Balun For Carolina Windom Antenna

I removed a Carolina Windom 80 which is the best wire antenna that I have ever used and replaced it with the Carolina Windom 160. The Line Isolator is a form of Choke. Antenna Windom FD-3 The antenna operates in three HF bands 40m, 20m, 10m, without matching device. The result is an inverted-vertical antenna located high in the air and free of ground losses. For their 80m antenna, they used a 22-foot section of coax below the feed point balun and inserted a 1:1 choke at that point. The off centre fed dipole (OCFD) or windom is fed via a 4:1 current balun approximately 1/3 from the end resulting in a multi band antenna that has been popular for decades. There are antenna installation hints and grounding information. Installation instruction addendum for all newer antennas are also listed in this link. My OCF HF Antenna Balun(01) Inverted-V BuxComm 802134 Off-Centre-Fed Windom 80M thru 2M antenna on 6foot horizontal boom out from 40foot tower @31feet AGL (Above Ground Level) for 2way radio station VE9MHZ / VE3XID. Carolina Windom New Carolina Windom The Windom Handbook Six-Band HF Center Loaded Off Center Fed Dipole WC7I The truth about SWR *** This is a very good site with clear explanations The Truth About the G5RV Antenna Antenna Theory The page is not strictly related to amateur radio antennas but the theory is universal. The differences between this antenna and Windom’s is that the Original Windom is not a dipole. K1POO 4 Band Off Centre Fed Dipole (40-20-15-10m ) MMANA-GAL K1POO Antenna model's 3D far field results The antenna at 8m height above real ground 5mS/m and dielectric 13, SWR ref 200Ω. For more unusual antennas, visit my web page. Windom Antennas Amateur Wire Antennas : The classic Windom antenna is an off-center-feed dipole that, by design, operates on its frequency of resonance and harmonically related frequencies. The question is whether it is its popularity that is the reason for cries for help, or whether there is something inherently high risk in the ‘design’. To be used with a Off Centre Fed Dipole antenna. Antenna wire of PVC coated steel wire. All these names are for the same item: a common mode current suppression device that works to suppress common mode current on the outside braid of your antenna feed line. In my design I used only 1, since the output of my rig is about 100W. Since our return home for the U S Marines (mid-fifties) we have built more true Windoms than all the other antenna builders combined. Homemade 'Carolina Windom' antenna. com in a single category. So far this is a very quiet antenna and I'm receiving better reports than the carolina windom I had previously. Hams Ham Radio Ants Bricolage Ham. Enter the New Carolina Windom. This means that in most cases a 4/1 balun is more suitable than a 6/1 version. Purists would not call this a Windom antenna anymore because of the absence of the single-wire feedline. Antenna Windom FD-3 The antenna operates in three HF bands 40m, 20m, 10m, without matching device. 2kg Wire Material Flexible, Zinc coated steel wire. Delta Fed Dipole Antenna 13. For a year all has been well with the Term_2_usb application until this morning. A feed line is attached to an optimum point along the dipole by a BALUN. NEW Carolina Windom shown cut for 40, 20, 15 and 10 meters. Radio Wavz 40m DX(OCF)Windom 66ft. exhibited some 2. Basically, this is a coil in the coax feeding the antenna as close to the feed point as possible. Transformers / Baluns Resistor Products Inductor Products Capacitors SDI Products SDI Cable Drivers SDI Cable Equalizers SDI Reclockers Frequency Generation Voltage Controlled Oscillators NLTL GaAs Comb Generators Multifunction ICs & Modules Core Chips Switch LNAs. This antenna is in use the world over by DX'ers and DX'peditions. carolina windom i have used a version of this antenna for several years and i am very impressed with it. It is encased in 3 inch pvc round tubing. homebrew 4 to 1 balun untuk windom antenna Ini adalah 4-1 balun yang diperbuat daripada speaker wire,nampak mudah kerja-kerja driling agak sukar kerana ketepatan lubang adalah penting,bahan lain adalah cable lug,pvc pipe 