20 meter loop


datel. The 4mA to 20mA signal is an industrial standard electrical signal that was designed to send information from one point to another. MFJ Enterprises Original MFJ-1640T 40 Meter HF Stick Mobile Antenna - 3/8-24. 5 ft in circumference and 23% efficient at 10. The 20-meter or 14 megahertz (MHz) radio band falls within the high-frequency amateur radio spectrum. The loop tunes about 13. 1005 /F(MHz) feet or 306. e. It’s also possible that proximity to the roof of our house and the metal chimney affects the radiation pattern. Assembling the 20 Meter Antenna Matchbox For the popular 20 meter band, a suitable inductor can be made with 26 turns of enamel coated # 22 copper wire wound on a T80-2 toroid as pictured on the lower left. ] so a loop for use on 146. I had dipoles for 80, 40, 20, 17 and 15 meters in my backyard, but they were all too low to be really very effective. 3' drip loop. wavelengths in the loop. Flux and brush to spread the flux. No need for a tower, rotor, and beam to get rare DX or be competitive. Mounting the 20 metre delta loop The balun is attached to the top of the house using Para-cord and a pulley, the cord is tied off on a cleat. Fluke 771 Milliamp Process Clamp Meter is rated 3. My operating conditions are: - Radio IC-7000 @ max power (100W). This is due to the slightly decreased velocity factor of insulated wire. Particularly critical in the magnetic loop design is the voltage across SBL-80 80 Meter Loop - $124. 67’in diameter (1. attachments of the service conductors, a drip loop must be formed with the service entrance  I used a loop on 7 MHz and it worked fine except in northern and southern If you have limited space for antennas and want to work DX on 20 meters this one  Velcro 1" x 20 meter Harga diatas adalah harga 1 set ( Halus & Kasar ) Digunakan untuk Pengikat Atau Perekat yang terbuat dari 2 bahan yang saling  3 Aug 2018 I prefer the single pole support with my antenna fashioned as Delta Loop for 20 meters and up. For the 80 meter band a full wave loop antenna resonant at 3. second 10-meter delta loop (tuned a bit lower in frequency than you normally operate) suspended inside the 20-meter delta. Example : For a 160 meter loop, 1005 divided by 1. 859 feet or approximately 6’ 10 3/8”. METER: 3½- or 4½- digit LCD, 4-20 mA current loop-powered indicator. - Cond. 40m-10m DELTA LOOP ANTENNA - GU3WHN The variety of one wave length loop shapes that can be deployed to suit the QTH . The Moxon Rectangle I started thinking of putting a simple rotat- The classic delta loop antenna can be used for both home and field use. A good pair of leather gloves (highly recommended) 10. 88 - Indoor Loop Antenna for 80m to 30m. 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 Feb 25, 2017 · When I lived in an apartment 20 years ago I used a 1 meter loop on my desk inside the apartment. Lawn Antenna. Home-Made Magnetic Loop Antenna for 30 Meters. 6. As noted in the sidebar, “M2 6-Meter HO Loop: A Description,” the exact front-to-side ratio depends on the height above ground, and my lower loop is only 18 feet above ground. Albert Waggoner Radio. CM Equilateral Delta loop for 20 meters, apex up. To get multiband performance (20 meters through 10 meters), use 450 ohm ladder line, 300 ohm TV twin lead, or homemade 600 ohm twin lead in conjunction with a 4:1 balun KL7JR 5 BAND PIPE VERTICAL - 20-17-15-12-10 METER VERTICAL ANTENNA PROJECT. I have worked 24 countries with my 20 inch loop. A "One-Masted Sloop" for 40, 20, 15 and 10 Meters. The antenna does not require guy wires. The loop really, really cuts the mustard on 160, 80 and 40 meters compared to a dipole at the same height. The 10-meter version of this antenna provides good performance and is just as easy to build. Partisan Antenna for 40, 30, 20 and 17- meter Bands (R3KAS) Simple Loop Antenna for 20-meters. It is often the first antenna they buy or build for use on 2 meters after receiving their technician license. First, determine that the 4 mA signal is being produced under conditions where controls are not required. A few days ago, SWLing Post contributor, Robert Gulley (AK3Q), pointed me to an excellent website by Harry Lythall (SM0VPO) which is chock-full of various homebrew radio projects. I have no space on my city lot for a K9AY Loop or a Beverage antenna. The direction of fire is broadside to the antenna. Early in 2017 the Radio Society of Great Britain published a 2-meter band halo design, which looked easy and fun to build. 3. My first 20 meter delta loop was mounted kind of low to the ground, but it did okay. 15 Meter Antennas 15 Meter Beam -- From The ARRL K5OE Antennas-- HF Antennas - 10/15/20 m Dipoles 15M Delta Loop 15M Yagi Optimized Wideband Antenna A One Element V Beam For 15 M From KB4XJ Verticals 12 Meter Antennas 12M Beam Antennas -- From The ARRL Verticals. Fed at the top or bottom corner of a diamond the antenna then has a horizontal polarization. CE GND Reference UNITS Meters Height 8. The 4-20mA current loop is a very robust and popular sensor signalling standard. 94 - Laid-Back Quad Antenna for 80m. 000 dari toko online VIndyna Shop, Jakarta Pusat. 99 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. Calderon (DU1ANV) Makiling Amateur Radio Society (MARS) [This article is dedicated to our fellow MARS’. 20 Dec 2019 20, 2019— The West Central Association is excited to announce that the meters and residential permit parking ordinances in the West Loop. Set your store to see local. Displays pressure, temperature, or any other variable proportional to the  5. 20-22. This antenna system is on the 80M tower. Joined: Jan 4, 2009 but 10/11 meter verticals are pretty scary looking to non-radio 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. Figure 2 — Tracking loop antennas. Doomsday Loop zButterfly Capacitor: Found on Ebay with HORIZONTAL LOOP. 8 Inch X Double Sided Sticky Tape (20 Meter Male & Female) (White): Amazon. The combination service entrance device features a ring-type meter cover with a Moxon Antenna Projects-- 17M and 20M Via KD6WD Verticals. This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. Loaded Loop Antenna (HF, 80- 10m) Low Profile Antenna for the 30, 20, 17, 15, 10 and 6- meter Bands. Tuning the Loop Placing SWR meter at base. May 30, 2018 · The completed 20 meter loop antenna. The Half Square antenna is a wire antenna with two vertical radiators fed in phase. 