Best Hf Vertical Antenna No Radials







After talking with a number of 160M vertical antenna gurus, I've collected some great info that may interest some. My last vertical antenna experience relevant to the Hex Array came from the MFJ-1792 antenna. The first antenna I placed up in the 120' x 40' yard was a portable vertical that I use on the Appalachian Trail. High Performance 40 Meters Vertical. Best Sellers. But note that you still need a radial field under any quarter-wavelength-long vertical antenna that is ground-mounted, no matter what the sales pitch says. The coax needs to come away from the vertical at roughly 45° to minimize the coupling to the lower antenna wire. For best performance, it’s desirable to use antennas that have the same polarization. Radiation straight up is to be minimized. This means radials. The winding serves as a 1/4 wavelength vertical and can be used with a suitable ground radio/counterpoise system and antenna "tuner" for the HF band of choice. There are usually four radials, three being a minimum, but you could use up to six. Ok, it tipped over but no harm done. The antenna is easy to install but does not resonate on amateur bands as described without the use of radials. Also for: 6-btv, 5-btv. 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. 24 AWG magnet wire, it uses the 3⁄ 8 inch to 1¼ inch aluminum tubing of the HF vertical. The 4-BTV is designed as a self-supporting vertical to provide optimum operation in the 10,15, 20 and 40 meter bands. I fondly call it my 24 foot dummy load. The addition of the VHF+ antenna to a conventional vertical antenna made from aluminum tubing causes some shift in electrical length of the vertical at HF, but otherwise it functions in these two regions as fairly independent antennas, and with. I used heavy copper braid for the radials and used two radials tuned for each band of operation. Page 121 of MFJ new 2013 ham catalog Hy-Gain’s PATRIOT HF vertical antennas are the best built, best performing and best priced multiband verticals on the market today. SHARE and SHOW your Antenna Ground Radials to the WORLD!. Being down a couple S units only really matters when signals are weak. A vertical HF antenna can get away with a height of only λ/4. First I would like to remind you once again, that there is no Magic or Ideal antenna. Multiband HF Vertical Antennas. I did not operate with the antenna, I just erected to see what comments I would get from neighbors. CP6AR Diamond Antenna instructions, reviews, free download files, and much more. At first glance, it is pleasing to the eye. One vendor says to use 150 feet of RG-213 for best all-band operation of the 43-foot antenna (so you can tune from the tuner in your shack). A radial field enhances the ability of the ground around the vertical to conduct RF energy. HF vertical with an end fed wire Best DX with the ‘vertical’ overall. If you can mount your HF antenna well above ground level, only four wires for the groundplane work as well as many wires at ground level (like the VHF/UHF antenna above). The vertical dipole has a very small foot print and requires no radials, 3. The No-Radial Vertical. Re: Best vertical HF antenna Post by mangina » 23 Mar 2013, 18:04 Yep a doublet is also a great antenna and can be made very cheap even with open wire feeder as this is easy to make and is not critical in the spacing of the wires. This vertical should be mounted at 6 to 8 feet above ground for best performance. 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. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. The DX Flagpole Antenna is an HOA approved, NO Radial, Stealth vertical antenna system. 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. I'd always suspected that getting an HF vertical above surrounding clutter was a for best soil Low angle If no radials, antenna will use the. Incidentally, Dan Horvat, N4EXA/E73M, the owner of MyAntennas was an antenna designer for Cushcraft. They're ground-independent, half-wave vertical antennas so there are no radials or RF-ground ever needed! MFJ-2286. For full functionality of this site it is necessary to enable JavaScript. I will look into a half sloper again (have been using it many years ago on 160m with reasonable results). What’s more, with proper matching, it also performs very well on the 20 meter band. Figure 1 The Balun is hung at a right angle. The Hustler 4-BTV is a four-band trap vertical antenna providing an omni directional pattern. from BOX to on the AIR! NO NEED for STAKES, HAMMERS, SHOVEL, ROPES, POLES and TWO+ men. • No radials • No traps • No ground • No tuning • Handles 1500 Watts hy-gain’s PATRIOT HF vertical antennas are the best built, best performing and best priced multiband verticals on the market today. 