Ocf Antenna Performance

7-Band OCF Antennas Our 7-Band antennas cover 80, 40, 20, 17, 12, 10, and 6 meters, with no tuner required! Wire antennas are a great simple way to work 40M and 80M rather than a noisy vertical antenna that requires horizontal radials. Do you think this setup will improve the antenna's performance?. Performance has been excellent as promised on each band. OCF-4010E-3K OCF antenna (Windom) This is OCF dipole wire antenna also known as Windom antenna fed at 19% from one end. The performance is very good across the HF bands and requires little or no tuning. Just Bands Covered purchase a CAROLINA WINDOM® and you have the ultimate in performance from antennas in this class. With the superior performance found in the IC-718 such as wide dvnamic range, high C/N ratio, and full duty operation you will find making these contacts easy. New Icom Ic-706mk2g For Auto Antenna Tuner At-180 Free Shipping Ems From Japan. Yes, you would use a 4:1 current balun when feeding an OCF Dipole with 50 ohm RG-8X. Off topic a bit, but over the years it seems there has been a bias towards the DX performance of antennas (nohing wrong with that) while local/regional coverage antennas seem to have red headed step child status. Note: It is not imperative to feed the OCF antenna at the point shown. We're talking about "reasonable" heights on a given band as discussed in the antenna literature. Loss in the balun is very small and tuner losses are covered by other programs. The RadioWavz DX-160 (OCF) Windom is ideal for those of you who do not use a tower and beam. The AC30011 antenna is designed for close integration with 4G cellular antennas in telematics units to avoid coupling between antennas. —If your final output. This version of the antenna provides excellent performance at 1. The End Wire Size can range from 16 AWG to 12 AWG. It will work 80-6 meters with the built in tuners found in most radios today. Whether the long wire antenna is a single wire running in one direction or is formed into a 'v'. Lowest price on ocf dipole antenna in the United States. Here are some typical OCF dipoles that are successful designs 160-6 meter OCF antenna layout (using a double tuned stub for better 20 and 40 meter performance) Here is the 160-6 meter SWR graph using 200 feet of RG213 feed line and an average height above ground of 35 feet: 80-10 meter OCF antenna layout […]. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. UV insulated stranded wire. 850-329-8783 6 Band hexagonal beam antenna covering 6, 10, 12, 15, 17, and 20 meter bands shipped to your door for only $570($520 + $50 shipping) The NA4RR Hexagonal Beam (commonly referred to as the hex beam) is a popular antenna based on the G3TXQ design. com in a single category. I am sharing here the thought process and experimentation that I went through to arrive at the solution that best fits my needs. 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. Our Greyline Performance upgrades to the DX Flagpole Antenna involve minimizing losses, finding every. Antenna hight: 25ft. I'm using it to demonstrate the resonance of the Windom on different bands. Sounds complicated, but it really isn't. Mobile applications set the focus for the initial requirements in the design of the Scorpion Antennas. Diy Tv Antenna Antenna Gain Ham Radio Antenna Wifi Antenna Radios Arduino Hf Radio Hams Morse Code What exactly is antenna gain, and what do those numbers mean to me? I'll take a non mathematical look at antenna gain and how it relates to performance. It is complete, cut, tuned, and ready to hang. Getting a Big DX Signal on 160-10 m from One Small, Low Antenna Chuck Counselman, W1HIS I live on a small lot in a dense, inner suburb of Boston and Cambridge. Part of the issue with attic antennas are they are in fairly close proximity to house wiring, gutters, and such. 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. Combine the Double Zepp's performance with the added gain of the CAROLINA WINDOM's Vertical Radiator system and you can see why many operators, including one magazine columnist, report performance comparable to small Yagis. help Mounts on most metal vehicle surfaces and has rubber feet to prevent scratching; Low profile, small size and approximately 23-feet of cable allows the antenna to be placed almost anywhere on the vehicle to ensure optimal signal reception; Compatible with all radios and docks that work on the Sirius and XM networks with push on style, single input antenna connector; Includes NGVA3 Magnetic. Like everything else, antennas come in many forms and flavors. If the 80m OCF is fed with a 4:1 balun it produces a capable and flexible antenna which will cover all HF except 30m and some of 15m at better than 3:1 SWR, it is also a capable, though not ideal, antenna on 6m. Collapsible: