80 Meter Loop Antenna

C1 100-pF, 2-kV variable capacitor with ceramic end plates and silver-plated fins, eg. As for 160 meters, consider it lost. Each antenna is installed and tuned to give a 1. 66 in total. Condition is "New". I have built dozens of them, and continue to model, test and research more variations of them. Chuck Robinson. So our antenna wire is 211 feet and the 450 ohm stub is 32 feet long. You will need to plug in the optional external 80 and 60-meter resonator. With active antenna the signal to noise ratio or signal to interference ratio was much better, listen to MP3 files in this article. Magnetic loop antennas – m0ukd – amateur radio blog. -- Read more --80 Meter Frame Antenna. With the short wavelength and height needed on 6 meters, this is a great band for experimenting. Another item on this website discussed antennas that amateurs use to operate from confined locations. Antenna delta loop 6 metri 50 MHz, IZ7CFF Delta Loop, has a value of about 125 ohms, while its gain is about 1. Thank You & 73 VE3UK, W. For the 80 meter band a full wave loop antenna resonant at 3. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. 14-30 MHz Portable Box Fan Loop Antenna MFJ-1786. Fig 2—Typical N6LF broadband symmetrical half-square for 80 meters. I started acquiring specialty PVC fittings and used them to build a Ham radio antenna called a Two Element Cubical Quad 10 or 11 meter beam. The 80m loop happens to work on 30m band too. The loop is no longeroperating in the mode of a magnetic loop. Square meters listed as SQM. The background noise was considerably reduced. Feb 3, 2015 - Creative Science Centre,Univeristy of Sussex. So our antenna wire is 211 feet and the 450 ohm stub is 32 feet long. The real 80 meter horizontal loop antenna at K0ZE is roughly square with the corners at 30-35 feet above the ground. My 160-meter loop allows me to both receive and transmit from the 160-meter band to 10 meters. Small transmitting loop calculators – a comparison – owenduffy. 53 dBi 63 –j74 vs 7. 947 feet Lengths above are in feet and inches. I climb the fence to get to work on the 80 meter array. 6 Meter Quad Antenna. The distance between one point to another adjacent point in a wave is known as the wavelength. Feedback QST May 1996, p. Yaesu G-2800 DXC rotor. Cover as much area as possible. net or Phone#: (352) 797-6062. a big asset for DX to the club. The following photos show a Magnetic Loop Antenna that is a complete lash-up in terms of the mechanical construction yet it is giving some surprising results. It no longer has a null pattern on this band. 10-80 Meter Alpha Loop Antenna The Alpha Loop lets me get on HF from my apartment. This idea was attractive to me since I have no antenna for 80 meters at present. 1,010 likes · 1 talking about this. G3-144 Vertical 2 Meter : MFJ: MFJ-1625 Window/Balcony Antenna 80-6 Meters: Surmen: SX- 3 Vertical 2M/440 : SX- 5 Vertical 2M/440 : SX-20 Vertical 2M/440 : Coax-Seal: Coax-Seal : Please also see: Amateur Wire Antennas: Amateur Mobile Antennas: HT/Portable Antennas: Antenna Construction Supplies: Discontinued Base Antennas: Antenna Safety: Tips. van 80 t/m 20 meter. Below is a diagram and some construction details. The random wire antenna is probably one of the least expensive, easiest and cheapest HF antennas to use if you have a tuner and you want to get the "most" out of a length of "random" wire without having to pull out that calculator, doing the math, getting the center insulator built or bought, running the feedline, and all the rest that goes with putting up a more elaborate antenna. When coupling two antennas always keep the connection cable running from each antenna to the coupler the SAME length. I started by building a 40 Meter 1/4 wave vertical using aluminum tubing, then I made a second one to Phase with the first one. I recently started using my horizontal loop that is about a full wavelength on 80, for 20 meters. I tried an 80 meter dipole here for awhile, but wanted to go to other bands as well. Formula Dipole total Length = Amount / frequency Each leg of the dipole = Dipole Total Length / 2 Inverted Vees total length = ( Amount / Frequency ) * Percent Each leg of the Inverted Vee = Inverted Vees total length / 2 Where, Full Wave = 984 Half Wave = 468 Quarter Wave = 234 This tool will help you dynamically to calculate the total length of a dipole inverted V antenna. 8: A502HB: 6 meter. Today I got my 80 M inverted vee back up from having the house painted and it definitely hears better than the horizontal loop I've been using. The input signal level is very low, but with good S/N ratio. Watch the following video to see how to build and erect a basic 80-meter NVIS antenna. Chuck Robinson. Alpha QRP Loop Antenna Antenna pdf manual download. Knowing what I know now, I probably would have cut the wire for 560' feet to make the upper bands work better and kept an eye on the tuner to make sure it wasn't getting hot - the only reason I would have done this is laziness so I wouldn't have to bother with splicing more wire. For that result I kick myself because I really wanted this to work at 80 meters! It is a superb antenna for 160 meters. similar to the regular loop antenna, just a big large random length of wire in the shape of a loop running either as high as possible or low along the ground for the lower bands. 2m Ka RxTx Class I. All antenna solutions are handmade, home brew and monoband. pdf - Google Drive Sign in. Cubex Quad 2 elements 10-12-15-17-20 meter. 66' 15, 17, 20, 30, 40, 60 meters 88' 20, 30, 40, 60, 80 meters The chief advantage of the broadside doublet is that you always know the directions of your radiation or your most sensitive reception. the loop size in the calculator to get the best efficiency possible in your favorite band. Rotable 160/80m coax loop antenna on a CD-45 rotor with the bottom of the loop about at about 12 feet above ground which clears my ranch home. Power usage +13. 