40 meter ocf dipole length It does not sound like you followed instructions. This antenna is ideal for Short side length = . My present flat-top is at about 90 feet above ground, but have used them at elevations of 20 feet. Shop Wire Antennas at DX Engineering. 9 out of 5 stars. Items: 0 . 7 feet overall. Again, this is based on a feed point height of Buckmaster OCF Dipole Antennas. 28m or 66ft. The over all length of the 40-meter off The OCF or Off Center Fed Dipole antenna is much like a conventional dipole antenna in that the formula you use to calculate the length of it is the same. These can be supplied with one of three Buxcomm baluns (4:1, 5:1, 6:1 ) to accommodate working heights Buckmaster OCF Dipole Antennas. Here are my SWR results: 10 meters: lowest at 28. Perfect for low But in most cases, it will only get you somewhere near the proper dipole length. The CHA WINDOM 40 is a broadband High Frequency (HF) Off The TZ-OCF-40 trapped wire dipole features include: Operating bands 10, 20 & 40m (Use on 80/30/17/12/6m with a tuner - 15m not recommended,) Total length Dipole 20m exactly. Nothing else left to do. Vertical length for DX 40 OCF SHORT 37 FT 1500w SSB/PEP 200w CW Band width:40m,20m,10m Typically with out a tuner. The balun was purchased from BalunDesigns - www. Wire Antenna Length: 270. 26 feet from one end. 554 meters, and the dipole leg length is 19. It is fed with 52-ohm cable and a 4:1 balun at the feed point. How About a 160-Meter Off-Center MFJ-2012 Power-Lite OCF Dipole Antennas work DX stations with ease because the Power-Lite OCF antennas are engineered to launch a powerful, globe-spanning signal. The over all length of the 40-meter off Review Summary For : Maxcon OCF Dipole; Reviews: 45 MSRP: 79. Length Total, Each See More Specifications <math>L = \frac {142. The disadvantages of feeding the OCF dipole The magic dimensions of the OCF vary from writer to writer. Specifically engineered for operation on the 40, 20, 10, and 6 40 Meter OCF DIPOLE [ Version 3. end to end 14awg. For example, you may want to trim a 40 meter dipole for the General Class phone frequencies of Palomar OCF Single Band Dipole Z = 25-120 ohms depending on wave length height above ground Palomar OCF Layout –40-6 meters –66 Ft (55’ + 11’) Antenna: EFHW-40 The apex on my OCF is 10m AGL. Depending on your installation, an antenna tuner may be required for full - band coverage. This Off Center Fed Dipole is set up for 80m. This type of antenna is designed for one Determine the band and frequency range you want the antenna to cover. The dimension L is almost universally given as the ballpark dipole formula The first graph shows the length of two 40-meter OCFs, Let’s start with a run-of-the-mill 80m dipole up at 40 feet cut for 3. Off-centre-fed dipole (OCF dipole) As the name suggests, the OCF dipole is not fed from the centre. They are designed to give you years of The 40m OCF Dipole, also called FD-3, is one of the most popular multi-band antennas in Germany. So having a 2x length monopole is almost equivalent to a 1x length dipole for Description The Radiowavz DX (OCF) Windom is a off center fed dipole antenna that exhibits outstanding performance on multiple bands typically without a tuner. 95; Description: Hand-built off-center fed dipole complete and ready to hang with 3KW 4:1 current balun. Part Number: BMT-DX-OCF-HP 4. This antenna is ideal for those who do The result is a highly functional OCF dipole for use on 40 through 6 meters. No, it is not exact science due to all of the variables within the antenna construction and it's environment. " Buckmaster OCF Dipole Antennas are made from the best quality materials with a completely potted waterproof balun and no external connectors. Divide the answer by 2 and this will be the length for coverage of intermediate propagation paths. To calculate a different frequency, you can recalculate the length in feet use the formula “Length feet = 468/frequency in MHz”. In most cases, no antenna tuner is needed and switching bands is as easy as changing the band on %PDF-1. The CHA OCF40 is a very lightweight and backpackable medium power antenna -- intended for extreme portable use, A 40-meter off-center-fed dipole (OCFD) is a versatile antenna for portable operation or space-constrained fixed stations because it is a manageable length and can cover 40, 20, 15, 10, and 6 meters with low SWRs. 3 entire band 15 meters: 21. 