32 one side. I decided on a basic and minimal small loop, 3' in diameter, using a stub made from quality window line as the tuning capacitor. P. 89 - Indoor Loop Antenna for 80m. . Aug 22, 2013 · On 17 meters a 20 meters delta loop is longer than 1λ, while on 30 meters it is over 0. The Loop Skywire. 17|69. 80 meter loop structure display This 80 meter loop is actually 86 meters, or 282 feet of wire. Weight 8Kg Here we discuss about the general 4-20mA Loop Power Supply Questions and answers come across in industrial instrumentation. Loop Antennas for ham radio. Theory said this should work 10-20 meters. 24 Feb 2019 61 – Tri-band Delta Loop Antenna for 80m – 40m – 30m 87 – Capacity Tuned Folded Loop Antenna for 20m  10-80 Meter Alpha Loop, 100W 10-40M, 20W 40-80 magnetic. An inexpensive, easy to build full wave wire loop for 80- or 40-meters. is cut for 160 meters, then operation on the harmonic bancs (80, 40, 20 and 10 meters For example, if you want the antenna to be resonant on the 160 meter band at 1. Conceptually, the multi- band quad is a simple antenna, with separate driven and reflector loops for each band. The DVM should be able to read Volts and milliAmps DC. 000 Over Ground 13 5 (Diel. Who owns the Meter Loop? The member owns the meter loop and is responsible for upkeep and My Loop Antenna November 20, 2013 13 My Loop for 40m –15m •Main loop is LMR-400 coax (0. 160. Follow this simple guide and we will show you a few tips to make it fast and easy. 05:1 (I can hardly see any movement on my meter). 26"W x 3. suggested height at least 5m, works well even at 2m over the ground. 2KW pep. Aug 14, 2018 · An easy, inexpensive gain antenna that you can build for 20 meters. 92 - V-Beam Antenna for 15m. O. 798 feet • 160 meters 528. 28 19. 90 - Double-Delta Antenna 80m and 40m. The stub in the top leg of the antenna opens the loop when operating on 20 meters and selected other bands. 2. At 20 meters and above they don't hear much, but I believe that if a preamp were to be placed at the feedpoint they would probably respond well right up through the 10 meter band. Displays in mA & % 4 to 20 mA. 1. For example, my 30-10 Meter loop is 8. I used a 50pf vacuum variable. 55 simplex would be: 1005/146. 17 Mar 2019 [Eric]'s build is designed to operate at 100W on the 20 meter band, and this influences the specifications of the antenna. The loops are nearly invisible, and fairly indestructible, even through the wind, snow, rain, and sun that we experience up here in the northeast. 2 MHz) 15 meters ( +/- 21. On one of the reflectors I saw a comment by N7TK, John, that he uses a coaxial loop on 160 for receive. minimum temporary post burial depth. 9 to 14. Mount a second 20-meter loop (again, tuned a bit on the low side) inside the 40-meter delta. Chris is a very personable  24 Jul 2015 The BIG Loop is for those like me, who want an EFFICIENT antenna to use in a small space from 20 meters downward past 60 meters and with  To measure a 4-20 mA loop signal with a process clamp meter: Access the signal wires (typically by removing the cover on transmitter). 1Mhz but 91% efficient at 28Mhz. My first contact to Australia was on my 20 meter loop, so it has to be working great. May 07, 2018 · 160-20m LOG loop-on-ground of time was a T2FD from RF Systems which performed very well down to the 90 meter band at a maximim height of about 20' on the top end. This is not to say that the 3-DFL is immune to earth losses. 71 meters in length with the feed point 3/4 of the way down one side (5. Good job. Will this delta loop work you ask? I’ve talked all over the U. 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. Economical 4-20 mA Loop-Powered Indicator. My apologies to Harry. Copper pipe sanding brush 8. This line is also rather inexpensive, with a 100' roll of 300-ohm window line at around $20. The  For the indication of process values in the field or in the panel. Loop Controller, controls both loops with side switch . 2 dbi but at an angle of almost 30°. Here is my version of the 20m delta loop at the Bay-Net. files. 44-46. I've wanted to try out a spiral loop for awhile. 559 feet • 75/80 meters 269. The fd has shorts at 8 feet from the fp on each leg. 91 - Inductance-Loaded Shortened Dipole for 160m. Member. Left to right: 24-inch copper loop, 20-inch aluminum loop, 16-inch #22 AWG wire loop with plastic tubing. 1 MHZ) full-wave loop antenna will also be resonant on: 20 meters ( +/- 14. ARRL QST March p17-18 & 150 “Lewis G. 07/03/2019. com. The red circle on wire 1 is a source , which is where we will connect the transmitter to the loop. It is possible to damage the loop, the DVM, or Jan 16, 2018 · A 4–20 mA current loop is a means to pass a “value” like flow using an established electrical current (the loop) as the carrier of this information. This was chosen as one of the club’s projects. 947 feet Lengths above are in feet and inches. You can also use it to measure output signals from transmitters without breaking the loop when 20 meters QRP Dipole; 20/40 Dual Band Dipole; 3 Element 28 MHz light weight Yagi; 4 Elelemt Yagi Beam Antenna for 20 meter; 5 Element full size Yagi for 20 meters; 55' Vertical Antenna For 40/80/160 Meters; 7 element Yagi for 20 Meters band; 80 Meters 2 Element Quad Antenna; 80M Vertical Antenna with Capacitance Hat; 80m Loop EZNEC Analysis; A Loop Antenna Step Attenuator HF Receiver Signal Strength Meter 30 20 10 Figure 1 — An RFI tracking system. Construct a compact, 20 meter rotatable dipole antenna of durable weather worthy components supported at a single point obviating the need for multiple supports and multiple support ropes crossing the yard. The gain is around 4 dBd on 40 mtrs, but it will seem much higher due to the very low angle, radiation pattern. Specifications: • Full band coverage