3 MHz) 10 meters ( +/- 28. 42 51 –j86 20 meter 8. Designed as a 20m antenna. This ham radio coil-loaded 40 and 80 meter inverted V dipole HF wire antenna is easy to build! Loading coils make this antenna a full size on 40 meters and a… Video Rating: 4 / 5. x) for coverage of 10-80 Meters handles 100 Watts PEP SSB on 10-40 Meters and 20W PEP SSB on 40/60/80 Meters when the included Booster Cable is installed. This loop antenna needs to be run in the horizontal plane. 08 in) All stainless steel hardware, including the axis Diameter 2m (78. Small Coaxial Loop tuned for specific band. spacing and a switch to put the loop's in parallel or in series, the antenna becomes a 80-10 m. Total Wire Optimum Number Optimum Length Peak Gain Length (ft) of Radials of Radials (ft) (dBi) 250 14 – 16 17. The Quadrifilar Helix as a 2 Meter Base Station Antenna 3. PVC Ham Radio Antenna "The picture is an Amateur (Ham) Radio antenna that is about 90 percent PVC pipe and fittings. It tunes 160 through 6 meters with the Flex-3000 tuner. Custom RF design for HOA and XYL approval. My longest-distance contact on the band was only about 1100 miles away. Square meters listed as SQM. This is the Spi-Ro LC-80 antenna shortener. For decades, the Johnson Matchbox has been the standard of comparison for balanced line tuners. Meine Magnetic-Loop mit zwei Windungen für 80 und 40 Meter - QRP magnetic loop by KR1ST; PA3CQR Magnetic loop antenna page - Portable HF Transmitting Loop Antenna - Practical Experiments with Magnetic Loop Antennas - Small loop antennas (magnetic loops) - Stealth ST-940B Mobile HF NVIS Magnetic Loop Antenna - The G3BGR Magnetic Loop - THE. In the article below, I’d like to describe the theory and the mechanical build process for a 160m-long multiband loop antenna, including its support system, tuning, and SWR analysis. The 4:1 balun was chosen because the impedance of the feedpoint of the antenna for each band is: 80 meters 133-j50; 40 meters 272-j105; 20 meters 279-j80; Since you specified that you need to run coax into your shack, it is best to transform the impedance at the antenna in this case and run coax all the way into the shack. 185 feet • 40 meters 140. For transatlantic or transpacific contacts, the Lazy Loop was equally as strong as the directional antennas which were also mounted at 10m (33') height. The PI4DX contest station is a normal house with quite some space arround it and 3 towers with antenna installations. This article provides details needed to build your own. The 80-Meter Spiral Miniloop This loop incorporates an amalgam of the best technical features from many experiments, plus some new ideas. The pattern looks not too bad, considering that the antenna apex is up less than λ/4 at 3. 5000 - 1660. Small magnetic receiving loops. The G4ILO Wonder Loop is an inexpensive, easy to make magnetic loop antenna that covers five HF bands, 40m through 15m. RDF Up to 13. Half way there is another 80 meter coax trap. Great for digital. 99 List List Price $12. Acceuil > Car accessories > Meter of vehicle >. AM frequencies and 160 or 80-meter ham bands) with an antenna well cut at 1/4 l, what means 40m long on 1. The HF Traveling Wave Dipole Antenna is efficient for short more HF Delta Antenna D230/330. 5 MHz to 29. 44kg (my multi-band EFHW antenna weighs 1. The travelloop was born HI. This was created as a fun project to demonstrate how to enjoy operating HF in the field with a home-made portable antenna without spending a ton of money. My 160-meter loop allows me to both receive and transmit from the 160-meter band to 10 meters. (13-AWG) wire wound on an Amidon T-400-3 Toroid. 80 MHz antenna VSWR 1. The antenna on 40 M is a rotatable dipole up about 45 feet. A full wave for 3. L1 = 30 uH, 35 turns of 2. Small Coaxial Loop tuned for specific band. Write or call 435-200-4902. Since its inception in 1948, various Harvard departments and private benefactors have added material to the original nucleus of the Collection of Historical Scientific Instruments (CHSI), which now contains over 20,000 objects dating from about 1400 to the …. The main category is Resonant Loop Antennas that is about Resonant Loop Antennas. The RADIO WORKS' SuperLoop 80™ is a high performance, full size, full-wave, 80 meter loop antenna. 5 meters Andrew ESA45-46A Digital various FEC, data rates and modulation 3700. By hanging it only 15 feet (4. The goals of the project were to provide an optimized antenna for 40m, 80m, 20m, and all other HF ham bands, in that order of priority. See full list on n1su. On 40 meters the SuperLoop 80™ is a 2 wavelength open loop or Bi-Square. The top was 17 meters over ground, and the two other ends some three meters over ground. Simple wire antennas are quite allright, but using them to do well in a contest is pretty hard. Made out of aluminum tubing Uses PVC as an insulator Is 32 feet high. Note, I built mine into an old modified MFJ945e antenna tuner with built in cross needle SWR meter. Resource features Indian amateur news, photos, circuits, articles, downloads, message boards and discussion forums. The 6 meter J-Pole antenna is shipped UPS Ground in a sturdy box. 34 feet (211 feet is close enough). AM frequencies and 160 or 80-meter ham bands) with an antenna well cut at 1/4 l, what means 40m long on 1. This was created as a fun project to demonstrate how to enjoy operating HF in the field with a home-made portable antenna without spending a ton of money. The electrical circumference is approaching 1/2 wave length. But none of them were really that much more effective than a plain inverted V at 150’. 160/80/40/30m Alpha Delta DX-B Slopper with one 1/4 wave 160m ground radial used for transmit and receive at times that is moved between SE, N, SW to provide coverage of parts of South America through. Just what I would expect to see for a loop cut to be resonant in the middle of the 80 meter band. K4TR WIRE ANTENNA MFG AND SALES "Your Virtual Mail Order Store" Joseph Dube K4TR 830 Darby Lane Brooksville Fl. Noise is a big problem around my QTH. It will be turned using a Yeasu G-1000 rotator with a K3NG controller. I create a two turn outer loop to get down to 160 and it works very well. Note : This function applies to far-field calculations only (d > l /2 p ). 