Antennas that slide or folds within the radio unit's case. Bundle W 23a Psu, Auto-tuner, Desk Mic. Standing Wave Ratio: Actual performance obtained is variable from one build to another, and from one installation to. Antenna hight: 25 ft. The performance and SWR with this antenna will measure differently between installing it close to the ground, up in the air, and near metallic objects. Beasley Antenna & Satellite Inc. he frequency bandwidths demanded by high-definition television have considerable range…” With these prescient words, Philip. Current type 4:1 (200:50 Ohms) BALUN is another product designed for OCF antennas (Off Center Fed) also known as Windom antenna. Only my OCF antenna in my SOTA pack has a balun, all the others don’t and adding a balun adds weight, so IMHO it’s good to avoid it if you can. It also works fine on all bands above 40m with a tuner, and even below 40m on 60m, and 80m, although the coax losses will be higher. My antennas have a low noise floor and a beautiful omnidirectional radiation pattern. It has gain and wave angle comparable to a full-sized ¼λ ground plane antenna with radials. In this picture, the mount is holding up a 5' length of PVC to get the antenna up above any obstructions. 150MHz, so this is the frequency we will stick with to build our 40 meter Bazooka. The OCF dipole is a multi-band wire antenna that does not use traps and is relatively simple install. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on all bands. Beasley Antenna & Satellite Inc. I bought it to go with a folded dipole from DX Engineering. Two wires, each a quarter wavelength long, connected to a coaxial cable feedline in the middle. The antenna works on the bands as advertised with low SWR. Grounding is key to good reception If I connect the shield of my coax (which is grounded outside) to the antenna input of my R8, I hear lots of junk, indicating. 7-Band does 7580, 40, 20, 17, 12. Made from heavy 1/8th wall aluminum tubing,not the cheap 16 gauge tubing offered by others. The main category is OCF Antennas that is about Off-center-Fed dipole Antennas. Double Bazooka NVIS Antenna Calculator. Note: It is not imperative to feed the OCF antenna at the point shown. The measurements below are for building a Double Bazooka Near Vertical Incident Skywave (NVIS) Antenna. The antenna can be mounted as a dipole or inverted vee. I've had quite a bit of success working DX with the antenna. Whether needing an HOA Antenna or a very low loss, high-performance DX vertical dipole for all bands, our OCF antenna line does it. There is a sequence to the "feed system" that is required for higher performance. I live in a HOA neighborhood so the antenna has to go in the attic. antenna 6 to 10 feet off the ground will ever work particularly well. I also used 300/f(MHz) to calculate wavelength. HF Antennas Compared Using WSPR By Mike Perks ZS6BIM Comparing the performance of HF antennas … Continue reading → Installing my TBR 160 on my Butternut January 10, 2012. I am a fan of the OCF dipole, but not of the Windom, which is a completely different type of antenna. The RadioWavz DX (OCF) Windom is ideal for those of you who do not use a tower and beam. After raising the antenna, let the coax hang straight down, the one-piece SO-239 connector is plenty strong enough to support it. Established in 2005, Balun Designs builds exceptional quality baluns and ununs for Amateur Radio, military and commercial applications. 7layers has been a member of this activity group for several months and finally demonstrated compliance to the new RF specifications by testing several appropriate reference devices. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on all bands. Performance has been excellent as promised on each band. Without Radials. I found out quickly when starting out in the mid '80s that a vertical did not let me work Kansas Slow Speed CW net on 80m very well. This antenna spans a tuning range spanning 3. 300 Ohm Twin Lead with the ends shorted is an option for even greater bandwidth. ó , kdyh kdg \rxu pxowledqg hqg ihg dqwhqqd lqvwdoohg khuh lq 6lqjdsruh iru d ihz zhhnv qrz dqg dp yhu\ sohdvhg , xvhg wkh zluh iurp p\ suhylrxv dqwhqqd zklfk lv ihhw orqj ,w zrunv ehdxwlixoo\ , kdyh lw. db we can out of the antenna heights we offer and enhancing take-off angles too. John Portune. Made to handle the elements Used by DX contesters all over the world (OCF) Dipole Antenna - 40, 20, 10, and 6. EFHW-8010-2K 2000W Multi-Band End Fed Half Wave Antenna. The standard OCF dipole is in the CW portion of the band. Quality and performance quite good. 1,2 Here is why: Placing the feed point away from the center, increases the resistive part of the feed impedance and feeder load more than the reactive (imaginary) part of the resonant antenna, which is nearly resonant. The