80 Meter End Fed Antenna

If one wants best performance on 40 meters then 48 feet is the length of choice. " This is essentially a dipole cut for the lowest frequency of interest and fed with 450 ohm ladder line. For this I use my second tower which is shunt fed as a vertical. Only the kindness of my next-door neighbors (who let me use one of their trees for the antenna) kept me on the air. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. 160m Top Band End Fed Antenna -G3YEU Coil Details:- 5" (127mm) diameter using 16 SWG bare copper wire. Use a VSWR meter to check the desired band edges and centre frequency as you tune. This means that the antenna will always have a feedpoint impedence appreciably higher than 50 ohms and will not require much of a ground system to perform adequately. This is the basic principal behind most commercial vertical antennas, that often become the solution to the SPACE problem for a reasonable antenna on 80 meters. The ULTIMAX Half-Wave End-Fed antennas are the perfect antenna for those that prefer not using an Antenna tuner. To make room for the array, I first relocated t the original 10-80 450 ohm ladder line fed delta loop to the South over the end of the pond as shown below. 5-53 MHz (80-6 Meters) An external tuner is needed for a few bands. 10-160 meter J-Pole Sr 60 foot end fed HF antenna. Introduction. The 92' wire travels up to the main support, about 25', and then horizontally for the rest of the run. This is an End-Fed Half-Wave (EFHW ) antenna for 80/40/30/20/17/15/12 and 10m bands. 40M NVIS Antenna…. I needed a second antenna for experiments and dual monitoring. The antenna's main advantages is its multiband capability. Counterpoises. End Fed Dipole 80-6 meter Portable HF Antenna Matchbox System. This antenna is 58 ft tall and is mounted on a hinged base. 6-80 meter J-Pole Jr 34 foot end fed HF antenna. It is an end fed dipole but this one can be used up to 300 watt. in my case: (crank up) tower for the first 10. For VHF/UHF, I rely on a Diamond X3200 Triband vertical. It is supposed to handle 160 meters to 10 meters which is perfect for my application. A full-wave horizontal loop for the 80 meter band at a practical height of 15 meters is a popular antenna nicknamed a “Loop Skywire” that has been in The ARRL Antenna Book for years. 63; Save 80 meter dipole to get e-mail alerts and updates on your eBay Feed. See photo below. In the mean time, I have been using a EARCHI 40-6 meter end fed compromise antenna. Make an end-fed antenna for 80 metre operation The physical length of any HF antenna is critical to achieving resonance and good performance on a particular band. Well…I would have quick band changing: The trapped dipole is the way to go!. Presented here is a high-performance, circularly polarized omni-directional antenna that is easy to build, easy to tune, inexpensive, and will work all the mode J Low Earth Orbit (LEO) satellites. 5 to 108 MHz. senza radiali ed ha un basso livello di rumore e un ROS molto basso. end (the WI re farthest from the feed point, attached to the end nay be lengthened or Shortened by the Wire. I ordered by PA3EKE the Hy End Fed Antenna for 20 meter. lower end of the slant wire. 80/40 Loaded Dipole (inverted V, center at 21 feet, ends at 5 feet) 80/40 Resonant End Fed (sloper, loaded end at 25 feet, feedpoint at 3 feet) Test Procedure. Excellent radiation efficiency due resonant design and low loss parts. It is a nice piece of work. Use a VSWR meter to check the desired band edges and centre frequency as you tune. Find many great new & used options and get the best deals for QSO-KING -- End Fed Multi-band Antenna -- 80-6 meters -- Rated 850 W. Start with cutting the radiating and reflecting elements. Whether you're QRP backpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. End Fed Dipole: $37. Put 80 Meters resonance point at around 3. This antenna is 135 feet long using 18 gauge poly-coated stranded copper clad wire. These nests wrap around the TEST switch and somewhat surround the RCVR antenna input terminal. The VSWR measurements of this antenna are made at a height of 10 meters horizontally. The problem with an end fed half wave antenna is that the antenna presents a high impedance, creating a. So I just got the LnR Precision EF-Quad (40, 20, 15, 10 meters) and also