Balun For Carolina Windom Antenna

If you are looking for maximum signal using a Narrow Mode such as CW or SSB, it is pointless using a wideband antenna (ergo balun) in which case a narrow bandwidth balun is best. The basic Windom is a half wave length long wire. Anyone who feels like it is welcome to join us for a general “rag-chew”. hence the 4:1 balun. a 4:1 VOLTAGE balun and 1:1 CURRENT balun (line isolator) works well in this application. It therefore made sense to have an OCF antenna. Single articles:. This is the complete 40-page product manual for all of the RADIO WORKS'™ products prior to the introduction of the CAROLINA WINDOM® Compact™. This antenna is built using a 2 X 2-in wooden. From an electrical standpoint the best way is to hang the center at the apex. The matching tuner must be always readjusted when switching from one band to another. 25 Meter band) Hello world or maybe just Locals! Building a "Radio-less" Allstar Node; 5:1 Broadband RF Transformer. Magnetic Loop Antennas; Homemade Carolina Windom antenna; Homemade 20 metre band loft dipole! Baluns and UnUns. Even if you managed to get it to ¼ wave up at 160 Meters, about 70 feet, it would be problematic. This is the same design as the 'Carolina Windom 80 Special' You can buy one of these for £109. The other interesting feature is the 10 feet of coax from the Balun and terminated in a choke or line isolator. This is compared to my full-size 75 meter dipole at similar height. The original windom of the 1920's had a single wire (vertical) feedline. After many unsuccesfull attempts to use a T200-2 and then a T130-2 core, I decided to try a T140-61 as I had one spare. So under orders I removed the Windom and a few other antennas and instead constructed my first cobweb as a single replacement. monopole and trapped vertical antennas or single wire vertically erected antennas such as the inverted "L" and others. The page describes a Windom antenna with a 6:1 balun transformer. balun) at the feed point, together with an antenna tuner (matchbox) in the shack, and that usually works pretty well. This Windom antenna was marketed in the late 70's and early 80's as Smithe's Windom. The apex of the antenna is hung from the peak of my roof. I personally do not like open wire feed line, for reasons discussed in my other articles. The 20m Carolina Windom in the attic made contacts but electrical noise from the proximity of wiring was pretty bad. ________________________________________________________ L'antenna LONG WIRE (o beverage) è una antenna funzionale, economica e facile da realizzare, ideale per chi. The formula to compute the length is the standard 468/frequency with the 4/1 Balun at 62. 76,87 EUR; Achat immédiat. Omni-Gain Vertical Collinear Antenna by WA6SVT. The Carolina Windom, however, wants the feed line to radiate (at least a portion of it) in order to gain the vertical radiation and some performance. Make a 2 kW Windom Balun. I guess there was some "magic" in the original 160 balun to get, what is essentially an 80m. 80m Reduced Length Sloper. Receiving antennas including Beverages and Beverage Antenna Construction, Loops, K9AY, Pennant, Flag, EWE, Slinky Beverage Antennas, vertical arrays, magnetic loop antenna, and terminated loop arrays. , Cummins & Associates North, Cambridge Electronic Industries Ltd. I found instructions online at Ham Universe (click here for the page) for a simple and cheap coax 1:1 choke balun. The result is an inverted-vertical antenna located high in the air and free of ground losses. Home Brew Carolina Windom 40 I have been experimenting with wire antennas since I got my technician ticket in November of 2010 and it realy took off when I passed my general in Jan of 2011. pdf: A New Horizontal Polarized High Gain Omni-Directional Antenna. The letters “ff” after a page number indicate coverage of the indexed topic on succeeding pages. Including End Fed Half Wave antennas. That is where the current is at a maximum on the lowest resonant frequency. The long end of the antenna is 89 feet long and runs into the back yard. The differences between this antenna and Windom's is that the Original Windom is not a dipole. If you look closely at the image, can see coaxial wound 1:1 current Balun underneath voltage stacked above it. Richard warned of significant risk of RF on the outer (inner?) braid of the