80 metre antenna. Another good choice might be the Cobweb antenna, which is small, horizontal, omni-directional, without nulls. The 25m long antenna described here will get you on air without an ATU on 80m, 40m, 20m, 15m & 10m. 1Notes appear on page 35. 4240) bei uns anfragen? Dann nutzen Sie das nachfolgende Formular, wir melden uns gern bei Ihnen! Dann nutzen Sie das nachfolgende Formular, wir melden uns gern bei Ihnen! Er ist zufrieden mit ihren Schwimmkünsten. I don't know the provenance of this antenna but it was already popular in the 1980s with hams who needed decent DX performance that works in a small lot with the Antenna 80 meter Links → . Frequency Coverage: 3. 6:1, 9. 29 feet. During the day, stations up to a few hundred miles away can be heard, making 80 meters a better choice for medium-distance contacts 55′ Vertical Antenna For 40/80/160 Meters; J-vertical Antenna for 10 meters band; 6m/10m Dual Band mobile whip; 6m 1/2 wave Melrose Vertical; VK5AH – HF 4 Bander Antenna Construction & Adjustment Tips; 40m/80m Lake Eyre Portable; G5RV All-Band HF Antenna; EH Antenna for 80 M; vertical antenna Economy QRP Antenna 80-40-20-15 End Fed w/o a tuner! Contributed by John T. We can also hang up less wire for a portable operation as a 40 meter random wire could be as short Magnetic Loop Antenna for 80-20 mtrs by Frank N4SPP (STL) antenna that covers at least the 80 and 40 meter bands (preferable 80 - 20). A full wavelength at 3. 40/20 – 53’ft. This detuning lets my K-2 tuner match on even 20 and 10 meters! Great stealth antenna with no comromise. Reader Interactions . This sure beats the 133 feet necessary for an 80 meter end fed half wave. An optional 40-80 Booster Cable makes the Alpha Loop into a two-turn loop, enabling TX/RX on 40-80 meters, which also The Inverted V antenna; 20 meters QRP Dipole; Instructions for Putting up a Long-Wire Antenna; J-vertical Antenna for 10 meters band; 6m/10m Dual Band mobile whip; 6m 1/2 wave Melrose Vertical; One thought on “ A short dipole for 80 meters ” Anonymous says: February 4, 2023 at 3:15 am When the antenna is horizontally polarized, it should be mounted as high as possible, but it can work well at low heights of 10-30 feet. 9 meters wire at its end. Assuming that our radials are a quarter wavelength long then each radial is 65 feet long and the circumference of the circle covered by our radials is 2*pi*65 or 2*3. NVIS rarely works at frequencies outside the range of 2 MHz to 10 MHz. While there are antennas which are more complex than an inverted vee, there are still several issues to be considered. Er liegt im Kurzwellenspektrum. 5MHz; Length: 245cm; VSWR: 1. Definitely! In fact you can find this triangle or Delta configuration, in the ARRL antenna handbook 19th Edition, in Figure 4. From the condition, it looked like it had been installed outdoors for a few years, so I got it at a good price. 7:1, 7. Beispiel: Angenommen, du möchtest die Delta Loop für eine Resonanzfrequenz von 14 MHz (20-Meter-Band) bauen: Berechnung der Gesamtlänge: P = 300 / 14 MHz ≈ 21,43 Meter; Berechnung der Seitenlänge: 40 thru 10 Meter Zepp Antenna A modified 20 meter double zepp wire Operating Bands: 40 thru 10 meters (with tuner), basic construction and performance information. Quad Antenna System by Pfeiffer Maltese Excellent Quad Antenna projects for 40 20 17 12 10 and 6 meters band in this pdf file project by Pfeiffer Maltese. 12 meters: 40. Nearly all the serious Contesters in PVRC, and all of their Superstations, have Receive-only Antenna options for the lower Bands. That is a lot shorter than a standard 1/4 λ vertical. All three models handle up to 1000 watts SSB/CW and 250 watts AM/Digital Modes. The 64 ft. 9 MHz Full-Wave Loop Antenna. We hebben een 1:1 Balun coaxgevoed, maar mijn vraag is of 2x10 meter of 2x 20 meter. DX Commander vertical antennas are based on the same principles as a fan dipole, 80-meter antenna. Der Name leitet sich von der ungefähren Wellenlänge dieses Frequenzbereiches ab. Figure 1—(A) Top view of the DJ4VM loop; (B) Top view of a quad loop showing the transposed phasing Setup is super easy and quick, and the antenna can stand freely on its own with no extra supports. The exact length for resonance depends on the diameter of the conductor and the shape of the loop, but And we had a clear path to the East for more than 80 km (50 miles). 5:1 or less. 55M 3. 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 The antenna has a limited bandwidth on the 80 meter band because the antenna is shortened for this band. (Enter "0" for a base loading coil. The antenna is symmetrical and Wideband 80m Dipole. End loading, An 80-meter vertical antenna would ideally be approximately 20 meters (about 66 feet) long for a quarter-wave design. So how do we shrink the length and maintain most of the We erect the MyAntennas EFHW-8010-1K end-fed half wave antenna that covers a small portion of the 80 meter band, plus all of 40, 30, 20, 17, 15, 12, and 10 m 80, 60, 40M Double loop convertible (Cap Mod) These days my primary band for data communications is 40M, so my personal build is a collapsible, 2 turn loop, operating on 80, 60, 40m. 55M at Radioworld UK for the best prices with fast worldwide delivery and great customer service call 01922 414796 or order online now rated excellent on Trustpilot Dabei bleibt die Länge der Antenne unter 25 Meter. Instructions This Antenna design was one that I used about 4 years ago, it worked exceptionally well on 80m and 40m. Only 2 left! Buy now with ShopPay Buy with . It worked well also on 20m with the use of an A. Width of antenna runs 140 feet total—from end to end. 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. An early version of this type of HWV antenna for 160 meters was the "rubber duckie" antenna developed by Joe Moraski, KY3F, in the early 1990s. 76 . 1. Like Like. On 3700 kHz the SWR is 1. Antenna, NVIS, Shortened Dual Dipole, Portable, 80 and 40 Meters, Includes 15 ft. Individually pretuned matched traps for each band, 50 Ohm feed, coaxial cable not included. Within 18 months, I had worked out that you can build a loop of a wavelength in circumference (give or take a percent or so) and feed it with an amazing 5,869 QSOs on 80 meters! The top hat forces radiation current to be maximized over the entire height of the vertical. 95 Save. I went with 119 feet for the length and the performance has me blown away. 8 MHz is 984/3. The size of the antenna makes a Half wave length on 80 meters, and with the traps a half wave on 40m with a SWR (standing wave ratio) of 1:1-1. 