HF END FED EFHW-4010P 200W 40-10m / Ham Antenna NO TUNER NEEDED!! / 63 ft long - $158. Last year on Field Day I was able to use an OCF dipole for the first time, and I enjoyed the quick bandswitching it allowed, so I thought I’d try and find a good OCF dipole for use while in the field. Band: 80-10 Meters. One end goes straight into the rig, often with no feedline, and the other end in the air attached to something as high as you can find. They are available in our eBay store. Resonant on 160, 80, 40, 20, 12, 10m 12m resonance was unexpected Z/Θ impedances were 8 to 129 ohms, none near 50 No impedance “curve” - Z went up and down randomly by band Impedance did not match any coax or ladder line No single gamma match or matching stub network could make the impedance match on all bands. 82 MB; The Magical Audio Filter. ó , kdyh kdg \rxu pxowledqg hqg ihg dqwhqqd lqvwdoohg khuh lq 6lqjdsruh iru d ihz zhhnv qrz dqg dp yhu\ sohdvhg , xvhg wkh zluh iurp p\ suhylrxv dqwhqqd zklfk lv ihhw orqj ,w zrunv ehdxwlixoo\ , kdyh lw. MFJ-1984LP, $39. 35 MHz output. The horizontal portion of this ham radio HF antenna should be at least 60% of the overall length, for best performance. You can pick your resonant frequency on each of the 2 elements 160/80. Also it tunes on most other bands but is not as efficient or effective on 20m (for example) as my 20m resonant EFHW with an LC tuned circuit. QRP portable qrp skcc contest portable qrp antenna cw DX SOTA hoa restricted antenna morse code stealth antenna elecraft kx3 ham radio kx3 magnetic loop qrp antenna JT-65 WSPR calling cq digital modes mag loop qrpp reverse beacon network ssb #proudofmyson 10 meter 2 meter portable j-pole CWOpps EI13CLAN JT-9 Wake Island camping copper j-pole. 5 pounds), they are ideal for portable work. Die Antenne ist in einem sehr guten Zustand, alle Verschraubungen wurden durch Edelstahlschrauben ersetzt. No long counterpoise, radials or feedline required Rugged weather-resistant 50-Ohm matching network Fast setup and takedown Easy storage/transport Stainless hardware, UV resistant materials throughout. RigExpert AA -230 ZOOM 0. One end comes with a #10 solder lug making attachment to the matchbox simple and allowing the radiator portion to be replaced if ever necessary. Always keep the non-resonant. 80-10 METER 800 WATT EFHW ANTENNA. I just ordered an EFHW-8010 end fed half wave antenna. 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. With 10 meters disappearing fast, 15 meters will be close behind. 80 with CW on 17 meter. A 160 meter antenna for small lot 160 meter antenna My back fence is 50 ft from the rear of the house and not enough room on the property for 80 meter wire antenna must less a 160 meter one, and this to work great with the sloper wire attached to a fence, I also use monofilament (non-conductive) line like fishing or Weed Eater line as support. Welcome to the Web site of the Radio Station AA5TB. 95 out of stock : mfj1984hp : mfj mfj1984hp: 40-10 meter 800 watt efhw antenna $73. I cut about 35 foot of ladder line and hooked directly to my tuner. You should get a very good match. The heights get less daunting on 40 and 60 meters. I think it would be prudent to add a redirect from the non-existent 75-meter band to the current 80-meter band page, since the two terms are often used interchangeably. All good there. We should use a current balun. 40M MC PP da VS - 40 Metros (kondzilla. It was originally built for my C. Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. Using the guide in the provided instructions, it said I'd need 125 feet of wire for 3. It's direction is NW to SE. 95 special order. The EFHW can be built for multiple bands by installing traps or jumpers. Test Results for the Sloper vs Inverted-V Dipole on 80/40 meters Slopers are generally known to be good low angle DX antennas, while the inverted-V dipole is generally known to respond to higher angle, regional type signals. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. This is a practical maximum for commercial masts, telescoping poles and trees. ULTIMAX HW-END FED (NO ANTENNA TUNER) 10-80 Meters. HF END FED Antenna EFHW-8010-2K 2000W 80-10m / NO TUNER NEEDED!! / 130 feet long - $199. An EFHW antenna puts the feed point where your standing wave gives you high voltage, low current. I am a coffee snob too, but that is another story. Easy Storage/transport. 