antenna was described in QST and a commercial version was available at time of writing. This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. The RadioWavz DX (OCF) Windom is ideal for those of you who do not use a tower and beam. G7FEK Limited Space Antenna G7FEK Multi-band “Nested Marconi” Antenna - 2008 Version (rev 5) This antenna was first conceived as a simple dual band antenna in 1988, in an attempt to achieve sensible dual band operation in a small garden of 14m (46 ft) length. OCF Dipole - This is a popular antenna design as the performance is very good across the HF bands and requires little or no tuning. My first impression was so-so, but as I use it more and more, I am increasingly pleased with the performance. My Top Five Backyard Multi-Band Wire HF Antennas L. I have found the easiest single antenna to utilize is the OCF - it is coax fed, making easy routing of the feedline. 1,2 This soft-ware allows you to design and optimize an antenna that exactly fits your situation and pocketbook. 5 inch PVC spreaders on the 20 meter band. In one Navassa DX'pedition, of the 33,000 QSOs made, more than 27,000 were accomplished with this antenna. Our Vertical Dipole OCF Antennas (Off Center Fed) are an improvement from the various “best sellers” we see on the market. The earth ground is not an effective ground for transmission purposes, so you literally have only half of an antenna. The entire antenna needs to clear of anything close by as well! I'm not saying that it won't work the other way - but performance has been greatly diminished. antenna height. Don't let H. Hanging at correct height, the Double Bazooka is the ideal DX antenna supporting capacity up to 4kW. The antenna input impedance varies widely vs frequency from one band to another. You've changed the shape of the antenna away from a dipole, so it will have a different radiation pattern than a dipole. 160m, 80m, 40m, 20m,10m It's also ideal for those who want a high performance antenna with world class DX coverage. Requires antenna tuner. Hy Power Antenna Company, OCF Antennas. for the 160 Meter Band. Antenna hight: 25 ft. Your configuration should work and not be affected by the slight L shape. Feeding the OCF dipole at a point that is one-third of its. The OCF-3K80 dipole will work well on the 80 40 ,20, 17,12 and 6 meter ham bands without an antenna tuner. EAntenna 160OCF3 OCF WINDOM 160m 3kW. crucial to the overall performance of the antenna. Nashua Area Radio Society › Topics In All Forums › Elmering Forum › OCF Dipole Help This topic contains 12 replies, has 3 voices, and was last updated by Fred Kemmerer 1 year, 11 months ago. 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. 5oz) shows only very modest losses (< 1dB on 40m, < 2dB on 10m). This antenna was built with the same quality workmanship and attention to detail as our military, government and commercial wire antenna products. com **Also, feel free to provide any info you like: such as DX worked, performance, and your opinion of the antenna!**. balun was appropriate to each antenna. One issue that many RVers stress over is how to attach external Wi-Fi and cellular antennas to their RVs. text fıle. Additionally these antennas are considerably less sensitive to static charge. Super wide bandwidth means more time operating ,and less time stuck on a frequency your trap vertical is tuned for. The reason this antenna is inefficient and not recommended is because there is no RF ground or counterpoise. December 5, 2002 at. My antenna is hanging from 5 trees, with the antenna wire being attached to a dipole center insulator and balun at one tree. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on all bands. You can take away but it is structuraly weaker to "add on". This includes any object (especially metal) that would potentially block a signal from reaching the antenna. Alpha Delta antennas use a hybrid approach which has both parallel dipoles and coils instead of traps. —If your final output. In proof of its performance, an EZNEC-calculated VSWR-graph of the CL-OCFD antenna is presented in Figure 2. OCF antennas work fine. AI4JI's Off-Center Fed Dipole / Windom Antenna Fan Page. For how to build information, construction details and material sources for this project, see my article: Building Dipole or Wire Antennas. We're talking about "reasonable" heights on a given band as discussed in the antenna literature. Designed as a 20m antenna. Loren Windom, W8GZ, was first to reveal the antenna to the radio amateur community by describing the antenna in the September 1929 issue of QST. Antenna Supermarket Antennas Miracle Antennas RadioMaster Antennas RF Systems antennas. heights of 7. Test/Site Conditions for our Quarter Wave Sloper vs Inverted-V Dipole Because of the above stated variables we wanted to