Here is a new VI Wire Antennas balun. On Tuesday 8th August, there was a planned contact between the ISS and YOTA at 1837 UTC, so I decided to have a listen. Designed for DX peditions. 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. The resource is currently listed in dxzone. It is an order of magnitude of difference. Great job, Steve. I know because I use one with my motorhome because it is easy to deploy. MFJ-1984LP, $39. 55MHz (the middle of the CW part of that band). The 3 elements Delta Loop has a boomlenght of 5,4 meters. It will vary somewhat with wire. In fact, it has been a major part of my life because it has effected it in so many ways. If you use an SWR meter or an analyzer at the base of the antenna you will get the most accurate readings in a timely fashion. 1 MHz, output dropped all the way to 1. As anticipated this antenna has a limited 2:1 SWR bandwidth on the 80 meter band (about 90KHz). EFHW End Fed Half Wave Antenna Higher Power Using 52 Mix Ferrite After months of research I found a way to make the transformer handle high power. Great job, Steve. This is an End Fed multi-band, wire antenna that will cover all bands from 80 to 6 meters, including the WARC Bands, as well as 60m meters and MARS frequencies. This is impossible for most amateur radio operators, therefore the modeling data that follows is based on a 12. ARRL Product Review of the M2 6-Meter HO Loop Antennas. 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. 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. Full HF coverage, no tuner needed on most frequencies. Tuning the COM-20VA 20 Meter Vertical Antenna is straightforward and intuitive. Here are plots of G5RV feed line SWR: The G5RV has a reasonable SWR on 80, 40, 20, 15, and 12 meters. 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. * Impedance - 50-75 ohms Freq. Hard to beat prices for 200 80. The all black construction makes them difficult to see. End Fed Half Wave (6. In fact, the EFHW will probably become the "plan A", and I'll let the Big Ear antenna be the plan B. Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. Size: 80 x 50 x 22 mm. In the remaining bands (160,80 and 40 meters) the match was very difficult,and I was never able to get some acceptable readings of R and X. End Fed Dipole 80-6 meter Portable HF Antenna Matchbox System. Let's let Dom fill us in on his results: "The set-up appears to be working great on 80-10 meters (didn't try WARC bands yet) with a 1:1 SWR everywhere. 5:1 VSWR bandwidth. I have one outdoor antenna, a 43-foot vertical; the rest of my antennas are in my attic. Here is a sure fire way to make end fed half wave antennas fed with a 50 ohm coupler work - without long radials, elaborate grounds, chokes, voodoo, etc. It also works pretty well on 80 and even 160 meters but at only 27. Try using a 40 meter 1/4 wave dipole on 80 meters. Ke luar Jawa belum sempat dicoba. For the antenna layout below, the center capacitor is 15 pF at element 3 between elements 2 and 4 and a 4:1 balun feeds the antenna between elements 1 and 2. On 80 meters, most of the wire is a fraction of a half-Wavelength Elevation high. Describe your experience with the EFHW-8010 8-band End Fed Half Wave antenna and tell us why you give it the rating you did (required). 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. 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. With the tuner in my xiegu x5105 I can also use it on 30, 17, 12 and 6 meters. (I wish Lloyd would use that same antenna when he's the fox. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. Never-the-less the antenna will make contacts with just about any way of stringing it up. An antenna lower than 0. Heard you KN2G, and tried a couple times to answer your CQ on 80, but you did not hear me. The 10-80 meter groundplane vertical antenna is a rugged multiband vertical antenna, That is 43 feet in height. Portrayed below is a complete and self-contained NEC model of one popular form of the end-fed half-wave dipole antenna. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. I am going to leave the antenna up a few days and make a few contacts. The larger the wire, the wider the bandwidth. I do need to make a correction in calling the EFHW a non resonant antenna. 80-10 meter efhw antenna 30 watts qrp $52. As a test I took out the UNUN and fed it direct since the 130' EFHW is a 1/4 wave on 160. 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. 37 Wind Rating - 85 Pattern - Omni * Bandwidth is within 2:1 SWR. Flag Pole Verticals •15. An antenna lower than 0. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. The SE HF X-80 is an end fed aluminium vertical antenna, capable of allowing the user to work 80 metres through 6 metres bands using an ATU, also not requiring any counterpoise and can be fed using coax cable. HORIZONTAL LOOP ANTENNA CONSTRUCTION. I now have an 80 meter end-fed half wave antenna that I will be using. EI've had a PAR End Fedz antenna since I had my K2 (it came with one direct from Dale Parfit himself) and used it extensively for portable use for a long time. The main category is EFHW End Fed Halfwave Antenna that is about EFHW End Fed Halfwave Antenna. One such antenna is the W3EDP end fed. The second from the left is 60m can can be ignored. Especially for chewing the rag with locals where an NVIS antenna would be much more. 43 KB; Low Noise Amplifiers for 2304 3456 5760 and 10368 MHz. An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters John DeGood, NU3E [email protected] March 2016. Click Here for free End Fed 6 - 40 Meter Matchbox Antenna assembly instructions (tuner required). " We couldn't be more pleased with the results. 30 Watts QRP, 40-10 Meters, 66 feet. I may need to hit up a friend for a smaller piece of coax, though. The heights get less daunting on 40 and 60 meters. An antenna lower than 0. It will vary somewhat with wire. On the harmonics, the antenna is a multiple of a half wave and has the same impedance at the end. As I look forward to cooler weather I've starting to think about 80 meters. Dedicated to supporting Amateur Radio Portable Operators. Waters & Stanton are suppliers of amateur and professional radio equipment, GPS, marine, aeronautical and short range handhelds as well as Europe's largest ham radio demonstration center. Whether you're QRP backpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. 95 1 in stock : mfj1982mp : mfj mfj1982mp: 80-10 meter 300 watt restricted space efhw antenna $67. I checked this against the good old "468/f" formula and got a longer (~131ft) number. If you use an SWR meter or an analyzer at the base of the antenna you will get the most accurate readings in a timely fashion. October 2011 My 6 - 40 meter end fed arrived through the UK holiday mail and I departed from my norm of a sloper and. 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. With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun is one possible solution. 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. Today we do the same thing but there are many smaller suppliers. This review of NI4L’s 7 band OCF dipole was prompted by my needing a quick deploy multiband antenna for both field day, and for RVing. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. Some photos from the latest ZK3A operation of 8 direction 4 Square system on 80 meters:. My advice is to use a wire that is between 1/2 and 3/4 wavelength on the lowest band (40 meters here). 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. These are excellent antennas. wavelengths, and on 80 meters (let alone 160!) that's still pretty high in the air. It is a resonant Half wave on 80m (3. Here is the remote control version using relays. My Favorite 40m "DX" Antenna NOTE: This is not a plug-n-play antenna. Great job, Steve. Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. Hf End Fed Antenna Efhw-7510-2k 2000w 75-10m No Tuner Needed 132 Feet Long. HORIZONTAL LOOP ANTENNA CONSTRUCTION. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. Thanks for that!. The SWR is less than 1. QRPGuys Portable 80/60m Vertical Antenna – $20 Expanding on our experience of using the readily available $10 eBay telescoping 17′ fiberglass fishing poles for a vertical support in the Tri-band Vertical Antenna, we are offering a portable 80/60m, center loaded, 15′ long vertical antenna. Obviously, an EFHW antenna has a "half-wave" length only at one specific frequency: there is absolutely no such thing as a "multi-band end-fed half-wave" antenna. Next I installed a low-pass filter suitable for 40 and 30 meters and checked again. Please note the shipping policies and notifications on our home page. Googling around, I found a commercial design for $75 and a homebrew design that I could make for a lot less. Unfortunately, after many years of use and substantial abuse, the antenna broke on … Continue reading "Repairing the 40/20/10 EFHW antenna". March 2016. Always keep the non-resonant. The center is high in the air with both ends or legs of the Dipole heading towards the ground on a 45 degree from center. 