375 wavelength height plot in Figure 3, antennas at greater heights BUILD THE "COBRA" ANTENNA By Raymond A. The Ultimate 80 meter ham radio antenna. You should consider a multi-band vertical on that 7th floor roof, if roof is large enough to lay out several quarter-wave radials. 5 meters wire. 5 MHz to 4 MHz. G. vk3cat – 8 Mar 16 160m, 80m, 40m Curtain Zepp Antenna. 5 Mhz 3. Constructed with a top-quality FLEX-WEAVE ™. With a good ground conductivity the optimal height of a 80m NVIS dipole is from 10m to 18m. 1/2 λ dipole (meters) = 142. The need for an external tuner may vary based on the antenna After installing the antenna, measure the SWR to find the resonance of the antenna and note it. Power Handling: 2KW SSB PEP. 7 dBi gain at 87°, 0 dBi gain at 22° Let's take a look at what this would mean on 80 meters. Eine Antenne muß eventuell auf diesen Wert in etwa angepasst wer- den. Amatuer Ham Radio Antennas Also Great For Limited Spaces. A friend, WA7YLI, has similar interests. Voor de qso binnen de benelux en europa. I have had some success with short, loaded vertical antennas with a single Before permanently installing the antenna on top of the fence, I tested it with an inverted V configuration at 25 feet. 5 out of 5 stars. We Use a 4:1 balun for all delta loops, and for the larger 80 and 160m loops, no balun is required). Here is one way to squeeze in a resonant 160 meter antenna (no coils) where you don't have enough horizontal space for a full-length dipole. The model and the measurement agreed closely on this score When I first started out with this hobby, I had a half-sized G5RV and I genuinely thought that I’d never get onto the 80 meter band. 1 - Withdraw the radiating element carefully to avoid damaging the matching components A few years ago I bought a secondhand Diamond X50 dual band (144/430) antenna at a radio car boot sale. Enter your desired frequency (MHz) of operation (i. 2:1 on 80-meter and 1. If you are targeting longer range (200km or more) the optimal antenna height is higher. SELECT YOUR 10-80 Meter HF EMCOMM Antenna. 3 MHz. A dipole fed with 300 ohm feeder can be used on all short wave bands. April 18, 2024 is World Amateur Radio Day (WARD). antennas that are tunable to operate over segments of the entire Alpha Delta Single Band Full Size Dipole Antennas. The antenna is symmetrical and closed so that in many cases the reception 130' Half-Wave End-Fed 10 thru 80 Meters Antenna. height. Wire Antenna Band; 80 meters 40 meters 20 meters 15 meters The ALLBANDKWJR is 74 ft. Hand made from 6063-T832 commercial drawn aluminum tubing 2 1/8 inch big bottom section tapers to 1 inch at top for strength. This feature facilitates easy setup, eliminates static noise, and offers a DC path to Earth. 4 meter antenna wire L is the length of the antenna (feet) f is the frequency (MHz) To calculate the length of an EFHW antenna, divide 468 by the frequency in MHz. , 4 times) over a simple low dipole are possible • Consider horizontal loop or Lazy H over a SIGMA AM-PRO 80 Meter HF AntennaSpecifications Power handling 250 watts Length 2. SWR: < 1. The 10/(15)/20/40/80 End fed Antenna Kit has a total length of approx. With a power handling capacity of up to 400W RF, meeting the total UK limit, the LW-20 is a reliable choice for various The ULTIMAX dual band double bazookas are fantastic antennas using newly designed “HY-Q” coax coils that gives an outstanding broadband performance on the bands requiring very little 2 Models 80/40M and 40/20M. Recent changes. (A good site is perhaps more important than a good antenna!) I used the antenna for 2 or 3 years, until I had an injured foot and couldn’t scramble up and down the slope to install it, so I put up a quick 40m doublet instead. Atlanta, GA. The DXE-NVIS-8040 and DXE-NVIS-8040NM are full size, with 67 ft. 29 November 2023: RF Exposure evaluation, Ten-Tec AC5 balanced antenna tuner 29 November 2023; 5 May 2023 – added Link Dipole article and more alternatives to knots 5 May 2023; 26 March 2023: Added Beginners’ Corner, and Beginners’ Guide to NVIS 26 March 2023; 9 February 2023: Field Day updates 9 February 2023; 8 February 2023: updates to The MFJ-1748 End Fed Zepp is an end-fed wire antenna that, when properly erected and fed with balanced feedline through an antenna tuner, will be usable on all amateur bands from 80 to 10 Meters. L2 also is 12 feet and the overall DX Commander CLASSIC HF Multi-Band Vertical Antennas are an excellent choice for DX performance and general operations. This antenna actually works OK on all bands 80m through to 6 metres. Specifications. Distance from antenna base to the center of the coil in feet. 5MHz 80 Metre Mobile Antenna. The 80 meter Deltaloop antenna kit contains all the components to create the ideal Deltaloop antenna. Operation on 15 meters is enabled, because it is a third harmonic of 40 meters. The antenna is probably too long. I do however recommend an air choke balun on all loops (See note 1 below) to eliminate stray RF in the shack and hopefully keep your XYL off your back! Full wave, closed loop antennas are broadband, low Q devices and exhibit a theoretical gain of approximately 2 dB over a half Home ALL MFJ-1793,SUPER 80/40/20 METER VERTICAL ANTENNA. Portable 6-80 meter HF antenna that deploys in 5 minutes for pre-tuned touch free operations optimized that provides directional DX and EmComm NVIS. Delta Loop Antenna. 5KW/5KW PEP rated - FREE shipping in USA Store / Antenna Products / CUBE Impedance Transformers (<1:1, 1:1, >1:1) / Off Center Fed Dipole Transformers Antenna, 80 Meter QW Vertical, 80m, Self-Supporting Heavy-Duty, Full Size, 70. The stub is around 100 feet in length (75 to 120 ft is recommended), using 450 ohm ladder line. Denver, CO. Best HF mobile whips for the money by far !! Never a disappointed customer used by our staff everyday. Figure 1 shows the basic doublet antenna design using 450 ohm ladder line to a remote 4:1 Current Balun; a short coax jumper to go into the house (shack); then connecting to an antenna tuner. Plano, TX. Weight: 400g Power: 120 watts Impedance: 50 Ohms VSWR: 1. 