11/4". NVIS Antenna Information. The large offset means the balun must be particularly good current balun on the lowest frequency bands, and the terminal best able to stand the highest voltage to earth should be on the shortest antenna side. (General Windom question) Is the wire of the Windom (if attached in a taut manner, using rope attached to insulators at the end of the wires sufficient to support the balun with feed line attached? Or should I consider a "balun mounting" solution and drill into my nice, new roof to help support it. Windom uses a 4:1 voltage balun, which matches the antenna's leg voltages and then uses a separate 1:1 choke balun to isolate the feed line from the vertical radiator. 1:4 Ratio Balun 1-56MHz 150W HF Windom Amateur Radio Dipole Shortwave Antennas | Mobile Phones & Communication, Radio Communication Equipment, Parts & Accessories | eBay!. This is not really a Windom at all, but an Off Centre Fed dipole with a radiating feed line. Here is an enhanced balun for OCF dipole. Carolina Windom 80m long. A suitable antenna tuner will permit operation on all bands SO through 10. For multi-band operation a choke balun is most appropriate with a 1:1 impedance ratio. Here is a way to obtain all-HF band no-tuner operation while running a balanced antenna. Windom uses a 4:1 voltage balun, which matches the antenna's leg voltages and then uses a separate 1:1 choke balun to isolate the feed line from the vertical radiator. Installation instruction addendum for all newer antennas are also listed in this link. 6 out of 5 stars 2. The Windom antenna (fig. 29 from Ham Radio. Getting back on the air researched several wires which would fit my garden, tried a home-brew Carolina Windom and hey presto its a gem on all bands but Top Band. EMF-P Wire Antenna 0. It needed to be effective and multiband. Input choke balun, to filter common mode currents. 9 feet) Cut this length of wire at a point 37. So for now I'll put a foto of balun 4:1 on ferrite rod. With a 6:1 Balun transformer is possible to feed easily by using a coaxial cable of 50 Ohms (300/6=50), like BROAD-PRO 50 (www. My QTH consists of a Pixel amplified mag loop antenna for HF receiving. A lot of research concerning the modern variations of the Windom antennas has been done, including the ones described by Fritzel, K4ABT, W4RNL, The Carolina Windom, and ON4BAA. The Carolina Windom is very popular with modern hams, and at the same time is commonly the discussion of problems in online fora. This is the same design as the ‘Carolina Windom 80 Special’ You can buy one of these for £109. Both of these baluns are readily available and relatively inexpensive. I built an 80m OCF/Off Center Fed antenna and have found it to be one of the best mufti-band antennas you can use. It's a compact antenna, (dipole was around 112′, this Windom is 66′) and promises to not need to be tuned across the primary HF frequencies from 7-30Mhz. that on 15m, the antenna performs like a normal dipole with no feeder radiation when the 1:1 Balun in switched in. The only issue I had was what to do with the super long ladder vertical section. The 20m Carolina Windom in the attic made contacts but electrical noise from the proximity of wiring was pretty bad. 5-30 MHz: MLB Balun Receive Balun: MLB Marine Balun Kit Receive Balun for Sailboats:. All antennas need a common mode balun. As you can see this turned out to be very stable and worth doing. The development of the Windom antenna was done by Loren Windom (W8GZ), who was a prominent American ham in the 1920s. A current balun is the proper choice for an OCF dipole, since it effectively chokes common-mode current from standing on the feedline. This antenna required a 1:4 balun, so I made one. Rick's son suggested some compound material, which we mixed and installed on Bob's baluns July 30. monopole and trapped vertical antennas or single wire vertically erected antennas such as the inverted "L" and others. Even the balun is easy to build. The question is whether it is its popularity that is the reason for cries for help, or whether there is something inherently high risk in the ‘design’. The Off Centre Fed Dipole (OCFD) has