coax. The principle of operation of a Bazooka Balun is presented on this page. Radio Campo W6CAW / W6SLW. Line Isolation / Choke Balun: A line isolation balun isolates the antenna elements from the coaxial transmission line so that power is radiated by the dipole antenna elements and not by the feed. Only one application where this balun is not recommended. An OCFD is a very simple antenna design and easy to make. It is 17 bifilar turns on a half inch ferrite rod. Installation instruction addendum for all newer antennas are also listed in this link. The 20m Carolina Windom in the attic made contacts but electrical noise from the proximity of wiring was pretty bad. The page describes a Windom antenna with a 4:1 homebrew transformer. uk 01922 414796, for all your radioworks antenna needs In stock fast delivery. Ham Radio Antenna Good Communication Hams Technology Ham. A Windom Antenna by K3MT. Be aware some versions of the Carolina Windom do not cover all bands. Let me state my working conditions: I'm using a Kenwood TS-2000 through an LDG AT-11MP then throught an MFJ-1700C antenna/rig switch to the Carolina windom. It will not hurt the antenna’s efficiency if you bend the ends of the antenna slightly to make it fit into the space you. Now, how was a Windom antenna developed? It began with a center-fed, half-wave dipole. 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. La antena se alimenta con un balun relación 1:4, siendo la línea coaxil de alimentación simultáneamente un radiador vertical (cable coaxial de 50 ohmios), además de línea de transmisión. The apex of the antenna is hung from the peak of my roof. These are the parallel-wire type of multi-band dipole kits with special spacers to keep the different dipoles separated all connected to a common feedpoint and 1. The shorter wire is 44 feet long and is supported at the apex height of 25 feet by a birch tree in the front yard. One of the antennas I found was the Windom. space restricted environments the antenna can be installed at an angle or non straight layout. If you use ladder line or twin lead for your antenna, this balun can be installed remotely allowing you to run a short length of coax into your tuner or transceiver. I would appreciate some direction on my Carolina Windom antenna. 00 delivered. The only difference is the feeder. Enter the New Carolina Windom. I wanted to make a all band antenna without the long tail of a G5RV. It will provide years and years of great service and great contacts. 19 may 2011. Likewise, we build BALUNs for more than 15. Discount prices on Antennas, BALUNs, HAM radio test equipment, and Amateur. Windom, bercallsign W8GZ. This antenna consists of two poles, through which the RF current flows. DIY CAROLINA WINDOM - idc-online. AI4JI's Off-Center Fed Dipole / Windom Antenna Fan Page. The diagram below shows the 4:1 balun. However, looking at the Carolina Windom in Bill Orr's "HF Antenna Handbook," a 4:1 balun is indeed used to connect the feed line to the antenna. I replaced it with the 4:1 balun mentioned above and now it won't tune 160m. If hanging the antenna from a tower, you need to use a horizontal 5 foot or longer PVC or fiberglass pole to keep the antenna away from the tower. See more ideas about Ham radio antenna, Ham radio and Ham. EZ format file, with. pdf PDF-Dokument [287. This accounts for the excellent performance of this antenna system. Most transmitting antennas link from the top of this page. It was designed to cover 80, 40, 20 15, and 10 meters. 36m (34ft) Feeder: 50 Ohms Matching: Balun/Line isolator. The offset feed line may be an advantage in some cases because it allows you to use a shorter. I have now been working part with different coil connections to my vertical multiband antennas for portable traffic. This antenna is built using a 2 X 2-in wooden. The big difference is in the balun that you use to feed the antenna. A touch of Class, The Windom and the J-POLE By Glynn E. The goal that I set out was to design an HF antenna, with a VSWR of 3÷1 or less over the full bandwidth of as many amateur radio HF bands as possible, with a preference for the low- and the non-WARC bands. Choke UNUNs. OCF Dipoles - About windom antennas and OCF dipoles, tricks on covering more bands moving feed-points and potential problems. There are antenna installation hints and grounding information. Or anyone that has made a balun for a Carolina windom fed from 75 ohmsshould i use a 3 to 1 voltage balun then another un un to the coax. Windom, W8GZ who first published details of his. ZS6BKW G5RV with the added benefit of 1:1 balun The Ultimate Classic G5RV with the added benefit of a 1:1 balun This is one of the most rugged and dependable OCF/Windom antennas on the market today. The numbers I give in these articles are as close to being real as possible. 