test these antennas over the. Its free-space antenna-terminal impedance at 3. How does the DXV OCF Antenna compare to other well-known antennas such as the Hy-gain AV-680 and Cushcraft R9: *The Red inner rings are 80M, blue 40M, green 20M, and orange 10M. • Solves and identifies radar performance problems on the ground verses in-flight. One issue that many RVers stress over is how to attach external Wi-Fi and cellular antennas to their RVs. The OCF-3K80 is complete with a 4 to 1 -- 3000 Watt continuous duty Balun. It's also ideal for those who want a high performance antenna with world class DX coverage. The antennas were separated vertically in the center by a 24" Plexiglas Lexan spreader, feed at the bottom with a DX Engineering DXE-BAL050-H05-A Balun. My antenna is hanging from 5 trees, with the antenna wire being attached to a dipole center insulator and balun at one tree. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. For the most part, these comparisons are absolutely valid and well meaning. My antennas have a low noise floor and a beautiful omnidirectional radiation pattern. The 4-band Fritzel model FD4 is a special version of a Windom antenna. Thinking of another dipole, will use Tensioner. heights of 7. The integration. antenna height. BEST PRACTICES FOR OCFD ANTENNAS: Always mount your OCFD as high as possible to minimize the potential for CMC problems. Modelling results. Want to read more about. The antenna input impedance varies widely vs frequency from one band to another. WA8NLX 2 30-100 packages horizontal 2 65’ Windoms Fed with LMR-400. Upon checking the antenna with my antenna analyzer I found the SWR across all bands to be very low. Designed for limited spaced applications and ruggedly built for many years of service. Great Tensioner and antenna combo. Current type 4:1 (200:50 Ohms) BALUN is another product designed for OCF antennas (Off Center Fed) also known as Windom antenna. First, the concepts of OCF games are presented, and then, several algorithmic aspects are studied for two main classes of OCF games. At the new house I have a smaller lot with a better layout for getting two wire antennas erected. Sounds complicated, but it really isn't. By John Portune W6NBC. The antenna is strong, lightweight and computer designed not only for the basic electrical performance, but also computer designed for mechanical strength, durability and low profile. Delta Loop Antenna. Nashua Area Radio Society › Topics In All Forums › Elmering Forum › OCF Dipole Help This topic contains 12 replies, has 3 voices, and was last updated by Fred Kemmerer 1 year, 11 months ago. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on multiple bands typically without a tuner. G5RV – 102 ft. They are designed to give you years of trouble-free service! Find Buckmaster OCF Dipole Antennas DX-OCF-HP160 and get Free Standard Shipping on orders over $99 at DX Engineering!. Antenna 160OCF3 OCF WINDOM 160m 3kW. Made to handle the elements; Used by DX contesters all over the world. As seen in Figure 2-3, an RF filter is sometimes inserted between the antenna and the LNA to further notch out interferers. We have built a couple of your "Walton County" specials. The antenna is ideal for local communications within 1000-2000 km of your location or for DX depending on how high the antenna is mounted and in what configuration. It was a experiment into compact multi-band HF aerials for the higher bands and various solutions existed: G3TXQ Hexbeam , GM3VLB Delta , G3TPW CobWebb, Moxon , VK2ABQ etc. Upon checking the antenna with my antenna analyzer I found the SWR across all bands to be very low. Un dipôle, conçu pour la bande de 80m, qu'il soit asymétrique ou symétrique, est souvent installé à une faible hauteur, au-dessus du sol, par rapport à sa longueur d'onde fondamentale. Background. Thanks for being our customer. The following discontinued shortwave antenna brands may still be available online and in flea markets. There are no complicated wires or losssy coils to deal with. 40 - 6 METER OFF-CENTER-FED DIPOL OCF ANTENNA. Buckmaster OCF Dipole Antennas are made from the best quality materials with a completely potted waterproof balun and no external connectors. The TZ-OCF-40 is one of the most simple yet effective multi-frequency antennas. Using Amidon cores (in particular TXXX-2 and -6) the losses are relatively low and the performance of the antenna is better, but in the lower bands you may need a antenna tuner to obtain good SWR. Application: • Absorbing collars (shrouds) around the edges of high performance antennas • MM-wave applications • Small test boxes Physical Properties : OCF Standard colour White Base size (cm) 61X61 Max. G5RV – 102 ft. Jks Jeep Wrangler Jk 07-11 Front Fox Coilovers W Dsc And Bracket Kit 2-2. Jeff , VE1ZAC This is not a new