on 20 or 17 or 15 or 12 or 10 meters with SWR under 1. Listed under the Antennas/40M/40 meter Delta Loop Antennas category that is about Delta Loop antenna projects for 7 MHz. Dec 12, 2016 · I’ve had QSOs out to over 1,000 miles already using it with good signal reports each way. On 40, the G5RV and the loop are typically neck-and-neck, depending on where the other station is and what the propagation happens to be. I used the following components to build my spiral loop: 25 meters of 0. Confidently, you flip the switch, turning it on and then it happens–the  Coax capacitor jumper also made for 20 meters. Page 3. Dec 07, 2016 · The one I've always wanted to try is a Delta Loop antenna, specifically for 20 meters. The performance of this antenna was absolutely spectacular especially given he was operating QRP. (20 meters through 10 meters), use 450 ohm ladder line, 300 ohm TV twin lead, or homemade 600 ohm twin lead in conjunction with a 4:1 The meter gets all of the power it needs from the 4-20 mA loop and its 1 V (4 V with backlight) drop results in a minimal burden on the loop. 78 m from the top) fed by a quarter wavelength of 75 Ohm cable (3. 2 Meters - Diamond - Base is @ 80 Feet in Pine Tree. The Half Square antenna is a great wire antenna for the DX edge. Now that's stealth! One section of the loop is also barely visible on the left side. 015% of Reading + 0. Such an antenna would, in theory, readily resonate in the 20m band. An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters John DeGood, NU3E nu3e@arrl. I can't say "I love loops" enough. 558 feet minus 22 feet = 536 feet. I replaced that mono-band loop with a nested loop array for the 20, 17, 15, 12, and 10 meter bands. 0. temporary meter loop. Square D Homeline 200 Amp 30-Space 42-Circuit Outdoor Ring-Type Surface Mount Solar-Ready Main Breaker Plug-On Neutral CSED. Mounts on mast from 40 to 50mm, 60mm optional. 64 feet 8. Weight. For this project I started from a Nerio Neri Book "Antenne. 5 to 1 Talented Balun hang-n-go "Meter" - a device for measuring the electric power and energy supplied to a customer. Note that the load resistor, RL, should meter the. I’ve also had a chance to compare the 3 antennas (6BTV Vertical, 88ft Ednfed, 40m Loop) from more local stations in California, Nevada, and Arizona. DESCRIPTION OF K4TX DELTA LOOP. The orig­i­nal Jet­stream Multiband 80 - 10 Dipole nev­er had cov­er­age of th­ese bands. , tune) by simply adjusting the length of the tubular elements. It can be built using the same type of tubing and hardware as the 2-meter antenna. 5 feet (I’d advise making it 16′ even, to ensure the loop is not too long to work well). CM Feed point 0. What is a Meter Loop? A meter loop is the assembly that serves as the path for electrical conduc-tors to securely attach to the house or pole and the electrical meter. 95 - Phased Loop Antenna 87 - Capacity Tuned Folded Loop Antenna for 20m. It is a design that performs well and exhibits low input impedance, making it ideal for use with ham equipment without the need for A 20 meter or smaller full wave loop antenna can even be oriented as a vertical diamond or vertical square. 75 mm 2 insulated wire ("zip wire", AWG 20 or 21, not critical); as suggested by Harry, I split 13 meters of 2x0. Note:- Loops A -E have sides approximately (~) 1/3 wavelength but overall circumference delta loop is the same as an equivalent quad on the same frequency, i. Electrical tape 7. pedernales electric cooperative, inc. TV antenna. 14 one side . Living as I do in a flat with a complete ban on external antennas, I turned to the loop, having for many years experimented with this type of aerial in various forms. Great deals on 20 Meter Antenna. Excellent build quality! Well thought out design. As I promised in my final look at the recently-retired 20 meters delta loop , I am following up with my observations of the antenna's performance on both these other bands. The one advantage I have here is that my take off points around the house are pretty good especially towards Australia and opposite towards the Americas. However, you may find that your mono band delta loop may tune up on it's second harmonic at a higher frequency eg. Balun 2: 1 included. If you decide to feed your loop with coax, I'd suggest using RG-8X or RG-213 and a high power, high performance 1:1 or 4:1 Current-type balun. Maurizio Malaspina - IW6DFW. The SE/NW system has two elements with apex at 58 meters. galloway. SO239, 50Ohm full band coverage. To measure a 4-20 mA loop signal with a process clamp meter: Access the signal wires (typically by 11 Meter Loop Antenna. That length can be divided by 3 for a delta loop or 4 for a quad style loop. 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. All 4 to 20 mA Loop Functions— 0 to 24 mA Source, mA Meter, 2-wire Transmitter Simulator & DC Volt Meter in a single compact unit. ARRL QST May 1968 p49-51 “The Army Loop” where KH Patterson replies” 3. The antenna blends into the surroundings, so I needed the morning sun Custom designed and built 2. KL7JR'S Confined Space Stealthy Loop 6-20M. 95 * Buy It Update: Harold, I put up just the 20 meter loop in a square 10′ off the ground so I can work with it. RSGB Antenna Topics P19-20 An Indoor Loop Antenna for 6m Colen Harlow, G8BTK. A Magnetic loop antenna for 1-5 watts can be made fairly inexpensive. If using insulated wire, shorten the overall length by 4% (-22 feet). 26"H x 1. The meter features a wide -40 to 75°C operating temperature range and is available with a ½" conduit hole in a location of your choice for easy installation. 99 feet 23. The SuperLoop 40™ is a high performance, full size, full-wave, 40 meter loop antenna. 20 Meter. 2" (Antennas. To make a long wire loop, simply double The Square D by Schneider Electric 200 Amp 20-Space 40-Circuit Outdoor Combination meter Socket and Main Breaker Load Center is suitable for use as a combination service entrance device (CSED). 6 MHz, and the 2:1 VSWR bandwidth exceeds this. For electric service at a new location, you will need a meter loop, a conductive wire that connects the meter to your home or business. It is surprisingly how strong the signals on 20 m are with this antenna. 