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. 50Ω - 200Ω, 1-30MHz. The page describes a Windom antenna with a 4:1 homebrew transformer. But an off center feed dipole fed with coax didn't sound bad. 2 dB over the so-called carolina Windom. The Windom is an uncomplicated, easy to build, harmonic related antenna. Sometimes, you have to let your imagination run wild, especially when it comes to antennas. hence the 4:1 balun. Specifications Frequency Coverage 160 - 6 meters + 30, 17, 12 WARC Gain As much as 10 dBd* reported at most installations Radiator Length Horizontal 265' and the Vertical Radiator is 22' Feed line 50 ohm coaxial cable, RG-8X recommended Matching method Dedicated matching transformer. 368 GHz as possible using the LNB range extender for the Spectrum Analyser (also from last time). Here is another model with coaxial feeder, which is compatible with Solid States - 50 Ohm output transceivers. antenna is no longer made. So that being said the measurements vary depending on who you talk to. This more recent version has some very interesting characteristics. Catalog of products, antenna data and techniques, and links. Dumm nur, dass ich dazu noch einen 12m Mast mitschleppen muss, um die Windom in eine vernünftige Höhe zu kriegen. Early last winter my noise level on 40 and 80 meters went up from an average of S5 to almost S9 all the time, day and night. However, looking at the Carolina Windom in Bill Orr's "HF Antenna Handbook," a 4:1 balun is indeed used to connect the feed line to the antenna. Well, as an update to my Carolina Windom project, I find that the CW OCF dipole cut to typical dimensions works well WITHOUT a balun but does not work at all WITH a balun. Antenna windom, I7SWX: Carolina windom - bands 20, 17, 15, 12 and 10: Carolina windom, YC1RHS: Center Fed Dipole Windom Antenna, AI4JI: Coaxial fed Windom Antenna, SV1BSX: Dipolo windowm sbilanciato: Homebrew4 to 1 balun UNTUK windom antenna, 9M2MGL: Homemade Carolina Windom antenna, M0UKD: La Windom di, I7SWX: L'antenna Windom, IK0IXI: L. I've also lost my "antenna tree" due to rot, so I'm now working on configuring an inverted L so I can get my little TS-120 back on the air. Antenna Properties and their impact on Wireless System Performance. antenna installation tool; balun's & unun's; broadband antennas; citizen band base antenna's; dipoles with 1:1 baluns; double bazooka ; dx ocfd (windom) end fed half wave antenna (efh) end fed zep; g5rv; high power balun unun 3. Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. I chose this as my first antenna. Measurements are in feet, the insulators speak for themselves and the vertical radiator is 50 ohm coax. NVIS Antenna Information. "Buck" Rogers Sr (68 years as K4ABT) The J-POLE has been around since the early days of HAM Radio, and is a direct descendant of the "Windom" Like the Windom or ZEPP, the J-POLE is a spin-off, or a modified WINDOM for VHF and UHF. Don’t know the maths or the theory, but this antenna works as well as a G5RV. Now, how was a Windom antenna developed? It began with a center-fed, half-wave dipole. This particular version of the CW OCF dipole uses 300 ohm twin lead feedline terminated after 33 feet to a 4:1 balun. Perhaps too many new hams embarking on their first HF adventures think only of resonant dipoles fed with coaxial cable and plugged directly into the transceiver's output connector. Unlike typical antennas, this is a non-resonant, Off Center Fed Dipole (OCFD) antenna. The shorter wire is 44 feet long and is supported at the apex height of 25 feet by a birch tree in the front yard. Unique to a Current Transformer 4. 