been used for many years, the most famous being the Carolina Windom. A six-band, HF Windom antenna April, 1997 This Windom antenna was marketed in the late 70's and early 80's as Smithe's Windom. The center of the antenna was about 20 ft over the top of the house. This page contains all websites related to: Balun. I do not know if it was a voltage balun. It seemed to kick up as high as 2:1. Especially OCF dipole sometimes called Windom needs enough common mode reactance because the feeding point is hot. OCF 7 Band 80-6 Windom Hard Drawn Copper Review Dave Davis on 4th Feb 2018 This is my second OCF antenna I have purchased, the first was the 8 band 160 through 6 for my cabin antenna which works great. Key Features/Specifications:. They're easy to build. It's the real CAROLINA WINDOM® 80 with only one-half the support length needed. 2% from one end. Call for information and scheduling. The “Micro Series” Off Center Fed antenna is made using #18 stranded insulated wire and a BNC for connection your coaxial cable. With an eventually extra choke balun the 3 - 4-m coax used for the balun becomes a part of the recommended 27. Thursday, April 18, 2019 Building a "Dirgly Balun" to Make a Windom Antenna from a RadioWavz OCF. The antennas produced by us are all manufactured by Nigel Booth, M0CVO. Windom antenna is an off center fed dipole,The WA-4 is a typical Windom type antenna that can operate at 40m,20m,10m,6m band making it an ideal portable antenna. 9 feet) Cut this length of wire at a point 37. Having used wire antennas in many. By serendipity, it also covers the 17 and 2 meter bands. 29 from Ham Radio. The carolina windom adds a 10 foot section hanging from the feedpoint. Transmit Balun Measurements: Now let's measure some transmitting common-mode chokes! These chokes are all 1:1 current baluns. 25 Meter band) Hello world or maybe just Locals! Building a "Radio-less" Allstar Node; 5:1 Broadband RF Transformer. Another Antenna for the Field Operations - The Windom or the Off Center Fed Dipole Posted on June 14, 2018 by ve3ips This is another antenna variation of the dipole probably created by Mr. OCF Dipole Antenna for portable HF Dipole Antennas : Alpha Antenna. 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. Key Features/Specifications:. Random Length Radiator Wire Antenna Windom Antenna Windom Antenna - Feed with coax cable Quarter Wavelength Vertical Antenna Folded Marconi Tee Antenna Zeppelin Antenna EWE Antenna Dipole Antenna - Balun Multiband Dipole Antenna Inverted-Vee Antenna Sloping Dipole Antenna Vertical Dipole Delta Fed Dipole Antenna Bow-Tie Dipole Antenna. This example (my realizazion) cover between 10 to 40 mt. But that leaves all the weight of your balun, coax, and (in the case of a New Carolina Windom) RF choke unsupported by anything but the antenna-wire itself. The Carolina Windom® 2 manages this principle by placing a "Line Isolator" back form the feed-point of an offset dipole. Used a G5RV for years then had a break of some 20 years. The differences between the New Carolina Windom antenna and Windom?s original is that the Original Windom is not a dipole. Windom Balun More Here is an easy to make home brew antenna that can get you on the air working satellites or be built for use as a portable. End Fed Half Wave Antenna Coupler (EFHW) 1:1 Voltage Balun for HF wire dipoles; 9:1 Magnetic Longwire Balun / Unun; Simple CW Touch Keyer Circuits; Capacitive CW Touch Key Circuits; 2N6084 144MHz FM Power Amplifier; G3XBM 472kHz. , depending on a 40m or an 80m/160m. I have a tuner, but experience has told me that RFI burns your lips, so never mind that idea. EMF-P Wire Antenna 0. W2AU Baluns are transformer designs with ferrite cores to provide 95% minimum coupling efficiency. DIPOLE ANTENNA - 20-10m - Windom Style Off Set - £39. As a matter-of-fact, we also build Windom antennas for 11 other companies, and distributors world wide. Pictured is a 4:1 balun. For multi-band operation a choke balun is most appropriate with a 1:1 impedance ratio. The search for a simple broadband, multiband antenna with acceptable SWR over the entire 80/75-meter band continued with the publication of the article by Witt, AI1H, in April 1989 QST. I am perplexed that the random wire is 'deaf' across all the bands but transmits much better than the. Build an HF Ham Radio Dipole Antenna It is easy to build, construct and erect a dipole antenna for the HF bands: 160, 80, 40, 20, 15, 10 metres, etc using a few simple components at a minimal cost and get great results. Supplied with 5 ferrite beads, to fit rg58 coax, adds a little NVIS to the system in a similar way to a Carolina windom. 