55 = 6. 79 twinlead Quarter wave in space is: 17. 4 meter magnetic loop for 40, 30 and 20 meters with an 11 inch  16 Jan 2010 Feedpoint impedances of the 80 meter loop on different bands. 69"D) is designed to replace our old 590 series meter as well the popular 3. For 160 meters a full wave loop antenna resonant at 1. 00 HF Ham radio SkyLoop antenna 10 meter and 2. The setup has been tweeked and tuned to work on 40 meters, 20 meters, 15 meters, and 10 meters (no tuner should be needed, depending on your rig), and   Fluke 772 Milliamp Process Clamp Meter with Loop Power, 4-20 mA - at the Test Equipment Depot. The Delta Loop array used at my QTH is a simple and inexpensive way to achieve substantial gain and reasonable F/B ratio. The indicator can display the 4 to 20 mA signal as well as up to four HART® values. The formula for the length of wire required to make a one wavelength loop is: L = 1005/f, where L = length in feet, f = frequency in MHz. This is an antenna you might consider if you have limited. 175MHz, and the VSWR is better than 1. DIY Crafts Self Adhesive Hook and Loop Tape, 0. 9 Mhz,  Process control 4–20 mA loops[edit]. 9 Mhz would be about 529 feet long. Section, Drawings TM- 10, TM-20 and TM-30 for acceptable temporary meter panel designs. Somewhat Ground Independent Being a loop, the 3-DFL does not require a counterpoise or a ground connection. 500. OTEK's DCS (3. Look at the "jungle" on right side of picture above the rails. 95 - Phased Loop Antenna I would like to make an ovale loop antenna out of wires going around my sailing boat, as I am bothered with a lot of noise at my QTH (I live in the boat). Half Loop Antenna for the 80-, 40,- 20,- and 15- meter Bands. is a blend of technical expertise and common sense approach to accommodating your needs. electric service temporary overhead. He's Harry Lythall. A fellow ham lives 10 km away from my location and uses a 160 m horizontal loop. Livingston, TX 77351 Telephone: Livingston (936) 327-5711 Coldspring (936) 653-5400 Woodville (936) 283-8251 Toll Free 1-800-458-0381 Currently in stock at over 150 retail stores, we've been building meter loops and meter poles for more than 20 years, with thousands now in use throughout Texas, Louisiana and Arkansas. A "magnetic loop" antenna, so named because it responds primarily to the magnetic rather than electrical component of a radio wave, is a very small (relative to wavelength) single-turn loop tuned to resonance with a series capacitor. I loosely followed Frank,  3 Apr 2012 Here on YouTube. - 20m of RG58 A/U  19 Jan 2020 ANTENTOP- 01- 2012, # 016. 14 Aug 2018 An easy, inexpensive gain antenna that you can build for 20 meters. ) Additional Reading: 4-20 mA Current Loop Data Logger Products 4-20 mA Current Loop Data Acquisition Products. 85457 75 Meter Horizontal Dipole @ 65 Feet. 00. 86` diameter (9`circumfrence) loop for 20 meters with spiral wrapped 3" diameter pool noodles. The Vertical Delta Loop • A three sided loop is known as a Vertical Delta loop sitting on the ground. 5 to 1 Balun with SO239 connector. CM G4EZT Tree supported antenna. 10-80 Meter Alpha Loop, 100W 10-40M, 20W 40-80 magnetic. Reference loop, 40-meter full wave loop 36-feet high over medium soil, opened opposite feedpoint to make reasonable feed impedance on 80 meters. 800 (lowest 160 meter frequency in MHz) = 558 feet. Mike Yamamoto. THE 20 METER MONOBAND DIPOLE THE 10 METER MONOBAND DIPOLE THE 60 AND 30 METER DUAL BAND DIPOLE. MHz feet. The DPM 942-FPSI is a 3 ½ digit LCD current loop meter that can also be used for dual colour go-stop status indication. Five Band Indoor Magnetic Loop Aerial. The loop wins about 90% of the time. Model# SC3042M200PS. This loop is an octogone in copper tubing of 22 mm diameter equipped with a split stator variable capacitor. Switching from 3 antennas made a very strong comparison that the loop was the better antenna by far. 9 out of 5 stars 7. 8 - Other protection methods · 5. 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. Copper pipe sanding material 9. 80. One should also know how to use the DVM. 20 Meter Half Wave Dipole Antenna with W2FMI 1500 Watt Balun. 99 SBL-40 40 Meter Loop - $ 74. The Fluke 771 delivers all the basics. com/data/meters/dms-an20. 4-20 mA Loop Powered Backlight LCD Indicator (48x96mm). Razor blade 6. & Can be disguised as. Indoor Dipole Antenna for 20 Meter. The DPF301 Series comprises 4 to 20 mA loop-powered panel-mount indicators that display process variables in engineering units (GPM, LPM, psig, %RH, etc. By popular demand we bring back the old "590" but with New Patented Technology so you can replace the old needle, fragile and inaccurate 19th Century Technology analog meters without changing your panel or wiring. 5:1. This allows the antenna to be lowered and adjusted for maintenance and tuning. HomerBB Sr. Portable Magnetic Loop Antennas Sample Project—Doomsday Loop High Power Loop 15 and 20 Meter Coverage. The matching capacitor is a fixed 18 pF in parallel with a 10 pF trimmer. McCoy, W1ICP "The Army Loop in Ham Communications" 2. Ham. The useable bandwidth is just a little narrower than I would have wished, but the antenna certainly works well and meets all the other criteria. Jan 16, 2020 · Delta loop Antenna. It seems the more I use them the more amazed I am! Hint. The boom is near the top of the 15/10M tower. Construction Info For 30-Meter Magnetic Loop Antenna . 060 Mhz 41. It consists of the weatherhead, the service mast or riser, and the meter enclosure. 10 Meter Antennas QRP MAG LOOP TUNER (80 –20m) – G8ODE Background to the US ARMY LOOP references. Locate the mA signal and  Portable. This unit is ANSI certified and UL listed with a maximum 10,000 AIR. 8dB gain over a 1/2-wave dipole. 20 Meter Circular Magnetic Loop by. 3 MHz) 10 meters ( +/- 28. Finished 20 thru 10 meter loop …. Delta Loop for HF – W5SDC The dipole worked pretty well as most resonant antennas do however, after. Delta Loop for 40- and 20- meter Band: By: Nikolay Kudryavchenko, UR0GT. drawn: approved: date: revadate revisionissue for construction byrwcchkmmgaprmmg. 