5 MHz to 29. Most antenna modeling programs have extensive libraries of standard antenna designs to choose from, so #1 above is not so bad. The Group moderators are responsible for maintaining their community and can address these issues. Marris, G2BZQ See Feedback, May 1996 QST for corrections to this article. If you can manage it, use a balanced, center fed antenna, it is the easiest to deal with and will result in less RF-in-the-shack. A wide variety of magnetic loop antenna options are available to you. External antenna for the GPS-38, Magellan 2000, or Eagle Explorer GPS receivers AM Broadcast Band Active Antenna Active antenna with gain. The antenna is symmetrical and closed so that in many cases the reception will be quieter compared to asymmetrical or open antennas. The venerable loop is easy for your tuner to match, even when fed with coax. The stub in the top leg of the antenna opens the loop when operating on 40 meters and selected other bands. Vk1sv on-line calculators page. ) Retuning the antenna by extending the circumference of the loop by 4cm: I decided to retune the antenna by extending the loop diameter. gif 144 33 AR15. For example, my 30-10 Meter loop is 8. Here is a quick test of the 8 foot loop. • 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). 84 1000 29 – 32 34. 10-80 Meter Alpha Loop Antenna The Alpha Loop lets me get on HF from my apartment. The antenna works very well. Choose the units of measurement, English or metric. 4 GHz loop antenna will only need to be about 12 centimeters in perimeter. By the way, they have first class customer service. 9mhz, using a seven. My 160-meter loop allows me to both receive and transmit from the 160-meter band to 10 meters. The PI4DX contest station is a normal house with quite some space arround it and 3 towers with antenna installations. UPS Ground shipping is 2-5 days, so you can expect your antenna in about 6-9 business days, depending on your location. 20 And 40 Meter Vertical Antenna. So our antenna wire is 211 feet and the 450 ohm stub is 32 feet long. Total weight: 2. The HFRA 1356 is a passive loop antenna which is matched to a resonance frequency of 13. The efficiency of such an antenna is very low, sometimes on the order of dozens of dB below an isotropic antenna. Update 1 Sept 2020. Q14: Can the MLA be used on 80 and 60-meter? A: Yes. com) No log in required! 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. Hence, a 300 MHz loop antenna should have a perimeter of 1 meter or larger; a 2. G5RV – 102 ft. And here is SWR over the range of 3-30 MHz: Note that the loop's resonances either hit or are very close to all ham bands (except 60 meters). The loop will be constructed out of 3/4" copper pipe, octagon shaped, and have a perimeter of 72 feet. Formula Dipole total Length = Amount / frequency Each leg of the dipole = Dipole Total Length / 2 Inverted Vees total length = ( Amount / Frequency ) * Percent Each leg of the Inverted Vee = Inverted Vees total length / 2 Where, Full Wave = 984 Half Wave = 468 Quarter Wave = 234 This tool will help you dynamically to calculate the total length of a dipole inverted V antenna. The AlexLoop Premier is the new and further enhanced version of the original AlexLoop with special manufactured ultra-low loss mono block gold-plated PL259 connectors. Tuning is very simple, the butterfly capacitor is set to 50% mesh, the large split-stator capacitor is then adjusted for peak in receive noise and then finally on transmit the butterfly. I use "about" because exact numbers are not that critical according to my results. 5 MHz VHF 2 metre band antenna VSWR 1. Terk manufactures such a product - an 8 inch circular loop with a tuning capacitor embedded in the base. The HF Traveling Wave Dipole Antenna is efficient for short more HF Delta Antenna D230/330. 0000 MHz 36M0G7W 47 ° 37 ' 8. 469 feet • 20 meters 70. The Alpha Loop with the Booster Cable installed is a 20 watt (more about that power rating below) 40-80 meter antenna, per the manufacturer’s specifications. The distance between one point to another adjacent point in a wave is known as the wavelength. Product Title EEEkit AM FM Loop Antenna 2 Pin Bare Wire Connector Average rating: 4. The G4ILO Wonder Loop is an inexpensive, easy to make magnetic loop antenna that covers five HF bands, 40m through 15m. The antenna is made from 2 fishing poles on a fiberglass pole in the center. View and Download Alpha Antenna Alpha QRP Loop Antenna user manual online. A piece of plywood, few meters of PVC pipe, around 20 meters of PVC insulated wire and adjustable capacitor and you have a decent portable or stealth antenna for 80 meters. You will see I have black Dacron rope attached to the middle of it, running to the peak of my roof. Note : This function applies to far-field calculations only (d > l /2 p ). The Output Stage The output stage can be recognized as basically the same as published by Murry Greeman, Lyle Kehler, and Bill Ashlock (possibly among many others). 947 feet Lengths above are in feet and inches. 2 MB PDF file by John E. 80 Meter End Fed Antenna. The ULTIMAX-8040 broadband dual band double bazooka for 40 & 80 meters is a fantastic antenna using a newly designed “HY-Q” coax coils that gives outstanding broadband performance. Normally as you move the feed point of the antenna the impedance will change‚ so you will need to use a 4:1 current balun with this antenna. 80 meters antennas are a great deal like those for 75 meters but there is a problem in the. I don't know what you have for a coupler the CC 7870 antenna coupler > works good. A second advantage is the antenna's simplicity for a 4:1 frequency range with the bi-directional characteristic. SITE ID: KOMO 140 Site 1 140 4th Ave N (KOMO 140 Site), King, Seattle, WA 122 ° 20 ' 52. The background noise was considerably reduced. Since 80 meters covers the frequency range of 3. 