Best Hf Vertical Antenna No Radials

Another key benefit the Titan provides is the ability to go virtually anywhere in the HF amateur spectrum, at anytime without having to make any adjustments. vertical is coupled to the radials and both interact strongly with ground because, at least at lower HF (<20m), the base of the vertical and radial fan will usually be only a fraction of λ o above ground. foot ground rods used for television antennas, but that is not the best solution. A vertical is so dependant on its radial system that there really is no "best. dbdx-41 no radial antenna on 75 meters, kc9mds testing this new anteena of his design. All i need now is the right antenna for the relatively small space i have?. Apparently there is no shortage of ideas about this very popular type of amateur radio antenna incorporating these concepts. I have a first hand example. Comet Antennas has released their new CHA- 250B HF vertical antenna – a straight, aluminum pipe with no parasitic elements, designed for continuous (no gaps) transmit coverage from 3. One Clean, Shiny, Strong, DX Vertical Antenna. 66 in total. Further improvements in matching can be obtained by using short radials, or counterpoise wires instead of a large earth system. 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. A quarter wavelength vertical antenna without a radial system is a pretty poor performer. Furthermore, if the return conduction current of a vertical radiator flows through salt water, losses will be lower. More than 32 radials gets you into the area of diminishing returns. Concrete or No Concrete - That is THE Question 10 Coaxial Cable to Mounting Pipe 11 Chapter 4 - Some Really Good Information Get the Best Performance From Your New Quarter-Wave Vertical Antenna 11 Some Brief Words on Ground Mounting, Elevated Mounting, and Radial Wires 12 How to Put Radial Wires Down Without Digging 13. 30 Meter Vertical Antenna. More than 32 radials gets you into the area of diminishing returns. Wire 2 is the long vertical element. This is a great low cost way of getting on HF. DROOP ANGLE The graph on the right shows the effect of an increasing angle of droop. So on a 40 meter vertical you can have a few radials that are 34 feet (ideal 1/4 wave at 7. if properly built. The most efficient of these verticals are actually vertical dipoles. Hello, Currently without any HF antenna and after seeing my friend's success with his homebuilt vertical, I'm starting to consider a self-supported. A single loop can cover several bands over a 2 or 3 : 1 frequency range. Select a site as close to the sea as possible, ideally surrounded by water (Kingman Reef would seem ideal!) and use a vertical (0. One Clean, Shiny, Strong, DX Vertical Antenna. Is there such a thing as a good HF no radial multiband vertical? I've used the Cushcraft series of verticals with "counterpoise" radials at the bottom, short (couple of feet) wires that are at the bottom of the antenna near the feedline. 5m vertical wire antenna (supported on a 10m fishing pole) fed against 10 buried radials, and terminated with differing values of resistive loads. Frequency under HF is called medium frequency or MF. Experimental measurements and calculations show that with this number, the loss resistance decreases the antenna efficiency. Once again, we'll look at an 80m vertical at 3. The Titan is the ONLY antenna marketed with total continuous coverage under 2:1 on 10m 12m 15m 17m 20m 30m 40m and 100 KHz on 80m. Click the button below to add the Jetstream JTV680 - 6m thru 80m No-Tune / No-Radials Vertical Base Antenna to your wish list. The DX Flagpole Antenna is an HOA approved, NO Radial, Stealth vertical antenna. It will probably take several trips from your shack out to the antenna and back shortening or lengthening the elements. THE VERTICAL DIPOLE. Vertical Antenna & Mast Kit $165. You may find. In fact, a vertical dipole can work quite well. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. Although more efficient than a tripod mounted vertical, short loaded dipoles suffer from the fact that they have a very narrow bandwidth, and so need constant retuning. Nice shiney aluminum standing tall, and that's it. The Butternut HF9V Vertical as a Ham Radio ALE Antenna. I fondly call it my 24 foot dummy load. 6 pounds, makes it very manageable during the installation process and will allow for a simple mast solution. Brown, "Ground Systems as a Factor in Antenna. Some radiation angles are more desirable than others. Marine Vertical Installation with Radials Having installed my old Shakespeare Marine vertical a while ago as a ground-mounted vertical, today was radial laying day. Buy GPA-80 HF Vertical 80-6M No Gaps No Radials & Perfect SWR With ATU at Amazon UK. Ground Mounted Vertical Antenna Notes for 7MHz and below * Correctly configured ground mounted vertical antennas for 7MHz and below will out perform horizontal antennas for DX work. You Recently Viewed Jetstream JTV680 - 6m thru 80m No-Tune / No-Radials Vertical Base Antenna. If you're cramped for space and looking for the finest in a self supporting vertical, here's an antenna designed with you in mind. The real usefulness of the quarter wave grounded vertical or Marconi antenna is the ability to halve required antenna lengths. G8JNJ Broadband HF Vertical Antenna - Requires no tuner - copied by many companies. The Titan is the ONLY antenna marketed with total continuous coverage under 2:1 on 10m 12m 15m 17m 20m 30m 40m and 100 KHz on 80m. I have been using a GAP Challenger DX, (review here), for the past fifteen years, unbeknownst to me, and over that time, water had been slowly seeping into the tuning harness of the antenna. I will look into a half sloper again (have been using it many years ago on 160m with reasonable results). Vertical antennas are very popular for HF operation because they fit in well to a small garden. My choices are basically a J pole or a flowerpot. Mariotti –Heavy Duty Multi Band Vertical Antenna –CQ. also see Verticals and Baluns page, and longwire page. The proper way to set up a trap vertical, is to tune each trap for low SWR , starting on the highest freq and working your way down in Mhz, and up to the top of the antenna. The DX Flagpole Antenna is an HOA approved, NO Radial, Stealth vertical antenna. HF SSB Antenna Small 35ft garden Hi i'm new to amateur radio and have recently purchased a Yaesu FT-950 plus power supply and SWR meter. ANTENNA BASICS FOR BEGINNERS VERTICALS and Full-Size Vertical with 32 radials Top Fed Antennas -No Radials 80 m model of. To keep things simple, use non-conductive guy lines. They were asked to choose their ";favourite portable antenna" from: Ground-plane W3EDP Endfed Halfwave Single Band Dipole Random Length Endfed Doublet Linked Dipole Magnetic Loop Multiband Loaded Dipole Other The order the antennas were listed in was. This is the best antenna if you want to travel with your radio. You mention that elevated verticals using no radials will work but not great. HF/6M Ground-Plane Vertical Broadband vertical antenna with no ground radials is super. I'm wanting to purchase a multiband vertical HF antenna and I only want to do it once and do it right. Interfacing the antenna The 43 foot vertical is NOT resonant on any of the HF ham bands. • Any HF vertical mounted a few to many feet above ground with only a few radials suffers virtually the same ground losses as a ground mounted vertical with a few radials. Vertical antennas are very popular for HF operation because they fit in well to a small garden. In figure 1 we have depicted a quarter wave vertical antenna with drooping radials which would be about 45 degrees from horizontal. To see how FT8 will perform. 6 MHz, but now assume that the vertical element is the right size, about 68 ft. A single loop can cover several bands over a 2 or 3 : 1 frequency range. This is the story of how I constructed the ground mount for it. jetstream jtv680, jtv-680, 6-80 meter vertical, no radials required. This small but solid guide walks the reader through the design and installation of inexpensive, yet effective short HF vertical antennas. Some might say that vertical antennas should be on this list as well but I find them to be more complex to install properly and therefore are not, in my estimation, the best first antenna for a new HF operator. 