40 meter hamsticks can be finicky, you might be able to squeeze in the whole phone sub band within the 2. Thanks for that!. My EFHW 20m antenna is a decent performer, so I'm thinking that an 80m version could be an option. Our service is currently available online and for your iOS or Android device. I have one outdoor antenna, a 43-foot vertical; the rest of my antennas are in my attic. Any receive antenna can be matched by those smal boxes. This item is currently out of stock. The problem with an end fed half wave antenna is that the 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. QRPGuys Mini No Tune End Fed Half Wave Antenna is designed as a mini highly portable 80m-10m end fed half wave wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator. MFJ-1984LP, $39. What I discovered is that it provides a good SWR without a tuner on 40, 20, 15 and 10 meters. In fact, it has been a major part of my life because it has effected it in so many ways. Amateur Radio (G3TXQ) - Coaxial Antennas. There was an issue with the ISS VHF downlink during this pass, so the contact was rescheduled to the next pass, at 2015 UTC. ) Got to log several new calls this sprint. We should use a current balun. If you want it to work properly, you will need a means of measuring SWR, some trial and error, a little patience and at least half-a-brain to build this. How-To: Make a Multiband EFHWA for Amateur Ham Radio dianaeng Fashion + Technology Diana was a contestant on Project Runway season 2, graduated from RISD, and currently lives in New York City. The SWR is less than 1. about 26 feet vertical and 42 feet horizontal. 5:1 VSWR bandwidth. EFHW-8010 8-band End Fed Half Wave antenna product reviews by real people like you. Ideal for backpacking and travel. Mention to anyone you are using an EFHW will prompt a discussion about the pros and cons of the EFHW versus the center fed 1/2 wave dipole. Although this design has been around for a long time, it is only gaining popularity now due to the recent improvement in high power antenna tuners. The myantennas. Like almost all such 'designs', they are published without supporting measurements or simulations. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Never-the-less the antenna will make contacts with just about any way of stringing it up. k hams with my Xiegu x5105 5 watt rig on 80 meters with the Efhw-8010. 40 meters started out good but soon went dead for me. Of course, that may be hard to get the best wavelength on one band and not the worst length on another band. The EFHW design is actually a very old design that takes advantage of the harmonic relationship between the 160,80,40,20, and 10 meter bands. So questions follows:. It also works pretty well on 80 and even 160 meters but at only 27. QRPGuys Mini No Tune End Fed Half Wave Antenna is designed as a mini highly portable 80m-10m end fed half wave wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator. The wire was very low over ground, just 2 meter. It's direction is NW to SE. An end fed half wave antenna is one of a specific length depending on the frequency that it is to be used on, for example, an end fed half wave antenna for 80 meters is about 130′ long. If this is your first visit, be sure to check out the FAQ by clicking the link above. EndFed 1/2 Wave 800W 40M-10M Wire Antenna EndFed 1/2 Wave 800W 40M-10M Wire Antenna ULL HF Coverage, no tuner needed on most frequencies. 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 is impossible for most amateur radio operators, therefore the modeling data that follows is based on a 40 foot feedpoint elevation (12. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Introducing the FreeStyle Optium Neo System, with a choice of support tools especially designed for people on insulin. I came across EFHW antennas a while back when I was just starting to figure out antennas. 1982MP End Fed, 1/2 Wave, 80-10M, 300W, Wire Antenna. The elevation at 40 feet is a small fraction of an optimal 130 foot half-Wavelength Height so the signal is mostly reflected upward in an oblong shape. 25 meter band T1B08 [97. 102 feet long, shorter than 80 Meter dipole. UPDATE : Saya merubah counterpoise diperpendek menjadi hanya sepanjang 2 meter, tetap bisa dituning secara sempurna menjadi 50 ohm tanpa kesulitan. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. I am a coffee snob too, but that is another story. 2MHz, ground mounted) SWR – Actual bandwidth on the 50Ω side of the coupler will be much narrower, due to the tuned circuit we are using. Lightweight (the 20 meter version is only 0. MARTIN - G8JNJ - Broadband HF Vertical - Martin - G8JNJ - ECLECTIC AETHER - Radio Related Ramblings. Resources listed under EFHW Antenna category belongs to End-Fed main collection, and get reviewed and rated by amateur radio operators. We found communication with some of the other participants to be difficult. The Horizontal Loop, also known as the Loop Skywire Antenna, is an old but very effective design. 