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. Having received some very good advice about the Carolina Windom, I now ask a question to which I THINK I already know the answer. The end of winding 2 ( single blue wire ) is soldered to the inside of the SO239 a second wire is also soldered to connect to our antenna. Connection -- Specialist in RF Connectors and Coax. 9 out of 5 stars. Shop with confidence. Antenna for the 220 MHz Band (1. Make a 2 kW Windom Balun. The RadioWavz DX (OCF) Windom is ideal for those of you who do not use a tower and beam. However, looking at the Carolina Windom in Bill Orr's "HF Antenna Handbook," a 4:1 balun is indeed used to connect the feed line to the antenna. The Balun Designs 4116ocf has been highly recommended. The coax fed "Carolina Windom" OCFD types are usually tapped around the 200 ohm point where a 4:1 transformer is appropriate. The choke balun at the bottom of the 22 feet radiating vertical effectively isolates it from the coaxial feedline going down to the transceiver. Discover (and save!) your own Pins on Pinterest. I put a little pulley on the top to be able to lower the balun without have to lower the mast. With an eventually extra choke balun the 3 - 4-m coax used for the balun becomes a part of the recommended 27. I would appreciate some direction on my Carolina Windom antenna. BALUNS 101 Learn Just Enough to be Dangerous! a dipole antenna to an unbalanced input such as a 50- New Carolina Windom Antenna. hence the 4:1 balun. The extended G5RV and other flat tops are just dipoles with a different feed method. a 4:1 current balun is normally used. The coax attaches to a 4:1 current balun with the positive side of the balun feeding the longer wire. Tests have shown that the CAROLINA WINDOM will out perform conventional antennas under similar conditions…. Windom balun made with surplus ferrite rods. Well, The final parts have fallen into place today. 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. The G5RV Multi-Band Antenna Stranded Copper HD Avoid kinks when Weather-proof connector 450 ohm Matching Section 6" Ladder Line TO 52 Ohm coax Use any convenient length The antenna can be erected as an inverted vee ( 1200 minimum included angle). It's a grounded vertical wire connected to a horizontal portion acting as a top hat capacitance. 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. Members can go to the ARRL web site and follow the links to find out more. 61 m Short Side 13. I have been reading and researching trying different things and this is my latest attempt at making a wire antenna. The SWR is generally below 1. pdf PDF-Dokument [287. This is a very desirable characteristic on the lower bands 40 meters, 80 meters and 160 meters. Omni-Gain Vertical Collinear Antenna by WA6SVT. I've found, in my 35 years of experimenting, that some antennas work much better than predicted, and some work much worse (and that they're more likely to work worse than better HI HI ). Carolina Windom - ~81ft on the long side, ~50ft on the short side with a 4:1 VOLTAGE balun, 22-25ft of coax then a 1:1 choke balun. It's also ideal for those who want a high performance antenna with world class DX coverage 80, 40, 20, and 10 meters. This is evidence that the balun is not effective. Taking one vertical angle and frequency with another, the RadioWavz DX (OCF) Windom is Omni directional. Some Windom-derived antennas enhance feeder radiation on purpose. 635 depending on propagation. Anyone know how true this is and would the short 80 be better compared to the 40 on say 15/20m. The MMANA-GAL model of the K1POO antenna at 8m height shows that the antenna has a more complex lobe structure as the frequency increases. 73 m Total 38. From an electrical standpoint the best way is to hang the center at the apex. Get the best deals on Windom Antenna when you shop the OCF Dipole antenna BALUN 4:1 BL-41W-2K for OCF / Windom antenna with insulators Carolina Windom 160M. 40,54) ] RWUD15 RW ULTIMA DIPOLE 15 M ANTENNA MONOBANDA 85,00 RWVRD10 RW VERTICAL RADIATOR DIPOLE 10M ANT 129,00. I have a tuner, but experience has told me that RFI burns your lips, so never mind that idea. I know how to use antenna analysis tools, and I often do, but I take them with a serious grain of salt. The Windom still worked some off the end of the antenna, but better off of the side. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on all bands. Antenna is in inverted V with balun at 30 feet and ends at 20 feet. A very long, maintenance free life can be expected from this antenna. I am perplexed that the random wire is 'deaf' across all the bands but transmits much better than the. or just a 3 to 1 current balun. Well, as an update to my Carolina Windom project, I find that the CW OCF dipole cut to typical dimensions works well WITHOUT a balun but does not work at all WITH a balun. However, it is an easy matter to connect the vertical feed line to one side or the other and add a choke somewhere on the feed to get yet more interesting resonances. Krüger, DJ8EI / PA8EI, OV Bad Honnef, G09 Februar 2011. I've found, in my 35 years of experimenting, that some antennas work much better than predicted, and some work much worse (and that they're more likely to work worse than better HI HI ). Well, The final parts have fallen into place today. Carolina Windom Poor Transmit Performance My QTH consists of a Pixel amplified mag loop antenna for HF receiving. With 256 feet of wire, a Flat-top or Inverted-V are about the only support options available. com carolina windom www. By serendipity, it also covers the 17 and 2 meter bands. For my New Carolina Windom antenna I needed a choke balun to keep RF from getting back into my radio and finding new ways to make sure I stayed awake late at night. Current type 4:1 (200:50 Ohms) BALUN is another product designed for OCF antennas (Off Center Fed) also known as Windom antenna. In this week's session we discussed what we've found to be useful in many of our operating settings over the years. The best match. 61 m Short Side 13. Installation The best location for this antenna is as high and far away as possible from utility wires, other antennas, and other structures. In one Navassa DX'pedition, of the 33,000 QSOs made, more than 27,000 were accomplished with this antenna. Now, how was a Windom antenna developed? It began with a center-fed, half-wave dipole. Windom 160 - 10m Windom 80 - 10m Length 78m 42m Weight 2. It is 17 bifilar turns on a half inch ferrite rod. A variation called the Carolina Windom has a vertical radiation element. RadioWavz Wire antennas are the simplest practical antennas from a theoretical point of view; current amplitude on such an antenna decreases uniformly from the maximum at the center to zero at the ends. Carolina Windom to tune 160m at an SWR of about 10:1 I know I paid about $40 more for the CW 160 special than the CW 80 even though everything else appeared identical. Walt Maxwell, W2DU, put it succinctly10 when he said that a balun's "primary func-. 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. The old version was fed just by a single-wire connected on 1/3 of antenna's overall length or with an open-line feeder (later versions). DA: 45 PA: 8 MOZ Rank: 14. kl7jr 5 band pipe vertical - 20-17-15-12-10 meter vertical antenna project. Well, after the hurricane that hit H ali fax in 2003, my inventory of antenna supports was seriously depleted. antenna manufacturers, or compared to resistor loaded antennas, the Carolina Windom is a regular paragon of virtue. I personally do not like open wire feed line, for reasons discussed in my other articles. Windom, W8GZ who first published details of his. Trader's Net (Carolina Windom) Len Carlson N4IWL's article on a "New Carolina Windom" is the basis for some of the information I will base Thursday night's discussion on. Specifications Frequency Coverage 160 - 6 meters + 30, 17, 12 WARC Gain As much as 10 dBd* reported at most installations Radiator Length Horizontal 265' and the Vertical Radiator is 22' Feed line 50 ohm coaxial cable, RG-8X recommended Matching method Dedicated matching transformer. Bill designed the yagi with a freeware antenna modeling program written by W3CF. Let me state my working conditions: I'm using a Kenwood TS-2000 through an LDG AT-11MP then throught an MFJ-1700C antenna/rig switch to the Carolina windom. This Pin was discovered by Mike Conder. I have a full size G5RV flat topped in the garden, but hav been looking at the Carolina Windom antenna's as i want to get away from using ladderline. My favourite Carolina 80M Windom is supported at the balun by this mast. there's the 4125 which has only the voltage balun. Get ideas for your own presentations. It's also ideal for those who want a high performance antenna with world class DX coverage 80, 40, 20, and 10 meters. This accounts for the excellent performance of this antenna system. Why not take advantage of their big signal secret with the CAROLINA WINDOM®? This antenna can give you an S-unit or two advantage. 