40 Meter 2 Element Parasitic Delta Loop - Switchable NE/SW - @ 60 Feet In Pine Trees. The length of wire used in a delta loop antenna is determined using 1005/[frequency in Mhz. S. ), with an adjustable decimal point for rate and total display. 30 May 2018 This arrangement works very well for QRP, where the average RF power is about 5 Watts or less. µSiemens) Boundary Circular F 14. QST April 2002, pp. Turns are counted by the number of times the wire passes through the toroid center. A horizontal loop (fig a) with a circumference of approximately 84 m is a good "all round" antenna for 10–80 m. QST November 1985, pp. 50 Amp (14-50R), 30 Amp (TT30R) and 20 Amp GFCI Weather Resistant Receptacle (5-20R2GFI) 3/4", 1" and 1. Fullwave delta loop is:  17 Aug 2013 I finally freed up a few uninterrupted hours during calm, clear weather to install the 20 meters delta loop (described and shown on the ground  8 Jan 2019 To get multiband performance (20 meters through 10 meters), use 450 ohm ladder line, 300 ohm TV twin lead, or homemade 600 ohm twin  A 10-20 meters coverage delta loop antenna by DL2HCB; 20m delta loop 40 Meter 2 element full size parasitic delta loop wire beam construction and  Loop antennas may be constructed in many forms including horizontal full wave with omni-directional radiation and significant gain on the 20-10 meter bands. A year later, I started phase-two. On 17, the loop is stellar. 5m long) which is connected to a 50 Ohm cable coax into the ATU A full-size Delta Loop, fed in the bottom corner, is a good low angle radiator and is great for working DX. Length meters. 7λ. 00 · All Antennas, Magnetic Loops, Portable · Add to cart · Sale! tion and/or typical wiring diagrams for Murata Power Solutions' 4-20mA loop- subsection of a panel meter or data acquisition system, converts the 4-20mA. 80 cm diameter loop for 20 to 10 meter bands. To enable inserting a loop of wire for tuning purposes. 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. 04|17. Silver Solder 3. Starting from the beginning of this quest to eventually feed with LL, it is fed with 20′ of RG-58 and an air core balun 1:1 is at the fp of this folded dipole of # 16 speaker wire. At 15° it is 5. A bidirectional,40 meter 2-element Delta Loop array made from wire and coax provides a better way to snare some DX at modest cost. More Options Available. 005 mA from 4 to 20 mA. Thus to make a long wire loop for, say, 10 meters, one could erect a one-wavelength loop cut for 20 meters. Church St. HRO Discount Price: $249. rwc mmg. 4-20mA current loop is most common and widely used communication method in an industrial environment. The other side of the SO-239 is attached Meter Loops. The 4/20mA signal can represent anything, and be scaled to any range of that quantity. 4 MHz) The sloping loop's radiation pattern will become split in an ever increasing number of side lobes (of lesser amplitude) as you use the antenna on higher frequency bands. 93 - Picnic Vertical Wire Antenna. 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. (BTW: a quarter wavelength is 1/4 of that result) Notice I inserted an additional insulator in the horizontal leg, near one corner. 5 barrel analog meters. 32 foot 20 Meter Delta Loop Antenna. ) the bottom-fed quad loop is a very good choice for the 20-10M bands. 45 coax|30. All Antennas, Magnetic Loops, Portable You are now the proud owner of a Comtek 20 Meter Vertical Antenna. The inspiration for the project came from these two web sites:  4 Dec 2019 Very detailed on the calculations. Showing the evolution of analogue control loop signalling  20 meters and above or 80 meters and above Omni- directional. Our products are proudly built in our modern facility using quality components from leading suppliers like Eaton/Cutler Hammer, Madison, Topaz, Halex and Milbank. This aerial covers the 20, 17, 15, 12 and 10 metre bands and is made from a single 3 metre length of 22 mm copper tube cut into 4 pieces of equal length and joined in the corners with 90 degree elbows. Jual Kain perekat Magic tape HALUS SAJA (Loop) 5cm @20 meter warna PUTIH dengan harga Rp15. longer ranges, however, the noise might be heard only at HF. Two 160 pF capacitors are used for 20 metres, giving an equivalent capacitance of 80 pF. The 20 meter vertical loop antenna will get you around the world if the conditions allow it. Should play well for years. M2 Antenna Systems, Inc. 99 SBL-20 20 Meter Loop - $ 54. In practice it may be even higher. Furthest contact was Europe to New Zealand with 1 watt at each end and both stations running 1 The functions of an advanced loop calibrator allow technicians to troubleshoot on the spot without disconnecting wires or “breaking the loop. 5m long) which is connected to a 50 Ohm cable coax into the ATU PAR Electronics, Inc. Trim the wire ends to extend about 1. • 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) Loop: To determine the approximate length in feet of a Full Wave Loop antenna use the formula 1005/Freq in Mhz = length in feet. The basic layout of the 20 Meter Delta loop, each side is 7. 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. Other loops just can’t take the power that is often needed to break through or ‘make the trip’, but For our purposes, we will limit this discussion to two configurations, both optimized for certain HF bands. 3 - Earth fault loop impedance, 5. We have over 32 years of experience designing and building antennas and systems to satisfy the ever expending communications needs. I highly recommend the 20 meter delta loop antenna if you’re set up for it. The circumference of a true magnetic loop should be less than 1/10th wavelength and the coupling loop at 1/5 ratio to the main loop. According to the above link, the circumference of the loop must not exceed 16. In stock (5 items available). 85 would be about 261 feet long. I may try a 40 meter loop in the future. Antenna has good SWR on both 40 and 20- meter Bands. 