15 meter band B. A Top Loaded Vertical on 80/160 • Split the difference and load a Tee or inverted L on both 80 and 160 (w/tuner) - 90-100 ft is 3/8λon 80M, 3/16 λon 160M - 160-170 ft is 5/8 on 80M, 5/16 on 160M Radial Systems • Provide a return for the fields and currents produced by an end-fed antenna • The earth is lossy, burns transmitter power. This package will give you the same band coverage as a full-size 40-meter dipole, a full-size 80-meter dipole, and a shortened 160-meter dipole. As typically installed, it is a compromise antenna but great for portable use because it is easy to pack and easy to install. It will vary somewhat with wire. This is a great life long hobby. 80 meter hamsticks are a fools errand, at a calculated 0. I've made some progress on the EFHW antenna since my last post here on AmateurRadio. 42 Antennas, 80 Meter Yagi, How To Build A Relatively Small 2-Element, CQ 1998, Jun. com efhw-8010 is a great antenna , just look at the reviews on the site , I doubt they are fools who don't know what they're talking about. 3:1) on 80m. >From a Maine inland vacation spot a few years ago this antenna got me a new >country on Top Band one August (FW), and from the Adirondacks one year it >worked for a new one on 6 meters (VP2E). I have two EFHW’s (commercial units from myantennas. QRPGuys Mini No Tune End Fed Half Wave Antenna is designed as a mini highly portable 80m-10m end fed half wave wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator. This works well for NVIS communications with nearby. I may need to hit up a friend for a smaller piece of coax, though. The larger the wire, the wider the bandwidth. 10 meter band C. It is 10db over my 160 meter 1/2 wave to everywhere I work. I feed it with a 55:1 UNUN. 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. I am a coffee snob too, but that is another story. EFHW 8010 75 meter Modification Here's how to raise the frequency on 80 meters without effecting the other bands. The Villages Amateur Radio Club members enjoy building kits and homebrew receivers and transmitters. 8 MHz called for a coil diameter of 30 in. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. They are OK on 60-15 meters, but not especially good anywhere. Reviewed by Bob Allison, WB1GCMAssistant Laboratory [email protected] others will offer thousands of ohms. Super wide bandwidth means more time operating ,and less time stuck on a frequency your trap vertical is tuned for. Great job, Steve. EFHW-8010 8-band End Fed Half Wave antenna product reviews by real people like you. At 132 feet it is resonant on 80 meters, at 136 feet it is resonant on 40 meters on the second harmonic, at 138 feet it is resonant on 20 meters on the third harmonic. DX Engineering sells Hustler verticals that are OK on 80 (but narrow banded) and great from 40 meters up. The antenna can be pole mounted at ground level or elevated depending on the user's personal requirements. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. In fact, it has been a major part of my life because it has effected it in so many ways. So, sea all around. 8 MHz called for a coil diameter of 30 in. 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. First is the EFHW (End Fed Half Wave) antenna. EFHW-8010 8-band End Fed Half Wave antenna product reviews by real people like you. Only at eHam. This is impossible for most amateur radio operators, therefore the modeling data that follows is based on a 12. What I discovered is that it provides a good SWR without a tuner on 40, 20, 15 and 10 meters. The EFHW can be built for multiple bands by installing traps or jumpers. 5 foot wire (about a half wave on 20 meters) to 50 ohms. Connect the HF transmitter to the SO239 antenna connector with a SWR meter in line. This is an End-Fed Half-Wave (EFHW ) antenna for 80/40/30/20/17/15/12 and 10m bands. Upgrade Or Repair Air Intake Systems and Fuel Delivery Components. The EFHW-8010 End Fed antenna was recommended so we gave it a go. The next generation in Design and manufacturing. 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. Celebrating Over 60 Years of Ham Fellowship in Chicago South Region "We take 160 meters seriously" Our daily 160 meter rendezvous on 1935 kHz, 10:30 am Weekly brunch gathering. HORIZONTAL LOOP ANTENNA CONSTRUCTION. I did some modeling with EZNEC. I worked W3KC and K3ESE on 40 and got them again on 80. We sell all types of HF Wire Antennas for ham radio, If you are looking for quality HF Base station antennas at a great price then look no further, We stock HF Wire Antennas, And More, From all the top antenna manufacturers, Includes Cushcraft antennas,Diamond antennas,Radioworks antennas,Comet antennas,Watson Antennas and more. This is impossible for most amateur radio operators, therefore the modeling data that follows is based on a 40 foot feedpoint elevation (12. The novel thing was that I only built it the day before and it uses a Coghlan camping washing line spool with the string taken off and about 21m of wire wound onto it. 30 Watts QRP, 40-10 Meters. We should use a current balun. We found communication with some of the other participants to be difficult. >From a Maine inland vacation spot a few years ago this antenna got me a new >country on Top Band one August (FW), and from the Adirondacks one year it >worked for a new one on 6 meters (VP2E). 