just built a window-sill pass through for my coax. The Dipole. My 80-10m antenna is very poor to the same location on 20m so I got an NA4RR Hexbeam to supplement the wire antenna is its a great combo. This is the second antenna I purchased from them. Antenna gain is measured in either dBi or dBd. It is a nice piece of work. End-Fed antenna for 160-80-40 meters band updated - This PDF File desscribes how to homemade a multi-band end-fed trapped wire antenna resonating on the low bands of 160 80 and 40 meters. If fed off center, say at 30%-70% point, impedance is approximately 200 ohms and can be used on multiple bands with an antenna tuner. If it isn't end-fed, then it's usually near-center fed and becomes a dipole antenna instead. I had a good time and I am glad I signed up for the N5A Sprint Duty. 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. The so-called End fed Zepp (EFZ) is often cited as the basis for many more recent antenna designs, and is leveraged to provide and explanation… though few hams understand how the EFZ actually works. 62 m) of Dacron rope. Most of the wire is threaded through the slats of a wooden fence approximately 1. This antenna is the MFJ2990 with its 4:1 balun at the base. Hy End Fed Antennas from the Netherlands is run by Rob, PA3EKE and Ron, PA3RK. EFHW featured in "Stealth. Another is, "Antenna here is a 100-foot, end-fed wire about 15 feet above ground. Portrayed below is a complete and self-contained NEC model of one popular form of the end-fed half-wave dipole antenna. senza radiali ed ha un basso livello di rumore e un ROS molto basso. A multi-band end fed wire antenna presents a potential problem in that a ¼ wave length antenna cut for say the 80 metre band will present a feed impedance of about 70 ohms however when the same antenna is used on the 40 metre band the feed point impendence will be several thousand ohms and therefore difficult to achieve a match even with a. I made some modifications to the construction but I kept the critical parts intact. Introduction. Below is one example of how to build an 80 metre band long wire antenna for a house with a small garden. The End Wire Size can range from 16 AWG to 12 AWG. Here are instructions for making a multiband end-fed half-wavelength antenna that works on 17, 20, 30, and 40-meter bands. HIGH QUALITY. EFHW-8010P- 200W Portable or Stationary Multi-Band End Fed Half Wave Antenna This is a 200W version of popular EFHW-8010 End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. Chameleon Antenna has been a pioneer at rethinking and redesigning portable antenna systems since almost a decade! Pushing the limits of design and manufacturing with cutting edge technology, Chameleon Antenna are known to design, manufacture and distribute products worldwide that are versatile, dependable and built to last!. Note: The Red & Blue colours are used simply to emphasise. A conventional coax-fed, half-wave dipole doesn't provide a low SWR over the entire 80-meter band - an inconvenience for those of us who like to operate phone and CW on that band. Its total length is approximately 135 feet. 80/75 Meter Wire Antennas. RadioWavz EFH 80 (length 125' 8") no tuner is generally required. The basic formula for determining the length of a center fed, half-wave wire Dipole or Inverted Vee antenna is:. That's where our Mountain Tuner comes in! The Mountain Tuner is our neat little half-wave end-fed antenna tuner. I discovered antenna computer modeling as an alternative to the cut-n-try methods. It is 80' vertical, 90' horizontal. Alle onderdelen zijn van nu van RVS deze endfed is kleiner en lichter. My backyard has a moderate slope so that the north end is slightly higher than the south end, but the antenna is 24' about the ground from end to end. Here is the materials list for the 80 meter helix: A 33-foot (10. E' bene inserire un choke di cavo coassiale prima del TRX. Verticals and baluns. In many cases the EFH (End Fed Half wave) fits in to a small pouch, making it extremely portable. SSB and 500W CW. Delta Fed Dipole Antenna 13 18. This antenna is worth experimenting with. The only differences are three: 1. Here's another interesting variant of the familiar end-fed halfwave antenna. END FED HALF WAVE ANTENNA (EFHWA) [HOME] [PICTURES] [ to the page 2 of the EFHWA antenna >>] In