Carolina windom vs ocf dipole



carolina windom vs ocf dipole I settled on the “New” Carolina Windom design by K4IWL. Charles Wittnam: Antenna: 1: September 17th 03 07:49 AM: Off Center Fed Dipole: Windom HSQ: Charles Wittnam: Antenna: 8: September 2nd 03 01:25 AM OCF Dipole - This is a popular antenna design as the performance is very good across the HF bands and requires little or no tuning. 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. It's a grounded vertical wire connected to a horizontal portion acting as a top hat capacitance. This antenna has become quite popular, as the performance is exceptional. 6 dBi at 70' up, with an elevation angle of maximum radiation of 27 degrees above the flat, uncluttered terrain assumed by NEC programs. Alpha Delta is now selling an almost exact duplicate of the original Fritzel antenna. The Windom antenna is an off-center fed dipole with an unbalanced coax feedline. w/RG -213 dipole Yes Good product…thanks. 4. May 09, 2000 · All-Band HF Antenna - SGC vs G5RV vs Carolina Windom vs ?? 2. OCF Dipoles - About windom antennas and OCF Feb 19, 2020 · Off Center Fed Dipole (OCF) Antenna. Since the dipole is typically a half-wave antenna, it can be impractical on small lots. 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 10 meter v factor dipole 10 meter tech class dipole! centered on 28. For the average 'take it out of the package and hang it up'. I will be using an LDG AT100Pro II automatic tuner. It will work 80-10 with the built in tuners found in most radios today. In 1937, the Windom was first described as a compromise multiband antenna. A conventional center fed dipole has the lowest feed point impedance at the center, 50-75 ohms depending on height above ground. For best results, your pole or mast should not be of metal. The Carolina Windom antennas are all very heavy antennas, which makes it difficult, and expensive to install them at decent heights. All are good antennas. Coax fed OCF ‘Windom’ antenna. In my opinion, the great. 0 dBd Used during several Field Days, but needs 35 feet of height; 80-meter operations require a tuner By careful design of the antenna, the Carolina Windom has resonant points in the 40M, 20M and 10M amateur bands. For an 80-10 meter OCF dipole antenna, divide the ½ wavelength standard of 468 by the lowest operating frequency of 3. If you choose a 200 Ohm feed point you would use a 4:1 balun, but it's just as easy to select a 300 Ohm or 450 Ohm feed point. The short end was placed at about 40 feet off the ground, tied to a tree limb, using about 10 feet of insulated rope. Mar 22, 2012 · Excel Worksheet for Building Any 1/2 Wave Dipole (Center-Fed, OCF, Windom, New Carolina Windom) October 23rd, 2011 | Author: Todd NØIP Here is a spreadsheet I designed in Microsoft Excel for calculating the first cut and the final cut (after testing) of a 1/2 wave dipole, whether center-fed, classic off-center-fed, Windom, or New Carolina Windom. The 4-band Fritzel model FD4 is a special version of a Windom antenna. Thinking of another dipole, will use Tensioner. 8% from one end. 7576m Conocida como "La 14%", "OCD", "OCF" ( por off-center-dipole, u off center feed ) o simplemente Windom, es una antena con muchas variaciones, a veces discutida, pero con particularidades y simpleza que para quienes no la han experimentado, vale la pena tener en cuenta. G5RV vs. A center-fed half-wavelength wire antenna cut for 7. 2002 - 2021 i1wqrlinkradio. Tried most of the stuff you mention. OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center with a 4:1 OCF Current balun with built in feed line choke, Store Product Categories Sep 24, 2020 · There are even variations of the dipole that can cover multiple bands, like trap dipoles, parallel dipoles and off-center-fed (OCF) dipoles. It will operate on 80, 30, and 17 meters but requires a tuner. KM4HPN 30-100 package horizontal Radio Works Carolina Windom Compact 80 No pulley used Great Tensioner and antenna combo. Nov 07, 2012 · Some 'Carolina Windom' makers claim to take advantage of the inherent unbalance in the antenna to use part of the feedline as a vertical radiator. I want to build an off-center fed dipole for 80 meters and up. 95 Normally $179. Interesting to study in the Internet: windom, carolina windom, ocf dipole, double windom, balun. Over in the United States, interest in the archaic Windom antenna was again revived, lead by the 1978 article in Ham Radio Magazine written by John Nagle, K4KJ (SK) [2]. Want I am looking for a used Carolina Carolina Windom-160. Very pleased with units. One is called The Carolina Windom and another is called the Buckmaster OCF Dipole. 