80/40m Vertical (+160M at a push. For VHF, anyone who has ever used the old AEA Hot Rod end fed half wave antenna for an HT know the drastic improvement it made over a 1/4 wave antenna. This simulation was based on 3 radials mounted at 20' (woolshed height) over typical clay soil (13,5). If you don't have the space for ¼λ radials, lay down a larger number of shorter ones. 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. This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. HF SSB Antenna Small 35ft garden When joining HamRadioForum you will get a confirmation email which you need to respond to. Experimental measurements and calculations show that with this number, the loss resistance decreases the antenna efficiency. My 40 meter vertical cost me $13. The AV-620 covers all bands 6 through 20 meters with no traps, no coils, no radials yielding an uncompromised signal across all bands. The traps also shortens the antenna a bit. Other antenna arrays do no need to be grounded either as they already use elements 1/2l long, straight or folded. <= Back to Dayton New Products Hy-Gain 80-6 Meter Patriot Vertical Antenna AV-680, $549. Figure 5 is the graph for a 1. Operate 12, 17, 30, and 60 Meters with these MFJ Stealth WARC Band Vertical Antennas. This assumes that there are no earth or grounding losses. 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. or Best Offer. Try not to mount your vertical at, or just above, ground level!. 4m with 8 radials. The element and radials are made from T-832 Drawn aircraft aluminum tubing. Disadvantage: the feedpoint is half way up the antenna, which can present mechanical difficulties. These suggestions are worth noting: "Please do not use metallic "garden staples" to secure radial wires to the top of the ground in a lawn. Vertical monopole receiving antenna for HF A vertical monopole is easy to set up and provides good reception with a minimal need for space. A 1/4 wave on each band that already survived two small storms. Your friend will just have to either find a Spanish retailer or find a. The Comet CHA-250B is a broadband vertical with NO GROUND RADIALS. You Recently Viewed Jetstream JTV680 - 6m thru 80m No-Tune / No-Radials Vertical Base Antenna. HF Antennas Especially stealth models for Need to be mounted high enough that the ladder line is vertical for best No radial verticals Actually a Vertical. 5 to 28 MHz. Cushcraft R9 covers 6,10,12,15,17,20,30,40,80 Meters • NO GROUND SYSTEM OR RADIALS NEEDED • RUGGED CONSTRUCTION • INSTANT BAND CHANGING. For modeling, the initial lengths of the radials and the vertical were made equal and adjusted for resonance at 1. 5MHz Band ham Radio MP1 Counterpoise Ground Plane 5. One more point is worth mentioning. Comet CX-333 $162 uses 3 radials (uses traps) Diamond -X3200A $164 uses 3 radials (uses traps) D. I connected my SGC-211 ATU to the base of the vertical and laid out about 6 short radials on the grass. Vertical Antennas: Compare Cushcraft R9, no radials to 43 foot vertical with ground radials 4 Can I ignore the radial elements of a 2m/70cm antenna if it's on a metal roof?. 825Mhz vertical, which was simulated for Eric, VK3AX. This means radials. Good luck Sir Knight on our quest for the Holy Grail of antennas, the great performing no radial vertical. chameleon HF hf antenna mpas 2. There are a number of verticals available that say "no radials required", but they do have "radials", in the form of a shortened, tuned counterpoise system. But placing a half wave vertical much higher is not always favorable. Page 1 SO-239 female UHF Antenna Location & Mounting The CP6 is a compact vertical antenna using loading-coil radials. Vertical Radial Ground Systems. Variable Radiator and Radial Length at a constant Displacement. The best thing you can do to optimize the antenna is to put an efficient matching network at the base for each band and install a good radial system. It can be fed at the low impedance point at the centre as a half wave dipole or fed at the high impedance point at either end. I did not operate with the antenna, I just erected to see what comments I would get from neighbors. The normal quarter wave ground plane antenna consists of a vertical radiator which is insulated and centered between 4 horizontal surrounding radials which extend out from the base of the antenna. As with all antennas, shortened verticals work best when they are "in the clear" — many meters away from any other objects. NewSuperAntenna is the Official Super Antenna Systems Corporation website. ALL BAND MULTIBAND - 13-Band HF VHF Vertical antenna Ham Radio Amateur - $356. Just over 300 people responded. 