my opinion,this antenna is the best solution for portable operations: a single wire,cut at 1\2 wavelength of the desired frequency,fed at one end,therefore without center isolators and coax cable to make it heavy and bulky. End-fed half wave. Unfortunately, this antenna is widely misunderstood. The ROSE 80 CW Transceiver (Part 1 of 3) Build a 5 watt, 80 meter QRP CW Transceiver!!! (Designed by ) A great deal of interest has been generated by my previous design articles, so I decided to go to work on a full blown transceiver design. Evolving from a simple end-fed Marconi for 80m, the idea was to use the opposing. The NB6Zep antenna is a simple inexpensive wire antenna, easy to build, that will yield excellent results on all bands. February, 2006: I built a half-sized, end fed halfwave for 160 with plans to use it during the ARRL 160 meter SSB contest. Results depend on the height of the wire above ground. See photo below. This antenna covers 65 kHz of 160 meters, 75 kHz of 80 meters and the entire 40-meter band with SWRs under 2:1. At 90 degrees the legs of the antenna can be approximately 1. In free space the center-fed half-wave antenna has an input impedance that is a close match to 50 ohm coax and to most radios that have a 50 ohm output impedance. The antenna is rated at. This antenna will handle 1500 watts of RF power (with a suitable antenna tuner). Start with cutting the radiating and reflecting elements. 30 Watts QRP, 80-10 Meters. Other feed ar-. Because the MTR doesn’t have an ATU or a SWR meter and I don’t want to carry anyone of those, I decided to make an antenna that fit the objective: Been light! The search for such antenna endup with the trapped dipole or the linked dipole. Some people needed to use a longer wire than the stock 24 foot wire that comes with it. End-fed half wave. The 80-meter azimuth pattern is taken at an elevation angle of 45 degrees. The original was for 160 meters and I cannot say a bad word about the antenna. Cushcraft achieved a major breakthrough in the development of an HF multiband vertical antenna that has been specifically designed for use with a tuner and amplifier. The end fed feature adds convenience, but does present another issue. End Fed Dipole 80-6 meter Portable HF Antenna Matchbox System. This means that the antenna will always have a feedpoint impedence appreciably higher than 50 ohms and will not require much of a ground system to perform adequately. The current in the last two sections is thus significantly reduced. END FED HALF WAVE ANTENNA (EFHWA) [HOME] [PICTURES] [ to the page 2 of the EFHWA antenna >>] In my opinion,this antenna is the best solution for portable operations: a single wire,cut at 1\2 wavelength of the desired frequency,fed at one end,therefore without center isolators and coax cable to make it heavy and bulky. The double extended Zepp is a dipole type Antenna consisting of two collinear 0. Cul = transformer wire. Results are encouraging but tuning them up can get a bit fiddley. A few months ago I bought a FT140-43 toroid to make myself a homebrew End Fed wire antenna,without the need for a tuner. Holding true to the original Windom formulas, I used a ratio of 37. Amateur Radio antenna pages of Frank N4SPP. Make an end-fed antenna for 80 metre operation The physical length of any HF antenna is critical to achieving resonance and good performance on a particular band. 5MHz) therefore also resonant on second, third and fourth harmonics etc. It is similar like the PAR end fed antenna. Of course, it is easy to raise an antenna 1 to several wavelengths over the ground at these frequencies, but much harder to push an 80-meter wire up that high. Portrayed below is a complete and self-contained NEC model of one popular form of the end-fed half-wave dipole antenna. Here are instructions for making a multiband end-fed half-wavelength antenna that works on 17, 20, 30, and 40-meter bands. The antenna works on the bands as advertised with low SWR. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. What are the directional options for an end fed antenna? The directional options for an end fed antenna include: Single direction - This type of antenna has the least amount of resistance and the longest distance capture for signals in a specific direction. It is 148 foot of wire about 40 feet above ground between 2 tall trees. A relatively low dipole is a more effective antenna for domestic contests. The typical support mechanism for a 20 – 10 meter hex beam is a steel push up mast that costs around $100. The Antenna: The antenna proper consists of a length of copper or copperweld wire, with a center feedpoint. The main category is End-Fed Antenna that is about End-Fed Antenna projects and plans. The PEF 160-10 contains a FT-240/61 trifilar wound, 9:1 UNUN (unbalance to unbalance) torrid matching transformer that will match the high input impedance of an end fed antenna into the range where most antenna tuners can produce good performance. End-Fed antenna for 160-80-40 meters band updated - This PDF File desscribes how to homemade a multi-band end-fed trapped wire antenna resonating on the low bands of 160 80 and 40 meters. Cul = transformer wire. end (the WI re farthest from the feed point, attached to the end nay be lengthened or Shortened by the Wire. W4ZCB is situated on a small mountain in North Carolina. This antenna has a coil in the antenna wire at 20 meter. They are usually power limited, maybe a good thing, with all that stray RF floating around. I modelled the program to find out how it worked. Enter your desired frequency (MHz) of operation (i. We are not interested in looks, but in performance. As typically installed, it is a compromise antenna but great for portable use because it is easy to pack and easy to install. A quality antenna tuner will provide a perfect match on all bands from 80-6 meters. The larger the wire, the wider the bandwidth. I have a friend with a 40-10m half wave end fed that he puts about 15ft high at a local park a mile from me and talks to a friend in Oklahoma from CA on 20m all the time. If it is a straight dipole, fed with coaxial line, what frequency is it cut for? Or, is it a fan dipole? There is no such thing as a dipole for 40 - 10. End fed Zepp. Please excuse the dust – this is under construction like most of the Internet. Multiband Dipole Antenna 10 14. This is the price paid for multiband coverage and physical short- ening. Alexandr Gimanov 96,771 views. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. Once the two end masts were in place, we moved inside to construct the doublet antenna. It uses readily available materials, and has sufficient core surface area to be good for 100W SSB input. G7FEK Limited Space Antenna G7FEK Multi-band "Nested Marconi" Antenna - 2008 Version (rev 5) This antenna was first conceived as a simple dual band antenna in 1988, in an attempt to achieve sensible dual band operation in a small garden of 14m (46 ft) length. Inverted L for 40 & 80 Meters ( end fed ) January (15) About Me. My configuration is inverted-vee style with the apex at 80 feet, the ends about 25 feet high. 80 Meter Antenna up! Boy, this project is really dragging out this is the tower seen in previous blogs, that was torn up back in April of 2016 in a storm. If a capacitor then its value will not exceed 300 pF either. End fed longwire or random wire antenna. This antenna works on 80 - 40 - 20 -15 and 10m. Random Length Radiator Wire Antenna. 160m Top Band End Fed Antenna -G3YEU Coil Details:- 5" (127mm) diameter using 16 SWG bare copper wire. The idea was to test each antenna in as equivalent band conditions as possible. 2) My 40 meter OCFD* fed to the FT857d transceiver was also tuned to 80m thru an identical LDG auto tuner. They are usually power limited, maybe a good thing, with all that stray RF floating around. End Fed Dipole 80-6 meter Portable HF Antenna Matchbox System. If fed off center, say at 30%-70% point, impedance is approximately 200 ohms and can be used on multiple bands with an antenna tuner. HIGH QUALITY Authentic KB9VBR 2 Meter VHF SLIM JIM amateur ham radio J-Pole base antenna ANTENNA TRIPOD 29FT ALUMINUM PORTABLE TOWER MAST KIT NEW HF End Fed Antenna EFHW-8010-1K 1000W 80-10m / NO TUNER NEEDED!! / 130 feet long. Antenna performance and 2:1 VSWR bandwidth is site dependent and varies with height above ground and surrounding objects. 