5:1), and reception from 1 to at least 90 MHz (claimed VSWR 3:1 at 150 MHz). The real trick is to avoid design or installation errors. DIAMOND BB7V Multi Band Vertical Antenna A couple of videos from Waters and Stanton looking at the Diamond BB7V Vertical Antenna for 2-30Mhz. So my question is this: I have a shop building with a 50 x 70 foot metal roof, would that be a good place to mount a vertical HF antenna and use the metal roof as the ground radial system. What's the best antenna? If there were just one "best" antenna, everybody would use it. Vertical antennas that have grounded radials are not cheap to build if you want one that is efficient and has a low Take-Off angle. For full functionality of this site it is necessary to enable JavaScript. I have a Butternut Vertical (as a secondary antenna) and a regular radial system set up with it. 6 MHz, but now assume that the vertical element is the right size, about 68 ft. Made out of aluminum tubing Uses PVC as an insulator Is 32 feet high. Subscribe to comments with RSS or TrackBack to 'HF Vertical Antenna Considerations'. Another advantage is that it can be placed where there is no good ground or at the edge of your lawn so you can cut your grass without thinking of radials on ground. The real trick is to avoid design or installation errors. A magnetic loop could work but it may be unwieldy. As you might. This time I want to extend the "no growth" zone to well past the edge of the radial plate. The radials contribute to the radiation efficiency of the entire vertical antenna system. They're ground-independent, half-wave vertical antennas so there are no radials or RF-ground ever needed! MFJ-2286. 75 inches O. So my question is this: I have a shop building with a 50 x 70 foot metal roof, would that be a good place to mount a vertical HF antenna and use the metal roof as the ground radial system. Vertical Antenna Ground Systems At HF Rudy Severns N6LF Introduction A key factor in determining the radiation efficiency of verticals is the power loss in the soil around 1 the antenna. Page 6 The extra radials help overcome unknown poor-soil conditions, improve bandwidth, and ® ensure the best performance efficiency possible from the Butternut HF6V antenna. Mariotti -Heavy Duty Multi Band Vertical Antenna -CQ. I'm wanting to purchase a multiband vertical HF antenna and I only want to do it once and do it right. Hello, Currently without any HF antenna and after seeing my friend's success with his homebuilt vertical, I'm starting to consider a self-supported. For a while I used antennas for other bands with a tuner to get on 30. Enter your pictures. So how does a traditional vertical antenna. 75 inches O. Now radio amateurs can take full advantage of the versatility that a tuner used in conjunction with a multiband HF vertical antenna can give them. HF Antennas for HF beginners – 30 Meters and Below 5 Take the time to get the resonance exactly right. Enter the desired frequency. One common orientation is vertical. Take this into consideration, when deciding whether or not to purchase a trap vertical. * A good ground plane is essential for a vertical to perform well. Although more efficient than a tripod mounted vertical, short loaded dipoles suffer from the fact that they have a very narrow bandwidth, and so need constant retuning. There are usually four radials, three being a minimum, but you could use up to six. These tuned lengths are an important concept in the proper operation of a ground-mounted vertical antenna. These have the advantages of needing no radials, no special matching at the feedpoint, and they typically have about 5 degrees lower takeoff angle than the quarterwave vertical. Higher performance, HF Multiband DX Flagpole Antenna covering 3. Type: No Radial Vertical : Description: Hy-Gain's new AV-640 Patriot HF vertical is the best built, best performing and best priced multiband vertical available today. 0:1 VSWR mismatch at full power for typical operating intervals. Vertical HF multiband antenna V8 - 9A4ZZ Introduction While constructing different antenna types (very short antennas, 9A4ZZ BIPOLE antenna-my original solution and different versions of it, versions of EH antenna, my solution EMA antenna…). However, an improvement of the ground system below ANY antenna (except maybe a Beverage antenna) will help its overall performance. MR6060 SuperWire Radial Set For HF Vertical Antennas 60m 5MHz Band Ham Radio MP1 See more like this Super Antenna Mr8075 Superwire Radial Set 80M-75Meter For Hf Vertical Antennas 3 Brand New. With a vertical antenna system, the radials are the second half of the antenna. This newcomer's antenna was a bit mistrusted at first, against all other vertical aluminium on the premises. I had an email from a radio amateur who was struggling to work DX after putting up a very off centre fed dipole cut for 40m and fed