idea, but the method I am suggesting of doing it is novel, and possibly simple to implement ! The caveat is that it is fussy and unique to each antenna situation. The performance is very good across the HF bands and requires little or no tuning. The antenna does not use any traps. W4BSG Single 20-50 hoizontal 66’ 40m OCF fed with ladder line Yes Just looped over tree top by myself at age 87. Figure 5 shows the azimuth pattern. Fritzel FD4 OCF Dipole Fritzel FD4 OCF Dipole The Frizel FD4 Windom is an OCF (Off Centre Fed) antenna that has been around for a long time. 1,2 This soft-ware allows you to design and optimize an antenna that exactly fits your situation and pocketbook. Radio 80 Ham Radio Antenna Radio Band Dipole Antenna All Band. If you follow Stan's guidelines, you can design, build, and use a random loop antenna with minimum expense and maximum pleasure. You’ll also find differences in complexity and efficiency. The design of this Field Day Antenna is not very novel and leverages ideas from Butternut verticals and ARRL publications. A design process might also involve a list of bands and antenna performance requirements, with a selection from '1. During the PACC 2013 I used this antenna for 160 meters. I'm looking for a multi-band HF antenna for my new RIG coming (Kenwood TS-590S), specifically I am looking at the buckmaster OCF Dipole 4 band or 7 band antenna, but here is the issue. Modelling results. This link is listed in our web site directory since Monday Oct 19 2015, and till today "OCF Dipole" has been followed for a total of 2143 times. US is the exclusive distributor and online shop for USA & CANADA. 20 ’ DX Vertical   Antenna, an OCF vertical dipole for  all band HF radio operation. filters or antenna. The antenna wire had a length of 84 ft (25. The antenna comes with a 3′ coaxial cable to attach the antenna BNC output to a SO-259/PL-259 input of your receiver (most receivers). Antenna Supermarket Antennas Miracle Antennas RadioMaster Antennas RF Systems antennas. I'm thinking about attaching 3-30' counterpoise wires on the bottom of my 9. The design has been pre-tested and optimised for integration into an OBD-II form factor, which allows fast time-to-market for new designs without the need for an extensive and iterative tuning process for the antenna. Welcome to Mosley-Electronics. I'm thinking about attaching 3-30' counterpoise wires on the bottom of my 9. I am sure going to build this 20m vertical dipole. (Gives predictable performance). Bundle | 20' DXV + LDG RT-100 | No Radials OCF Antenna All Bands 80-6M – DX Flagpole Antenna See more. restrictions keep you off the air!. My first antenna was a 2m 5/8 vertical antenna (homemade). Antenna hight: 25 ft. Part 2: Performance Rating: 3 out of 5 Dealing with Greyline Performance requires a bit of faith in mankind and patience. The RadioWavz DX (OCF) Windom is ideal for those of you who do not use a tower and beam. Lately there's been a few forum threads, blog posts, and video comments, reportedly comparing the performance differences between a magnetic loop antenna and dipole antenna in various deployment scenarios. Overall I'm very pleased with the results obtained, and would not hesitate to build another OCF dipole antenna in the future. your operating habits, budget, antenna-size limitations and available supports. It's a dipole, fed 14% off center with a 4:1 voltage balun. What others are saying This is the LDG and the DXV non-flag vertical dipole HF Radio Antenna for A LDG remote tuner and an all band, low loss, high-performance radio antenna that gets you on the air with DX Confidence. com 2004 marks my fifth full decade as a licensed radio amateur. The CHA SKYLOOP is an extreme performance horizontal full-wave loop antenna. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on all bands. 20 ’ DX Vertical   Antenna, an OCF vertical dipole for  all band HF radio operation. Typically no tuner is required for 40, 20, 17, 12, lower 10, and lower 6 Meter bands. Jks Jeep Wrangler Jk 07-11 Front Fox Coilovers W Dsc And Bracket Kit 2-2. With the middle at 30 feet and the ends at 10 feet the 7-Band antenna requires about 120 feet of ground space. Review (mpn: 4116ocf for sale) 4116OCF 4/1 Hybrid Balun Bullet Proof Ocf Antennas Designs 1-54 Mhz 3kw. crucial to the overall performance of the antenna. The antenna could be scaled for other bands. Application: • Absorbing collars (shrouds) around the edges of high performance antennas • MM-wave applications • Small test boxes Physical Properties : OCF Standard colour White Base size (cm) 61X61 Max. To achieve this, the LoRa Alliance has been active in developing a new RF antenna performance test specification in addition to the LoRa core specification. The antenna was described in QST and a commercial version was available at