80m END FED NVIS FIELD ANTENNA NG9D. Review (mpn: ef-53 for sale) EF-53 Princeton Meter Fed Antennas Antenna Wire 80 6. This building block approach makes it very flexible as you can deploy it as a vertical antenna, a horizontal antenna, end-fed, dipole, and even a man pack portable antenna. These nests wrap around the TEST switch and somewhat surround the RCVR antenna input terminal. I did 24 hour WSPR runs using 5 watts of power with each antenna on successive days. Signal reports indicate the Bobtail is consistently + 2-4 S units compared to the L into Europe and with less QSB. Antenna tuner is needed on 20 and 17m and to extent the bandwidth on 10m. I like to use a home made current choke to keep RF from coming back on the feedline. The orig­i­nal Jet­stream Multiband 80 - 10 Dipole nev­er had cov­er­age of th­ese bands. Compact 43 ft multiband End Fed antenna usable from 80 Meters to 10 Meters with the use of a wideband antenna tuner. An antenna erected over poor ground (deep shale, granite or desert sand) may appear to be many feet higher over ground than it is. I used a 100 ft roll of 18 gauge twin speaker wire. Also, check out the CAROLINA WINDOM® 80 Compact. Cul = transformer wire. Marconi, Mr. I use an LDG autotuner and it easily tunes this loop on 80 – 10 (all of my QSOs have been on 80, 40, 30 or 20 though). Off-center fed dipole can operate well on even harmonics of its lowest frequency, e. SWR meter, if. Once the two end masts were in place, we moved inside to construct the doublet antenna. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. I know a Ham who has an end fed 1/2 wave antenna for 20 meters he uses vertically, but at QRP power levels. Click Here for free End Fed 6 - 40 Meter Matchbox Antenna assembly instructions (tuner required) A great simple HF antenna for 6 to 40 meters. Extension To make it a multi band (10/20/40/80m) antenna when little space is available:. Connect a few meters of wire to the counterpoise and 40 meters as antennawire. Standard approach for tuning-and-pruning the antenna is to start with the band where the antenna acts as a 1/2-wave end-fed (40 mtrs for the 80-10 antenna, 20 mtrs for the 40-10 version), rather than for the lowest band. It's an 1/8 wave vertical on 160 meters also. All the gobbly gook and being scared off to try I took the info from an old 1940s hand book and built a 1/2 wave single wire end fed antenna for my vintage stack. Before I added 80 meter, I operated that band with a end-fed wire antenna. 648 Mhz 3rd Harmonic Halfwave in space is: 136. Throw one end of the antenna wire, extended with a rope, as high as you can on a three, and walk away. At 88 feet it will tune from 160 m to 10 m with the internal antenna tuner on my IC - 7410. I was making 40 meter contacts of 2000 miles. Eggbeater II Omni LEO Antennas. EFHW-8010-1K Multi-Band End Fed Half Wave Antenna. This means that the antenna will always have a feedpoint impedence appreciably higher than 50 ohms and will not require much of a ground system to perform adequately. outputs or end fed. The basic formula for determining the length of a center fed, half-wave wire Dipole or Inverted Vee antenna is:. 8% for one side and 62. , but it can also be done, which only reaches 80/40 meters. On 160 it's a Marconi. See this link for more info. If fed at the end (a. It would have been my first ever transmissions on this band. The simplest, most cost effective choke is a ferrite ring (F240 size) installed as shown below:. So, why not try convert the 2x10 mtr to a 2x6. This would allow a 130 foot, 75 meter antenna to fit into a horizontal distance of about 95 feet. A quality antenna tuner will provide a perfect match on all bands from 80-6 meters. 92MHz Frequency does not cause either of the two traps to become activated & the antenna behaves as a long wire. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Some houses don't really lend themselves to installing a half-wave dipole. " This is essentially a dipole cut for the lowest frequency of interest and fed with 450 ohm ladder line. Alpha Antenna 6-80 meter J-Pole Jr 34 foot end fed HF antenna [6-80_HF_JPole_Jr_34 foot] - 6-80 METER 34' END-FED ANTENNA The Alpha J-Pole Jr Antenna is only 34 feet in length. What are the directional options for an end fed antenna? The directional options for an end fed antenna include: Single direction - This type of antenna has the least amount of resistance and the longest distance capture for signals in a specific direction. Amateur Wire Antennas : The LNR Precision EF-80 is your simple and