with open wire feeder. Get the feedpoint up about 17 feet and use it as a vertical dipole. Your friend will just have to either find a Spanish retailer or find a. NewSuperAntenna is the Official Super Antenna Systems Corporation website. So my question is this: I have a shop building with a 50 x 70 foot metal roof, would that be a good place to mount a vertical HF antenna and use the metal roof as the ground radial system. Effect of the paired radials. com Free Ham Radio Classified Ads from QTH. I used it as a reflector for my home brew HDTV antenna, with stunning success I might add. Just had too much better results with horizontal'ish antennas. Just setup the Tri-Pod and attach the three antennas via the QUICK connects with bayonet fittings. Another advantage is that it can be placed where there is no good ground or at the edge of your lawn so you can cut your grass without thinking of radials on ground. the Best HF Antennas (so far!) Before I start advise others on good and better antennas it's time to show you what kind of antennas I use at this moment. In figure 1 we have depicted a quarter wave vertical antenna with drooping radials which would be about 45 degrees from horizontal. 6m vertical fed with a 4:1 Un-Un (unbalanced to unbalanced transformer) as described by IV3SBE. Actually it's worked out quite well, working WAS on FT8 and quite a bit of DX on FT8, JT65, PSK & CW. So don't own one, a friend does and for what is worth he claims it is the best vertical he has ever owned over 30 years including, Butternut, Cushcraft, Hustler, Hy-Gain, etc But the steppir's are pricey $595 and $695 Good luck CL. Although multiband operation is certainly possible with an antenna "tuner", this particular design works best on the band of your choice. In this post, we show you how to find the right end fed hf antenna along with our top-rated reviews. The SE HF X-80 is an end fed aluminium vertical antenna, capable of allowing the user to work 80 metres through 6 metres bands using an ATU, also not requiring any counterpoise and can be fed using coax cable. Best end fed hf antenna. Brown, "Ground Systems as a Factor in Antenna. 43 ft verticals have become a popular antenna, and while they have some strong points, they present a very high SWR on most bands, so they require a serious tuner. It is designed so that you feed the vertical antenna with this choke and connect your coax on the end to run to your shack. These antennas may be ground mounted with or without radials or elevated mount with radials. No piece is longer than about 20-inches so it will fit into most suitcases, yet the fully assembled antenna has a length of almost 16-feet! Photo "Author & Package" shows the disassembled antenna with guys and radials. Thir efficiency is somewhat lower than for larger antennas, but no ground system is needed and the antenna does not have to be very high off the ground. or Best Offer. Maximum-Gain Radial Ground Systems for Vertical Antennas Al Christman, K3LC Table I Optimum number and length of radials for a vertical antenna on 40 meters (7. My choices are basically a J pole or a flowerpot. I have also used the antenna with an L-network tuner on 75, 40, and 20 meters with delightful results stateside. don't remember) foot long ground rods already installed right below where this antenna would mount. 5 to 50MHz with NO radials sound like relief for your CC&R and HOA restrictions? Yes, it's true! We double-checked, twice! Our 20-foot vertical-dipole performs with confidence! Folks, those of you in restricted areas can enjoy a. Yes, it is possible to design a vertical antenna that doesn’t use radials. 5m vertical. The antenna can be ground mounted or attached to an insulated pole, which will further improve the HF performance (as shown later). July 19, 2014September 17, 2014 Vertical Delta Loops 3131 Conclusion Vertical Delta Loops are good performers, cheap, simple, portable and one more option to get on the air ANTENNA Pros Cons Vertical Delta Loop Portable Very large on low bands Dipoles No Radials Need altitude for DX Monopole Good on low Bands Many radials required. 