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. This is called polarization. i'm always impressed with simple dipoles and always resort to throwing them up. Antenna polarization types. Bundle | 20' DXV + LDG RT-100 | No Radials OCF Antenna All Bands 80-6M - DX Flagpole Antenna See more. 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. On the upper HF bands, it is more practical. It can also be adapted to operate in the 75 meter band. ) - Other (longwires. These suggestions are worth noting: "Please do not use metallic "garden staples" to secure radial wires to the top of the ground in a lawn. If you don't have enough space for a long horizontal antenna, it's an excellent alternative to attic antennas, which typically suffer from low S/N due to their proximity to house wiring. Some hams complain that radials narrow the bandwidth of the antenna. There was a 2 part article by Salas in a recent QST which does a good job of showing how to do this. Be warned however, for shorter antennas the E-field losses are significant and cannot be ignored. Best end fed hf antenna. ham radio antenna se hf-x80 vertical radial free antenna 80 to 6 metres The antenna is rated at 400 watts PEP. Comet Antennas has a CHA-250B HF vertical antenna a straight, aluminum pipe with no parasitic elements, designed for continuous (no gaps) transmit coverage from 3. vertical antenna We aim to post all our items asap Monday to Friday from Delivered anywhere in UK Postage and packaging is included in the price not refundable Please note terms and conditions including. The traps also shortens the antenna a bit. Smart, strong, and elegant all band, stealthy for HOA, No Radials design. 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. ignoring the E-field losses which are usually small for antenna heights of 0. You can see that the. Instead of 4 radials of 5,2 m I now have 8 radials of 2,5 m. 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. Variable Radiator and Radial Length at a constant Displacement. Even full sized verticals need lots of ground radials to achieve best efficiency, and short mobile whips are no exception. 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. High Performance 40 Meters Vertical. Make full use of your sunspot cycle with the Patriots low angle signal. There have been many manufactures over the years that built half wave vertical antennas that had only a few short radials. Please contact us for a shipping quote. For short, a simple vertical 8-m long (26. The complete Wolf system with optional Push Up Mast can be erected in less than 10 minutes! The Wolf Terminated Folded Dipole Antenna is designed as a regional coverage antenna, intended for near and mid-range HF communications in environmental disasters and military tactical scenarios. 5-57 MHz, and receive range is 2-90 MHz. >> 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. 54 £ | 12DBi 2. 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. Operate 12, 17, 30, and 60 Meters with these MFJ Stealth WARC Band Vertical Antennas. You will find that Zero Five is one antenna company that does state their antennas require radials. I can get thru most "pileups" on the first call. 20m Elevated Vertical Antenna - G8ODE. This post describes a simple, easy to make and erect portable vertical antenna for the low bands (160, 80 and 40M). On 80 meters the antenna is 2:1 SWR over only about 20khz. Vertical antenna for sale SIGMA EUROCOM SE-HF-X80 VERTICAL RADIAL FREE ANTENNA: 78. - A standard / remote tuner at the feedpoint will ease construction and allow operation from 3. HY-GAIN DX-77A 7 - 28 MHz Vertical Antenna - 40 - 10 Meters - No Radials Required - 29 Feet Tall - SO239 The DX-77A requires no ground. There are two types, those