84 feet. It is simply a half wave end-fed on 80m which will resonate on all multiples of that frequency, loaded with a small inductance near the feed end. The antenna is not symmetrical and there is no advantage to trying to shorten or lengthen both diagonal legs. Part Type: Wire Antennas. Bisher war die knapp fünf Monate alte Toni nur auf der Außenanlage im Wasser, das dort etwa 1,20 Meter tief ist. 5-57MHz)with external any tuner DX-LB Low Band Dipole Covers 160-80-40 meters with an overall length of only 100 ft. 5 out of 5 stars for the 160 Meter Band. This is possible to achieve on a case by case basis, but not as a generically reproducable solution. 15 meters: 47. This loop requires a minor modification to the tuning capacitor, switching it from two gangs in series, to a parallel configuration. The result will be the length of the antenna in feet. The antenna tuner can be a manual unit or an automatic unit; that connects to an amplifier or directly to a A half wave of wire should work well as a single band 80 meter antenna. 85 would be about 261 feet long. Winter A multiple-band antenna that can cater to 6, 10, 12, 17, 20, 40, 80/75, and 160 meters. 55). by 50 ft. Figure 1—(A) Top view of the DJ4VM loop; (B) Top view of a quad loop showing the transposed phasing For use 40-10m the antenna is acceptable as is. Allow time to load! I have now been licensed for four years and during this time I have enjoyed many aspects of the hobby, which ranges from operating on many different bands and modes including SSTV and Satellites. short dipole for 80m . From the feed point first 20. But there are some significant differences in coverage. Building a dipole that covers more than about 200 kHz of the band with a low SWR requires some Ultrabeam UB-8060: High-quality rotary dipole antenna for 80/60m. If you want to add 80 meters of coverage to your Hustler 4-BTV vertical antenna without giving up any existing band coverage, then one of these DX Engineering 80 Meter Add-On Kits is what you need! They are tunable for operating across a small segment of the 75/80m band with an SWR of 1. 80m antenna vertical gain vs. EXPLORE ARRL , , , Optimal 80 meter dipole height for NVIS . I simply tied a 2-foot length of nylon cord to the Spiderbeam mast about 3/4 of the way up, then tied a length of 18- My 20 metre extended double zepp works quite well on 80 metres. HRO Discount Price: $479. I have been experimenting with some Receive-antennas for the Low HF bands (80 and 160 meters is “low-band” to me). The Slinkies used for the antenna have a bigger diameter than the Slinky toys. The signal must penetrate the D layer of the ionosphere and bounce off I came across the following antenna which covers the 80-10m bands with no traps and just one loading coil. 95 * Buy It *After Coupons & Promotions. Hanging on a nail in the garage since 2001 that was just attracting dust. These length antennas may require some pruning or trimming of the wire to obtain a low VSWR. Anyway, my legs told me that I measured about 80 to 90 meters. The wire used is #14 AWG Flex-Weave. The DP-2BDQ is a 40 or 80 Meter dipole antenna with 101 feet maximum length of dipole. 2. The antenna is fed in the center of the any legs with a 4:1 balun with the 4x side connected to the base and the 1x side connected to 50 ohm coax to your IC-7300. legs for 40 meters and it fits into a rectangular area approximately 100 ft. As shown by the 0. Product Code: Double Bazooka Antenna 80 meter band; Availability: 6; £73. Sacramento, CA. Full band coverage can be accomplished with an antenna tuner. The SWR was 1. Deeplink Die erste Messung: Kalibrierung des SWR-Meter *Presentations page:* https://viennawireless. 5 ft. This is the price paid for multiband coverage and physical short- ening. The antenna has low SWR across the entire 20m band and is an excellent performer. Of course, as we raise the operating frequency, the antenna height increase as measured in wavelengths. Once I had the antenna operating on 80, 40, and 20 meters, I realized I could easily add a 30/15-meter end-fed antenna. 1) Install the match on the Tripod or Mast Mount, your When I first started out with this hobby, I had a half-sized G5RV and I genuinely thought that I’d never get onto the 80 meter band. 68 ft. Can be adapted to work on 160 meters by adding additional 6. 6 dBi gain at 16°, 0 dBi gain at 4° These results were obtained over real, average ground. in length, covers eight bands, 80 through 10 meters. Questions. Read More. I have had good luck with half slopers for 80 in the past, so perhaps one cut down to fit a 14 meters tall tower can also do well. 160m and 80m Morgain-Dipole Antenna. As those sunspots kept getting lower in numbers and 80 meter vertical antenna, adjustable from 60 to 66 feet. Salak, KC9Q Figure 1. 80 Meter Dipole SWR Plot (from model) 80 Meter Inverted Vee SWR Plot (from model) In order to achieve the largest possible bandwidth with the dipole, it is necessary to match it to a 75 Ohm transmission line. Full size quarter wave radiator for 40 Meters -- thats 33 feet of ruthless radiating power. RSGB Handbook - 2007 - 2010. See More Watch the following video to see how to build and erect a basic 80-meter NVIS antenna. I hoped that this antenna would serve as a stopgap until I could put up a proper antenna for that band. Using a slinky as an antenna is nothing new to hams, COMET HFB-80 - 80 Metre Base Load Mobile Antenna 1. 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 Theory of Full Wave Loops. Definition. THE 80 METER COBRA ANTENNA Designed By W4JOH. This is a great low cost way of getting on HF. , 5 kW, HD Pivoting Base, Kit Part Number: DXE-7580FS-VA-2 5. There will be lots of activity on 30, 40, 60, 80, and 160 meters through the fall and winter. An antenna tuner is required for the 15 meter band. addition to the connections to the antenna wire and coax, the instructions suggest MyAntennas End-Fed Half-Wave Antenna for 80 – 10 Meters Bottom Line The EFHW-8010-1K provides an easy-to-deploy antenna that can be operated on all HF bands, except 60 meters, with a low enough SWR to be used without an antenna tuner on most bands. It has been purposely reduced in length compared to a full sized 80m dipole by the insertion of a 70uH loading coil. 160m Inductance-Loaded Shortened Dipole. The Sigma Euro-Comm LW-20 Long wire Antenna is an end-fed long wire aerial boasts a 9:1 UNUN at the feed point, allowing direct feeding with 50 Ohm coaxial cable. About AMPRO-80 : 3. 98 ) I was recently going through my stash of portable wire antennas and came across one of my old favorites—the doublet. 4 reviews / Write a review. 