95 1 in stock : mfj1982mp : mfj mfj1982mp: 80-10 meter 300 watt restricted space efhw antenna $67. I didn't intend it that way, it just happened. I can now run 500 watts + on 80 meters using CW. I have ordered a new antenna, an 80-10 meter end-fed long wire that I will install as soon as it arrives. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Mfj-904h Travel Antenna Tuner 10-80m 150w Meter Balun Worldwide Delivery Mfj904h. After trimming I found that a main element length of about 67 feet gave a good match across the 40 meter band. 43 KB; Low Noise Amplifiers for 2304 3456 5760 and 10368 MHz. Can someone describe what kind of performance I might expect from a MyAntennas EFHW 80-10m antenna, installed outside about 30' above the ground? I am interested in purchasing one because my attic antenna doesn't work with a darn. Did it work? - Duration: 6 minutes, 32 seconds. To make this physically shorter, while keeping it electrically a 1/4 wave length, we add inductance to the wire. Since then, I built (and blogged about) a AA5TB style EFHW matcher that uses a fixed coil and a variable capacitor on the high impedance. These values assume that the antenna tuner is placed at the feed point of the antenna and that a suitable ground is provided. 1 MHz, output dropped all the way to 1. If this is your first visit, be sure to check out the FAQ by clicking the link above. 800 Watt FD4 multi-band antenna with 1:4 super balun Project for a multi-band antenna for the 80, 40, 20, 17, 12, 10 and 6 meter bands, including a 1:4 impedance transformer and a current balun handling 800 Watt with common mode attenuation up to 40 dB!. 2 meter elevation (40 feet). It's direction is NW to SE. I've made some progress on the EFHW antenna since my last post here on AmateurRadio. A Top Loaded Vertical on 80/160 • Split the difference and load a Tee or inverted L on both 80 and 160 (w/tuner) - 90-100 ft is 3/8λon 80M, 3/16 λon 160M - 160-170 ft is 5/8 on 80M, 5/16 on 160M Radial Systems • Provide a return for the fields and currents produced by an end-fed antenna • The earth is lossy, burns transmitter power. 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. The center is high in the air with both ends or legs of the Dipole heading towards the ground on a 45 degree from center. A half-wavelength radiator has a high impedance (high voltage, low current) at the feedpoint. Діяльність - на 80-10 метрах із використанням cw, ssb та різних цифрових режимів. All components. Mention to anyone you are using an EFHW will prompt a discussion about the pros and cons of the EFHW versus the center fed 1/2 wave dipole. Introducing the FreeStyle Optium Neo System, with a choice of support tools especially designed for people on insulin. The finished tuner is just 2"x 2 1/4"x 7/8", and the weight is 2. Antenna gain is measured in either dBi or dBd. I support the feedpoint on a push-up painters pole on the rear of an RV trailer and drape the wire over a nearby tree branch. One such antenna is the W3EDP end fed. So, sea all around. This link is listed in our web site directory since Thursday Jul 20 2017, and till today "Shortened EFHW Antenna 80-10m" has been. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. It is a resonant Half wave on 80m (3. It requires a small matching network in most cases. End Fed Dipole 80-6 meter Portable HF Antenna Matchbox System. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Googling around, I found a commercial design for $75 and a homebrew design that I could make for a lot less. 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. Unbelievable prices on Radar Hf 1484 Olds!Presenting a comprehensive assortment of Radar Hf 1484 Olds for sale right now. com EFHW has a 49 to 1 Unun in the box. Can someone describe what kind of performance I might expect from a MyAntennas EFHW 80-10m antenna, installed outside about 30' above the ground? I am interested in purchasing one because my attic antenna doesn't work with a darn. As seen from the table, an 80 meter antenna at half-Wavelength Height should be at 129. 