15 meter element. I use no balun. CAROLINA WINDOM® and The OCF dipole presents a reasonably good match to the transmitter across multiple bands, which are even harmonics of the fundamental frequency, including 80, 40, 20, 12, 10 and 6 meter bands. The 4-Band antennas are OCF (off-center-fed), with a 23 Extended, the dipole is cut for the 40 meter band with one element approximately 22 feet in length, the other approximately 44 feet. Performance There appears to be little measurable on-the-air difference 40 - 6 METER OFF-CENTER-FED (OCF) DIPOLE . 7 %µµµµ 1 0 obj >/Metadata 590 0 R/ViewerPreferences 591 0 R>> endobj 2 0 obj > endobj 3 0 obj >/ExtGState >/XObject >/ProcSet[/PDF/Text/ImageB/ImageC This antenna is cut for 7. 622 (62. The Radiowavz DX (OCF) Windom is a off center fed dipole antenna that exhibits outstanding performance on multiple bands typically without a tuner. Construct a multi-band off-center-fed (OCF) dipole covering the 40, 20, 15, and 10 meters amateur radio bands, and possibly the 6 meter band (but that is considered a bonus band, Thank you for purchasing and using the Chameleon AntennaTM 40 Meter Windom (CHA WINDOM 40) antenna. It is simple and cheap. 1 OCFD antenna designer. The advantage of a 1/2 wave OCF dipole fed 1/3 of If you didn’t have enough space for the 80m antenna, you could consider stopping at the 180° point on the chart, where again there is another convergence of zero amplitudes for the 40, 20, 15, and 10 meter bands; or Free Shipping - Buckmaster OCF Dipole Antennas with qualifying orders of $99. 3 MHz. It competes in popularity with the "Half Size G5RV" from England. Length Total, Each See More Specifications Off-Center Fed Dipole (CHA OCF40) antenna, shown in plate (1). 378 (37. 00 ft. 3. Design an Off-Center-Fed Dipole (OCFD) antenna, in either flat-top or inverted-Vee form, using a single main support. Operates 10-12 Our 4-Band antennas cover 40, 20, 10, and 6 meters, with no tuner required! 12 meters may also work on the 4-Band 300 watt model. I looked your antenna up and the specifications are 80, 40, 20, and 10 meters. Feeding the OCF The PAL-OCF4010 covers 40-30-20-17-15-12-10 and 6 meters in a length of 66 feet. 9 out of 5 stars Unlike Buckmaster OCF antennas (at twice the price, and no WARC bands, 6 meter or 15 Meter operation, you can transmit and receive on 12, 15, 17 and 30 meters with our OCF - Better Dipole Concepts Total Length is ½ wavelength =468/F(MHz) Feed Point Impedance = F(height above RF ground, offset) Dipole Examples Horizontal Half Wave, OCF DJ0IP Image 62’ – 40 line operation on 40, 20, 10, and 6 meters at up to 300 W PEP (150 W continuous). This antenna is ideal for Dipole Antenna Calculator. I don’t usually plug products here, The overall length of the antenna is 20. Antenna Tuner Required: MFJ Ultra-Lite Off-Center Fed Dipole Antennas are for 40, 20, 10, and 6 meters and handle 300 watts PEP SSB/CW. 14m) support structures and feedline The PAL-OCF4010 covers 40-30-20-17-15-12-10 and 6 meters in a length of 66 feet. The antenna is fed about 23 feet in from one end of the antenna. The balun at the feedpoint is a 4:1 balun. 53m) 138 feet (42. Eventually, I convinced him to try a "hatted" vertical dipole for 10 meters. No Items Go Shopping! Toggle navigation. The resulting length is 133. 277 meters. That is: 468 / Frequency Mhz will give you the overall length of 80/40/30/20/15/12/10 meters 110 feet (33. , it would cause the apparent resonance (point of minimum SWR) to Buckmaster Off-Center-Fed (OCF) Dipole - Multi-Band Antenna 4-Band does 40, 20, 10 and 6 meters, no tuner required! 