1 MHz, it is between the 40 and 20 meter bands. Originally, I'd planned to use an inexpensive 10 MHz TCXO, but it was unavailable at the time of construction. MFJ has top selling products like Enterprises Original -557 Deluxe Morse Code Practice Oscillator Straight Key w/Volume Control, RF Power & SWR meter for 1. ADM X SKORP X DILL. Tuned this way, the antenna also radiates fine on 40-6 meters but does poorly on 80 meters unless a more exotic tuning network is used (I haven't bothered). 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. Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. 30 Watts QRP, 80-10 Meters. The 20m EARCHI matchbox is an L-C matching network designed to reduce the high impedance of a 33-34. End-Fed Horizontal Wires(EFHW) cover multiple bands with-out traps, stubs, or resonators. Reluctantly, I had to cut the supplied antenna wire in half due to limited space in my backyard. The derivation was not properly explained. As seen from the table, an 80 meter antenna at half-Wavelength Height should be at 129. A lower value i. Parts Inventory 1 - Tayloe SWR Indicator kit 1 – T94-2 core (red), T50-6 (yellow) not used for 80m 1 – poly-varicon, w/shaft and mounting hardware 72” - magnet wire for the toroid 2 – 6-32 x 5/8” Philips pan head screw. net is a Web site dedicated to ham radio (amateur radio). I will write another post later about my homebrew 80-10 EFHW as it was another fun project. A 80/40/10 Meter Doublet Fed With LadderLine. I think it would be prudent to add a redirect from the non-existent 75-meter band to the current 80-meter band page, since the two terms are often used interchangeably. End Fed Dipole 80-6 meter Portable HF Antenna Matchbox System. My advice is to use a wire that is between 1/2 and 3/4 wavelength on the lowest band (40 meters here). I came across EFHW antennas a while back when I was just starting to figure out antennas. Setting out to explore the world out of EFHW antennas that have dominated the discussions nowadays. HIGH QUALITY ANTENNA TRIPOD 29FT ALUMINUM PORTABLE TOWER MAST KIT NEW Authentic KB9VBR 2 Meter VHF SLIM JIM amateur ham radio J-Pole base antenna HF End Fed Antenna EFHW-8010-1K 1000W 80-10m / NO TUNER NEEDED!! / 130 feet long. 3:1) on 80m. eBay determines trending price through a machine learned model of the product’s sale prices within the last 90 days. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. FULL HF Coverage, no tuner needed on most frequencies. 5:1 on the primary bands and I can use the internal tuning unit in my KX3 to make 30 and 17 meters work. 95 special order. On each half of the antenna, all dipoles halfs are connected together at a common point on each side of the center insulator. by Gene Preston, K5GP I read Rick Littlefield's article in the June 2008 issue of QST on off center fed dipoles and was intrigued by the idea that the antenna could be extended to cover 80 meters. Flightradar24 is a global flight tracking service that provides you with real-time information about thousands of aircraft around the world. After trimming I found that a main element length of about 67 feet gave a good match across the 40 meter band. Never-the-less the antenna will make contacts with just about any way of stringing it up. This item is currently out of stock. First is the EFHW (End Fed Half Wave) antenna. The picture below is a screen capture of dxmaps. 80, 40, and 30 meters? I went out to. Propagation seemed fair on Saturday but was much better on Sunday. Ever since Field Day 2015 and the incorporation of the 88 foot doublet and tuned feeder giving a 50-ohm match for 40/20/17/12 meters I decided to see if I could make an additional doublet for 80 and 40 meters using the same concept, a tuned feeder with a correct length of deployed wire. SWR is 1:1 on the half wave frequencies, and matchable with the KX2 internal tuner on the multiples. 5 Inch Digital Satellite Finder Meter with DC12V Output for CCTV Camera, Find details about China Digital Satellite Finder/ Monitor, HD Satellite Finder from Made in China Full HD 3. Parts Inventory 1 - Tayloe SWR Indicator kit 1 – T94-2 core (red), T50-6 (yellow) not used for 80m 1 – poly-varicon, w/shaft and mounting hardware 72” - magnet wire for the toroid 2 – 6-32 x 5/8” Philips pan head screw. It is actually resonant on 10, 15, 20, 40, and 80 meters. As seen from the table, an 80 meter antenna at half-Wavelength Height should be at 129. "New" refers to a brand-new, unused, unopened, undamaged item, and "Used" refers to an item that has been used previously. Welcome to the Web site of the Radio Station AA5TB. 160 m loop on 80, 80 m loop on 40, 20 m loop on 10, etc. End Fed Half Wave (EFHW) Pros Multi-band – even harmonics (80 -40-20-10) Hi Z feed = < ground loss % Cons Long – use coil to shorten, needs tuner for multi -band Complex matching unit (49:1 to 64:1) Needs feedline choke at coax feed point Matching unit gets “HOT” with power or non - harmonic bands. This doesn't necessarily represent the best deployment in real use. A Broadband 80/160 Meter Dipole An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band. The problem with an end fed half wave antenna is that the antenna. 