07 - Windom Antenna - Feed with coax cable. In my book “Introduction to Antenna Modelling” I talk about how you can get more bands out of a 40m off centre fed dipole (OCFD – sometimes incorrectly called a Windom) by adjusting the feed point position. The measurements below are for building a simple Dipole Antenna. homebrew 4 to 1 balun untuk windom antenna Ini adalah 4-1 balun yang diperbuat daripada speaker wire,nampak mudah kerja-kerja driling agak sukar kerana ketepatan lubang adalah penting,bahan lain adalah cable lug,pvc pipe 11/4". that includes the grasswire and other beverage antennas. BALUNS 101 Learn Just Enough to be Dangerous! a dipole antenna to an unbalanced input such as a 50- New Carolina Windom Antenna. I found > it to be of little value on 160 and 80 and worth even less on the > higher bands. A balun is simply a device that interfaces an unbalanced system (coaxial feed line) to a balanced system (the dipole), providing the antenna and the feed line with the ter- minations they need, and keeps the feed line from becoming part of the antenna. Installation The best location for this antenna is as high and far away as possible from utility wires, other antennas, and other structures. Other types of antennae There are some types of antennas that seem to defy simple definitions. Specifically, a DX Engineering BAL200-H10-AT 4:1 balun. The Windom is an antenna that enables operation, 80 through 2 meters, without an antenna tuner. Browse photos of 4 1 Air Balun, 1 1 Choke Balun, 9 1 Balun Winding, 4 1 Current Balun Single Core, 9 1 Balun Kit, Homemade 4 1 Balun, When to Use a Balun, Build a 4 1 Balun, Antenna Balun, 4 1 Balun Homebrew, Homebrew 4 1 Current Balun, 4 to 1 Balun Schematic, 4 1 Current Balun Construction, 4 1 Balun Construction, 4 1 Balun Design, 9 1 Balun Construction, 4 1 Guanella Current Balun, Current. I do not know if it was a voltage balun. I have a 2KFA and a Win 7 computer. Off Center Fed Antenna for 40, 20, 10 and 6 Meters 40-6LPOCFD. Carolina Windom 80m long. Figure 4 AIM 4170C antenna analyser plot viewing a 100ohm resistive load through the Ruthroff voltage balun. The feed-point of this type of antennas (off center) has an impedance of about 300 Ohms. Feeding a random/long wire or at the base of a multi-band vertical. Since this is a proprietary antenna, I doubt you will find published information. CAROLINA WINDOM Index. Antena Hd Morse Code Ham Radio Antenna Wire Audio Hams Geeks Conversation Engineering. Before we get going let’s try and understand what the OCF dipole is all about. 20 Offset Balun 28 antenna wire 110 antenna wire Yellow Core 21 tapped 50 uH inductor (20050 Ohms) The Carolina Windom. Folded Marconi Tee Antenna 8 10. It is a directional antenna that provides great performance. Cy Gacuzana] [Permanent Link] To: [email protected] Folded Marconi Tee Antenna 8 10. The search for a simple broadband, multiband antenna with acceptable SWR over the entire 80/75-meter band continued with the publication of the article by Witt, AI1H, in April 1989 QST. This link is listed in our web site directory since Sunday Jul 29 2007, and till today "Windom Antenna with 4:1 balun" has been followed for a total of 7740 times. 10 - Zeppelin Antenna. 