2-m length (fig»). I have been reading and researching trying different things and this is my latest attempt at making a wire antenna. above 50 ft. Note that if you want to use a vertical radiator (ala Carolina Windom), then you will need to use a 4:1 voltage balun rather than a current balun so that some of the RF fed to the antenna feed point will go down the feed line through the vertical element and give some vertical polarized output. A current balun is the proper choice for an OCF dipole, since it effectively chokes common-mode current from standing on the feedline. The best balun for both antennas, assuming they operated where standing waves on the feed system are low, are 4:1 baluns. Richard warned of significant risk of RF on the outer (inner?) braid of the coax. About New Carolina windom antenna The resource is currently listed in dxzone. Radio Campo W6CAW / W6SLW. Since our return home for the U S Marines (mid-fifties) we have built more true Windoms than all the other antenna builders combined. antenna is no longer made. It therefore made sense to have an OCF antenna. kl7jr 5 band pipe vertical - 20-17-15-12-10 meter vertical antenna project. uk 01922 414796, for all your radioworks antenna needs In stock fast delivery. 368 GHz as possible using the LNB range extender for the Spectrum Analyser (also from last time). Discount prices on Antennas, BALUNs, HAM radio test equipment, and Amateur. One example is the Carolina Windom (USA) which provides both, horizontally and vertically polarised radiation. A 1:4 current balun is a handy device if you use 450 ohm ladder line, 300 ohm television twin lead, or homebrewed 600 ohm balanced line to feed your antenna. Antenna windom, I7SWX: Carolina windom - bands 20, 17, 15, 12 and 10: Carolina windom, YC1RHS: Center Fed Dipole Windom Antenna, AI4JI: Coaxial fed Windom Antenna, SV1BSX: Dipolo windowm sbilanciato: Homebrew4 to 1 balun UNTUK windom antenna, 9M2MGL: Homemade Carolina Windom antenna, M0UKD: La Windom di, I7SWX: L'antenna Windom, IK0IXI: L. After many unsuccesfull attempts to use a T200-2 and then a T130-2 core, I decided to try a T140-61 as I had one spare. 20 Ağu 2019- birol4238 adlı kişinin Pinterest'te 337 kişi tarafından takip edilen "Antenna" panosunu keşfedin. I was a DX'er, so I tried the CAROLINA WINDOM® in the 75 meter band "DX Window. MP3, Video and Lyrics T2FD ON DX COMPAIRED TO A CAROLINA WINDOM →. AI4JI's Off-Center Fed Dipole / Windom Antenna Fan Page. Kembali ke Amrik, beberapa maniak QRP Jim Wilkie WY4R, Edgar Lambert WA4LVB dan Joe Wright. Since our return home for the U S Marines (mid-fifties) we have built more true Windoms than all the other antenna builders combined. there's the 4125 which has only the voltage balun. Be aware some versions of the Carolina Windom do not cover all bands. com including Packet Data Systems Ltd, , Anaren Ceramics Inc. For my New Carolina Windom antenna I needed a choke balun to keep RF from getting back into my radio and finding new ways to make sure I stayed awake late at night. The fundamental features of a Bazooka Balun are shown in Figure 1. 50Ω - 200Ω, 1-30MHz. 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. com in a single category. Our 7-Band antennas are OCF (off-center-fed), with a 45 foot leg and a 90 foot leg, totaling 135 feet. Here I use a windom antenna on 80 - 10 m. Doing so for the multiband Windom or off-center-fed dipole antenna (see table below), leads to a stunning revelation. 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. YF1AR yankee foxtrot one alpha romeo: THE 3 HALF WAVELENGTH OCF 4 BANDS 40-6 HF WINDOM ANTENNA. In all my years, I've never taken an antenna out of a box, or built one from a book, that has not had to be adjusted in the field. OCF Dipole - 90ft on the long side, 45ft on the short side with a 4:1 CURRENT balun at the feed point, coax to the shack. 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. FD4 (80/40/20/10 m). I purchased the Carolina Windom 80 antenna from Radio Works with the idea of using it on 80 and 40 m to supplement my SteppIR vertical, which covers the 6m-20 bands. The coax fed "Carolina Windom" OCFD types are usually tapped around the 200 ohm point where a 4:1 transformer is appropriate. 