333 feet long. June 18, 2020 No comments. Theory and construction of a novel trapless center-loaded off-center-fed (cl-ocf) dipole or windom antenna for the 80, 40, 30, 20, 15 and 10m hf amateur radio bands New Carolina windom antenna PDF file by QRP Expressions by By N. But since that is a trade mark name, W8AMZ (SK) could not use it. Jerry, K4SAV W4ZW wrote: > >I decided to try a OCF (Off Centerfed Dipole) dipole for the 160M contest >this weekend rather than trying to put up the extended double bazooka I >normally use. The normal Windom is described as having a 1/3 length leg, and a 2/3 length leg. CAROLINA WINDOM® 80: List Price $199. It was a 40 meter Carolina windom. Nov 25, 2015 · The W8AMZ OCF Dipole / Windom dimensions are as follows: 80-6m OCF / Windom: 132’ long. On 10m, an 80m version will have 8 gain lobes and 8 lossy nulls. Bought a classic Windom in 1997, worked pretty well and was stealthy. Carolina Windom ??? Deane Charlson: Antenna: 11: November 5th 03 08:50 PM: Off Center Fed Dipole: the "Windom" experience. In other words an 80-meter Windom 137 feet long would have one leg 45. antenna to greater heights than a heavy antenna. :/. "MULTI-BAND" is one of the Windom's (OCF's) biggest attractions. Later generation of the Windom are more correctly called off-center-fed dipoles (or in abbreviated form, OCF dipole antennas). Windom 40. 4 meters ) leg, totaling 135 feet or 41 meters setup as T Top . The Carolina Windom Antenna - the 160m-10m Special version by Radio Works. Jul 16, 2014 · A 40 meter OCFD is 66' overall length, same as a 40 m center fed dipole. De onderste beugel zit 4m agl, dus de top zit dan nog op 12m agl, ruim 3 meter boven de nok van het dak. The term off-center-fed (OCF) dipole is preferred. See full list on onallbands. I sold the Fritzel FD-4 80 to 10 OCF dipole in the mid 90's and used one with good results. These are basically similar but vary in small details. 18λ from one end providing a 500 ohms match. What this really is, is an Offset Center Fed Dipole, or OCFD. The Carolina Windom is essentially an off-center fed dipole (OCFD) that uses a portion of its feed line as a vertical radiator. The big difference is in the balun that you use to feed the antenna. Some people might take issue with using the word "dipole" because the antenna has more than two opposing polarities along the length, but in my opinion it is perfectly fine. Now, how was a Windom antenna developed? It began with a center-fed, half-wave dipole. After spending some It therefore made sense to have an OCF antenna. A 40M OCF WORKS ON JUST 3 BANDS: 40/20/10m. Some thoughts on the popular Carolina Windom antenna. Oct 15, 2015 · With 256 feet of wire, a Flat-top or Inverted-V are about the only support options available. T. 14 = 13. A 30 meter parallel element is not Simply put, the CAROLINA WINDOM® is a high available because there was too much interaction Apr 10, 2011 · 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. Additionally, the so called Carolina Windom employs both a 4:1 balun where the matching stub meets the horizontal elements, and also a 1:1 current This is about the OCFD and not a Windom, Carolina Windom, or End-Fed Zepp. Alpha Delta calls it an OCF antenna and it is made by Buckmaster Antennas. So from a mechanical standpoint the CAROLINA WINDOM® and that should be understood meters to be an important band, so this version of the to avoid possible disappoint with the Off-Center-Fed RADIO WORKS’ OCFD MAX™ features a parallel dipole. The Carolina usually needs an antenna tuner, since the 4:1 balun doesn't provide as good a match to coax as the 6:1 in the Buckmaster (who also makes the same antenna sold by Alpha-Delta). Feed the balun with a 10′ length of 50-ohm coax (this is the “vertical I have many antennas to compare to, Mosely TA53M Beam, Hygain TH11DX Beam, 80 M dipole, Carolina Windom 160, a 300 foot horizontal loop, and now the OCF Dipole from Array Solutions. 