5:1 on 6, 10, 20, 40 & 80m bands and can be operated without an antenna tuner. The TDK Corporation part realizes the balun-, filter- an impedance matching-function and is custom made to be operated with CC253x. Current type 4:1 (200:50 Ohms) BALUN is another product designed for OCF antennas (Off Center Fed) also known as Windom antenna. I am perplexed that the random wire is 'deaf' across all the bands but transmits much better than the. Baluns such as ours that provide high levels of feedline isolation are ideal for high efficiency antennas, but should not be used on WARC bands or 15m unless power does not exceed 200-300 watts especially for FT8 and RTTY carriers. What about the Carolina Windom®? It’s interesting some antennas rely on this outside coaxial cable leakage for their proper operation. The recipe for the New Carolina Windom is simple: Cut a half-wave length of antenna wire for the lowest frequency you'll use (468 / 7. In the 23rd edition of the ARRL Antenna Book on page 10-7, there is a reference to the "Carolina Windom", which sounds like what you built. 2 dB over the so-called carolina Windom. This is a 4-1 made from a wire speaker, it seems easy drilling works are quite difficult because the hole accuracy is important, the other material is cable lug, pvc pipe 11/4'. Build an HF Ham Radio Dipole Antenna It is easy to build, construct and erect a dipole antenna for the HF bands: 160, 80, 40, 20, 15, 10 metres, etc using a few simple components at a minimal cost and get great results. Inverted-Vee Antenna 10 15. To achieve this the Windom uses a 4:1 voltage balun, which matches the antenna’s leg voltages and then uses a separate 1:1 choke balun to isolate the feed line from the vertical radiator. Been a ham for quite awhile and favorite antenna has been a 160 meter dipole fed with ladder line. Balun 4: 1 (50 Ohms Ohms -> 200. The New and Improved Carolina Windom Antenna and ½ Wave End Fed 20 Meter Vertical and Sloping Wire Antennas EZNEC analysis by Pete Rimmel, N8PR. tional Carolina Windom since it was the first attempt at creating this specific type of multi-band antenna based loosely on Windom’s original concept. A long wire antenna for portable operation. The main differences in these variations are the slight differences in the position of the feed-point and the impedance of the baluns used for matching. OCF/Windom Antennas I thought I would take time to share my HF antenna experiences since I am very happy with the antenna I have up now. My signal reports are 579 and higher and often asked what kind of antenna I am using. W2AU Baluns are transformer designs with ferrite cores to provide 95% minimum coupling efficiency. Antenna HF bultibanda DELTA LOOP balun rg59 75 Ohm i6ibe. Having this feedpoint a third way along the antenna gives an impedance of 200 ohms, therefore a 4:1 balun is added at the feedpoint to alter the impedance to 50 ohms for modern transceivers. Tags: carolina windom antenna Windom Antennas ( 160 -10m / 80-10m) Windom 160 - 10m Windom 80 - 10m Length 78m 42m Weight 2. Besides my primary interests are working only CW on 40, 30, 20, and 15 meters. I would appreciate some direction on my Carolina Windom antenna. Technical resource and information on receiving and transmitting antennas, amplifiers, radios, baluns, for 160 meters 80 meters and other low bands. The measurements below are for building a simple Dipole Antenna. Home of the original WINDOM Our Favorite Multi-Band Antenna The number "1" HAM station, field-day, and contesting, wire type antenna in the world today. A Hawaii-based Amateur Radio Antenna Blog focusing on the theory, design, and use of homemade antennas. Details about Off Centre Fed Dipole Windom Style Antenna 80-6m Bands Hf Antenna Off Centre Fed Dipole Windom Style Antenna 80-6m Bands Hf Antenna Atu 4:1 Balun. The antenna also uses an RF choke 11 or 22 ft. This is achieved by adding an RF choke below the 4-1 Balun. 10 - Zeppelin Antenna. As with all aerials the aerial should be as high as. Specifically, a DX Engineering BAL200-H10-AT 4:1 balun. Started by taking the 2 baluns apart to see what they were made of. Conrad Windom Delta-loop 14 MHz 144 MHz 18 MHz 21 MHz 24 MHz 28 MHz 50 MHz Dipoles Broadband Monoband Multiband Tribandes Double Bazooka Folded dipoles Long wire Loop filaires Quagi Verticals Yagi 14 MHz 144 MHz 18 MHz 21 MHz 24 MHz 28 MHz 430 MHz 50 MHz Baluns 1:1 baluns 1:1,5 baluns 1:13 baluns 1:2 baluns. The absence of traps and the 1. Chameleon Antenna CHA WINDOM 40 Portable HF 7. Suppose 80m was sacrificed by making the antenna half size resulting in a matched antenna for 40, 20 and 10m. 95 but this