Ham Radio Antenna or Amateur Radio Antenna. A Force 12 C-31XR for 10-20 meters sat at just under 100 feet atop a Rohn 45 guyed tower. I used a 1:1 balun from DX engineering. Band-changing from 80m to 40m was a nightmare though; out to the garden, lower the loop, connect the ends (or disconnect them!) The result would be a very high (impractical . An Easy to Install Vertical Loop for 80-6 Meters. However, we can reduce the space needed to a quarter wavelength if we decide to . The base of the Delta Loop is only 10 feet above average ground. In the following, the construction of a simple multiband delta-loop antenna for the bands 80 -10m is described. The 80 meter Delta Loop is mounted in a vertical plane. 75/80 meters 269.798 feet 160 meters 528.947 feet Lengths above are in feet and inches. Length of an impedance matching section made with 75-ohm cable with a cable velocity factor of 0.80 (foam dielectric): Formulas. The connections have to be solid or the antenna system will not function right. 2 "KL7JR Easy Vertical Loop 80-6 Meters" (at Hamuniverse.com) No log in required! The 80 meter loop is really designed for 80M and 40M. 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 by John Reisenauer, Jr. KL7JR. The exact shape of the loop is not particularly important. The two above pictures show the radiation pattern of the Delta Loop fed in the bottom corner of the antenna. So, my "longer" loop is about 1.25 wavelengths on 80 meters (2.5 on 40m, 5 on 20m and 10 on 10m) and is installed between 30 to 40 feet in the air. The DELTA-80HP is a full-wave loop designed to operate on 80m (3.5MHz), 40m (7MHz), 20m (14MHz), and 10m (28MHz) without an ATU and other bands with an ATU There is a 4:1 balun at the feed point enabling it to be fed directly with 50ohm coax - RG-213 or Mini 8 is probably the best but other variations of coax . The performance by CW/digital band segment of this antenna is: 80 meters, SWR 1.7:1, 6.7 dBi gain at 87, 0 dBi gain at 22 . Just don't hang it up horizontally. This configuration is best suited for working long haul DX. In the following, the construction of a simple multiband delta-loop antenna for the bands 80-10m is described. This is where the standard is set. . Covers the full 80m band or it can also be tuned out of band if you need. What is a Delta Loop It's a Full wave loop in the shape of a triangle, with sides of 1/3 wave length . When cutting wire to make the Antenna, always add some for final tuning and the physical attachment on insulators. 40 meters 140.559 feet 75/ 80 meters269.798 feet 160 meters 528.947 feet. The Delta loop antenna is not used as often compared to other antennas, yet these antennas have many advantages. Coax fed loops will usually have an SWR between 2:1 and 3:1. It is extremely easy to build and only requires 136 feet of wire and a tuner. . The SuperLoop 80 is an outstanding performer on all bands, 80 - 10 meters. It worked! For example, the antenna is symmetrical and closed, so that the reception will in many cases be quieter compared to asymmetric or . 40 meters 140.559 feet 75/ 80 meters269.798 feet 160 meters 528.947 feet. I am really impressed with the signal strength on 80M, and 40M is well above par. Orientation: East/West with top feed @ 20 FT above motor home roof. Summary. No balun or choke coils necessary. The delta loop should be at least 1$\lambda$ in circumference for the lowest band. . Antenna covers all bands 80-10 meters + 30, 17, 12 meter WARC Bands 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 had plenty of contacts on 20 and 15 meters during the day, with some excellent Pacific and . HF LOOP ANTENNA'S DELTA & HORIZONAL LOOP'S By George Riedel . I cut a 6 foot section of wire out of the loop, half-way around the 40m loop as a daring experiment to give me a halo dipole for 80m. I was confident this "sloping loop" would work fine even though it deviated a bit from the original design of three sides at 40 feet long each . 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. This means that if we try to feed 7 MHz to 3.5 MHz (80 meter) dipole, the 7 MHz current would be at a minimum (null) at the center feed point of the 80-meter dipole. I had South Africa on 12 meters on the first QSO. Design of K0ZR 80m Delta Loop Looking at Figure 11 to the left, the following dimensions are in use: Angle: 35o Y = 80.6 Ft X = 132 Ft H = 46 Ft ( distance from baseline of delta to apex ) Tot Hgt = 52 Ft ( Delta base 6 ft above ground and H = 46 ) In the end, some adjustment to the position of the insulator on the bottom- TERMINATED INTO 4:1 ARRAY SOLUTION BALUN . This will show the true potential of this fine HF antenna . On 160 meters you should see about 110 kHz bandwidth. 80m 2 element Yagi antenna. 1 - 20 ft Flag Pole Kit ( Lowes $150.00 ) 200 - ft LMR 400 Flex ( Ham Radio Outlet $258.00 ) 2 - PL-259 Amphenol Connectors ( Ham Radio Outlet $4.98 ) 1 - Alpha Delta Center Connection Package with the 2 tie off insulators ( Ham Radio Outlet $24.95 ) 500 - ft Green 14 Gauge . ie. System losses are low. (Updated August 1, 2014 . "KL7JR Sloping Vertical Delta Loop 80-6 Meters " Imagine 9 bands on one wire antenna ! The following analysis is for a horizontal, equilateral triangle loop with all three corners at 60 feet. 6. My final 80 meter wire antenna design is simple.. and it works great! The construction will be theoretically initialized with the help of the antenna calculation program EZNEC, and later measured and graphically documented with the inexpensive antenna analyzer miniVNA. They can also be in the vertical plane and are most often in the same shapes with the delta being very popular as it has both vertical and horizontal polarization. parallel to the ground. Dimension "A" is the height of the antenna from the base to the apex, not . THIS IS WHAT CHRIS HAS TO SAY ABOUT THE 80-10 METER DELTA LOOP Joe The delta loop that you made for me is working great. 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. and have a 50 foot run of Belden 9913 into my shack. Vertical works better. Conditions have been average lately so it has to get better as the propagation improves. This wire is available as a spool of STRANDED #12 or #14 THHN wire at Lowe's for less than $50. The physical length of any HF antenna is critical to achieving resonance and good performance on a particular band. Phase . The design frequency, the feedpoint impedance, will be between 80 and 150 ohms. A doublet antenna (dipole), cut for 80 meters, will not work on 40 meters because 7 MHz is an even harmonic multiple of 3.5 MHz. One of this summer's projects was to put up a full-wave 80 meter horizontal loop antenna, sometimes called a "loop skywire". W5WAA HAS A FEW INTERESTING THOUGHTS ON THE G5RV 80-10 METER ANTENNA . If the loop is in the shape of square or large rectangle, the SWR can be below 2:1, but will not get much below 1.5:1. A previous loop article by Steve Ford, WB8IMY (May 2002 QST, . Ref. Combine all band operation, coax feed, with gain on all bands, and the SuperLoop 80 the obvious choice in a multi-band DX loop antenna system. The first was Navassa '88. Note the low angle of radiation. With the antenna calculation program EZNEC, the setup is theoretically prepared and documented with the inexpensive antenna analyzer miniVNA or graphically documented. This loop antenna needs to be run in the horizontal plane. Delta Loop Antenna. This is a 80 meter full wave loop or can be mounted as a delta loop, transmitting antenna. A full-size Delta Loop, fed in the bottom corner, is a good low angle radiator and is great for working DX. It doesn't have to be straight up and down. If your having trouble reading the info on the bottom section of the map, it says: ANT: 150 FT Long Vertical Sloping Loop (somewhat square), 1WL on 40m.
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