95 out of stock : mfj1984hp : mfj mfj1984hp: 40-10 meter 800 watt efhw antenna $73. Mark, I have an EFHW that I have ended up trimming to 125'. The Incredible Digiohm. We are proud to sponsor 3Y0Z DX pedition to Bouvet island with our 1500W Band Pass Filters for HF + WARC bands, custom designed matching units for 160 and 80 meters bands Vertical antennas. As anticipated this antenna has a limited 2:1 SWR bandwidth on the 80 meter band (about 90KHz). The ZS6BKW antenna evolved from an optimization of the G5RV antenna that, in general, sacrifices 75m operation to gain 17m and 10m operation. This is less important if you have a resonant half wave or multiple but you don't have that. Ik had de spoel voor 80 meter op 93 uH gemaakt en daar zit nog ruim 2 meter draad achter. still, it is an interesting group to monitor. RF output was shown to be a mere 16W. Ever since Field Day 2015 and the incorporation of the 88 foot doublet and tuned feeder giving a 50-ohm match for 40/20/17/12 meters I decided to see if I could make an additional doublet for 80 and 40 meters using the same concept, a tuned feeder with a correct length of deployed wire. Use as inverted vee or sloper to be more compact. With the supplied matching unit you can use longer resonant wires such as 80 or 160 meters if you have. MFJ-1982MP. 80 meters antennas are a great deal like those for 75 meters but there is a problem in the bandwidth of 80 meters antennas. 60 meters is not included on the list. _____ Martin G8JNJ. 30 Meter Vertical Antenna. I feed it with a 55:1 UNUN. has parallel dipoles for 80 and forty meters fed with 600 ohm twinlead, and a coax lead-in. Doubtful if any effect can be detected on 20, 40 or 80 meters. Use as inverted vee or sloper to be more compact. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. Reluctantly, I had to cut the supplied antenna wire in half due to limited space in my backyard. The matcher box uses a T82-43 Fair-Rite core. Ideal for backpacking and travel. EFHW Sloping EFHW Inverted-V All of these antenna configurations have a feedpoint around 40 feet from ground. 30 Watts QRP, 40-10 Meters. 60 meters is not included on the list. 500pf will put you at around 3700khz. I am using 500pf which puts resonance around 3750 khz. There is a general category of antennas that are "end fed wires". I use a push-up pole or one of the telescoping fishing poles the extend to 15-20 ft. Ten Megahertz (30m) turned out be a useful band for us, allowing CW contact. EndFed 1/2 Wave 300W 80M-10M Wire Antenna EndFed 1/2 Wave 300W 80M-10M Wire Antenna FULL HF Coverage, no tuner needed on most frequencies. I have used many portable antennas. resonator on 80/40/20/10 or EFHW is not a "half wave" on 80 meters. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. resonator on 80/40/20/10 or EFHW is not a "half wave" on 80 meters. 8 Less bandwidth (80-10M) and more lossy than the 4:1 or 9:1 UNUNs --- But it still works fine and does the job. SimpleScout. Gap Titan Vertical; Hustler 2 Meter Vertical about 35 feet above ground at the base. Chris M0VUE. 95 out of stock : mfj1984lp : mfj mfj1984lp: 40-10 meter efhw antenna 30 watts qrp $41. Fortunately, that fact tends to level the playing field for most hams on 80 meters. EFHW Elecraft end-fed EZNEC Field Day Golden Packet hexbeam J-Pole Kenwood kj4faj KX3 kx4o measurement mobile NEC NMO NVIS packet PL259 QRP Simulation SteppIR TNC UHF vertical dipole verticals VHF. Whether you’re QRP backpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. A good example of this would be a standard 40- and 160-meter dual-band dipole (2B4016) and an 80-meter full-size dipole in an inverted vee configuration with the same common feed point. A 160 meter antenna for small lot 160 meter antenna My back fence is 50 ft from the rear of the house and not enough room on the property for 80 meter wire antenna must less a 160 meter one, and this to work great with the sloper wire attached to a fence, I also use monofilament (non-conductive) line like fishing or Weed Eater line as support. As you can see in the photo I used a small T-80-2 powered-iron core with 2 turns of 22 AWG bell wire on the primary and 17 turns of 22 AWG enameled wire on the secondary. 