5:1 • No Tuner needed • Bandwidth: Over 750 kHz 20 Meter Wire Antenna Sizes. the loop size in the calculator to get the best efficiency possible in your favorite band. 22. temporary loop. 5 - Resistance per metre of copper conductors at 20°C for Use of 4-mA to 20-mA (4−20 mA) current loops has become the standard in the process-control industry http://www. On 20 meters the SuperLoop 40™ coverts itself into a 2 wavelength open loop or Bi-Square. (See definitions for CLOSED LOOP and JUMPERED). The inspiration for the project came from these two web sites: https://rsars. 14. 586 Mhz 3rd Harmonic Halfwave in space is: 34. 0. One vertical element (1/4-wave) is fed at the top where it is attached to a SO-239. 160 m loop on 80, 80 m loop on 40, 20 m loop on 10, etc. loop  13 Oct 2017 Imagine this: You've got your flow meter with 4-20mA output setup. 20. Remember, the formula for calculating the overall length of the loop (in ft. The inverted- Frequency. It shall be easy to adjust (i . 17 meters, 280 +j109  Delta Loop for 40- and 20- meter Εξοπλισμός Επιβίωσης, Συγκροτήματα 40 Meter Delta Loop Antenna delta loop antenna project for the 40 meters band,  The hohpl--horizontally oriented and polarized loop. 5" knockouts standard Loop feed lugs on all pedestals up to 350 MCM wire. I therefore expected reasonable performance in regard to antenna losses and pattern. It has the highest gain at low take-off angles, and the horizontal polarization is great for these frequencies. Any antenna tuned for 80 Meters should also work on 20 and 10 meters as well. The antenna exhibits modest gain and can be vertically polarized by feeding the antenna at the bottom. 50 feet 11. 40 twinlead Quarter wave Vertical is: 16. Reflector|Director: 76. Motor Starting Requirements – Above 20 Horsepower to 100 . "Meter Sockets" - a meter socket is the base portion of a socket type meter. SKU. 64 foot ground plane Three Quarter wave Vertical: 51. Finally, on the top in picture shown above, is welded a variable tuning capacitor, a butterfly capacitor (it's important to avoid sliding contacts in the perspective to use an ATU in the future, to avoid sparks due to the high voltage generated). com/NG9D we spend a lot of time fiddling around with low power (QRP) radio transmitters, simple receivers, home-made  30 May 2018 In particular, we both were impressed with Harry's 20 Meter Loop Antenna–it's such a simple project and requires no special order components. Winda area: 025m2 – max wind 130Km. Details Select detail CARNIVAL RIDES CLASS 1,2,3 OF ARTICLE 500 EA COMMERCIAL/INDUSTRIAL REPAIR CTRLS/LOW VOLTAGE SYS > 50 V DISTR GENERATION 1-5 KW DISTR GENERATION 51-300 KW DISTR GENERATION 6-50 KW DISTR GENERATION OVER 300 KW FESTIVAL BOOTHS FLUR. Mobile loop antenna (source: unknown) CONSTRUCTION. I haven't tried the 40 meter Delta Loop with the  Description. See Fig­ure 8 for the SWR curves. 20 METER GROUNDPLANE Most hams are familiar with the quarter wavelength ground-plane antenna design. 7 feet. Design and Building - Vol. MHz feet meters. It has none pronounced DX or local radiation pattern. On the air comparisons with my low Yagi confirmed instantly that this design was a hands-down winner for working both local and distant stations. 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 A loop fed in the southwest corner will have a few dB (3dB or more) gain favoring the northeast corner. this wire antenna for 40 and 20 meter band feature a good swr horizontal side of the antenna is placed at two meters above the ground impedance of the antenna are depending by the height of the base from the ground and conditions of the ground. and Europe with this antenna. We have two delta-loop antennas systems for 80 meters. 002 mA) Accurate to 0. #8 BJ radionut, Nov 20, 2010. 1/8 Build a Multi-Band Mono Delta Loop For 40, 30, 20 and 15 Meters. 31 /F(MHz) metres. Jul 24, 2015 · My BIG loop was designed with a maximum frequency just above the 20 meter band. 2). 546 feet • 30 meters 97. ) •3. It exhibits 1. 23. This is a little long for 80, 17 and 12 meters, but a little short for 40 and 30 meters and just right for 20, 15 and 10 meters. If you exceed this power level, then the  20 Meter Wire Antenna Sizes. An on-chip standard ranges: 4– 20mA, 12 ± 8 mA and 0–20 mA. I put up another se­parate du­al band an­ten­na for the new bands, now that I had a rig (FT-950) that cov­ered them. Reading 4-20mA current loop sensors using Arduino is much easier than you might think. 5”, and carefully It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands" See All Details : The 10/15/20 Meter Trap Vertical Antenna This antenna project came out very nice. 185 feet • 40 meters 140. The height isn’t all that great either. L-Vertical Antenna for Nearest Objects for The 40- and 20- meter Bands. 99 SBL-60 60 Meter Loop - $ 89. 16 kg. ” Multifunction process calibrators can also be used to test 4-20mA loops as well as digital controls. Some plumbing skills are required here as you will need to use a blow torch with plumbers solder paste Mar 17, 2019 · [Eric]’s build is designed to operate at 100W on the 20 meter band, and this influences the specifications of the antenna. page 2 of 2. A dipole design for the 20-meter band is an Mar 22, 2019 · 1 thought on “ Building a 20 meter self-tuning magnetic loop antenna ” Pingback: OTA: LimeSNA, QO-100 Projects, a Self-Tuning Antenna, and More – MyriadRF Leave a Reply Cancel reply Mar 22, 2019 · 1 thought on “ Building a 20 meter self-tuning magnetic loop antenna ” Pingback: OTA: LimeSNA, QO-100 Projects, a Self-Tuning Antenna, and More – MyriadRF Leave a Reply Cancel reply METER LOOP SPECIFICATIONS FOR SINGLE PHASE SERVICE (Effective June 1, 2010) As required by: Sam Houston Electric Cooperative, Inc. Particularly critical in  The sky loop is a full wave wire antenna using #14 or #12 wire. The diagram above depicts the and meter delta loops setup at my QTH. ian, Louie/4F1AAZ, who passed away many 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. Scale it to 40 meters for more fun! 24 Sep 2017 NOTE: SM0VPO is not Richard. 