time of writing. Mobile operators need an antenna that will perform in all the different orientations a vehicle may operate, the highly interactive variable RF environment, and of course survive those “bird strikes”. The entire antenna needs to clear of anything close by as well! I'm not saying that it won't work the other way - but performance has been greatly diminished. Our antennas work great in Mobile, Home and Portable settings. of the OCF in a variety of benchmarks, measuring over- all system performance. Antennas designed for a fixed or stationary application such as a base station antenna or a satellite's Earth station antenna. Any coaxial cable should be run down to ground and a lightning arrester should be added. The antenna is strong, lightweight and computer designed not only for the basic electrical performance, but also computer designed for mechanical strength, durability and low profile. They are designed to give you years of trouble-free service! Find Buckmaster OCF Dipole Antennas DX-OCF-HP160 and get Free Standard Shipping on orders over $99 at DX Engineering!. This link is listed in our web site directory since Monday Oct 19 2015, and till today "OCF Dipole" has been followed for a total of 2143 times. Another alternative is the off-center fed dipole (OCF). The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on multiple bands typically with out a tuner. A commercial antenna system, the Buckmaster 7-band OCF Dipole, exploits this property. Antenna hight: 25 ft. text fıle. The OCF-3K80 dipole will work well on the 80, 40 ,20, 17,12, and 10 meter ham bands with no need for tuning. If you listen to the DX activity on the Low bands, you'd be forgiven for thinking that you're wasting your time unless you have a 4 Square Array, 20 acres of Beverage antennae, a huge Amplifier, and a neck like an anvil. With these issues noted, it appears to work alright. 5 ft multiband Off-Center-Fed (OCF) style dipole antenna that covers the 80 thru 6 Meters Amateur Radio bands, most without an antenna tuner. I am impressed with the performance but to be honest with you my 40 meter Inverted-V sometimes does better but then again sometimes it does not. Performance. Expect to try many different noise antennas before you find one that works for your installation. In general, homebrew dipoles provide surprising performance for the dollar. The antenna performs best at the most critical orientation—directly overhead in an antenna radiation pattern where overall signal strength and the potential for unwanted interference is the largest and most likely to occur during SATCOM events—and maintains high performance over wide angles of incidence encountered by in the field by mobile. The TechnoRV Suction Cup Mount is ideal for mounting on the top edge of a slideout - making it easy to run the antenna cable indoors. In order to have maximum reception, don’t mount the antenna in or near storage areas in attic. Overall I'm very pleased with the results obtained, and would not hesitate to build another OCF dipole antenna in the future. end to end 14awg. Performance was better that I expected!!! Even worked on 80m and 160m at reduced power. Radio Wavz 80m DX(OCF)Windom 136ft. OCF Dipole - This is a popular antenna design as the performance is very good across the HF bands and requires little or no tuning. The application of the EFH (End Fed Half wave)antenna in the Amateur radio area is an optimum product for single band operation. The OCF Spiral Dipole can be matched with a small tuner. 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. I trust they are still performing well. Th radials can be touching. Whether the long wire antenna is a single wire running in one direction or is formed into a 'v'. This program computes dipole feedpoint impedance, feedline input impedance, balun input impedance, and antenna and feedline losses. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on multiple bands typically without a tuner. At the fundamental frequency of an OCF antenna, performance is thus at best similar to that of a center-fed 1/2 wavelength dipole and at worst about that of an inverted Vee. performance evaluation. Hello all, The HF-Auto arrives tomorrow. For an inexpensive, low profile, high performance antenna the dipole antenna simply can't be beat. Over the last few months I have been playing with WSPR and I wanted to be able to use it as a rough way to evaluate the relative performance of different antennas. Requires antenna tuner. Delta Loop Antenna. Alpha Delta antennas use a hybrid approach which has both parallel dipoles and coils instead of traps. This manual is common for all four C-3S models. With 200 watts of continuous key down CW it would heat up the core of the W2AU balun, at the feed point,and damage it, but that is the extreme example. However performance on the HF bands was not as good as the G5RV or Carolina Windom / OCFD antenna. 