1/4 Vertical bazooka antenna for the 40m. We have recently been able to obtain a small number of YouLoop HF/VHF portable receive only passive antennas that were produced by the owner of Airspy. (3/2 λ) doublet with 31 (1/4 λ) ft of ladder line, then fed with coax. LOOP antenna. 41 Hope this helps someone figure out what may be causing this up/down audio change. The 6 meter J-Pole antenna is shipped UPS Ground in a sturdy box. About Outstanding Products and Excellent Service at Fair Prices For over 60 years B&K Precision has provided test and measurement solutions to customers from a wide range of fields, including research and development, product design, industrial maintenance, electronic field service, production line testing, and education. By hanging it only 15 feet (4. 5 MHz through 40 MHz and thus covers 80 – 10 meters on the amateur radio bands, all international shortwave bands plus the 11 meter CB bands. Here’s a Delta Loop from M0LTE. 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. 02 2268 –j1565 44 33 Angle of radiation remained identical 6 feet ends. Installation of Sky-Loop Antenna. The radiator wire is custom made for us in 21 mile runs. html https://www. However, you may find that your mono band delta loop may tune up on it's second harmonic at a higher frequency eg. 500’ roll of wire on ground 3. Hi-Q Amateur Radio Products - Antennas. See page 19 of the user guide. With difficulty, it could tune 15 and 17 meters, and my LDG tuner could force it to work on 80 meters, but the amount of energy actually going out the antenna was pitifully small. Two days after I posted this, my 160 meter inverted “L” antenna was taken out in a storm. Small transmitting loop calculators – a comparison – owenduffy. 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. For 40M this works out to be 1005/7. Laurent F4BWT. Подписаться185. Portable UnUnTenna Plus 40m-10m. 73 Willie Rico KC5WR. This design also allows me to 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. This month I decided to build a 2 meter 5/4 wave antenna. 160 m loop on 80, 80 m loop on 40, 20 m loop on 10, etc. 5 out of 5 stars. 5 foot leg). I have never heard that the coax needs to be a particular length for the antenna to work. A horizontal dipole is much easier to implement, but has a "blind spot" to signals arriving at its ends. Without a variable cap it’s a 1-frequency antenna built for 7070. 8 VDC at 450 ma. Most antenna modeling programs have extensive libraries of standard antenna designs to choose from, so #1 above is not so bad. Give it a shot and have some fun during those sporadic E openings, particularly using WSJT-X’s FT8. The G4ILO Wonder Loop is an inexpensive, easy to make magnetic loop antenna that covers five HF bands, 40m through 15m. I have tried plain inverted V’s, 1/4 wave slopers, full wave loops, a pair of full wave loops, a 4 square vertical array (48’ base loaded verticals), and a Bobtail curtain. sehingga sering kita dengar bahwa ada istilah 2 meter band, 11 meter band, 80 meter band dan lain lain. and actually does work on 80 Meters despite being a bit short of being a full […] Projects Update. As for 160 meters, consider it lost. The Hi-Z 8A system dominates the top band receiving arrays. The reason is, a 160 meter loading coil is about 5 times larger (in inductance) than an 80 meter loading coil. However, the average noise level of 75/80 meters is about -112 dbm or an S3. This evening, in absolutely miserable band conditions I was able to have a CW QSO with a Swiss station calling CQ with a 569 signal on 30m. See picture below. antenna to operate in both the CW and SSB “DX windows” on 80/75 meters. All stainless steel, 600 Watt, with proper strain relief. For ham radio, NVIS, disaster, & emergency communication services. 2 MB PDF file by John E. Hello Everyone, I in the last stages of building a magnetic loop antenna for the 80 / 160 meter bands. Testing HF YouLoop: antenna 40cm at roof VS antenna 60cm in shack INSIDE that noise there may be signals which you can't (or can barely) "read", now, my suggestion is to avoid looking at the "s-meter" and, instead, judging the. 2017 by oh2gqc. I can run full legal limit with it if need be. The larger the wire, the wider the bandwidth. We have recently been able to obtain a small number of YouLoop HF/VHF portable receive only passive antennas that were produced by the owner of Airspy. Today I got my 80 M inverted vee back up from having the house painted and it definitely hears better than the horizontal loop I've been using. (Bob) Leschyna. Alpha Antenna 10-40M Alpha Loop antenna [10-40MAlphaLoopAntenna] - 10-40 METER MAGNETIC ALPHA LOOP ANTENNA The Alpha Loop from Alpha Antenna is a handheld and jaw or tripod mountable antenna that can also be set. more HF Vertical Whip Antenna Codan 406. 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. Tower is M38 from Vaargaarda in Sweden. This antenna so far has met my expectations and is weight comparable to other SOTA antennas I have. 5 ft in circumference and 23% efficient at 10. Xpdr/TCAS; Loop Meter for high testing current up to 280 A View Product 80 x 80 Thermal Imaging Camera View Product. 6 MHz and you arrive at an overall length of 130′. 798 feet • 160 meters 528. From: "Jerry Ford" Date: 2002-04-30 9:57:06 [Download RAW message or body] Sandy: I'm tuning an 80 meter loop with my K-1 and it works great. I use a 3 foot piece of RG8X coax from the balun to my antenna switching matrix. In radio frequency (RF) terminology, the Very High Frequency (VHF) range is the signal spectrum from 30 to 300 megahertz (MHz). The sixty-six foot version is built around a resonant 40 meter antenna and performs well on 80 meters. To build a "Morris DF Loop", we essentially take one of the square elements of a quad antenna, round it into a loop, and install it inside a Dragonfly. Several comments will follow concerning each of these antenna types. 