60 foot ground radials Five eights wave Vertical is: 43. The formulas for calculating the length of an impedance matching section are: Quarter-wave matching section length  My one-meter Mag Loop with an 8-118pf variable capacitor that requires an SWR traces of a 1. Torch for soldering plumbing 2. May 30, 2018 · The centre frequency of my 20m Loop antenna is 14. 800 (lowest 160 meter at very low height (as low as 10 to 20 feet above the ground) it can be very effective. A few days ago, SWLing Post contributor, Robert Gulley (AK3Q) , pointed me to an excellent website by Harry Lythall (SM0VPO ) which is chock-full of various homebrew radio projects. Issue, 56 February 1998. ) is: L = 1005/f (where f is frequency in MHz). Progettazione e Costruzione - Vol. I needed a better antenna. 5 to 1 balun hang-n-go $ 130. If we have a loop like this with a high feedpoint resistance, over 10-20 ohms, the antenna has very high loss. Kenneth Harris on 13th Sep 2017. In the case of the five-band, 20- through 10-meter quad, the driven and reflector arms each support five concentric wire loops. 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. It is an ideal method of transferring process information because current does not change as it travels from transmitter to receiver. It seems that at least one 4-20 mA (milliamp) measurement is required by our typical customer, and the way to do it is a constant source of confusion for many. The Q-factor is somewhere approaching 100. Input impedances of the antenna on both bands depend on distance above the ground and condition of the ground May 08, 2011 · Hi Jess, The large horizontal Loop has been my ONLY choice for HF wire antennas for the last 20 years. Model# SC2040M200C. This has 4 x sloping radials at 45 degrees with a feedpojnt up at about 7 meters in the air. This is over 10,000 miles. Field Day in  Full-wave in meters = 306 / frequency in MHz. 20 Meter CW Center Frequency: 14. standard 4–20 mA, two-wire current loop. Severe changes in the electrical loop may inhibit HART® Communication or To perform a scaled 4-20 mA output trim, connect an accurate reference meter to . The publication is devoted to the memory of  20 meter delta loop. This represents a difference of about 6dB or 1 S-Unit. KI6OID apex down Delta Loop. 17 ] 40 thru 10 Meter Zepp Antenna pop - A modified 20 meter double zepp wire Operating Bands: 40 thru 10 meters (with tuner), basic construction and Aug 20, 2013 · For comparison, the 20 meters broadside pattern of the TH1vn up 10. michelle m. 64 feet 19. 20 through 10 meters, then this is the project for you. Delta Loop. Geri Ham radio. Clearly the best all-band wire antenna that also has gain as you operate above the band that it is cut for, and they are quiet antennas against QRM like power line noise. Antenna placed on distance 2- meter above real ground. In the. When cutting wire to make the Antenna, always add some for final tuning and the physical attachment on insulators Square D Homeline 200 Amp 20-Space 40-Circuit Outdoor Ring Type Overhead/Underground Main Breaker CSED with Kit. 70. 40 mtr MFJ1780 14-30 MHz Loop. In a 4-20mA current loop, all the signalling current flows through all devices. You may either purchase the meter loop from Bluebonnet or provide your own. The following are the five discrete parts to the “loop” (see the image represented above): 40 Meter Parasitic Delta Loop Array Wire Diagram Wires 1, 2, and 3 represent the driven loop element. This is an easy antenna to build and the materials cost about $15-20. 40 Meter Delta Loop - A multi band delta loop antenna that work on 20 and 40 meters band, that can be used either on 15 meters with poor performances [ Hits: 2477 | Votes: 6 | Rating: 8. The loop antenna will be about 20-25 meters long, and situated about 1,5 meters above the water. 5 meter models with a maximum gain that is 7. If we make the loop much longer or shorter, we would end up with the antenna being unsuitable for some of the bands. 20 meter band square loop antenna. 8. Nonetheless, you will be W2BRI - An Easy Guide to How to Build Your Own Magnetic Loop Page 3 of 19 Tools You'll Need: 1. net Abstract A coaxial-cable trap dipole antenna installed in the attic provides a surprisingly effective solution to HF operation on the 10, 15, 20, 30, 40, and 80 meter amateur bands at a QTH with restrictive covenants that prohibit outside antennas. Off the ends it is a vertical radiator with a gain of -3 dbi at 30° elevation. Measure the amperage in series (a wire on one of the terminals is disconnected to insert the meter leads between the terminal and wire). 1 dbi, which is 4 db greater than the delta loop. I am very satisfied with the outcome. 39 feet 16. ) 87 - Capacity Tuned Folded Loop Antenna for 20m. 99 SBL-30 30 Meter Loop - $ 69. They are relatively close most of the time on 20 but the loop is usually the better performer. The Delta Loop is not only a great transmitting antenna but a low noise receiving antenna. Be prepared and able to communicate in case of emergency with the largest selection at eBay. 008 thick (8 mils), Soft anneal. Radioteletype is used frequently on this band as well. Gamma Match – 20 thru 10 meter loop. 25 lambda from top corner for vertical polarisation CM 2:1 75 ohm coax quarter wave-length match assumed. The Alpha Loop offers you a light 10-40 Meter transmit/receive magnetic loop antenna that is quick to deploy. A circular loop is ideal, but squares, triangles, and other shapes can work well; just make the area enclosed by the loop as big as you can. 405”diam. Boom length: about 7m, projection on the ground 4m per arm. Early in 2004 I had started working on 20 meter PSK31 WAS and was not happy with the 20 meter dipole. This antenna may be built as a 20 meter, 17 meter, 15 meter, 12 meter or 10 meter monoband vertical antenna. 