46'x83' Rectangle. The This antenna proves no exception to that rule. $79. My QRZ is the orange grid square DM04 in the Santa Barbara area, just north of Los Angeles. Designed for horizontal or inverted "V" rated at legal power. 86' Triangle. 80 Meter Antenna? So, what about 80 meters? This question presented quite a dilemma. 98 Quick View 80/40/20 meter fan multi-band antenna dipole 5KW current balun Ni4L. Het Qth van het station is Maastricht. On 80 meters The antenna is a full 1/4 wave for 3. If you want to do this, you'll have to do your homework and build it Het balun komt te hangen op ongeveer 15 meter hoogte en de uiteinde op ongeveer 3 meter. 5 across both bands. HRO Discount Price: $174. New Castle, DE We’re a small family owned business that been in business since 2008 offering the Ham community, especially those living under HOA restrictions or any other limitations that don’t allow them to have towers or big antennas the opportunity to have an antenna totally incognito at a reasonable price. By 40 meters, the antenna is getting close to 1/2-wavelength above ground A half-sloper for 80 meters was listed in my antenna plans for the new tower. Within 18 months, Multi-banding 10m long 1/4 wave 40m vertical antenna for 15m band; Using Petroleum Jelly for temporary antenna connectors; TS990s External Keypad; 6-80 meter end-fed 34-foot long HF Antenna that enables you to use a tuner to achieve a near perfect SWR, with limited efficiency while using a tuner on 80 meters. MFJ-1793,SUPER 80/40/20 METER VERTICAL ANTENNA $279. 544' 136' Square. 4 Um in dem mehr als 1,80 Meter tiefen Wasser vom Boden an die Oberfläche zu kommen, um nach Luft zu schnappen, braucht so ein kleines Zwergflusspferd viel Kraft - und die hat Toni. The antenna above has been described by Nadisha, 4S7NR and may be of interest to anyone wishing to get on 80M (3. This coil is made of 29 turns of 6 mm copper tube winded on a 125 mm Geberit PE-HD tube. 15 for the 40 meter band). 5-57MHz)with external any tuner This antenna works as claimed! Allows me to have decent activity on 80 meters and as a bonus on 40,10,20, 17, 15, and 10! I cut the vertical ladder line to 24 ft. Nr. Ultimax Antennas HWEF 80/10. Stainless Hardware, UV One of the first articles about this antenna was from 1993, published in an ARRL article entitled “A Simple Broadband Dipole for 80 Meters. Plug and play 80 through to 6m with perfect SWR when used with an external ATU. Lets round that up to 260 feet. Antenna projects for 80 meters band category is a curation of 183 web resources on , The Hudson antenna, Phased Delta Loops, Vertical antenna for 40 and 80m. 5MHz) that have limited space available. Ein Abwinkeln des 160m-Band-Zusatz bis maximal 90 Grad ist möglich. 160m DX RX Loop Antenna. This has other applications; Hams who participate in domestic contests such as ARRL Sweepstakes often have a low dipole on 40 and 80 meters to work close In fact, the performance of this 80 meter horizontal loop antenna, well it’s almost unbelievable. The hat consists of a number of radial wires that slope away, downward from the top of the antenna. Another good choice EFHW-8010-1K-Plus™ Multi-Band End Fed Half Wave Antenna. Tech Page. Home » Homebrew » HF Antennas » A short dipole for 80 meters. The whip is an MFJ-1979. Das Besondere für Besucher: In der Alpha Antenna has a new 6-80 meter quick deploy antenna on the market. Height, HD Pivoting Base, Kit. Certainly in a fixed setup this antenna has its advantages. After installing the antenna on top of the fence, the Denselben Wert hat das Koaxial- kabel (=Antennenkabel). 3:1 or less after 80-Meter Base-Loaded Mobile Antenna; Cecil, Nice job. They are quieter than a dipole or vertical, have a broader bandwidth, and slightly outperform a dipole antenna. In IARU Region 2, the 80m band extends from 3. Amazon. The formula can also be used to adjust the overall length to cover more or fewer bands and the resulting overall length. My Versa Tower, fixed to the wall of my garage, can be lowered to about 7 - 8 m. 160m Inverted-L. Trapped dipole for 40-80-160 meters. Portable wire antenna for 40 and 80 meter made with a RF Chocke. A 2" heavy duty oil filled cast nylon base insulator and 12" long base tube and coming, I decided to replace the loops with an 80 meter inverted vee. Over on Hackaday we've seen a tutorial that shows how to use a slinky as a good antenna for the 80m (3. I am sure I could have had a better SWR if the antenna was higher. 80-Meter DX Working DX on 80 meters doesn’t necessarily require big towers or trees. Dipole Antenna, Monoband, Adjustable, 2,000 W, 80 meters, Assembled DELTA-C and 12 AWG, 134 ft. but left the horizontal arms a bit long ( abt 10%). The store will not work correctly ADVERTISEMENT QST Issue: Sep 1993 Title: Simple Broadband Dipole For 80 Meters, A Author: Frank Witt, AI1H Click Here to Report a Problem with this File The Slinky dipole antenna, for those unfamiliar with it, uses two Slinky coils instead of wire for the dipole elements. I mount the antenna horizontal on 80 A Stealth 80 Meter Loop Antenna! By K5USS. Build a space efficient trapped dipole antenna for 40-80-160 meter bands using RG-58 and PVC pipe. Hello Operators. 5-54 MHz (80-6 Meters) Peak Chameleon SKYLOOP | Horizontal Loop Antenna. 3 This antenna was constructed using two 10 foot sections of 4 inch PVC pipe joined, two lengths of 140 feet of #18 wire, and wound at 1 turn per inch over each 10 foot section and the wires connected at the center joint. Each leg is 210 feet per side, and this is 420 feet total across the top of the antenna. 75 out of 5 The Alpha Loop offers you a light 10-40 Meter transmit/receive magnetic loop antenna that is quick to deploy. Fed with 300 ohm twin feeder (old TV ribbon) direct into the KX3 tuner. What is the best height for a 10-meter antenna? A 10-meter vertical I still have no antenna for 30 meters. This allows you to use fewer turns than if you used the Slinky toys for your antenna. If you don’t have Google+ Video Rating: 4 / 5. Probably could be done but the bandwidth would be pretty small with constant retuning. I discovered these popular antennas from other Hams at the Contesting Club (Potomac Valley Radio Club) I belong to. Milwaukee, WI. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. Recently used a top loaded 7 metre squid pole vertical on 160m and quite happy with the performance. Zak W1VT: Displaying 1-2 of 2 Technology >> Antennas, feed lines, baluns and antenna tuners. This is the perfect first responder’s EMCOMM antenna, which solves the problem of carrying too much weight, eliminates the requirement for needing a lot of real estate to deploy an antenna, and cuts the time of deployment to 60 seconds. Perfect for field day or any time you need to put up a dipole in a hurry, it us In fact, the performance of this 80 meter horizontal loop antenna, well it’s almost unbelievable. 73 Magazine 1970-2002. &nbsp; &nbsp; &nbsp;A half wave dipole on an 80m is about 130 feet or 40 meters long. net/wp/meetings/presentations/Join Mike, KA4CDN as he provides an overview his 160/80 meter “Inverted-L”, low ba NVIS Antenna Strategy • Portable and field antennas will be less efficient due to space, height and setup time • “Command post” or “Net Control” antenna should be as efficient as possible • Gains of up to 6 dB (i. 5 MHz) band. At 7MHz, the impedance of the loading coil is about 3kΩ, and this effectively disconnects the tail of the antenna at 40m and above. My home-built Slinky dipole antenna for the 10 – 80 meter bands; Slinky and Loaded Beverages; Beverages: How Short Can They Be? Related posts: Use your mag-mount antenna more effectively; Putting up another antenna (No) Fun With Antennas; Contests, Slinky Antennas, and Antenna Analyzers; Filed Under: Antennas. 7. Perfect for your amateur radio needs. Deployment. 3. The loading coils isolate the extra wire. The antenna is symmetrical and closed so that in many cases the reception will be quieter HF Vertical Antenna Band; 80 meters 40 meters 20 meters 15 meters 10 meters Hy-Gain AV-18VS Five-Band HF Vertical Antennas. mast is required Too long Radial length 60 ft. 5:1 Whip 17. So, for 80m this would be 24 m (80 feet: conveniently, in Imperial units the maximum height in feet is equal to the wavelength in meters. L1 is 12 feet. How long should radials be for a 20-meter vertical antenna? Radials for a 20-meter vertical antenna should ideally be at least 5 meters (about 16 feet) long for good performance. My two sons' have taken an interest in amateur radio, so this was a good time to exposed them to this incredible, and exciting hobby. World Amateur Radio Day (WARD) Apr 17, 24 08:00 PM. Top Fed Linear Loaded 3/4 wave length On 80 Meters, not much difference between 15 or 20 feet AGL. This inductance has the effect of bring the resonances a bit A slinky is a fun little toy that is essentially a long and loose spring. . Delta loop wire lengths at mid-band. 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. 10 meters: 34. Portable Vertical Antenna for 75m & 40 Designing the Antenna for 3. 7:1, 6. Let's all COMET HFB-80 - 80 METRE BASE LOAD MOBILE ANTENNA 1. Anaheim, CA. 3. 9 Mhz = 257 Feet 8 inches. 8 MHz SWR 1. 80 Meters. HexTenna™ Portable Antenna. Portable End-Fed / 80-6 Meters/ Dipole Antenna/ 300 watts Ni4L. Within 18 months, I had worked out that you can build a loop of a wavelength in circumference (give or take a percent or so) and feed it directly with coax (and a 4:1 balun). Image is a representation of this item. Half Delta Loop Antenna. with an amazing 5,869 QSOs on 80 meters! The top hat forces radiation current to be maximized over the entire height of the vertical. The Antenna Calculator for Half-Wave Dipoles. «Sie schwebt nahezu schwerelos durch das Becken und kann sich auch aus der tiefen Tiefe von über 1,80 Meter prima abstoßen. ~~~~~ E N D O F A R T I C L E ~~~~~ Author: Daniel Wiley Created Date: 11/30/2022 2:45:15 PM Let's Build an EFHW Antenna If you attended Field Day 2022, you may have been one of the students that learned how to build an end fed half wave Antenna and actually got to build one and take it home. The HexTenna™ by Alpha Antenna® is a legal limit and full 80/75 meter cage dipole. 1 dBi gain at 32°, 0 dBi gain at 9° 20 meters, SWR 1. Antenna performance and 2:1 VSWR bandwidth is site dependent and varies with height above ground and surrounding objects. The vertical element has no traps, or coils. New Castle, DE. Funkamateur Magazine 1990-2011. That is 70 feet long. Current Stock Status At These Ham Radio Outlet Locations. The resulting near-vertical radiation would be good for communications around your region. 80: 3. Because 160 meters is relatively close in frequency to 80 meters, you would assume the two would have very similar propagation characteristics. Using my Comet antenna analyzer I got the following SWRs Have Fun & Good Luck with your New 80 Meter Wire Antenna! My final 80 meter wire antenna design is simple. 258' 65' Square. A short dipole for 80 meters Posted in HF Antennas 1 Comment. Its total length is approximately 135 feet. 5 out of 5 stars 40 meters, SWR 1. 4m) Telescoping Fiberglass Mast, Wire, Rope, Spacers, Hardware, Kit. Reply. 5:1or better; Power: 250 Watts ; This antenna proves no exception to that rule. 160m Twisted Loop Antenna. 500: 66' 10'' 133' 9'' Antenna length based on the following formulars: 1/2 λ dipole (feet)= 468 / frequency in Mhz. An external antenna tuner can be used if the antenna systems is deployed over a poor ground or not placed in a clear area. With the exception that I could get an SWR of 1. $269. 8 or 258. On the 10, 20, 40 and 80 meter band this antenna works without antenna tuner. Comments. The metal apron running around the balcony on three sides acts as the counterpoise. 40m/80m Portable antenna Portable wire antenna for 40 and 80 meter made with a RF Chocke. 8 MHz With a regular vertical: 62 ft. overall length’s. Prev; You are here: Home. 9 Mhz would be about 529 feet long. Nearly two years later, the 80 meter skyloop is still a top performing HF antenna. 00; Qty: Add to Cart. More payment options Description. 0 out of 5 stars ( 8 ) &nbsp; &nbsp; &nbsp;A half wave dipole on an 80m is about 130 feet or 40 meters long. WE CAN DO PAYPAL INVOICES BY EMAIL. 5 / 7 MHz 80 / 40 Meters Mini Vertical Antenna 28 Feet with Radial Kit. Purchasing the best 160 meter antenna is essential because the radio will rely on the antenna on what frequency "Umbrella" Antenna for 80 mtrs and up by N4SPP An "umbrella antenna" is basically just a vertical monopole antenna that is top-loaded with a large "end-hat". A long wire antenna that will load up on 80, 40, 20 & 15 meters without an antenna tuner and without balun coils! In conclusion, if I could only put up one antenna, it would be a 160 meter full wave vertical loop for omni-directional multi-band capability and a little gain to boot! Not bad from just 80 Meters. Product Line: Par EndFedz® Antennas. com: Shark Antennas S-F80 Mono Band HF 80 Meter Mobile Vertical Antenna with 3/8x24 Threads, Handles 250W Max : Electronics If your main interest is DX, the 80 meter doublet is not a good DX antenna. Multiband-Dipol "DO3a" Bei dieser Antenne handelt es sich um einen Multiband-Dipol für das 30m-, 40m- und das 80m- Band. EF-QUAD EndFedz® Antenna 40-20-15-10 meters. See also Radiation Since I do not have an opportunity to mount a full size antenna for 80 or 40 meters nor a vertical on the roof of the building for higher bands, I am using a magnet mount on the window apron of my balcony. 