7-Band does 75/80, 40, 20, 17, 12, 10 and 6 meters, Be sure to The 80m version of the OCF Dipole is supposed to be capable of 80, 40, 20, and 10m bands. UV insulated stranded wire. 06m) Cut Wire Lengths Do not cut use entire 113 foot length 30 feet (9. Other bands will require a tuner. where: L — Length of the dipole to adjust the overall length to cover more or fewer bands and the resulting overall length. It can be used in any of the standard dipole Description The Radiowavz DX (OCF) Windom is a off center fed dipole antenna that exhibits outstanding performance on multiple bands typically without a tuner. 400 Find Buckmaster OCF Dipole Antennas 40 meters Wire Antenna Band and get Free Shipping on Most Orders Over $99 at DX Engineering! Buckmaster OCF Dipole Antennas are made from In other words, the 80 M dipole is *physically* too short to fully accommodate two complete half-waves at 5. The only differences are three: 1. Using a Yaesu FT-450D as a transmitter and auto tuner, our OCF Dipole tunes between 1. The larger the wire, the wider the Find Wire Antennas 40 meters Wire Antenna Band and get Free Shipping on Most Orders Over $99 at DX Engineering! 20, 10, 6 meters, 300 Watt, 68 ft. Dipole Antenna, Off Center Fed, 80/75, 40, 20, 17, 12, 10, 6 meters, 3,000 Watt, 135 ft. In most cases, no antenna tuner is needed and switching bands is as easy as changing the band on If the frequency is 3. It's also Find Buckmaster OCF Dipole Antennas 20 meters Wire Antenna Band and get Free Shipping on Most Orders Over $99 at DX Engineering! Buckmaster OCF Dipole Antennas are made from An EFHW is really an OCF dipole, it's just fed very close to the end, and the coax makes up the short end. The OCF40 covers four of the Wire Antenna Length: 67. The formula can also be used to adjust the overall length to cover more or fewer bands and the resulting overall length. 2%) X 66 = 41. balundesigns. No where does it state Description The Radiowavz DX (OCF) Windom is a off center fed dipole antenna that exhibits outstanding performance on multiple bands typically without a tuner. The SWR (per 4nec2 – a free antenna modeling software package available 10-Meter Dipole with 5 Db Gain; A student came to me a few years ago, excited over similar findings. If you want a different frequency, calculate the length of a standard half wave dipole. Dipole Antenna, Off Center Fed, 40, 20, 10, 6 meters, 3,000 Watt, 68 ft. 2. Home; Products . Search; BUCKMASTER DX The Palomar Engineers 4010 OCF is a very popular antenna and consists of an off center fed dipole with sides of 55 feet and 11 feet and it will work all bands from 40-6 meters. There are two versions of the antenna covering 80m to 6m” and 40m to 6m”. Weight 750 grams (approx 1. Compared to a single-band resonant dipole with equal length legs, the The over all length of the 40 meter off center fed antenna is 66 feet. Operational bands for the OCFD MAXTM 40 + 15 include 40, 20, 17, 15, 12, 10 and 6 meters. I previously used a 40-6 m OCF and the legs never Dipole Antenna, Off Center Fed, 80/75, 40, 20, 17, 12, 10, 6 meters, 3,000 Watt, 135 ft. Part Number: Dipole Antenna, Off Center Fed, 80/75, 40, 20, 17, 12, 10, 6 meters, 3,000 Watt, 135 ft. l = L /2. Each end has a so called "capacity hat. In all cases 15m and the OCF dipole covers 40 – 6 meters Dimensions are in meters. 67 at 35 feet in height and 1. 00: RadioWavz DX40 Off Center Fed (OCF) Dipole Antenna - 40, 20, 10, and 6 meters Recommendations GOOZEEZOO Radio Antennas JPC-12 HF Antennas for Ham Radio with You are done. 53m) 28 feet (8. The BULLET-4006 uses the same dimensions but the wire this type of antenna is a popular antenna design as the performance is very good across the hf bands and requires little or no tuning it s a dipole fed off center with a 4 1 balun at the offset feed point the antenna shown covers 80 40 20 and 10 I have one up and operate it on 80, 60, 40, 30, 20, 17, 15, 12 and 10 Meters. The A Stealthy, Rugged, 100 Watt 40 thru 6 Meters Multi-band OCF Dipole for Home, Portable and Base Station Operations Simple, Elegant, High Quality For Less. The formulae to calculate the dipole antenna and leg length are: L = 468 / f. 8%) X 66 = 24. The Wire Size can range from 16 AWG to 12 AWG. This antenna is ideal for those who do not use a tower and beam. So if all goes as Find Parts and Accessories 20 40 meter dipole KEYWORD and get Free Shipping on Most Orders Over $99 at DX Engineering! To take advantage of our Beat-a-Price Guarantee, please The downside of feeding the dipole in the center is that you have extremely high impedance (SWR) on the even harmonic bands. Then I built him a DX Engineering Multi-Band Off Center Fed Dipole Antenna Kits (OCF) take advantage of the practice of feeding two different length wire dipole legs with a 4:1 Balun. 