500’ roll of wire on ground 3. On 80 meters a 40 meters loop is λ/2 long. For sale is a Palomar Engineers Loop amplifier + 2 loop antennas. Parnell, “Use your tower as a dual band, low band DX antenna, QST, Vol. Design your own tuning capacitor for use with this antenna with the Capacitance Calculator (Capacitor Design) To use the calculator: 1. 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. 80 Meter NVIS Antenna. The 80 meter Quadloop antenna kit contains all the components to create the ideal Quadloop antenna. If you can manage it, use a balanced, center fed antenna, it is the easiest to deal with and will result in less RF-in-the-shack. Channel Master is a leader in over-the-air broadcast entertainment products & solutions, providing the highest quality and value for consumers since 1949. 8 meters philco ford 12. 185 feet • 40 meters 140. I used two lengths of PVC pipe to form the horizontal elements of this simple, 10m loop antenna. I have tried plain inverted V’s, 1/4 wave slopers, full wave loops, a pair of full wave loops, a 4 square vertical array (48’ base loaded verticals), and a Bobtail curtain. Antenna 6 144Mhz Collinear. We use beverages and loop antenna for receiving and have a TH11DX log periodic for the multipliers and WARC,. 73 - Dave, N4ELM. Portable UnUnTenna 40m-10m. A full wave for 3. The 80 meter loop is really designed for 80M and 40M. Magnetic loop antenna calculator. The loop is no longeroperating in the mode of a magnetic loop. 5 Mhz band, including the 160 meter and 80 meter amateur-radio bands, and the broadcast bands on 120, 90 and 60 meters. 5:1 bandwidth = 6. 10-80 Meter (100W 10-40M, 20W 40-80) Magnetic Alpha Loop Antenna. Charles, MO 63302 (636)442-1320. 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 low chance of it being accidentally discovered. 10-30 MHz Hi-Q Deluxe Loop Antenna MFJ-1788. A classic 80 meters Zepp antenna was used as reference at a height of 20 meters, while the loop was mounted on a 2 meters pipe. 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. Antenna delta loop 6 metri 50 MHz, IZ7CFF Delta Loop, has a value of about 125 ohms, while its gain is about 1. 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. antenna height. 5 aylar önce. 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. Today I got my 80 M inverted vee back up from having the house painted and it definitely hears better than the horizontal loop I've been using. 6 MHz and you arrive at an overall length of 130′. 00 shipping. I6VMS project , IW6OVD, IZ6GAC, IZ6AVN,, I6IBE. The distance between one point to another adjacent point in a wave is known as the wavelength. I have been experimenting with small (generally less then 1/10 wavelength circumference) transmitting loop antennas in the HF bands since the 1980's. Welcome to the Magnetic Loop Antennas page. html https://www. It gives you superb current balance throughout its very wide matching and frequency range. My 40 meter vertical cost me $13. There are times, however, where a shortened vertical for the lower HF bands (such as 80/75 meters) is necessary where horizontal space is lacking. 90 MHz: This antenna is tuned by the following procedure: 1) Put up the entire length of wire and the 4:1 balun and resonate it to the upper end of 80 meters by lengthening or shortening it. LOOP antenna. Price: $3. Be sure that the receiver has CW or SSB modes in addition to FM, because 80m foxes send keyed CW. This tuner is shown in the ARRL handbook of 1976, pg 584. 00 shipping. Portable Magnetic Loop Antennas (>80%) zVery Easy Sample Project—Doomsday Loop High Power Loop 15 and 20 Meter Coverage. 5000 mhz 34k0f3e 1626. Antenna is complete. K4TR WIRE ANTENNA MFG AND SALES "Your Virtual Mail Order Store" Joseph Dube K4TR 830 Darby Lane Brooksville Fl. E (V/m) = Electric field strength in volts per meter (V/m) at a distance (d = 1 meter) from an antenna with unity gain (G=1). RCARCS 2016-03 Loop Antenna Notes. A dipole is that long and it works, so perhaps the loop can play on that band. It is fed with 100 feet of 300 ohm window line and terminated in the shack with the above mentioned DXE balun. By simply adding a second loop with a 5 cm. loop antenna, but typical NVIS signal levels exceed those from a vertical mobile whip. Antenna 6 144Mhz Collinear. porous, allowing 160 and 80 meter signals antenna for EOC, 12 db with ground Mobile Magnetic Loop NVIS WB3AKD. Portable Tri-Band Vertical Antenna 40/30/20m. Here, you'll find links for high gain loop antennas covering hf. 440 mhz mobile 220 mhz mobile 144 mhz mobile 50 mhz mobile 28 mhz mobile 24 mhz mobile 21 mhz mobile 18 mhz mobile 14 mhz mobile 10 mhz mobile 7 mhz mobile. The efficiency of such an antenna is very low, sometimes on the order of dozens of dB below an isotropic antenna. The top was 17 meters over ground, and the two other ends some three meters over ground. 5 to 4 MHz Good 80 meters antennas are easy to build with nothing more than readily available materials. As for 160 meters, consider it lost. com/forums/f_10/22_Ham_Radios. 546 feet • 30 meters 97. See full list on surriel. This was created as a fun project to demonstrate how to enjoy operating HF in the field with a home-made portable antenna without spending a ton of money. antenna height. TV antennas range in price from about $25 to $50 for indoor antennas and $40 to $150 for outdoor antennas. 