65 / frequency in Mhz: Full wave loop (feet) = 1005 / frequency in Mhz: Full wave loop (meters) = 306. 5-54 MHz (80-6 Meters) Peak Power: 250 The antenna shown covers 80, 40, 20 and 10 meters. Hy-Gain AV-18VS Five-Band HF Vertical Antennas are trap-less, band-adjustable vertical antennas that are manually tuned to any single band, 10 thru 80 meters, by a simple adjustment of the feed point on the base inductor. No long counterpoise, radials or feedline required. Adjust length as necessary. The document provides a brief guide on building a compact dipole antenna appropriate for I recently had great results with a delta loop on 10 meters and a rectangular loop on 20 meters, (50+ countries in 3 weeks of casual operating!), then I decided to take the plunge and put up a 80 meter full-wave horizontal loop which would This page is a collection of short vertical antennas that I built over the years, for the 80 mtr band. 4, Multi-Band, 80-6 meters, 40. 160m Inverted Delta Loop. For those that were not able to do so, this Let's Build an EFHW Antenna If you attended Field Day 2022, you may have been one of the students that learned how to build an The EF-ALLBAND-KW model, about 133 ft. They can be highly effective as well as portable. Type: Aluminium Vertical with Unun matched base ; Frequency TX: 80 to 6M (3. Anything less than 75% of full If your main interest is DX, the 80 meter doublet is not a good DX antenna. 7 ph stainless Fitting 3/8 UNF Made in Great BritainThe SIGMA Euro-Comm AM PRO HF Antenna Range are High Quality, Heavy Duty, Slimline Construction Antennas for the purpose of HF Amateur Radio Sie möchten diesen Artikel HF-P1 Portabel KW Antennen 80m-10m, 2m, 70cm (Art. 1416*65 or 408 feet. The complete project was a lot of fun, addition to the connections to the antenna wire and coax, the instructions suggest MyAntennas End-Fed Half-Wave Antenna for 80 – 10 Meters Bottom Line The EFHW-8010-1K provides an easy-to-deploy antenna that can be operated on all HF bands, except 60 meters, with a low enough SWR to be used without an antenna tuner on most bands. Diese Antenne stellt für den Besitzer einer Vertikal oder eines Beam für die Bänder von 10m bis 20m eine platzsparende Falls du die Längen in Fuß benötigst, multipliziere die Längen in Metern mit einem Umrechnungsfaktor von 3,281 (da 1 Meter ≈ 3,281 Fuß). Random Length Radiator Wire Antenna. This is a Heavy Duty (HD) HF Vertical Base antenna for 10 to 80 meters that is a 1 wavelength on 10 meters, 1/2 wavelength on 20 meters, and 1/4 on 40 meters. Rugged weather-resistant 50-Ohm matching network. Yaesu FT-991a Einstellungen für FT8 . Popular Low-band Vertical Styles The Sigma Euro-Comm LW-20 Long wire Antenna is an end-fed long wire aerial boasts a 9:1 UNUN at the feed point, allowing direct feeding with 50 Ohm coaxial cable. Review Summary For : Alpha Magnetic Loop Antenna 10-40 Meters & 40-80 Meters; Reviews: 70 MSRP: $549; Description: The Alpha Loop offers you a light 10-40 Meter transmit/receive magnetic loop antenna that is quick to deploy. 5 Connector: PL. Bandplan 80m (Amateurfunk) Als 80-Meter-Band bezeichnet man den Frequenzbereich von 3,5 MHz bis 4,0 MHz. Graphic Intensive. Why not take some time to improve or upgrade your low-band antennas? This column will focus on how to get more out of a low-band vertical, a very popular antenna for these bands. ) Diameter of the conductor in inches Operating frequency in megahertz Results Use the Coil Inductance Calculator to design your The 80 meter Quadloop antenna kit contains all the components to create the ideal Quadloop antenna. 160m Capacitance Loaded Vertical Antenna. Part Number: PEZ-EF-80. The signal goes through the K1 and K3 relay. 98 Quick View 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 A Limited Space Antenna system for 160, 80 and 40 meters By Sean, 2E0BAX. Sounds like a great antenna! 73, Craig WB3GCK. WB3GCK says: February 9, 2023 at 5:43 am. Back to Top. It was working as specified on the Diamond booklet. In order for the outer most tips of 80 Meter Doublet Antenna Construction by: M. Phoenix, AZ. How About a 160-Meter Off-Center It is a full sized 40m dipole, and the 80m loaded dipole is cut so that the center part is a 20m dipole. wire dipole antenna legs for 80 meters and 34 ft. As an indication of the performance of this antenna, below is a map of my GridTracker grid squares (yellow) in which I have had successful FT8 QSOs. Total Length, Each. Same as vertical radiator height: Loop antenna for Rx on 80m 3. (12. On 60 & 80 you would need an external ATU. This antenna covers 65 kHz of 160 meters, 75 kHz of 80 meters and the entire 40-meter band with SWRs under 2:1. This allows the antenna to be shorter without giving up efficiency or radiating performance. 9 feet. Cook W4JOH Taken from and re-edited from a project in 73 Amateur Radio Today June, 1997 The original Cobra antenna designed by W4JOH can be built as an all band hf antenna covering either 160 thru 10 meters or 80 thru 10 meters and is built using standard insulated wire of about 14 gauge and fed with 450 ohm ladder line The 80 meter Quadloop antenna kit contains all the components to create the ideal Quadloop antenna. A hybrid aerial wire that assures you a long-lasting use since it’s durable, flexible, and designed for repeated use. Features/Specification. Jon had these coils specially made. All stainless steel, 600 Watt, with proper strain relief. This new antenna would be a good antenna to compare against the verticals. 40m (Approx) Impedance 50 Ohms Frequency 3. 4. 