1 MHz, output dropped all the way to 1. Today we do the same thing but there are many smaller suppliers. This is a practical maximum for commercial masts, telescoping poles and trees. I call this very simple transmitter the "Easy Ten" because it can be easily heard at. If you want it to work properly, you will need a means of measuring SWR, some trial and error, a little patience and at least half-a-brain to build this. With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun is one possible solution. k hams with my Xiegu x5105 5 watt rig on 80 meters with the Efhw-8010. 30 Watts QRP, 80-10 Meters, 132 feet. The 20m EARCHI matchbox is an L-C matching network designed to reduce the high impedance of a 33-34. 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. It also works pretty well on 80 and even 160 meters but at only 27. I really should make the one for the KX2. Here is a sure fire way to make end fed half wave antennas fed with a 50 ohm coupler work - without long radials, elaborate grounds, chokes, voodoo, etc. Use on 160 Meters as Marconi with tuner and ground. I designed Sky Hook-I for 40 through 15 meters. (3/2 λ) doublet with 31 (1/4 λ). Ke luar Jawa belum sempat dicoba. This is impossible for most amateur radio operators, therefore the modeling data that follows is based on a 12. An inverted vee with a 40-foot (12 m) apex elevation requires only 115 feet (35 m). Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. Hf End Fed Dipole Efhw-8010 200w 80-10m No Tuner Needed 130 Ft Long. 30 Watts QRP, 80-10 Meters. This is a practical maximum for commercial masts, telescoping poles and trees. I had been interested in a one-wavelength 80-meter horizontal loop. MyAntennas End -Fed Half-Wave Antenna for 80 -10 Meters. 15 meter band B. This operation calls for a fair degree of manual dexterity - it is easy to damage the meter movement if you are careless. 95 1 in stock : mfj1982mp : mfj mfj1982mp: 80-10 meter 300 watt restricted space efhw antenna $67. example, a 28-31 foot wire will typically allow 40 thru 10 meter coverage and a 43-50 foot wire will provide access to 80 thru 10 meters. This item is currently out of stock. Simple Ham Radio Antennas--EFHW-8010 8-band End Fed Half Wave Antenna. If you have no particular preference within a given ham radio band, then simply enter its center frequency (i. No contacts @ 1 watt. 30 Watts QRP, 80-10 Meters, 132 feet. They, like me are people who actually own one ! Thanks Mark EI3IBB. A 1:1 balun was the best overall choice for feeding the horizontal loop Years ago I bought a Heathkit SA-2060 (non "A" version) 2kW-rated antenna tuner at a local swap meet for a good price. This is a great life long hobby. With the tuner in my xiegu x5105 I can also use it on 30, 17, 12 and 6 meters. It is a resonant Half wave on 80m (3. A ferrit szintén T200-6 gyűrű, de immáron 34 menettel. Portrayed below is a complete and self-contained NEC model of one popular form of the end-fed half-wave dipole antenna. Paolo is located on a little island in Italy He is situated only 20 meters from the sea on the East front. 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. Add 65 feet of wire for 40-10 meter operation or 130 feet for 80-10 meters. Welcome to the Web site of the Radio Station AA5TB. End-Fed Horizontal Wires(EFHW) cover multiple bands with-out traps, stubs, or resonators. They, like me are people who actually own one ! Thanks Mark EI3IBB. This operation calls for a fair degree of manual dexterity - it is easy to damage the meter movement if you are careless. Today we do the same thing but there are many smaller suppliers. MyAntennas End -Fed Half-Wave Antenna for 80 -10 Meters. Applying a feed to any antenna in NEC or any electromagnetic simulation software is about a simple a task as can be conceived by placing a "source" of near infinitesimal size inline with a dipole element. All components. Inverted L vs. October 2011 My 6 - 40 meter end fed arrived through the UK holiday mail and I departed from my norm of a sloper and. 95 1 in stock : mfj1982mp : mfj mfj1982mp: 80-10 meter 300 watt restricted space efhw antenna $67. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. Never-the-less the antenna will make contacts with just about any way of stringing it up. I came across EFHW antennas a while back when I was just starting to figure out antennas. This vertical antenna has no lossy traps or coils to burn out. Fantastic antennas!. The below pictures are of the temporary station. Always keep the non-resonant. With the winter months 80 becomes quieter and a better band for "DX". Even though I’m in the middle of figuring out the build of a shortened end-fed half-wave antenna, an improvement on my current EFHW setup, I’d had my eyes on various vertical antenna solutions for a while, even though they’re not as efficient as a full-size antenna.