cost nothing like that! Here is the 4:1 balun. Complete with strain relief rings. Balun 4: 1 (50 Ohms Ohms -> 200. Fed at 34% from the end, it uses a single feed wire and can Easier to hide in antenna restricted areas. To achieve this the Windom uses a 4:1 voltage balun, which matches the antenna’s leg voltages and then uses a separate 1:1 choke balun to isolate the feed line from the vertical radiator. In this video, Faith Hannah (AE4FH) builds what she calls a "Dirgly Balun" to use with the kids' RadioWavz Off Center Fed Dipole, so she can make the antenna into a pseudo Windom antenna. Historically all began with the Windom, a multi-band antenna first described in 1929 by Loren G. For more unusual antennas, visit my web page. For VHF, the J-Pole became the antenna of choice, just as the Windom took its place as the antenna of choice for the lower (HF) bands. It all started with the Windom antenna… Windom Antenna The Windom was once a very popular multiband antenna. Antennas - Antenna Windom FD-3. com OCF Windom 135 Ft 80, 40, 20, 17, 12, 10. Baluns are not always necessary. vertical antenna; beam antenna; cb antenna mobile; cb extension speakers; cb microphone s & accessories; plugs & adapters ; cb power supply; scanners and antennas; cb and 446 handhelds; antenna masts - poles - brackets; coax cable; amateur radio. Having a 50m fibreglass tape measure is essential when building HF antennas. Based upon these parameters, I have found what I consider to be the perfect antenna. Call for information and scheduling. In most cases, feedpoint is moved to 1/3rd from the side, and antenna is feed either via 4:1 balun and coax, or apropriate length of 450 ohm ladder line, which allows decent SWR on most amateur bands. New 4:1 voltage antenna balun. considering using an Off Center Fed Dipole or a G5RV or a Carolina Windom. Unless otherwise labeled, DX Engineering 4:1 ratio baluns have the advantage of being current baluns. It is very well grounded! Net controls on 40 & 80m tell me it's the best signal I've had yet & with a small lot, that's important to me. The coax attaches to a 4:1 current balun with the positive side of the balun feeding the longer wire. Build an HF Ham Radio Dipole Antenna It is easy to build, construct and erect a dipole antenna for the HF bands: 160, 80, 40, 20, 15, 10 metres, etc using a few simple components at a minimal cost and get great results. Some Windom-derived antennas enhance feeder radiation on purpose. Over many years, antenna dimensions and feed locations have not changed much from the original single-wire design, whereas balun feed impedances have decreased from 500 Ω to 300 or even 200 Ω!. Building a Windom HF Antenna Kevin Reeve, N7RXE [email protected] What is a Windom • It is an off-­‐center fed dipole and can be constructed as a mulFband antenna. As with all aerials the aerial should be as high as. Windom – Similar to the OCFD. 25 Meter band) Hello world or maybe just Locals! Building a "Radio-less" Allstar Node; 5:1 Broadband RF Transformer. , depending on a 40m or an 80m/160m. They may not all be totally new designs but, I hope that they are an improvement on the originals. I have used a Windom antenna here for a number of years because a short mast is available at the house and the back garden is much longer than the front. Above is a 13 element (see element count) TV aerial [above left] and 3 element DAB aerial [above right], illustrating the main components found on Yagi type aerials How to test a tv antenna balun. The larger the wire, the wider the bandwidth. The coax fed "Carolina Windom" OCFD types are usually tapped around the 200 ohm point where a 4:1 transformer is appropriate. Electromagne2c' Wave'Polariza2on' • Electric'and'magne2c'waves'are'at' right'angles'to'each'other' • Magne2c'wave'dissipates'within'a' few'wavelengths'of'antenna. Been a ham for quite awhile and favorite antenna has been a 160 meter dipole fed with ladder line. Current type 4:1 (200:50 Ohms) BALUN is another product designed for OCF antennas (Off Center Fed) also known as Windom antenna. And check out my Books for a dozen topics about HF antennas. These can be used to add wire to the overall antenna to fine tune the VSWR if needed. CHAMELEON ANTENNA CHA WINDOM 40 Antennas are designed for use on 40m, 20m and 10m without an ATU. Tests have shown that the CAROLINA WINDOM will out perform conventional antennas under similar conditions…. Antenna wire of PVC coated steel wire. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end. com in a single category. As a matter of interest, look close at both the J-pole and the Windom, and you might find a close resemblance and maybe even some. When building or replacing the balun at the feedpoint of a Carolina Windom that incorporates a vertical coaxial radiator, a voltage balun like our model 4125 should be used so RF will pass to the vertical radiator. Windom 160 - 10m Windom 80 - 10m Length 78m 42m Weight 2. The search for a simple broadband, multiband antenna with acceptable SWR over the entire 80/75-meter band continued with the publication of the article by Witt, AI1H, in April 1989 QST. OCF, Windom, FD4, and Carolina Windom. A Windom Antenna by K3MT. The term off-center-fed (OCF) dipole is preferred. One indication that a balun is needed is when the VSWR of an antenna varies if the feeders is touched or moved. The main differences in these variations are the slight differences in the position of the feed-point and the impedance of the baluns used for matching. In my case it was cut for the 80 metre band and was approximately 42 metres long. I found instructions online at Ham Universe (click here for the page) for a simple and cheap coax 1:1 choke balun. The main category is Windom antenna that is about Windom antenna links. Introducing the W8AMZ 80-6m OCF / Windom Multi-Band Antenna using a 4:1 Balun and rated for 2 KW. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. Is this the performance king? CAROLINA WINDOM® 40 Compact™Carolina windom. Discover ideas about Antena Hd. Thanks everyone! Dave, The Dorchester County EOC in South Carolina is experimenting with various antennas for base and field work. The best match. End Fed Half Wave Antenna Coupler (EFHW) 1:1 Voltage Balun for HF wire dipoles; 9:1 Magnetic Longwire Balun / Unun; Simple CW Touch Keyer Circuits; Capacitive CW Touch Key Circuits; 2N6084 144MHz FM Power Amplifier; G3XBM 472kHz. Add your 50 ohm coaxial feed line, suspension rope and go can be hung flat or inverted v configuration. I am very pleased with it, it works quite well locally and on DX. The absence of traps and the 1. Its reputation for excellent performance is so good that it served. It is recommended to use a RF choke to avoid currents returning to the transceiver. Unless otherwise labeled, DX Engineering 4:1 ratio baluns have the advantage of being current baluns. Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Each balun and antenna is hand crafted, built right here in the USA. Introducing the W8AMZ 80–6m OCF / Windom Multi-Band Antenna using a 4:1 Balun and rated for 2 KW. Don’t know the maths or the theory, but this antenna works as well as a G5RV. The balun is located at one third of the antenna length. By serendipity, it also covers the 17 and 2 meter bands. 2kg Wire Material Flexible, Zinc coated steel wire. 15 - Sloping Dipole Antenna. 70 M triband vertical. This is a Custom Built version of the CAROLINA WINDOM® 40. The long end of the antenna is 89 feet long and runs into the back yard. It worked fine with the. Specifically, its size01265feel. It's the real CAROLINA WINDOM® 80 with only one-half the support length needed. The Off Centre Fed Dipole (OCFD) has been used for many years, the most famous being the Carolina Windom. What about the Carolina Windom®? It's interesting some antennas rely on this outside coaxial cable leakage for their proper operation. The page describes a Windom antenna with a 6:1 balun transformer. Delta Fed Dipole Antenna 13. a multi-band dipole antenna used in amateur radio Disambiguation page providing links to topics that could be referred to by the same search term This disambiguation page lists articles associated with the title Windom. And since I moved back to the country late 2005, I had all opportunities to set up antenna’s. It is almost impossible to eliminate