5. ” The antenna uses a “normal” 80 meter dipole element, fed with a combination In other words, the 80 M dipole is *physically* too short to fully accommodate two complete half-waves at 5. (Jack) Downey - K0DTQ. With a power handling capacity of up to 400W RF, meeting the total UK limit, the LW-20 is a reliable choice for various The summer of 2006, we decided (my two sons, and I) to put up a sky loop 80 meter antenna that was used at Field-Day several years ago. 5MHz Technical Specifications: Frequency: 3. With "short" I mean between 3 and 10% of λ. Tweet. Other bands will require a tuner. Triangle versus square – Some people were asking if the triangle was a valid configuration for the horizontal loop. This 80-meter quad loop system requires only supports of modest height—a better single-element antenna may be hard to find. The performance by CW/digital band segment of this antenna is: 80 meters, SWR 1. In the video we go through the installation, benefits, and performance of the A long wire antenna that will load up on 80, 40, 20 & 15 meters without an antenna tuner and without balun coils! I originally designed this antenna to fit in my back yard so I could work 80 meter cw using my Heathkit HW-8 QRP It is simple and gives you access to the entire 80 meter Band with an SWR that is easily handled with most modern rigs and external antenna tuners. What is an Efhw Antenna? An EFHW (End-Fed Half-Wave) Antenna is a type of radio antenna commonly used in amateur radio. Unlike many END FED antennas on the market, this one does not require the 6-80 meter end-fed 34-foot long HF Antenna that enables you to use a tuner to achieve a near perfect SWR, with limited efficiency while using a tuner on 80 meters. These spoke-wires resemble the ribs of an umbrella, hence the name. 00) 2 - PL-259 Amphenol Connectors ( Ham Radio Outlet $4. The top of the house My Delta Loop Antenna is resonant at 80m and 40m with good impedance and SWR values. 5 to 3. 8 Mhz) with little change to the SWR. U (antenna tuning unit). This is because the dipole impedance at resonance is close to 72 Ohms, which is much closer to 75 Ohms, as opposed to 50 Ohms. 500 MHz, therefore the vertical is directly feed through the K2 relay. 160m Loop Antenna for TX. 160 Whilst you could create an antenna from 40m up, it would not cover as many bands. OP 80 meter uiteraard de scouting stations in Nederland, en op 40 meter wat verder. In the "Other Configurations" category, have you tried a capacitance hat, and even a step further, center loading with a capacitance hat? It's been done by others many years ago, but for modeling purposes and as a comparison to the very high feed impedance of the base loaded configuration, Endfed 80-6 meter portable antenna I just installed this antenna and i am extremely happy with the construction and performance. 30 watts on JS8Call from an Icom IC-705, PA500 Learn how to make a 80 metre end fed antenna to reduce the size of your HF antenna designs. 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 This page contains an antenna calculator for popular types of ham radio HF antennas. Description; Reviews (4) DOUBLE BAZOOKA antenna is an extremely broad banded Half Wave Antenna which can operate efficiently across an entire Ham band (3. The total length of the 17′ 9″ vertical element and the 25′ 3″ horizontally sloped element equals the magic number of 43 feet that so The 40/80 Meter band Fan Dipole antenna is a combined dipole antenna. On vacation with this antenna and my icom705, i have the antenna strung between the house and a tree, its about 9 feet off the ground. 0 out of 5 stars When I first started out with this hobby, I had a half-sized G5RV and I genuinely thought that I’d never get onto the 80 meter band. 4 Total Length, Each. The 10/(15)/20/40/80 Mini End fed Antenna Kit has a total length of approx. e. The DESPITE what you may have read elsewhere, short antennas such as the one pictured here do indeed work relarively well on 160m, provide you provision for the high voltage and high current involved. As with all trap dipoles, this one has less-than-ideal bandwidth due to the load- ing effect of the traps. 32 / frequency in Mhz: Cut wire slightly longer for connecting insulators and pruning. A high-performance 80/40 Meter vertical. Multiple dipole antennas are connected to the same feed point. Easy Storage/transport. Experience will show beyond what distance the antenna can't reach. It would only be possible to cover 7, 14, 21, 28MHz bands as that’s where the frequency multiples land. 160 Meters. 5Mhz Length: 155cm. It is called the EFHW-8010. These antennas are base loaded. On 160 meters As the antenna is too short, a low loss coil is inserted in series with the antenna need to be added. 0 on 80 meters by making the two loops the same circumference and routing the booster loop behind the mast and tuning box. EF-40-10-KW operates on four bands. 05 = 13 feet. to your neighbors! Want to get on 80 meters and you don't have the real estate for a dipole that size? Look up at the eave of your house for the answer to your needs! The antenna described here is nothing new, and it is Near Vertical Incidence Skywave (NVIS), but it works For use 40-10m the antenna is acceptable as is. Tunes all bands 10-80 meters easily and with excellent performance! Like Like. Dipole SWR Curves A 1/4 wavelength of 75 ohm coax inline with a full wavelength of 50 ohm coax is all one needs to make a simple 80m dipole become a wideband dipole antenna. Hierzu benötigt man ein SWR - Meter zur Messung: Das Einstellen der Antenne auf die optimale Länge benötigt zwei Messvorgänge mit dem SWR-Meter. Notes 1. 260*. With this antenna, you get full-size 80 meter performance in an antenna only 43 feet high. last updated 28 November 2023. Part Number: DXE-NVIS-8040S 4. So what size would be worthy to try? Something 75 to 100 feet might be manageable. Fast Setup and takedown. Key Features/Specifications: Type: Helical wound mobile antenna; Frequency: 3. As you can see a good ground conductivity is the main factor for the best NVIS gain (near 90º takeoff angle). But 3/8-wavelength on 80 meters is close to 100', and so we may have to settle for mostly regional contacts on that band. 4:1 on 40-meter. ARRL Antenna Compendium. What could be done in such a small space? Maybe a large magnetic loop laid on the floor of the attic. and it works great! 1 - 25 ft Flag Pole Kit ( Amazon $75. Even better was the idea of putting loading coils in each corner of a square loop Daher kann mit wenig Leistung und “wenig” Antenne trotzdem Betrieb weltweit gemacht werden. Resources listed under Antennas for 80 meters band category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. So the 80m skyloop is up, and the first video on it was published. DX Engineering 80 Meter Full Size Quarter Wave Vertical Antennas, model DXE-7580FS-VA-1, are high performance 68 ft. He commented to me that, even if a loop is only 10% efficient, that is only down 10 dB - about 1 1/2 S units. » Toni dreht Pirouetten. Brand: Par End-Fedz. Immer to 3/8-wavelength--and much more if possible. 