6m vertical fed with a 4:1 Un-Un (unbalanced to unbalanced transformer) as described by IV3SBE. Those items included two toroid cores salvaged from a defunct computer PS. DIAMOND BB7V Multi Band Vertical Antenna A couple of videos from Waters and Stanton looking at the Diamond BB7V Vertical Antenna for 2-30Mhz. For many amateur radio operators, a vertical antenna may be the only option they have to put up an HF antenna. With that said, go look up the cost of one that is being sold in the magazines and on the web. I've read that laying your radials out in the spring, across the lawn, means that the grass will grow up and gradually bury them under the grass thatch. HF Antennas for HF beginners – 30 Meters and Below 5 Take the time to get the resonance exactly right. chameleon HF hf antenna mpas 2. This is the story of how I constructed the ground mount for it. Insulate and Isolate All Earth Paths. Experimental measurements and calculations show that with this number, the loss resistance decreases the antenna efficiency. Another name of it is 'decameter wave' or 'decameter band' since its wavelength ranges from 1to 10 decameters. The graph below shows the measured VSWR of a 6. ) – Other (longwires. Experimental measurements and calculations show that with this number, the loss resistance decreases the antenna efficiency. This newcomer's antenna was a bit mistrusted at first, against all other vertical aluminium on the premises. If there is little, or no ground system, then the antenna will vary in load and effectiveness, or may not work at all! Design of a 20 Meter Top Loaded Vertical. I had an email from a radio amateur who was struggling to work DX after putting up a very off centre fed dipole cut for 40m and fed with open wire feeder. When used as a radio frequency (RF) radiator, the non-tapered antenna element provides the widest practical bandwidth coupled with a low wind resistance. Your ground radial system is the most important part of vertical antenna performance. The choke makes it so that your coax cable doesn’t turn into a radial thereby feeding back RF into the shield of the coax. >> Could you recommend me a HF vertical multiband antenna >> (80,40,20,10 or more bands) which doesn't require >> radials? > > Is there a commercial HF vertical available in > Spain that doesn't require radials? There are lots of "no-radial" verticals on the market. 5 on entire bandwidth. Just had too much better results with horizontal'ish antennas. In fact, a vertical dipole can work quite well. Harris - Stack tri band J-pole QST 1980 Suffers the same problem of 2 mt section radiating at UHF. At first glance, it is pleasing to the eye. Once again, the base of the antenna will be 10 ft above an average ground. QRPGuys Portable Tri-Band Vertical Antenna. 6 Band Vertical HF Fixed Station 10, 15, 20, 30, 40, and 75 or 80 Meters. 5-57 MHz (claimed voltage standing wave ratio less than 1. Any vertical without ground radials is only half an antenna. The SWR is good les than 1. Type: No Radial Vertical : Description: Hy-Gain's new AV-640 Patriot HF vertical is the best built, best performing and best priced multiband vertical available today. Ham Radio ANTENNA SE HF-X80 VERTICAL RADIAL FREE ANTENNA 80 TO 6 METRES or Best Offer; Save 80 meter vertical antenna to get e-mail alerts and updates on your. I decided to compare a ground mounted Hy-Gain AV-12 AVQ, Triband HF vertical for 10M, 15M & 20M to my loop and dipole antennas. ALL BAND MULTIBAND - 13-Band HF VHF Vertical antenna Ham Radio Amateur - $356. Marine Vertical Installation with Radials Having installed my old Shakespeare Marine vertical a while ago as a ground-mounted vertical, today was radial laying day. Furthermore, if the return conduction current of a vertical radiator flows through salt water, losses will be lower. The VHF/UHF vertical dualband antenna paired with a multiband horizontal wire dipole is a cost-efficient, easy-to-erect combination providing FM simplex and repeater ops for local communications as well as long-distance HF skip on. Hello John, of course I'm no expert in vertical antennas. and no degradation of performance at 2 meters and 70cm? Review of the Literature J. No big ugly radials anywhere from head to toe. Just had too much better results with horizontal'ish antennas. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. Butternut HF9V Vertical as a Ham Radio ALE Antenna Benefits to the ham radio ALE operator: No tuner needed. There are three rules of antenna installation: 1) Any antenna is better than no antenna. NewSuperAntenna is the Official Super Antenna Systems Corporation website. Choosing a Backup Generator Plus 3 LEGAL House Connection Options - Transfer Switch and More - Duration: 12:39. That's why several antenna manufacturers developed verticals that do not use radials at all. particular vertical antenna works like a bomb with no radials at all, (b) that another doesn't need any radials because it's a "half-wave" tall on one or another band and remotely tuned, another (c) that THEIR antenna can get by with a greatly abbreviated radial system because its feedpoint is a few feet above ground, and our favorite (d) is. long radiating element can be wound on the pcb for easy storage. Manufacturer of Wireless Accessories - Apparatus - Networks - Digital - Voice Transmission - Reception - Voice - Image - Data Communication Apparatus - CW SSB FT All Modes - HF Portable - Mobile - Telephone. That gave me 8 radials, as 40 Meters was the lowest frequency band I had any real interest in, I made them all 1/4 wave long on 40. chameleon HF hf antenna mpas 2. of each radial, have a length of about six inches. The “standard” vertical for HF work is a ¼ wave vertical. Freight Item. This newcomer's antenna was a bit mistrusted at first, against all other vertical aluminium on the premises. All Bands Vertical Antenna-HF (homebrew) A few months ago my friend 9W2 AYR(Anuar) and I visited my new friend 9M2LR (Mr. 6:1 continuously from 3. Nice shiney aluminum standing tall, and that’s it. Once again, the base of the antenna will be 10 ft above an average ground. Radials are critical to the performance of any vertical. Is there such a thing as a good HF no radial multiband vertical? I've used the Cushcraft series of verticals with "counterpoise" radials at the bottom, short (couple of feet) wires that are at the bottom of the antenna near the feedline. MR6060 SuperWire Radial Set For HF Vertical Antennas 60m 5MHz Band Ham Radio MP1 See more like this Super Antenna Mr8075 Superwire Radial Set 80M-75Meter For Hf Vertical Antennas 3 Brand New. To keep things simple, use non-conductive guy lines. In fact, a vertical dipole can work quite well. 0 silver bullet 1000 vertical antenna wolf river coil About Michael Martens A licensed amateur radio operator since 1999 and earning his Extra Class license in 2002, Michael is the Owner of KB9VBR antennas and regularly writes his blog on antennas, emergency communication, amateur radio technology, and operating. Nice shiney aluminum standing tall, and that's it. 80 Meter Tower Vertical with Short Radials Now that some other tasks are out of the way and the weather is sufficiently cool that traffic has declined in my backyard, it is time to get to work on my new antenna for 80 meters. But unless the antenna in question is a vertical dipole, you still need a pathway for the RF currents to return to the antenna. Forgoing the need for a tuner (which is arguably not too big a deal) let’s have a look at the predicted patterns using NEC. " A mediocre antenna coupled with a good radial field will outplay a highly efficent antenna over a poor radial system. Bailey Line Road 97,153 views. Experiment 1 - Vertical Attached to Ground Rod with No Radials. Being down a couple S units only really matters when signals are weak. However, an improvement of the ground system below ANY antenna (except maybe a Beverage antenna) will help its overall performance. For 15m we have tried several types of vertical antennas, the last 2 years we used a J-pole antenna. the antenna is 41 feet of radiator on top of a 75 foot tower, it is totaly isolated from the tower, where bill kc9mds found a way to operate this antenna without the need of radials. 6 Band Vertical HF Fixed Station 10, 15, 20, 30, 40, and 75 or 80 Meters. Additionally, a metal support is often connected to the J-pole antenna, adding a third variable. NewSuperAntenna is the Official Super Antenna Systems Corporation website. Simple and Fun Antennas for Hams. At HF low take off angles provide long distance skywave communications, while below this there is the ground wave for non directional beacons and AM radio broadcasting. Another name of it is 'decameter wave' or 'decameter band' since its wavelength ranges from 1to 10 decameters. I have a Butternut Vertical (as a secondary antenna) and a regular radial system set up with it. A 66' vertical is one of the best size compromises you can buy for the lower HF frequencies, period! As with all our antennas, this antenna is built to last. Finally, the directivity of a vertical HF antenna