that are best installed at ground level and those that can be installed on top of a mast. 0:1 VSWR bandwidth,it can sustain a 3. If the antenna is unbalanced, a radial system or counterpoise is necessary for operation. Each radial is evenly spaced (90 degrees apart from each other) around the vertical element. That's why several antenna manufacturers developed verticals that do not use radials at all. A vertical HF antenna can get away with a height of only λ/4. But placing a half wave vertical much higher is not always favorable. A good quarter wave vertical with buried radials can often out perform a dipole that is way up in the air. Another name of it is 'decameter wave' or 'decameter band' since its wavelength ranges from 1to 10 decameters. Designed for hams that do not have room for ground radials. 0:1 VSWR bandwidth,it can sustain a 3. HF verticals are versatile, and can deliver both multiband and monoband performance. But it soon proved very competetive. You can't push it too far off frequency or the matching network explodes. Buy Hf Vertical Antenna and get the best deals at the lowest prices on eBay! Great Savings Free Delivery / Collection on many items. MR6060 SuperWire Radial Set For HF Vertical Antennas 60m 5MHz Band. They are very well built, using good quality "doorknob" capacitors, and nice airwound low-loss coils. So now I have 5 band vertical HF antenna without lossy traps, stubs, loading coils, …. Some years ago, I installed a buried radial vertical antenna for my friend Duane (SK). Your latest requests have been for an antenna that’s easy to setup, needs no radials, covers in addition to all the WARC bands and uses the same GAP technology found in our other products. They all use the same parallel resonant impedance transformer to create about 4,000 ohms at the feed point. The AV-620 covers all bands 6 through 20 Meters with no traps, no coils, no radials yielding an uncompromised signal across all bands. The antenna must be a quarter-wave vertical, and only this design. The element and radials are made from T-832 Drawn aircraft aluminum tubing. That is a whole lot of wire. i'm always impressed with simple dipoles and always resort to throwing them up. GAP Antennas is one manufacturer that offers these kinds of antennas. For true ground plane action and predominantly vertical polarization no fewer than three equally-spaced radials should be used. Click on any photo to zoom. See more ideas about Ham radio antenna, Ham radio and Ham. Solid one inch fiberglass trap forms for optimum electrical and mechanical stability. The best is what ever you can get away with! I have taken a closet pole out for a center mast and run the antenna wily nilly up down , back and forth and it works with some kind of cheap tuner! Open wire feeders OF COURSE! 450 ohm is best, but 300 ohm will surely work and at qrp levels even RG-174U in a pinch. this item sigma eurocom se-hf-x80 vertical radial free antenna 80 to 6 metres Sigma Venom 5/8 wave Silver Rod CB Base Station antenna GPA-80 HF Vertical 80-6M No Gaps No Radials & Perfect SWR With ATU. 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. The most common information is a tabulation of gain relative to number of radials. All Bands Vertical Antenna-HF (homebrew) A few months ago my friend 9W2 AYR(Anuar) and I visited my new friend 9M2LR (Mr. Super Antenna MR8075 SuperWire Radial Set 80m-75meter for HF Vertical Antennas 3. To keep things simple, use non-conductive guy lines. QRPGuys Portable Tri-Band Vertical Antenna. Mobile antennas from HF through UHF are vertical for two major reasons. No complaints of TVI or any interference. Radials were not a consideration as I have had several verticals and they all seemed to work best with radials under them, despite the advertising that a couple of them required no radials. 