40M Record/Mix & Mastering By : ALIPRODMUSIC Follow ISSEROIS on : FB: INST: YouTube: ADM SKORP DILL. 80 meter transmission kicks on central air system - help (self. WA8YIH operated SSB on 20 meters and up, while WA3WSJ ran CW on 15 meters and up. Buy End Fed Antenna and get the best deals at the lowest prices on eBay! Great Savings Free Delivery / Collection on many items. A 80/40/10 Meter Doublet Fed With LadderLine. G0KYA's HF End Fed Half Wave (EFHW) antenna – construction details Introduction The EFHW monoband matching unit (inspired by AA5TB) allows for a half wavelength of wire to be connected, giving a 50 Ohm impedance match to the transmitter (without a ground plane or ATU) at the frequency of operation. 30 Watts QRP, 80-10 Meters, 132 feet. A so-called random wire antenna is an end fed antenna. China Uhf Antenna manufacturers - Select 2019 high quality Uhf Antenna products in best price from certified Chinese Antenna manufacturers, Tv Antenna suppliers, wholesalers and factory on Made-in-China. Simple Ham Radio Antennas--EFHW-8010 8-band End Fed Half Wave Antenna. Since I didn't want to impact the property, I bought an EFHW 80-10 meter antenna and hung it over a tree in the back yard and tied it off to the porch on the back of the house and to a tree out in the woods. He suggested experimenting with a helically wound vertical. Reluctantly, I had to cut the supplied antenna wire in half due to limited space in my backyard. I'd like to put up a better 80 meter antenna. However, I’m a convert to the EFHW. The KI6J EFHW Tuner kit almost complete with the 5k ohms test load in place. Unfortunately, after many years of use and substantial abuse, the antenna broke on … Continue reading "Repairing the 40/20/10 EFHW antenna". My EFHW 20m antenna is a decent meter element and get all bands i use without a tuner. Reluctantly, I had to cut the supplied antenna wire in half due to limited space in my backyard. Common mode RF chokes are described in detail in another page of this site on the "classic" ham radio dipole. We will also supply custom designed Receive antennas distribution system. Kini ambil kabel sepanjang 6. Ik had de spoel voor 80 meter op 93 uH gemaakt en daar zit nog ruim 2 meter draad achter. End Fed Half Wave Antenna for 6 / 40 Meter 6m to 40m EndFed Half Wave Antenna project produces an inexpensive, multiband, end fed HF antenna matchbox that is quick and easy to setup and use. Antennas 30 meters 10mhz verticale per 30/40 metri. However, I'm a convert to the EFHW. I know its a bad comparison, but testing between my CHA-250B Vertical and this EFHW antenna with an A/B switch - I go from signals that are in the S3 range to S15+. We tuned the half square at the base using this same box. Random Wire Antenna Lengths. Now comes the time to connect the antenna wire/counterpoise. CATATAN : Antenna EFHW dan tuner di atas sudah saya gunakan berkomunikasi dengan mode SSB pada band 40 m, dari Semarang ke Bogor, Bekasi, Malang, Jombang, Gresik. 95 special order. This antenna works on 80-40-20-15 and 10 Meter. HIGH QUALITY ANTENNA TRIPOD 29FT ALUMINUM PORTABLE TOWER MAST KIT NEW Authentic KB9VBR 2 Meter VHF SLIM JIM amateur ham radio J-Pole base antenna HF End Fed Antenna EFHW-8010-1K 1000W 80-10m / NO TUNER NEEDED!! / 130 feet long. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Longer wire is always more efficient but is usually best kept under 300 feet as the characteristics of a Beverage antenna begin to show up beyond this length. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. It consists of an 85ft wire fed against a 17ft counterpoise (attached to the earth point on the ATU). Common mode RF chokes are described in detail in another page of this site on the "classic" ham radio dipole. The page on the "classic dipole" also. The end fed feature adds portable convenience, but does present another issue. With my IC-703 it tuned 80 through 6 all well below 1. End-fed, half-wave (EFHW) antenna. For 20 and 10, I don't notice as much of a dramatic difference. The 30 meter band is pretty interesting. You should get a very good match. I'd like to put up a better 80 meter antenna. I use a push-up pole or one of the telescoping fishing poles the extend to 15-20 ft. EFHW, offers the perfect solution for a wide range of ham activities. The ZS6BKW antenna evolved from an optimization of the G5RV antenna that, in general, sacrifices 75m operation to gain 17m and 10m operation. End-fed radiators have the unique quality of resonating on the 1/2-wave fundamental frequency plus odd/even harmonics above! Broad-band matching transformer at feed point lets the entire HF spectrum be yours! SWR is so low you may never need a tuner. This is a for sale or swap page for Amateur or Ham radio equipment and parts and. I have been looking at maps like this for years, but the other day I saw this one which is especially pronounced in the difference between the northern part of the United States and the southern portion of the country. MFJ-1982MP. Last year on Field Day I was able to use an OCF dipole for the first time, and I enjoyed the quick bandswitching it allowed, so I thought I’d try and find a good OCF dipole for use while in the field. Once it was wound, I tested it on an LC meter, which confirmed it was around 1. END FED antennaEFHW-4010P- 200WPortable or Stationary Multi-Band End Fed Half Wave AntennaThis is a 200W version of popular EFHW-4010 End-Fed Half-Wave (EFHW*) antenna for 40/20/15/ and 10m bands. The winner for portable convenience is the Alexloop Walkham. 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. Stainless Hardware, UV resistant materials throughout. The main category is EFHW End Fed Halfwave Antenna that is about EFHW End Fed Halfwave Antenna. 300pf would move it even higher. 30 Watts QRP, 80-10 Meters, 132 feet. RF output was shown to be a mere 16W. 80-10 meter efhw antenna 30 watts qrp $48. 5 Inch Digital Satellite Finder Meter with DC12V Output for CCTV Camera, Find details about China Digital Satellite Finder/ Monitor, HD Satellite Finder from Made in China Full HD 3. 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. With the tuner in my xiegu x5105 I can also use it on 30, 17, 12 and 6 meters. MyAntennas End -Fed Half-Wave Antenna for 80 -10 Meters. On each half of the antenna, all dipoles halfs are connected together at a common point on each side of the center insulator. 95 out of stock : mfj1984hp : mfj mfj1984hp: 40-10 meter 800 watt efhw antenna $73. 30 Watts QRP, 40-10 Meters, 66 feet. Here's two new projects from the NØLX workbench. Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. MFJ Philippines. The feedpoint impedance of an EFHW isn't the easiest thing to nail down, other than to say it's probably a few thousand ohms. It has a low signal-to-noise ratio ! I mostly trasmit on a dipole array and receive on the loop. All good there. This is most likely due to the larger difference in frequency ratio between the 80 and 40 meter bands vs the 40 and 30 meter bands. 300pf would move it even higher. FULL HF Coverage, no tuner needed on most frequencies. VERTICALS MULTIBAND VERTICALS INTRODUCTION on 20 through 10 meters But for DXing, 80 Meters 40 Meters 20 Meters. De 15 meter kreeg ik nog tunebaar (+/-1:2-3) en de 20 en 40 meter krijg ik wel netjes. I have used many portable antennas. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. END-FED HF Matchbox Antenna. 30 Watts QRP, 40-10 Meters. 5 foot wire (about a half wave on 20 meters) to 50 ohms. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. On Saturday night, I switched my station over to digital to copy the W1AW Field Day Bulletin on 80 meters. Multiband end fed antennas 3. With 10 meters disappearing fast, 15 meters will be close behind. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. The inbuilt SWR meter is very handy and works better than the one in my radio. It's direction is NW to SE. Find great deals on eBay for end fed antenna and end fed hf antenna. So if I assume the popular dipole formula 468/F(Mhz) is correct then on 80 meters and applied also to a quarterwave then I would see resonance at F(Mhz) = (468/66)/2 = 3545Mhz. I am a coffee snob too, but that is another story. OK, call me an antenna snob, but in my opinion the End Fed Half Wave antenna is about as good as it gets for an easy to put up, great performing antenna. I feed the loop with a 1 to 4 balun on 80 meters and in series with the balun, an electrical 1/4 wave of 75 ohm RG-6 coax to match it on 40 meters. Right now my endfed wire is only 10'-15' off the ground. The NB6Zep antenna is a simple inexpensive wire antenna, easy to build, that will yield excellent results on all bands. It will be interesting to check it out in the field as I've found that SWR on an EFHW is dependent on both the surrounding environment and the height of the antenna ends from the ground. 