effective solution to 80 meters operation. The idea was to test each antenna in as equivalent band conditions as possible. You have to cut a dipole for resonance on each band (hence the fan dipole - google it). length for the lowest SWR at the high end of the band. Description. This is a little long for 80, 17 and 12 meters, but a little short for 40 and 30 meters and just right for 20, 15 and 10 meters. Its total length is approximately 135 feet. •The 52 1⁄2 foot end fed works much, much better on 80, 40, and 30 meters. See Fig­ure 8 for the SWR curves. Working 160M From a Small Lot (and Larger Ones Too) far end • Adding inductance either end -Drill more holes for antenna wires. If it isn't end-fed, then it's usually near-center fed and becomes a dipole antenna instead. 5 turn per 25mm) Number of turns depends on the length of the antenna. 1 It provides useful gain with very simple construction. 80-6M End Fed Wire - 36Ft. Frequency Coverage: 3. See this link for more info. It's automagical! Many thanks to Mr. The resource is currently listed in dxzone. I decided to build a 80 meter, half wave wire antenna that takes full advantage of the phone portion of the band known as 75 meters, also this antenna will not need a tuner. 8 and 21 MHz. Such an antenna/wire can be made very light and any coax is of course not needed. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. This antenna works on 80 - 40 - 20 -15 and 10m. If a capacitor then its value will not exceed 300 pF either. OCF Dipole Antenna for HF. It is an end fed dipole but this one can be used up to 300 watt. Then the antenna mast I installed as a replacement fell down in a snow storm. For operation on 160, an additional two turns are place in series with the 80 meter coil. Bow-Tie Dipole Antenna 14 20. Off-center fed dipole can operate well on even harmonics of its lowest frequency, e. That's where our Mountain Tuner comes in! The Mountain Tuner is our neat little half-wave end-fed antenna tuner. By use of feeders about 66 feet in length it is also possible to use the antenna as a Hertz on 80 and a Marconi on 160, resonating it in each band for best signal-to. A few months ago I bought a FT140-43 toroid to make myself a homebrew End Fed wire antenna,without the need for a tuner. Ham Radio Antenna W3DZZ Multi-band Antenna 80-40-20-15-10m VHF Vertical Antenna as well 80 40 Meter Fan Dipole Antenna also. I've had it for about 4 years and haven't had. Conclusion: The End-fed antenna with a 1:64 Matching Auto Transformer is well worth building. HIGH QUALITY Authentic KB9VBR 2 Meter VHF SLIM JIM amateur ham radio J-Pole base antenna ANTENNA TRIPOD 29FT ALUMINUM PORTABLE TOWER MAST KIT NEW HF End Fed Antenna EFHW-8010-1K 1000W 80-10m / NO TUNER NEEDED!! / 130 feet long. This is a little long for 80, 17 and 12 meters, but a little short for 40 and 30 meters and just right for 20, 15 and 10 meters. Electrically, this antenna is ‘center fed’. 468 ÷ freq (mHz) = Length (feet). Several experimental ham radio licenses were issued for this band. Although this is not a DX antenna, there is plenty of useful radiation for all kinds of excellent 80-meter QSOs. Since my unit was to be used in the field I wanted the option to forego using coax cable altogether. On 80 it's an end fed Hertz. Dipole Antenna - Balun 9 13. Describe your experience with the QSO-King End Fed Antennas by NUØR and tell us why you give it the rating you did (required). Each end fed antenna needs a feed line choke at the radio end of the coax to stop the antenna common mode current (on the coax braid) from getting into the radio when transmitting and also to stop RFI common mode noise when receiving. Due to the high impedance feed point, the antenna. I couldn't hear 80 meters or talk on it. Electrically, this antenna is ‘center fed’. The End Fed Half Wave antenna described is a very good choice for those operators who have limited space and require an effective radiator. 160-6 meters end-fed antenna The ULTIMAX DXTREME end-fed antenna covers from 1. I planned to set up portable and lift the 123-foot wire with some helium balloons and operate in the QRP category. Chameleon Antenna has been a pioneer at rethinking and redesigning portable antenna systems since almost a decade! Pushing the limits of design and manufacturing with cutting edge technology, Chameleon Antenna are known to design, manufacture and distribute products worldwide that are versatile, dependable and built to last!. The shortest wire to easily put RF energy into is a 1/4 wave fed with unbalanced feed line (coax) and worked against an earth ground. 