5:1), and reception from 1 to at least 90 MHz (claimed VSWR 3:1 at 150 MHz). NewSuperAntenna is the Official Super Antenna Systems Corporation website. The antenna presented here is a convenient combination of the Diamond BB7V vertical antenna (modified) and a large irregularly-shaped quad loop of wire, and a wire radial that is used to fine tune the antenna for best comprimise of low SWR on the various frequencies of operation. Catch up instantly on the best stories happening as they unfold. I used heavy copper braid for the radials and used two radials tuned for each band of operation. • No radials • No traps • No ground • No tuning • Handles 1500 Watts hy-gain’s PATRIOT HF vertical antennas are the best built, best performing and best priced multiband verticals on the market today. Vertical antennas have always been a problem because of the limited space for a radial system. How it works: The antenna is fed using 50 Ohm coax via a SO-239 socket at the base of the unit. Indeed, it is a staple for upper-range scanning receivers. The vertical dipole has a very small foot print and requires no radials, 3. As I consider it a temporary antenna, elevated radials would make removal very easy. The antenna is easy to install but does not resonate on amateur bands as described without the use of radials. The new BB7V multiband vertical antenna provides coverage from 2 MHz to 30 MHz without radials and requires the use of a tuner. Click the button below to add the Jetstream JTV680 - 6m thru 80m No-Tune / No-Radials Vertical Base Antenna to your wish list. Made from heavy duty aluminum, the CP6AR assembles easily, and yeilds excellent performance and reliability from a compact base station antenna. This is very short at AM broadcast band frequencies. The DX Flagpole Antenna is an HOA approved, NO Radial, Stealth vertical antenna system. The more radials the better, as long as it's less than 64 (iirc). I can get thru most "pileups" on the first call. His perspectives and the responses to them have been very helpful and fascinating to read. Frequency under HF is called medium frequency or MF. on 75/80 meters. All radials are attached together to the other side of the balun and attached to the shield of the coax cable. 825Mhz vertical, which was simulated for Eric, VK3AX. are (best case) 1/2 wavelong, and fed in the middle with 50 to 70 Ohm coax. The PKW Super Bazooka is a highly abridged vertical antenna without radials for 1,8. 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. The radials "collect" the return current required for efficient antenna operation. Mariotti -Heavy Duty Multi Band Vertical Antenna -CQ. Yes, it is better * for VHF/UHF hand held transceiver (vertical will be smaller as transceiver body will behave as a second part of antenna, counterpoise) * for mobile operation (will have less wind loading at higher speeds, car roof w. Vertical antenna with ground plane radials It is not always necessary to have a minimum of four radials – often even two will suffice. The No-Radial Vertical. But it soon proved very competetive. That is a whole lot of wire. OCF HF Vertical DipoleHigher performance, HF Multiband DX Flagpole Antenna covering 3. Shop with confidence. A vertical HF antenna offers many advantages—an omnidirectional signal collector and easy to install radiator are two of the biggest. * A good ground plane is essential for a vertical to perform well. 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. 6 months ago I set out to determine what the best HF Portable Base antenna could offer: I setup the following antennas: 1) Buddipole Portable Dipole/Vertical 2) Chameleon V3 Antenna 2-160M QRP-250W 3) TransWorld Antennas TW2010 Traveler HF Portable Vertical Antenna I used a rating scale of 1 through 10, with 1 being Poor and 10 being Excellent. For best performance, it’s desirable to use antennas that have the same polarization. NVIS / HF Combo Antennas: EZNEC modelled and On the Air tested. With that said, go look up the cost of one that is being sold in the magazines and on the web. I have tried the Cushcraft R7, it worked, but so did my 1/4 wl 40 meter vert with ground radials, the 1/4 wl with ground radials hands down much better than the cushcraft. 4m with 8 radials. Figure 6 illustrates the construction of a multi-band. 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. ignoring the E-field losses which are usually small for antenna heights of 0. Then a second antenna is a help. EFHW featured in "Stealth. Please note: Due to the size of this antenna, it can only ship via Purolator and extra shipping charges will apply. We sell all types of base station HF Vertical Antennas for ham radio, If you are looking for quality HF-Base station antennas at a great price then look no further, We stock Vertical Antennas,And More, From all the top antenna manufacturers, Includes Cushcraft antennas,Diamond antennas,Radioworks antennas,Comet antennas,Watson Antennas and more. A radial field enhances the ability of the ground around the vertical to conduct RF energy. Best Multiband HF Vertical on a roof Options A 22 foot antenna with four 22 elevated radials driven by an SC-230 will do a good job on 40m-10m and not bad. Radials are only used with some models of vertical antennas. It is designed to work against earth ground or a radial ground system. I often run high power (legal limit) and have experienced no issues. 