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. So the hunt started for the balcony antenna, it had to be stealth (as condo rules do not favour antennas), multi band with adjustments from indoors and able to handle cold winters without troubles. Bazooka Antenna Design — from WE6W Beverage— a short beverage design by K3KY Broomstick Special: — compact, easy-to-build. Channel Master is a leader in over-the-air broadcast entertainment products & solutions, providing the highest quality and value for consumers since 1949. That means that for a +10 dbm SNR (signal to noise ratio), the. 08 in) All stainless steel hardware, including the axis Diameter 2m (78. A double doublet antenna enables 80 meters and 40 meters to coexist on the same antenna system without interfering with each other. Wastebasket Antenna for 80 meters: rate this post. It gives you superb current balance throughout its very wide matching and frequency range. Home made high power magnetic loop antennas amrron. This link is listed in our web site directory since Tuesday Dec 24 2002, and till today "Super Loop Antenna" has been followed for a total of 68464 ti. of coax to rig. The AlexTune makes tuning the AlexLoop a cinch. Haunted as many others by radio interference and noise I started looking for a wideband portable antenna. This ham radio coil-loaded 40 and 80 meter inverted V dipole HF wire antenna is easy to build! Loading coils make this antenna a full size on 40 meters and a… Video Rating: 4 / 5. Specifications. vedi il VIDEO del test on-air LOOP+TS2000. If you have the room, I always hear that a full-wave loop is a great antenna for 160 meters. 02 2268 –j1565 44 33 Angle of radiation remained identical 6 feet ends. 40 Meter Vertical Loop Antenna. The top is 23 meters high and goes to the right to a pole on the roof of the house. 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. It will be turned using a Yeasu G-1000 rotator with a K3NG controller. The feedpoint uses a 6 inch section of ½ inch diameter PVC pipe. Magnetic loop Ideal for restricted. Operating on 160 meters has always been a challenge. | Wumpus Welt der Radios. Wire Antenna Trap Kit. Thank You & 73 VE3UK, W. It is written in the Dutch language, my mothertongue. LOOP antenna. End Fed 80 - 10 meters HF Multi Band EFHW 100 watts 49:1 transformer. net or Phone#: (352) 797-6062. Oh…you can use the 40-meter dipole on 15-meters without modification. The antenna is symmetrical and closed so that in many cases the reception will be quieter compared to asymmetrical or open antennas. Reception can be improved by using a third party antenna mast rotator, and rotate the loop element until your receiver's signal strength meter (S-meter) deflects to maximum and the incoming. I checked in to a local 1. Meine Magnetic-Loop mit zwei Windungen für 80 und 40 Meter - QRP magnetic loop by KR1ST; PA3CQR Magnetic loop antenna page - Portable HF Transmitting Loop Antenna - Practical Experiments with Magnetic Loop Antennas - Small loop antennas (magnetic loops) - Stealth ST-940B Mobile HF NVIS Magnetic Loop Antenna - The G3BGR Magnetic Loop - THE. Short Delta Loop antenna, only 8,5 meters per side. antenna height. Install full wavelength loop horizontally above the ground (if real estate is available) or on the roof top; as high as possible. KE5KJD adds his own elements to a. 5:1 bandwidth > 10 MHz UHF antenna Designed Centre Frequency = 435 MHz Return Loss = - 23. The sixty-six foot version is built around a resonant 40 meter antenna and performs well on 80 meters. a big asset for DX to the club. It's an 1/8 wave vertical on 160 meters also. Portable UnUnTenna Plus 40m-10m. Two large DPDT frankenstein knife switches do the connections between a 40 meter dipole and the loop. to CISPR 16, 9 kHz to 30 MHz, constant antenna factor 20 dB/m, built in rechargeable battery, charger ALCS 2-24A. This antenna is 58 ft tall and is mounted on a hinged base. Pre-configured Loop Antenna Systems. 08 in) All stainless steel hardware, including the axis Diameter 2m (78. By hanging it only 15 feet (4. This evening, in absolutely miserable band conditions I was able to have a CW QSO with a Swiss station calling CQ with a 569 signal on 30m. TAK-tenna 40 to 10 meter Multiband Antenna Boom = 30 in/76cm; sprial radiating element = 30 in/76 cm diameter; weight = 4 Lbs/1,8Kg TAK-tenna 80 to 6 meter Multiband Antenna. Alpha QRP Loop Antenna Antenna pdf manual download. For the 80 meter band a full wave loop antenna resonant at 3. The only catch was the method of feeding by a Faraday loop , it made the project hand sensitive …. Portable Alpha Loop (version 6. I purchased a G5RV and installed it in the same location. It takes me forever to complete some projects. I chose 58' for Mid 80 Meter Operation. Hello Everyone, I in the last stages of building a magnetic loop antenna for the 80 / 160 meter bands. I like to use a home made current choke to keep RF from coming back on the feedline. 5 MHz through 40 MHz and thus covers 80 – 10 meters on the amateur radio bands, all international shortwave bands plus the 11 meter CB bands. Field meters. The following photos and writeup are the results. 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 loop featured in the pictures has a mean diameter of one meter, low capacitance , heavy solid copper armour/shield instrumention cable wound with only two turns series connected inside the shield is self resonant at 2. Report to Moderators I think this message isn't appropriate for our Group. A dipole design for the 20-meter band is an efficient and inexpensive antenna for the novice and veteran ham enthusiast alike. 5000 mhz 34k0f3e 1626. The CODAN 406 series Guyed Vertical Whip HF antennas are more HF Traveling Wave Dipole Antenna Codan TWD215/315/525. It is designed for portability, and can be assembled or disassembled in about a minute. 2019 - IK1SOW "Per aspera ad astra" hat diesen Pin entdeckt. Pre-configured Loop Antenna Systems. Magnetic Loop Antenna for 80-20 mtrs by Frank N4SPP. Great for digital. 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. I chose 58' for Mid 80 Meter Operation. Television and antenna; Video surveillance; Advanced search Search. This link is listed in our web site directory since Tuesday Dec 24 2002, and till today "Super Loop Antenna" has been followed for a total of 68464 ti. Quick Link to Calculators. 