common mode signals on an OCF's transmission line. Carolina Windom Poor Transmit Performance My QTH consists of a Pixel amplified mag loop antenna for HF receiving. The 20m Carolina Windom in the attic made contacts but electrical noise from the proximity of wiring was pretty bad. About 5 years ago, I was looking for a relatively simple to build, wire antenna that would fit in a 66' space. My preferred balun for wide and multi-band use is not really a balun as such, it is a choke. Tom N4KG On Fri, 7 Feb 2003 "Van Fair" writes: > 9 months ago I purchased and installed a carolina windom 160. This antenna is designed to be used at heights of only 25 to 45 feet. Windom antenna 10-40 mt Well known antenna. NEW Carolina Windom shown cut for 40, 20, 15 and 10 meters. You are eligible for a full refund if no ShippingPass-eligible orders have been placed. The recipe for the New Carolina Windom is simple: Cut a half-wave length of antenna wire for the lowest frequency you'll use (468 / 7. 5 to 30 MHz, including WARC bands other than 10. THE M0CVO 4:1 High Power Balun - EUR 36,71. Windom Balun More Here is an easy to make home brew antenna that can get you on the air working satellites or be built for use as a portable. With an antenna tuner, you can operate 12, 15, 17, 30 & 60m bands with ease, where most. G5RV Dipoles An Image/Link below is provided (as is) to download presentation. Antenna for the 220 MHz Band (1. If you prefer to use Coax, this is an alternative to using Ladder line and a tuner. This is not really a Windom at all, but an Off Centre Fed dipole with a radiating feed line. DIPOLE ANTENNA - 20-10m - Windom Style Off Set - £39. Why my 80/40 antenna was non standard lengths to fit it on the block I had to bend some of both ends at 90 degrees down and they came very close to the trees used to suspend them. In the 1980’s the “Carolina Windom” was developed. One of the antennas I found was the Windom. It's up to the designer to select the best design for the job at hand and to utilize that design in the most efficient way. 6 out of 5 stars 2. I bought it to go with a folded dipole from DX Engineering. This page contains all websites related to: Balun. The New Carolina Windom Antenna As with all ham stations QRO or QRP, ten percent of a station's success in quality QSOs is the equipment and the operator. Besides my primary interests are working only CW on 40, 30, 20, and 15 meters. Discover (and save!) your own Pins on Pinterest. I wanted to make a all band antenna without the long tail of a G5RV. to try some multi-band wire antennas and compare performance. It's the real CAROLINA WINDOM® 80 with only one-half the support length needed. I am wanting to remove the 4:1 balun at the Carolina WIndom (CW) and replace it with a 300 ohm twin lead, and about 10ft down (40mtrs) install a 1:1 balanced feedline (current) isolation choke. Whatis(aWindom(• Itis(an(offAcenter(fed(dipole(and(can(be(constructed(as(a(mulFband(antenna. In the graph below I have plotted what MININEC predicts for the impedance of an end fed half wave antenna versus the "counterpoise" length. However this idea has fallen from favour with further technical developments in other areas, and the legalisation of the “WARC bands” at 30m and 17m. Traditional baluns, such as the coax-wound toroidal 4:1 Guanella, are not designed to handle the extreme impedance variations of all-band doublets. I did some research and remembered that awhile back I had received an antenna from a fellow ham that had been struck by lightning. A line isolator is also called a common mode choke, a 1:1 balun, a 1:1 unun, a current balun/unun, a feed line current choke, and a 1:1 Guanilla balun/unun/choke. "I just wanted to share with you just how great your Model 4116- 4:1 Hybrid Balun 1. Both of these baluns are readily available and relatively inexpensive. As a matter of interest, look close at both the J-pole and the Windom, and you might find a close resemblance and maybe even some. 08 - Quarter Wavelength Vertical Antenna. Current type 4:1 (200:50 Ohms) BALUN is another product designed for OCF antennas (Off Center Fed) also known as Windom antenna. Pictured is a 4:1 balun.