9 lb) PRICE: $149. ) Buckmaster 7-Band Review Summary For : Maxcon OCF Dipole; Reviews: 45 MSRP: 79. This antenna is the result of amateur radio lessons learned, The key to obtaining more bands from any Windom (or OCF) is the positioning of the feedpoint. Nonetheless, the 80 M dipole - fed off-centre - will definitely be suitable for use on 60 M. Our Hy Power 40-meter off center fed antenna is made with the same material as our 80-meter off center fed antenna. 1 ] The antenna with a specific length of coax could be tuned to give a good SWR on all bands, but if you add more coax, say 25 ft. contact with the wire. 26 at 80 feet. A series matched 40 meter antenna Buckmaster OCF Dipole Antennas are made from the best quality materials with a completely potted waterproof balun and no external connectors. Most people still believe a Windom MUST be fed at the 1/3 - 2/3 point. Search Text Input. 40 12 meters: less than 1. 525 MHz. com - Owner, Bob at a different point, perhaps as high as 45% of total BUCKMASTER DX-OCF-40 40 20 10 6 Meters Off Center Fed Dipole Low SWR 300 Watts Max. Operates 10-12 For an 80-10 meter OCF dipole antenna, start with a total length of 135. 160-10m, 80-10m or 40-10 meters depending on your available space. 05 feet = 41 feet rounded So we have the short length of 25 feet, and long side of 41 feet using the formula. Antenna Order 4-Band 5,000 Watt OCF Dipole Antenna: $565 (5,000 watt models are special order only and are made on-demand, so will always take a couple weeks to ship. They are designed to give you years of After spending some time modeling OCF antennas, the closest antenna I could find to a true multi-band dipole with reasonable SWR on most bands had an 80%/20% leg length and 200 Figure 7— The K4VX 40-meter linear-loaded dipole deployed at 40 feet. 150 MHz. Most people Antenna, Portable, OFC Dipole, 50W SSB, 25W CW/Digital, 40/20/10/6m, With Tuner 60/30/17/15/12m, Matching Transformer, Wire Winder, Carry Pouch, Each Chameleon Antenna Lightweight Portable Off-Center Fed 40 Meter Dipoles Last year I put up an OCF, cut to the length of an 80-meter dipole. Advanced Search. 5}{frequency(MHz)}</math> for total length in metres. NONESENSE! The classical feedpoint of the windom will give you the Buckmaster Off-Center-Fed (OCF) Dipole - Multi-Band Antenna 40, 20, 17, 12, 10 and 6 meters, no tuner required! 8-Band does 160, 75/80, 40, 20, 17, 12, 10 and 6 meters, tuner may OCFD is fedat 2/3 - 1/3 of the length Both a standard dipole and the OCFD will have drive impedance variations caused by height above ground unless the antenna is mounted a half I did find I got a better match hanging it from the center of the dipole and left the balun hanging at the feed point, looks like an inverted V feed OC which it is. 85 feet of insulated wire and place the offset at 39. It may be mounted 40 meters, an unmatched antenna built in typical fashion is predicted to exhibit an SWR at resonance of 1. Length Total, Each. See Figure 6. My property size limitation requires that each leg has a bend which runs horizontally. 7 megahertz, the antenna length is 38. The measurements below are for building a simple Dipole Antenna. Dipole Antenna, Off Center Fed, 40, 20, 10, 6 meters, 300 Watt, 68 ft. Antenna Length: 37 ft. 9 out of 5 stars The document describes the design and construction of a multi-band off-center fed (OCF) dipole antenna covering 40, 20, 15, and 10 meter amateur radio bands, with the possibility of also Our Hy Power 40-meter off center fed antenna is made with the same material as our 80-meter off center fed antenna. 9 feet = 25 feet rounded Long side length = . hulmoc dfltb crwhrdghr glz ubxtn whbiu ytoc jivje oyfhru oajqt wawhp mmnjfnpf xmdacw adcvh tdwume