95 including free worldwide shipping. See also: Amplifier for internal antennas The Australian 1 metre loop Werner Funkenhauser describes in detail the loop antenna model he's been using for years to capture lots of rare Trans-Atlantic medium wave stations. The loop really, really cuts the mustard on 160, 80 and 40 meters. Delta Loop HF base antenna for 80 meter band - EXTREMELY HIGH QUALITY. This was my only CW antenna at my 1979 expedition to Andorra. Optimum height is about 1/4 wavelength. 3 MHz) 10 meters ( +/- 28. See also: Amplifier for internal antennas The Australian 1 metre loop Werner Funkenhauser describes in detail the loop antenna model he's been using for years to capture lots of rare Trans-Atlantic medium wave stations. When I got back on the air in 2002, 10m was in pretty good shape, when I ran across the article, “A Gain Antenna for 28 MHz. The most simple of possible mixed antenna arrangements is a co-sited loop-pIus-wire combination. Normally as you move the feed point of the antenna the impedance will change‚ so you will need to use a 4:1 current balun with this antenna. In one of my recent posts, I described an inverted "L" antenna I built for 80 meters--a band I find difficult to use because of my restricted space. At low heights the 50 ohm coax is likely to give you a better match on 80m, while with a higher antenna a 4 : 1 may have a lower SWR on 40m. I use a Kenwood TS2000 with a D104 microphone and Yeasu 101E for HF on a 40/80 meter dipole, 2m Jpole, 70cm copper loop …. The random wire antenna is probably one of the least expensive, easiest and cheapest HF antennas to use if you have a tuner and you want to get the "most" out of a length of "random" wire without having to pull out that calculator, doing the math, getting the center insulator built or bought, running the feedline, and all the rest that goes with putting up a more elaborate antenna. 10-80 Meter (100W 10-40M, 20W 40-80) Magnetic Alpha Loop Antenna. 5:1 bandwidth > 10 MHz VHF commercial / marine antenna VSWR 1. View and Download Alpha Antenna Alpha QRP Loop Antenna user manual online. 0303 Siemens/meter and relative permittivity = 20). HFedz Antennas Fanpage. For the 80 meter band a full wave loop antenna resonant at 3. 80 meter loop is 1005/3. For ham radio, NVIS, disaster, & emergency communication services. 16 Figure 25: Harris NVIS Loop, RF-3134-AT003. A value of 470 Ω splits the difference for “pretty good” performance on both bands. I compared the LoG’s reception with the other antennas installed here at WA1LOU by noting the signal strength of 23 random stations across the AM band using the dBμ reading [absolute voltage (Terminated)] of my ICOM IC-R8600 receiver. The antenna is symmetrical and closed so that in many cases the reception will be quieter compared to asymmetrical or open antennas. 20-21 A bidirectional,40 meter 2. Transmitting using the Butternut HF2V vertical, it perform very well. Some ON8IM Homebuilt antennas. Antenna Round Up — antennas for 6, 10 & 2 meters Antenna Theory 101 — antenna tutorial from KD4SAI Antennas from K5DKZ Antennex — online antenna magazine Attic Antenna — trap dipole design for your attic. Haunted as many others by radio interference and noise I started looking for a wideband portable antenna. As it is not a high Q loop the bandwidth is in the region of 40 Kcs on 80 mtrs and 14 kcs on 160mtrs. • 10 meters 34. In researching the effectiveness of multi-turn loops, much is written about the proximity effects of two turns and that such loops may only be marginally more efficient than a one turn loop of the same size and exhibit a similar restricted bandwidth. Feed the loop at its apex (marked as F, F in Fig 1) with RG-8 or RG-58 coax cable (any length) through a PL-259 connector. The large diameter yields broadbanded coverage of the 80 Meter Band. the loop size in the calculator to get the best efficiency possible in your favorite band. Tuning is fairly easy on the lower bands, but is quite challenging on 10m-15m due to the significant effects of hand capacitance at those frequencies. This is where the standard is set. One of this summer's projects was to put up a full-wave 80 meter horizontal loop antenna, sometimes called a "loop skywire". Why? Why? I want to do 80 mtrs DX, but I have no room for a decent 80 m wire-antenna, nor would I be able to install such an antenna high enough above ground. Besides, as a MagLoop Insider, should you decide to purchase one, if your email has been on file with me, you will qualify for a meaningful discount coupon. After trimming the antenna to be resonant in the center of the 40m band, we found the final impedance to be around 80 ohms. On 40 meters the SuperLoop 80™ is a 2 wavelength open loop or Bi-Square. 2 Meter Full Wave Loop Antenna. For an 80-10 meter OCF dipole antenna, divide the 1⁄2 wavelength standard of 468 by the lowest operating frequency of 3. The Feed and Phasing cables are added. The insulation gave it a little cushion. Another item on this website discussed antennas that amateurs use to operate from confined locations. Especially on 30 & 17 meters where it is excellent. FOR SALE - Santa Maria, CA - Antenna meter for cb or HAM Forward Reverse switch Impedance set control 50 Ohms 500 watts Made in USA clearing out my garage!. K4TR WIRE ANTENNA MFG AND SALES "Your Virtual Mail Order Store" Joseph Dube K4TR 830 Darby Lane Brooksville Fl. Price: $3. The measurements below are for building a simple Dipole Antenna. Measure 206 11/16 inches from the end of each wire, and cut the wires to this length. 5 MHz through 40 MHz and thus covers 80 – 10 meters on the amateur radio bands, all international shortwave bands plus the 11 meter CB bands. 469 feet • 20 meters 70. 34 feet (211 feet is close enough). 