can be effectively employed at the reception end to cancel out high-angle interference caused by near-by stations. For some antennas, the antenna is simply not complete without a radial system, or at least a counterpoise. Maximum-Gain Radial Ground Systems for Vertical Antennas Al Christman, K3LC Table I Optimum number and length of radials for a vertical antenna on 40 meters (7. Hustler 6BTV - New Radials HF radio conditions have been pretty grim on an evening back in the shack lately so I decided to try and optimize my Hustler 6 Band Trap Vertical in the hope that I may get a bit more of a helping hand on the 40 meter band. I have also used the antenna with an L-network tuner on 75, 40, and 20 meters with delightful results stateside. Solid one inch fiberglass trap forms for optimum electrical and mechanical stability. SHARE and SHOW your Antenna Ground Radials to the WORLD!. As I consider it a temporary antenna, elevated radials would make removal very easy. <= Back to Dayton New Products Hy-Gain 80-6 Meter Patriot Vertical Antenna AV-680, $549. I hate to 'rain on the parade', but I don't have much 'faith' in any vertical antenna. Figure 3: Comparative EZNEC elevation patterns and gains of (red) shortened no-radial 40 meter ½λ vertical and (black) ¼λ ground plane antenna with 4 full-sized radials. These have the advantages of needing no radials, no special matching at the feedpoint, and they typically have about 5 degrees lower takeoff angle than the quarterwave vertical. A magnetic loop could work but it may be unwieldy. It is a quarter wave vertical radiator and four radials that simulate a ground for the radiator. also see Verticals and Baluns page, and longwire page. Shop with confidence. There are two types, those that are best installed at ground level and those that can be installed on top of a mast. By John Portune W6NBC. The pattern (right) is what you get on 20m. Most hams put far too few radials under their vertical antenna to have it perform the way verticals do. Super wide bandwidth means more time operating and less time stuck on a frequency your trap vertical is tuned for. 75 inches O. Hustler 6BTV - New Radials HF radio conditions have been pretty grim on an evening back in the shack lately so I decided to try and optimize my Hustler 6 Band Trap Vertical in the hope that I may get a bit more of a helping hand on the 40 meter band. - Uses elevated radials for higher gain. That is a whole lot of wire. Wire 2 is the long vertical element. 00! Wow! These guys are making some good markup! Features of the K0WA 40 meter verticle. The Near Vertical Incident Skywave (NVIS) antenna is a half-wave dipole antenna mounted not over 1/8th wave above ground (at the highest operating frequency). dbdx-41 no radial antenna on 75 meters, kc9mds testing this new anteena of his design. When used as a radio frequency (RF) radiator, the non-tapered antenna element provides the widest practical bandwidth coupled with a low wind resistance. The design of this antenna is so simple it is almost stupid. Unless you're willing to put a lot more work into them than I am, they just are not 'miracle' workers in any sense. Modeling this 160 meter inverted-L in EZNEC shows surprisingly useful patterns and gain on most HF bands above 160. 0:1 VSWR mismatch at full power for typical operating intervals. 9% similar) By purchasing from this listing, you are agreeing to the following: On-line store brand new see our other listings for hard-to-find plasti dip products, rf connectors and adapters plus a full-line of amateur radio accessories too. Other antenna arrays do no need to be grounded either as they already use elements 1/2l long, straight or folded. So my question is this: I have a shop building with a 50 x 70 foot metal roof, would that be a good place to mount a vertical HF antenna and use the metal roof as the ground radial system. Click on any photo to zoom. I hate to 'rain on the parade', but I don't have much 'faith' in any vertical antenna. A single loop can cover several bands over a 2 or 3 : 1 frequency range. My current antenna is a 75m dipole and 20m vertical dipole on one coax with no balun, it works fine on all bands with autotuner. On 60 & 80 you would need an external ATU. - Portable Vertical Antenna for 75m and 40m makes up a compact 28 feet high antenna. The antennas are available with a 50 ohm coaxial input, a 600. without radials and