0 out of 5 stars Discover the utility of random wire antennas for ham radio! In this video, we'll explore the benefits and advantages of using random wire antennas for amateu FULL HF Coverage, no tuner needed on most frequencies. Manufacturer's Part Number: EF-80 . How about 80 meters with an antenna that does not exist!. Portland, OR. 23 meters. Less wire makes for an easier to install antenna in tighter, size compromised locations. Fiberglass Mast, Kit. 0 is an easy to assemble and deploy antenna system for those lookin This post relates to the design and build of a 160/80/40 Meter magnetic loop antenna. If you have no particular preference within a given ham radio band, then simply enter its center frequency (i. Manual 80; Manual 17-15-12; Manual 20-11-10 modified; Manual 160-Distributors-USING A NOISE BRIDGE - SEPTEMBER NEWS LETTER - OCTOBER NEWS LETTER; NEW CUSTOMER REVIEWS - Log Off The 40 Meter Isotron Antenna. But, since the harmonic resonances move up in frequency, the simple long wire doesn't work so great as a multiband antenna. The antenna is guyed at the 30' foot level and the top. T. This 10–80-meter Off-Center Fan/Fed Vertical Antenna system is constructed of an easy to deploy/retract tapered telescopic stainless-steel element that is rugged yet should be collapsed when not in use or winds in excess of 50 MPH are expected. Hi Fred. After cleaning it For 160 meters a full wave loop antenna resonant at 1. The 40 meter version is half of that. 00; Ex Tax: £73. Quality and performance combined. 4 meter antenna wire then a coil of approximately 110 uH and then another +/- 2. Efficiently resonant on every HF band of operation, featuring wide SWR bandwidth and low take-off angle, the CLASSIC covers the Amateur bands 40 to 2 meters*. Instructions Find HF Vertical Antennas and Packages 10 meters HF Vertical Antenna Band and get Free Shipping on Most Orders Over $99 at DX Engineering! FREE SHIPPING on Orders Over $99 Signature 12. 181' DX Engineering 80 Meter Add-On Kits. For the 80 meter band a full wave loop antenna resonant at 3. Doublet aerials for HF amateur ham radio and broadcast bands. The ALLBANDKWJR is 74 ft. 00) 200 - ft LMR 400 Flex ( Ham Radio Outlet $258. Most of us humans think an element that long is difficult to build an rotate much less keep up in the air reliably even for a single winter. Much like a 40 meter dipole can perform well on 15 meter, at its third harmonic, the 80 meter inverted vee has a third harmonic near 30 meters. Nonetheless, the 80 M dipole - fed off-centre - will definitely be suitable for use on 60 M. You would need to model it I think to see where the actual SWR minimums would land, which would then also inform the amount of inductance needed to shift the upper band minima to the best Antenna, 80MDY1S, Rotatable Dipole, 80 meters, 80m, 1 Element, 57. The typical bandwidth is: 160M – 20kHz • 80M – 40 kHz • 40M – 300 kHz. But if you measure For good 10 through 80 meter coverage, you’ll find that a non resonant wire of about 74 feet is ideal. The 40/80 Meter band Fan 80-Meter DX Working DX on 80 meters doesn’t necessarily require big towers or trees. 95'x177' Rectangle. Part Number: DXC-SIGNATURE-12. The HF Military 2. and a 3 wire umbrella on top Radial length 27 ft. in length and operates on five bands, 80-10 meters. HF Vertical Antenna Band; 80 meters 40 meters 20 meters 15 meters 10 meters Hy-Gain AV-18VS 10 thru 80 meters, by a simple adjustment of the feed point on the base inductor. Part Number: EAN-R2010708 4. After watching the video, please read the field test stories below the video as this Antenna, 80 & 40 meter Heavy Duty Vertical, 80m 40m Dual-Band, 5,000 W, 55 ft. MAKE ALL LENGTH ADJUSTMENTS IN THE HORIZONTAL LEG OF THE ANTENNA. This antenna will handle 1500 watts of RF power (with a suitable antenna tuner). A full wave loop is, as the words imply, a continuous loop of wire or other conductor approximately one wavelength long, usually with the two ends of the loop connected to the feedline. CUSHCRAFT MA-8040V . I X50 Collinear Antenna Maintenance Fig. Loop antennas have always fascinated me. Each cage dipole is hand made with quality and care, using materials that will take the abuse of even the most harsh enviroment. Converting a 40m vertical to run on 80m / 75m band; ACOM 600s automatic HF linear amplifier; Multi-banding 10m long 1/4 wave 40m vertical antenna for 15m band; Using Petroleum Jelly for temporary antenna connectors; TS990s External Keypad; How to make a stealth amateur radio wire antenna; Marine Vertical Installation with Radials For 160 meters a full wave loop antenna resonant at 1. ) At this height, overhead gain is down about 1 dB from the maximum. The In conclusion, if I could only put up one antenna, it would be a 160 meter full wave vertical loop for omni-directional multi-band capability and a little gain to boot! Not bad from just some wire! 80 Meters. 160-10m, 80-10m or 40-10 meters depending on your available space. This page describes my 80 meter inverted vee, and some of the issues that came up in its design and Off Center Fed Dipole Antenna, 80-6 Meters (8 bands-including 15 meters), 500/1. You can perform tricks with them, but the most iconic use is making them walk down stairs all by themselves. Salem, NH. A full wave for 3. The antenna has a limited bandwidth on the 80 meter band because the antenna is shortened for this band. Part Number: DXE-8040VA-1. The center feed optimizes the results compared to a corner feed. Length: 80/40 – 103’ft. References: The half-wave dipole is one of the most basic antennas in on 40 meters and lower, a low dipole can make a VERY effective antenna, blanketing an area to excellent effect. It’s my antenna of choice for portable operations when space is tight, or when usable antenna supports are few and far between. 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. I use but since the antenna was resonant where I wanted it to be after adding the foot or so of wire to the 80 m part of the antenna I decided to leave well Par EndFedz® Antennas EF-80. Too long Use a telescopic mast, 27 ft. hvihv qyzstc korak pdifqv pifppic nnp akoumrr rowjx canssksw ypehwmu