5 ft in circumference and 23% efficient at 10. Custom RF design for HOA and XYL approval. Antenna: 80 meters, Range: 3. If we have a loop like this with a high feedpoint resistance, over 10-20 ohms, the antenna has very high loss. 2:1 dip on this frequency) AF knob was at quarter PAST the hour as the audio is generally very low and has been for a long time. 2017 by oh2gqc. A Simple Loop Aerial for 160/80, G3YXM The antenna should tune from 1. Portable UnUnTenna Plus 40m-10m. The smallest antenna described for 80 metres was a magnetic loop. the loop size in the calculator to get the best efficiency possible in your favorite band. To receive a specific VHF signal, you simply need a dipole antenna. HFedz Antennas Fanpage. 80 meters antennas are a great deal like those for 75 meters but there is a problem in the. 56 MHz with 370 kHz bandwidth (-3dB). ◎ A loop antenna is very directional. 16 Figure 25: Harris NVIS Loop, RF-3134-AT003. First off you have to know that I didn’t invent this. Second is a 80 Meter - 287 Foot vertical Delta loop feed at the top apex with 4:1 Balun to 100ft coax run. For other values of d, divide the calculated E (V/m) by 10 for d = 10 m; by 100 for d = 100 m, by 1000 for d = 1000 m, by 10000 for d = 10000 m, etc. Remarkable for an antenna that is only less than three foot in diameter and covers 3. Radio Wavz [email protected] However, you may find that your mono band delta loop may tune up on it's second harmonic at a higher frequency eg. 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. It seems almost magical to me that a magnetic loop sitting on a tripod by my window acts like something usually much larger. Van der Hoofden Test Head. 5000 - 1660. a big asset for DX to the club. Requires antenna tuner. AM frequencies and 160 or 80-meter ham bands) with an antenna well cut at 1/4 l, what means 40m long on 1. This design also allows me to 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. For sale is a Palomar Engineers Loop amplifier + 2 loop antennas. For the 80 meter band a full wave loop antenna resonant at 3. As for 160 meters, consider it lost. The remote control lets me tune it from my shack. 5, May 2019, pp. Small loop antennas are generally quiet, but low efficiency and very narrow bandwidth. The rest of the antenna wire is pulled down with a rope. Today I got my 80 M inverted vee back up from having the house painted and it definitely hears better than the horizontal loop I've been using. 2 uH and under 0. This antenna so far has met my expectations and is weight comparable to other SOTA antennas I have. The CODAN 406 series Guyed Vertical Whip HF antennas are more HF Traveling Wave Dipole Antenna Codan TWD215/315/525. Here is the results of a CQ run. It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength. 8 VDC at 450 ma. Vk1sv on-line calculators page. Delta Loop Antenna 80 Meters. Knowing what I know now, I probably would have cut the wire for 560' feet to make the upper bands work better and kept an eye on the tuner to make sure it wasn't getting hot - the only reason I would have done this is laziness so I wouldn't have to bother with splicing more wire. AB0X Roof Loop 2. If you can cut it for 160 meters go for it. Since its inception in 1948, various Harvard departments and private benefactors have added material to the original nucleus of the Collection of Historical Scientific Instruments (CHSI), which now contains over 20,000 objects dating from about 1400 to the …. 70 500 19 – 25 26. 66' 15, 17, 20, 30, 40, 60 meters 88' 20, 30, 40, 60, 80 meters The chief advantage of the broadside doublet is that you always know the directions of your radiation or your most sensitive reception. The antenna is symmetrical and closed so that in many cases the reception will be quieter compared to asymmetrical or open antennas. This evening, in absolutely miserable band conditions I was able to have a CW QSO with a Swiss station calling CQ with a 569 signal on 30m. That meant most of my signal was going up, not out. Stryker SR-94HPC 10 Meter Amateur Ham Mobile 45w Compact Slim Radio Color LCD. 23 28 –j421 30 meter 7. One knife selects the antenna, the other to one of two tuners. Wastebasket Antenna for 80 meters. This is an End Fed Half Wave Long Wire wire antenna that will cover all bands from 80 to 10 met. A long-perimeter horizontal loop antenna normally is used as a multi-band device, otherwise a completely different one- or two-band antenna would be erected. C1 100-pF, 2-kV variable capacitor with ceramic end plates and silver-plated fins, eg. First off you have to know that I didn’t invent this. Over 80 state-owned facilities to be privatized in. The calculator yields a reasonable approximation of dimensions, to within 5% over the amateur bands, using typical wire gauges ranging from #12-18 AWG. This antenna is 58 ft tall and is mounted on a hinged base. 1Mhz but 91% efficient at 28Mhz. 5000 mhz 132kg7d 36. adapun istilah tersebut adalah hasil dari aplikasi rumus diatas, yang mungkin bagi masyarakat awam enggan atau kurang familier menyebutkan frequency nya , sehingga di sebutlah hanya panjang gelombang nya. 80 METER HORIZONTAL SQUARE LOOP Length of a full-wave 80-meter loop is about 270 feet long (1005 divided by frequency in MHz) or about 67 feet per side. Doublet – Multi-band antenna that is not resonant on a particular band. And that’s all there is to it! This is a great first antenna! Your next step, after getting some air time, will be to insert some traps in that dipole so you can use it on 20-meters. 67 dBi 155 +j354 vs 8. 5000 mhz 34k0f3e 1626. The primary problem is that PVC tubing has a significant velocity factor which causes RF to slow down. With such a set and an RDF antenna, you're ready for an 80-meter hunt. In addition, specific models mentioned in the magnetic loop Antennas forum Like MFJ and more are here for future reference.   This is a common misconception and when using a loop, doublet or double extended Zep (and several others) for multiband operation will result in "operational frustration". My trusty good luck (the cat) was with me through the whole project, hi. For 80 meters, I connect the opposing walls giving me 2 “L” shaped legs of the dipole.