19 may 2011. > (probably better) with the 135' ladder line fed dipole. Oct 23, 2005 · If you played with nearly every OCF type of antenna, surely you have to come across a Carolina Windom before. 43 meter) yang masih Carolina Windom 80m long. I wanted to make a all band antenna without the long tail of a G5RV. All the power goes up to thefeedpoint with coax and very little comes back because we will CHOKEit ! For this design we look at a resonant dipole for the lowest band desired and feed it off center with a balun. Overall Length 66′ Overall Length 41. Fritz Spillenger (SK), a German ham, call sign DJ2KY. AN 80M OCF WORKS ON JUST 4 BANDS: 80/40/20/10m. on each of the ends dropped; supposedly gets lower angles of radiation. Summary The Carolina Windoms work just like a dipole or normal OCF-dipole. Daxton Elise. I think when you add the vertical radiator, it becomes a Carolina Windom™. 6 MHz, take 468 / 3. Connect these two elements to a 4:1 current voltage balun*. The open copper-clad wire will corrode eventually along it's entire length. 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 The "Carolina" windom thus becomes a near-omnidirectional antenna. Specification. On the other hand, an OCF dipole is an ungrounded dipole antenna fed with twin-conductor line, either coaxial or open wire parallel conductors. This is the length of a standard dipole but instead of dividing the result in half, use a 36/64% offset to determine the feedpoint. Hi Darin, Been there, done that. Perlu dipahami terlebih dahulu, bahwa Antenna Windom didesain tujuannya adalah untuk mendapatkan sebuah antenna multiband, sehingga performansi dimasing-masing band tidaklah terlalu penting, justru coverage di beberapa band dengan satu buah antenna dan satu buah feeder itu yang paling diperhitungkan. David, If you can believe the 'Window' part of either antenna, not needing a 'matching system' should be easy to handle. Bands: 40M, 20M, 10M (without ATU) 30M, 17M, 15M, 12M (with ATU) Power: 200W Max. 2. First impression is the quality… very well made with quality components. The horizontal wires are black jacketed #14 Gauge Stranded Copper wire that is easy to work with, unlike the bare solid 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. As an inverted V , with the middle at (10 meters) 30 feet high and the ends at ( 3 meters ) 10 feet the 7-Band antenna requires about 120 feet 37 meters of ground space. " Oct 15, 2014 · The OCF dipole differs from the Carolina Windom for the same reasons it differs from a G5RV. Sep 30, 2020 · • W8AMZ Carolina Windom 5-band (80-40-20-10-6) OCF dipole ($87, see reviews) SO-239 / 132 ft / 1500 W, 0. >I have used the Carolina Windom and found no magic there. Yes it uses a 4:1 balun at the top, but if you read what I wrote, the 1:1 balun is used to stop feedline radiation from entering the shack at a specific point on the feedline due to radiation from having two unequal dipole elements. 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. 44′ on the long side & 22′ on the short side. Len Carlson, K4IWL Smithe Windom Six Band HF Windom antenna OCF Dipole vs. The OCF is prone to common mode problems. Sep 06, 2011 · Off-Center Fed Dipole / Windom Antenna. 70 m (L2/L=32%) The OCF dipole can work (with balun 4:1 or balun 6:1 and tuner) on 7, 14, 28 MHz. The objective being to find an impedance on the antenna that can provide a reasonably good match to the transmitter across multiple The Carolina Windom (OCF dipole) places a balun at the feedpoint and another inline balun at 1/4wl down the coax assuming a wavelength of 10m. Aug 17, 2021 · Carolina Windom antenna. The comment about keeping the dipole and adding a tuner is a good one too. carolina windom vs ocf dipole

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