requires the use of a tuner. Roelof Active Whip located about 36 feet AGL. 6:1 continuously from 3. Super Antenna MR1710 SuperWire Radial Set for HF Vertical Antennas 17m 15m 12m 1 Get The Power Of A SuperWire Stealth Radial Set. Catch up instantly on the best stories happening as they unfold. I had an email from a radio amateur who was struggling to work DX after putting up a very off centre fed dipole cut for 40m and fed with open wire feeder. The “standard” vertical for HF work is a ¼ wave vertical. i'm always impressed with simple dipoles and always resort to throwing them up. No big ugly radials anywhere from head to toe. The CP-6S is a 6 band vertical antenna for HF and 6m. 0:1 VSWR bandwidth,it can sustain a 3. r&l electronics: no radials required jtv-680 multi band hf base antenna :. Ham Radio ANTENNA SE HF-X80 VERTICAL RADIAL FREE ANTENNA 80 TO 6 METRES or Best Offer; Save 80 meter vertical antenna to get e-mail alerts and updates on your. 0:1 across all bands. I knew my 20 meter vertical was a keeper, especially when there was no trouble in getting a very low SWR reading. It is possible that you could have done a much better job if you understood the theory of how a buried radial antenna works. NVIS / HF Combo Antennas. I'm wanting to purchase a multiband vertical HF antenna and I only want to do it once and do it right. I carried out a survey in early 2014 to try to discover which portable HF antenna was most popular. To see how FT8 will perform. and no degradation of performance at 2 meters and 70cm? Review of the Literature J. This is a great low cost way of getting on HF. The ground around a vertical monopole type antenna can be viewed as strings of series connected resistors fanning out from the base. I also tested a 50Ohm load connected across the primary of the 4:1 Unun with no tuner, and just a 50 Ohm load connected between the vertical feed point and ground radials with no Unun or tuner. HF Antennas 101 l A good antenna may be the most important component of a good HF station - 1W QRP station + good antenna can be heard worldwide - 1KW station + bad antenna can warm the shack in winter l Major antenna types - Vertical ¼wave monopole - Horizontal ½wave dipole - Beam/Gain (Yagis, quads, etc. For 15m we have tried several types of vertical antennas, the last 2 years we used a J-pole antenna. By following a few simple guidelines, you can obtain excellent performance from vertical antennas mounted on the ground or elevated above the ground. The real trick is to avoid design or installation errors. But unless the antenna in question is a vertical dipole, you still need a pathway for the RF currents to return to the antenna. Comet Antennas has released their new CHA- 250B HF vertical antenna – a straight, aluminum pipe with no parasitic elements, designed for continuous (no gaps) transmit coverage from 3. I hate to 'rain on the parade', but I don't have much 'faith' in any vertical antenna. Notice that there are no discussions about the performance, impedance, or any other vertical antenna technical details. Feed point and Balun This was the first test and no balun was available… Of course the antenna needs a real 1:1 balun/choke to isolate the antenna from the coax cable. About Hustler 5BTV or 6BTV: roof w/radials or ground? The resource is currently listed in dxzone. The Comet CHA-250B is a broadband vertical with NO GROUND RADIALS. 00! Wow! These guys are making some good markup! Features of the K0WA 40 meter verticle. Bailey Line Road 97,153 views. 6:1 continuously from 3. When done this way it is a compact antenna to take along. Learn More. Since I was lucky enough to have someone give me lots of aluminum stock, I decide to try my hand at building a mock up of a 80/40 meter version of a butternut antenna. ARRL, Newington, CT, 06111. I'm wanting to purchase a multiband vertical HF antenna and I only want to do it once and do it right. Yes, even if you bury it deep and install three of them. See photos "Author & Vertical", and "Front Yard" for pictures of the fully assembled vertical. The Near Vertical Incident Skywave (NVIS) antenna is a half-wave dipole antenna mounted not over 1/8th wave above ground (at the highest operating frequency). Modeling this 160 meter inverted-L in EZNEC shows surprisingly useful patterns and gain on most HF bands above 160. The antenna will handle 200W PEP or 50W CW HF or 150W CW/FM VHF and UHF.