72 coax|15. You can use a full-wave loop on frequencies higher than design frequency as well (for example, using a 7 MHz loop on 21 MHz), but the pattern will be different. Dec 06, 2018 · Keep in mind that an air gap of 1mm equates to a breakdown voltage of about 1KV, which can be encountered when as little as 20 watts is used. The 6m 20" high Loop. (A vertically oriented horizontally polarized one-wavelength loop with the bottom of at 1/2 wave length above ground is a really fine antenna. The NE/SW system has two elements with apex at 92 meters, above two elements with apex at 46 meters. Address: P. wordpr 20 Meter Circular Magnetic Loop by IW6DFW. Maybe I'll get  7 Dec 2016 However, I'm getting itchy feet to try another antenna. References :-1. It's too hot outside to work very long, but I have me 20m loop antenna mounted. HF Ham radio Sky Loop 80 40 20 15 and 10 meters and 2. Twenty meters designates the length of the particular radio wave used to transmit and receive voice and Morse code. The 4-20 mA current loop is the prevailing process control signal in many industries. The book describes the building of a HF three bands (10-15-20) aluminium delta loop, but I limited the design to 20m band only. Conclusions: > The 40 meter array is fun to use and is a worthwhile antenna on 40 meters especially for DX. Observation 2 – Another member has a full wave loop 50 feet above ground. It measures 4-20 mA signals without "breaking the loop", allowing you to measure low level dc current while saving downtime and money. Resonance is obtained by changing the fixed capacitors and  12 Jul 2019 A 20-Meter Loop Antenna On A Raleigh Tristar. Box 1121 1157 E. The 40 meter (7. There CUSHCRAFT ASQ-20 20 Meter Squalo Omnidirectional 14 MHz Antenna 100 Inches Square 100 Watts SO239. "Meter Enclosure" - a wood or metal cabinet, or metal socket, installed indoors or outdoors, in which the Company's metering equipment is located. Fullwave quad loop is: 72. 4. Bandwidth, SWR, and impedance of an antenna systems says little or nothing about the antenna's efficiency. in: Home & Kitchen. pdf. Aug 20, 2018 · The Conejo Valley Amateur Radio Club was looking for project ideas for the members. 5. 20 mtr. 546. This would give you the effect of a two-element beam (radiator and reflector) on 10 and 20 meters, without affecting 40-meter Mar 17, 2017 · Another antenna placed about 20 feet above ground worked very well and helped him score a Single-Operator unlimited-power plaque with just low power. 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. Complete magneticloop frequentie 10 t/m 20 meter (300 watt max), inclusief controlerkastje (diameter van de loop is +/_ 70 cm) loop is gemaakt van 7/8 coaxiaal  Example : For a 160 meter loop, 1005 divided by 1. It worked! Band-changing from 80m to 40m was a nightmare 20 Meter Loop mostly based on W2BRI's Magnetic Loop Site See Bibliography for other credits As Built By Jim KB2EZN and Dick K2LJZ Materials: 20’ ¾ “ m copper pipe 6’ 1” pvc pipe 3’ ¾” pvc pipe 8 ¾” 45° slip elbows 20” ¼” copper tubing for gamma match 1 1” pvc cross 1 ¾” pvc tee 1 3/4X1” reducing bushing 1 1” coupling Small transmitting loop antennas, commonly called "magnetic loops" or "mag loops," can give surprisingly good performance when they are carefully designed and constructed. (0. Sep 20, 2017 · Reading 4-20mA Current Loop Sensors using Arduino. 5kW capable MFJ antenna tuner •Shielded coupling loop (RG-8X) for noise immunity Test the 4-20 mA loop at the full range of conditions for the process. • 20 meters 70. O Box 645 Glenville, NC 28736 Voice: 828-743-1338 Fax: 866-304-8479 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. So, HF RDF to get you To troubleshoot a 4/20mA loop electrically, one must use a Digital Volt Meter. Current loops are ideal for data transmission because of their inherent insensitivity to electrical noise. 8 out of 5 by 6. It is also much simpler and cost effective. The loop is also much quieter than a… 20 Meter Loop • My next attempt was a 2. Very small. Besides the usual sources, a suitable DVM can be found in the hardware stores, auto parts stores, and department stores. challenge. HB9MTN MAGNETIC LOOP FOR 80M - 40M. Jose I. 75 mm 2 household hook-up wire (zip wire), and made a 26 m wire out of it. 12m) •high power tuning capacitor taken from a 1. 20 thru 10 meter loop under construction, this one will be painted after finished . Parts list . Just needs paint. The setup has been tweeked and tuned to work on 40 meters, 20 meters, 15 meters, and 10 meters (no tuner should be needed, depending on your rig), and 80m, 12m, 17m, and 6 meters using a tuner. $500. Click Here to see more on transmitting Loop Antennas from AA5TB 20 meter quarter-wave vertical antenna experiment Not content with attempting to understand and build 40 and 80 meter verticals, I’ve decided to build a 20 meter version tonight. Band, Low edge 20 meters, 220 -j86, 229 -j8, 246 +j75. > Performance on other bands when feeding both loops in phase is acceptable but typically down 8 - 12 db from the 10-80 meter multi-band loop. Fast & Free shipping on many items! In other words to increase radiation resistance, the loop has to be made spatially larger. I selected a length of 16. This enables the Alpha Loop to be heard and be more Effective than any other manufactured loop. The one I've always wanted to try is a Delta Loop antenna, specifically for 20 meters. Screwdriver 5. This was for two purposes: 1. Two quad designs are described Antenna analyzers only inject a very small amount of power into the antenna system - nowhere near enough to excite effects that normal operating power may, such as saturation in balun or unun transformers, or heating of transformer cores. 55 feet 18. Tuned Loop Antenna – 20 through 10 meters - Revised: 2015-11-06 At K0MPH, a tuned loop antenna is used on the 20, 15 and 10 meter bands. 4 - Protective conductors Table 5. 200 #1 Falcon 20 Meter 1/2 Wave Dipole Amateur Ham Radio Base Station Antenna 50ft Rg8x Coax UHF (Pl259) Male/male 50 Ohm Antenna Cable MFJ-1778 G5RV Wire Antenna 80-10 Meters - Authorized Dealer 4-20 mA Current Loops Overview. Copper foil/flashing: 3 inches wide X . I was inspired by George Badger, February 2008 QST - “The W6TC DX Loop”, and Les Moxon, “HF Antennas for all locations”, to create the loop in a space between two trees in my yard. 20 meter loop

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