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. The vertical dipole has a very small foot print and requires no radials, 3. I fondly call it my 24 foot dummy load. The drooping of the ground plane improves the match to 50 ohm coax, which is why ground plane radials on VHF antennas seldom stick straight out. Frequency under HF is called medium frequency or MF. Page 121 of MFJ new 2013 ham catalog Hy-Gain's PATRIOT HF vertical antennas are the best built, best performing and best priced multiband verticals on the market today. MOUNTING ON A VERTICAL METAL POLE WITH WIRE RADIALS If you want to reduce your HF vertical's ground losses but not increase its angle of radiation then you should mount your vertical on top of a 3m-4m long metal pole. Plug and play 80 through to 6m with perfect SWR when used with an external ATU. 5 on entire bandwidth. Here are measurements for each band after experimentally adjusting the radial and vertical lengths…. Both efficiency and a low Take-Off angle are the key to having a FANTASTIC antenna. Vertical Antennas: Compare Cushcraft R9, no radials to 43 foot vertical with ground radials 4 Can I ignore the radial elements of a 2m/70cm antenna if it's on a metal roof?. For true ground plane action and predominantly vertical polarization no fewer than three equally-spaced radials should be used. 40M Vertical October 2014 Radial Choice Page 14 From the ARRL Antenna Book: From QST, March 2010, pp 30 Practical Suggestions For Vertical Ground Systems At least 16 radials should be used if at all possible. Adding a second vertical wire in parallel made it a multiband antenna. 0:1 VSWR mismatch at full power for typical operating intervals. I like to experiment with antennas and have built many dipoles for the various bands. 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. 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. BEST MULTIBAND HF VERTICAL? 3. It is also possible to shorten them with marginal impact on the performance, especially if they are loaded to keep their electrical length. Some hams complain that radials narrow the bandwidth of the antenna. 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. Radials are critical to the performance of any vertical. They let half the signal go into ground because of the lack of radials. “The Comet CHA-250B is a newly design broadband vertical with NO GROUND RADIALS. I know verticals perform better with radials but my mounting restrictions can not include radials. We sell all types of base station HF Vertical Antennas for ham radio, If you are looking for quality HF-Base station antennas at a great price then look no further, We stock Vertical Antennas,And More, From all the top antenna manufacturers, Includes Cushcraft antennas,Diamond antennas,Radioworks antennas,Comet antennas,Watson Antennas and more. I have tried the Cushcraft R7, it worked, but so did my 1/4 wl 40 meter vert with ground radials, the 1/4 wl with ground radials hands down much better than the cushcraft. I have found that for best "ham" results you can use between 18 to 40. In reality it is very difficult to get an antenna RF grounding system that is lossless and it is accordingly difficult to fully realise this gain. Variable Radiator and Radial Length at a constant Displacement. For use 40-10m the antenna is acceptable as is. Vertical antennas with only 2 elevated radials are simple but also quite good antennas for DXing. Plug and play 80 through to 6m with perfect SWR when used with an external ATU. 