2 dB over the so-called carolina Windom. The balun is located at one third of the antenna length. Including End Fed Half Wave antennas. Some Windom-derived antennas enhance feeder radiation on purpose. Many topics are also cross-indexed. Learn new and interesting things. The Carolina Windom, however, wants the feed line to radiate (at least a portion of it) in order to gain the vertical radiation and some performance. Richard warned of significant risk of RF on the outer (inner?) braid of the coax. In the 1980's the "Carolina Windom" was developed. The feed-point of this type of antennas (off center) has an impedance of about 300 Ohms. This is the complete 40-page product manual for all of the RADIO WORKS'™ products prior to the introduction of the CAROLINA WINDOM® Compact™. 50Ω - 200Ω, 1-30MHz. 20, 15, 10m plus 17, 12, 6m Gain, low angle: 5dB Length: 10. 13% off center I feed it with 300-ohm open air-spaced feeder. 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 Off Centre Fed Dipole (OCFD) has been used for many years, the most famous being the Carolina Windom. a mast, PVC or fiberglass is preferred. Jun 8, 2019- Explore dtmooreco's board "Ham radio antenna" on Pinterest. 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. Read about Windom, Carolina Windom, or Off-Center Fed Dipole and how they work. The short answer is "yes!". My QTH consists of a Pixel amplified mag loop antenna for HF receiving. It's got voltage and current baluns inside. 2 dB over the so-called carolina Windom. Home Brew Carolina Windom 40 I have been experimenting with wire antennas since I got my technician ticket in November of 2010 and it realy took off when I passed my general in Jan of 2011. This wire and the Start of Winding 1 ( brown wire) is our connection to the unbalanced antenna. The best balun for both antennas, assuming they operated where standing waves on the feed system are low, are 4:1 baluns. Bill designed the yagi with a freeware antenna modeling program written by W3CF. The Carolina Windom, however, wants the feed line to radiate (at least a portion of it) in order to gain the vertical radiation and some performance. Carolina Windom 80m long. The CAROLINA WINDOM'S radiation pattern is an unusual combination of horizontal and vertical lobes. Een Carolina Windom (USA) is daar een voorbeeld van en deze antenne heeft verticale en horizontale stralingspatronen. The 20m Carolina Windom in the attic made contacts but electrical noise from the proximity of wiring was pretty bad. In this video from N7JFP, we see how to make a simple 1:4 HF Current Balun with 15 turns per side. LDG pioneered the automatic, wide range switched L -Tuner in 1995. Many topics are also cross-indexed. In the case of my antenna, its calculated impedance on all of the bands I want to use is more than 100 ohms, quite a lot more in many cases. 4 GHz yagi is a work in progress. One of the. My favourite Carolina 80M Windom is supported at the balun by this mast. 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. 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. The New Carolina Windom antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. This is the complete 40-page product manual for all of the RADIO WORKS'™ products prior to the introduction of the CAROLINA WINDOM® Compact™. ( you can build or buy these, they are as simple as a straight dipole, just with the feed point moved to a 1/3 - 2/3 arrangement instead of 50-50 like a dipole. Windom baluns for kilowatt range OH7SV (See an enhanced 2014 balun here)Windom balun made with Amidon ferrite toroids. -Mounted around the four corners of the roof over the apparatus bay of EMA building. That allows current on the feedline where you put a current balun in a certain spot a few feet down to create a Carolina Windom. The Balun Designs 4116ocf has been highly recommended. Antenna jenis ini popular pada tahun sekitar 70 dan 80an dan terkenal oleh kerana sifatnya yang multiband tanpa memerlukan antenna tuning unit. AI4JI's Off-Center Fed Dipole / Windom Antenna Fan Page. The result is an inverted-vertical antenna located high in the air and free of ground losses. We bought and are using the K4HEX 20-6 meter Hex Beam made and sold by NA4RR. A suitable antenna tuner will permit operation on all bands SO through 10. Specifically, a DX Engineering BAL200-H10-AT 4:1 balun. It is 17 bifilar turns on a half inch ferrite rod.