160m, 80m, 40m, 20m,10m It's also ideal for those who want a high performance antenna with world class DX coverage. I bought it to go with a folded dipole from DX Engineering. Rick Sagers (W7YC) and David McAnally (WD5M) have been working on an Offset Center Fed (OCF) Dipole antenna project the past few weeks. The TZ-OCF-80 is an Off Center Fed wire antenna designed to permit operation on the 80m, 40m, 20m and 10m amateur bands. The indoor shortwave antenna is a compromise when you cannot install an outdoor antenna. We offer a wide line of antennas including Amateur, Aviation, Business, Citizens Band (CB), Commercial, Marine, Military, & Short Wave antennas. (Gives predictable performance). help Mounts on most metal vehicle surfaces and has rubber feet to prevent scratching; Low profile, small size and approximately 23-feet of cable allows the antenna to be placed almost anywhere on the vehicle to ensure optimal signal reception; Compatible with all radios and docks that work on the Sirius and XM networks with push on style, single input antenna connector; Includes NGVA3 Magnetic. The bandwidth of each antenna design on each amateur band can be evaluated, to compare the performance across each band. I am sure going to build this 20m vertical dipole. I am a fan of the OCF dipole, but not of the Windom, which is a completely different type of antenna. Strictly speaking, the only reason to use an OCF is to be able to match the antenna on several bands using coax. The integration. In order to have maximum reception, don’t mount the antenna in or near storage areas in attic. For the past couple of weeks, I've been playing with end-fed wire antennas. It would not be an Aerial-51 antenna without 15 meters! ----- PERFORMANCE: Like the 404-UL, the 807-L has what it takes to be a great performer. Think of the "Carolina" windom antenna (the modern version of the windom) as an "upside down vertical antenna", hanging down from its counterpoise strung (more or less horizontally) some 10 meters (or more) above ground. Steve Nichols G0KYA Contents 1. Want to read more about. Order 7-Band 100 Watt QRP (low power) OCF Dipole. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on all bands. OCF antennas. Nashua Area Radio Society › Topics In All Forums › Elmering Forum › OCF Dipole Help This topic contains 12 replies, has 3 voices, and was last updated by Fred Kemmerer 1 year, 11 months ago. An OCF dipole produces a radiation pattern very similar to that of a center-fed dipole on its fundamental frequency, and a very nice pattern with lots of gain on its second harmonic frequency. I'm thinking about attaching 3-30' counterpoise wires on the bottom of my 9. What others are saying This is the LDG and the DXV non-flag vertical dipole HF Radio Antenna for A LDG remote tuner and an all band, low loss, high-performance radio antenna that gets you on the air with DX Confidence. • Radar is boresighted then conducts performance checks against surveyed key structures. The TZ-OCF-80 is an Off Center Fed wire antenna designed to permit operation on the 80m, 40m, 20m and 10m amateur bands. The OCF short vertical dipole for HF has become popular, particularly disguised as a flag pole for low impact installations and encouraged by claims of outstanding performance. My goal was to test how well two different antennas that I made for field use compare to my base station antenna. It was by Windom's name that the antenna became known. Presenting Center 7 in stock here online. Antenna height will affect the exact resonance point, radiation pattern, and takeoff angle. Easy to install and tune. ) In all cases it is "better" to have an antenna slightly longer than slightly shorter. Antenna hight: 25ft. Whether the long wire antenna is a single wire running in one direction or is formed into a 'v'. We have built a couple of your "Walton County" specials. The RadioWavz DX (OCF) Windom is ideal for those of you who do not use a tower and beam. I trust they are still performing well. This article describes how I built a multiband OCF antenna, including the actual dimensions, measurements, and some performance information. Divide the this number by your design frequency. My first impression was so-so, but as I use it more and more, I am increasingly pleased with the performance. This program computes dipole feedpoint impedance, feedline input impedance, balun input impedance, and antenna and feedline losses. I am sharing here the thought process and experimentation that I went through to arrive at the solution that best fits my needs. Service Temperature 90°C. The LL runs perpendicular to the Dipole for 50' and slightly off-perpendicular (as much as 15 feet) for the remaining 50-70'.