20 meter converter for an RTL-SDR Dongle used in "direct" mode. Most of the construction videos or sites teach how to make the 99:1 xfrmrs from ferrite cores the size of truck tires laced with cable used on Edison's 500KV high tension lines -- presumably so that if VOA needs to erect one, they have a ready watch-n-learn resource. Modification for 75 meters: Here is how to raise the resonant frequency on your myAntennas EFHW-8010 for 75 meter phone operation without affecting the other bands. This all came about because of another project: I'm building a Rock-Mite CW transceiver and needed a 40-meter antenna. Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. Flightradar24 tracks 180,000+ flights, from 1,200+ airlines, flying to or from 4,000+ airports around the world in real time. Whenever something bad is sensed by the Care-O-Meter, they race down to earth in their Cloudmobiles and Rainbow Rollers to help. NK1N operated CW on 20 meters and SSB on 40 meters. by Gene Preston, K5GP I read Rick Littlefield's article in the June 2008 issue of QST on off center fed dipoles and was intrigued by the idea that the antenna could be extended to cover 80 meters. Fastest match i have ever had. The best length is a half wavelength, or even multiples (1/2, 1, 3/2 etc. I will write another post later about my homebrew 80-10 EFHW as it was another fun project. Advanced Search Efhw vertical. 80 meter transmission kicks on central air system - help (self. I wrap the wire where the fishing line goes. This link is listed in our web site directory since Thursday Jul 20 2017, and till today "Shortened EFHW Antenna 80-10m" has been. A special case of this, is the End-Fed Half-Wave (EFHW) antenna. You should get a very good match. 95 out of stock. FULL HF Coverage, no tuner needed on most frequencies. Simply cut the antenna at the half way point and insert a capacitor. ó , kdyh kdg \rxu pxowledqg hqg ihg dqwhqqd lqvwdoohg khuh lq 6lqjdsruh iru d ihz zhhnv qrz dqg dp yhu\ sohdvhg , xvhg wkh zluh iurp p\ suhylrxv dqwhqqd zklfk lv ihhw orqj ,w zrunv ehdxwlixoo\ , kdyh lw. I use a push-up pole or one of the telescoping fishing poles the extend to 15-20 ft. 30 Watts QRP, 80-10 Meters. I had the best results with a straight 33 foot long wire on 40 meters and a similar length of wire center loaded on 80 meters. The installation has the "business" end of the 130 feet antenna wire about 50 feet high sloping down to about 8 feet with some para-cord support from an overhanging tree near mid run to keep the antenna wire high as long as possible. EFHW-8010 Multi-Band End Fed Half Wave Antenna. This factor is one of the most important one for DXers although many are not aware of this. The picture below is a screen capture of dxmaps. It is fun to try them all. EFHW, offers the perfect solution for a wide range of ham activities. Of course, that may be hard to get the best wavelength on one band and not the worst length on another band. This all came about because of another project: I'm building a Rock-Mite CW transceiver and needed a 40-meter antenna. Lightweight (the 20 meter version is only 0. This is Ron WA8YIH’s station running SSB and digital. I will write another post later about my homebrew 80-10 EFHW as it was another fun project. The nice thing about the Z-Match tuner is that it will match just about anything on all HF bands, and only uses two controls. net is a Web site dedicated to ham radio (amateur radio). For 20 and 10, I don't notice as much of a dramatic difference. 500pf will put you at around 3700khz. For 20 meters this would be just under 20 feet. We worked a bunch of 40. The installation has the "business" end of the 130 feet antenna wire about 50 feet high sloping down to about 8 feet with some para-cord support from an overhanging tree near mid run to keep the antenna wire high as long as possible. On 40 meters, the same antenna would have a 1/2λ feeder with a 1λ element. Fantastic antennas!. 