1: The end-fed antenna, the simplest of all multi-band antennas Fig 15. Click Here for free End Fed 6 - 40 Meter Matchbox Antenna assembly instructions (tuner required) A great simple HF antenna for 6 to 40 meters. Steve Nichols G0KYA Contents 1. In the mean time, I have been using a EARCHI 40-6 meter end fed compromise antenna. The parallel circuit used here was chosen because the antenna is so very small, its radiation resistance so very low on 160m. It is a nice piece of work. A shortened multi-band End-Fed Half Wave (EFHW) antenna for 80-10m The 80-10m EFHW This is a shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1. An end-fed zepp will work on its fundamental frequency and on odd and even harmonic frequencies (that is, where the flattop is an odd or even multiple of a half wave). Although this is not a DX antenna, there is plenty of useful radiation for all kinds of excellent 80-meter QSOs. Totale lengte 10 meter Maximaal vermogen 300 Watt Pep met een revolutionair ophangsysteem om snel tijden uw vakantie de antenne op te hangen of permanent op te hangen. MFJ-1984LP, $39. It really is not resonant on any band (close on 15-17), but I would prefer to make it resonant on 60 meters. 5MHz) therefore also resonant on second, third and fourth harmonics etc. This kind of antenna can also be installed as an invertd V or an inverted L that helps fit it into many gardens. End insulators are supplied making suspension easy. If fed off center, say at 30%-70% point, impedance is approximately 200 ohms and can be used on multiple bands with an antenna tuner. In several years or running a short, openwire fed vertical dipole (6m per leg), I have determined that this antenna (in its vertical form) was on par with my full size 80m horizontal dipole at 40 ft. This is im-practical in many instances. 300 Ohm Twin Lead with the ends shorted is an option for even greater bandwidth. Could that mast handle a 40 meter hex? Very doubtful. Similar to my 80/40 resonant end fed antenna, the goal for this antenna was to achieve resonance on both 80 and 40 meters by using loading coils large enough to isolate the 40 meter element of the antenna while simultaneously greatly shortening the space required for 80 meter operation. The original was for 160 meters and I cannot say a bad word about the antenna. K5LAD's Assorted Ham Stuff "I can't work 80 meters, I don't have a good 80 meter antenna" How many hams have made a statement like the title of this piece? Quite a few, I'd be willing to bet. 4 payment is due within 72 hours of auction end. 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. More importantly, it served as a reference antenna for evaluating the loop array. HIGH QUALITY Authentic KB9VBR 2 Meter VHF SLIM JIM amateur ham radio J-Pole base antenna ANTENNA TRIPOD 29FT ALUMINUM PORTABLE TOWER MAST KIT NEW HF End Fed Antenna EFHW-8010-1K 1000W 80-10m / NO TUNER NEEDED!! / 130 feet long. 4 payment is due within 72 hours of auction end. Free shipping. Signal reports indicate the Bobtail is consistently + 2-4 S units compared to the L into Europe and with less QSB. For a dipole antenna of length L oriented along the z-axis and centered at z=0, the current flows in the z-direction with amplitude which closely follows the following function:. N5A - 20 meters was great and then it played out! 40 was very QRN at my QTH but worked 9 more there and was very glad to get them. Constructed with Polystealth-26 and supplied with carabiners for easy deployment and take down. End-fed half wave. 5 to 28 MHz HF bands. To support an antenna, I have no tower, and only two trees that aren't too close to a house. Then the antenna mast I installed as a replacement fell down in a snow storm. Describe your experience with the QSO-King End Fed Antennas by NUØR and tell us why you give it the rating you did (required). I discovered antenna computer modeling as an alternative to the cut-n-try methods. This makes it very convenient to throw the antenna up in a tree and connect the bottom of it to your radio.