95 out of stock : mfj1984hp : mfj mfj1984hp: 40-10 meter 800 watt efhw antenna $73. These leads are part of the antenna and in some applications, can make antenna resonance drop in frequency by a small amount. Mark, I have an EFHW that I have ended up trimming to 125'. Of course, that may be hard to get the best wavelength on one band and not the worst length on another band. This is a basic balun for a wire antenna, and it worked great for the flagpole! Amidon 200. If they are not installed, increase the pipe. 1-230 MHz Antenna and Cable Analyzer. Originally, I'd planned to use an inexpensive 10 MHz TCXO, but it was unavailable at the time of construction. Test Results for the Sloper vs Inverted-V Dipole on 80/40 meters Slopers are generally known to be good low angle DX antennas, while the inverted-V dipole is generally known to respond to higher angle, regional type signals. As its name suggests it is a half wave long and is normally only usable on a single band. RF output was shown to be a mere 16W. The horizontal portion of this ham radio HF antenna should be at least 60% of the overall length, for best performance. The 160/80/40 meter multiband fan dipole (lower right) mounted on the tower! CONSTRUCTION DETAILS: In the photo above, the 160 meter section is on top, 80 meters in middle and 40 on bottom. 82 MB; The Magical Audio Filter. You will also learn how conditions change with seasons and weather. I have used many portable antennas. However, an EFHW will work on harmonics, though the pattern changes. Read honest and unbiased product reviews from our users. EFHW-8010 8-band End Fed Half Wave antenna product reviews by real people like you. I'd like to put up a better 80 meter antenna. However, I'm a convert to the EFHW. a few friends and I have done a few experiments with the EFHW-8010, using about 50-80W output power on 80/40/20 – in one case we had an RF problem at the transceiver end but in most cases there was no problem. I also wanted to get a decent antenna for 30 Meters, and I like vertical dipoles because one does not need the huge radial field a monopole does. Optimal Length of Random Wire Antenna J. Chris recalls a team event last year where they needed to get on 40m fast so a fishing pole and about 10 meters of wire were produced along with 2 elevated radials. I saw photos that Steve WG0AT had posted on Facebook of his little EFHW, with the matching unit built into a dental floss container, for a light and compact solution. It consists of an 85ft wire fed against a 17ft counterpoise (attached to the earth point on the ATU). Whether you’re QRP backpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. My EFHW 20m antenna is a decent performer, so I'm thinking that an 80m version could be an option. If installed, drill a 1/8 inch hole in the bottom caps for moisture drainage. Power rating is a conservative 100 watts. Common Mode RF Chokes For The Ham Radio HF Antenna. De aanleiding was het berichtje van PA1RIK op zendamateur. Ik had de spoel voor 80 meter op 93 uH gemaakt en daar zit nog ruim 2 meter draad achter. Welcome to the Web site of the Radio Station AA5TB. I designed Sky Hook-I for 40 through 15 meters. 95 1 in stock : mfj1982mp : mfj mfj1982mp: 80-10 meter 300 watt restricted space efhw antenna $63. Always keep the non-resonant. Most of the construction videos or sites teach how to make the 99:1 xfrmrs from ferrite cores the size of truck tires laced with cable used on Edison's 500KV high tension lines -- presumably so that if VOA needs to erect one, they have a ready watch-n-learn resource. Never-the-less the antenna will make contacts with just about any way of stringing it up. It is a heavy duty QRP/Low Power antenna that uses #14 wire instead of the usual #16 wire used by our other QRP/Low power models. HF Communications is at the lowest of the solar cyle. March 2016. There is a general category of antennas that are "end fed wires". An antenna lower than 0. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. On each half of the antenna, all dipoles halfs are connected together at a common point on each side of the center insulator. A good example of this would be a standard 40- and 160-meter dual-band dipole (2B4016) and an 80-meter full-size dipole in an inverted vee configuration with the same common feed point. Parts Inventory 1 - Tayloe SWR Indicator kit 1 – T94-2 core (red), T50-6 (yellow) not used for 80m 1 – poly-varicon, w/shaft and mounting hardware 72” - magnet wire for the toroid 2 – 6-32 x 5/8” Philips pan head screw. In 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.