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. Yes, elevated 2m above ground would be something. Best Multiband HF Vertical on a roof. The most efficient of these verticals are actually vertical dipoles. These suggestions are worth noting: "Please do not use metallic "garden staples" to secure radial wires to the top of the ground in a lawn. Although the auto-tuner provides the ham with a more versatile device as well as protecting the rig's components, the antenna is more vulnerable than ever. For a ground mounted quarter-wave vertical, a minimum of 20 radials, each 20 feet long, should be used. Cushcraft R9 covers 6,10,12,15,17,20,30,40,80 Meters • NO GROUND SYSTEM OR RADIALS NEEDED • RUGGED CONSTRUCTION • INSTANT BAND CHANGING. Without radials, a vertical antenna can still radiate, but not very well. They're ground-independent, half-wave vertical antennas so there are no radials or RF-ground ever needed! MFJ-2286. At the lower end of the HF spectrum, the λ/2 height requirement for horizontal antennas can become cumbersome (even though horizontal phased arrays have a less stringent minimum height requirement). 6 ft) using radials and a commercial "no-radial" vertical will display the same performances, but the SWR of the second antenna at the feed point can reach 20:1 or more without losing any energy but without neither emitting the least watt !. the antenna is 41 feet of radiator on top of a 75 foot tower, it is totaly isolated from the tower, where. Just had too much better results with horizontal'ish antennas. This assumes that there are no earth or grounding losses. how important is a choke balun when using a ground-mounted HF (for 40M) quarter-wave vertical antenna with 32 quarter-wave buried Does a HF vertical antenna need. This is a top-loaded 80/40 meter vertical which replaced my Butternut once I installed a tower with a beam, and no longer needed a vertical to operate above 40 meters. The vertiGo 66V is the best way to maximise your lower HF band DX experience in a small garden. 0:1 VSWR mismatch at full power for typical operating intervals. Although the antenna is best operated within it’s 2. Rest assured, if we cancel or eliminate any field, we no longer have an antenna or counterpoise. They all use the same parallel resonant impedance transformer to create about 4,000 ohms at the feed point. The stand is plenty stout to handle the 23. 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. There are a number of verticals available that say "no radials required", but they do have "radials", in the form of a shortened, tuned counterpoise system. CP6 - 6 Band Trap Vertical — 80 ~ 6m The CP6 are multi-band trap-vertical antennas for HF bands,. Dipole-No radials -Needs Height for DX Monopole-Low height and low radiation angle-Good on low bands-Higher Noise-Many radials required-Depends more on ground quality Antenna Plus Minus Vertical Delta Loop-Low height and low radiation angle-Portable and compact-No radials-Lower Noise-Essentially a mono-band antenna-Depends on ground quality. Vertical Antennas: Compare Cushcraft R9, no radials to 43 foot vertical with ground radials 4 Can I ignore the radial elements of a 2m/70cm antenna if it's on a metal roof?. 8-30 Mc center-loaded HF whip, 51 Mc Whip, 28/27 Mc whip, GPS antenna under a radome on roof, 145 Mc 5/8 wave whip and VHF/UHF scanner whip. Here's a plot of performance of the original four radials (in red), with elevated radials on top of the fence. It fits together really well, nicely engineered, and if you're restricted for antenna installation space, this CHA 250BX-II could well be the answer. HF Antennas Especially stealth models for Need to be mounted high enough that the ladder line is vertical for best No radial verticals Actually a Vertical. The graph below shows the measured VSWR of a 6. 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. Plug and play 80 through to 6m with perfect SWR when used with an external ATU. Vertical Antennas - Ground Radials - Let's Talk about this AGAIN :) What's Best - Ground or Elevated Radials for Vertical Antennas? HF Ham Radio Vertical Project. A 1/4 wave on each band that already survived two small storms. Hustler 6BTV 6-Band HF Vertical Antenna. HF Vertical Antennas and Packages. 825Mhz vertical, which was simulated for Eric, VK3AX. 66 in total. Although the antenna is best operated within it's 2. Radiation straight up is to be minimized. Butternut HF9V Vertical as a Ham Radio ALE Antenna Benefits to the ham radio ALE operator: No tuner needed. Jun 7, 2018- Explore jackheidt's board "Antennas HF", followed by 262 people on Pinterest. My first antenna was an OCF Dipole from Buckmaster which covers 80m - 10m (15m excepted). NO RF BURNS FOR ME THANK YOU VERY MUCH! DX Engineering Vertical Antenna Tilt Base:. So now I have 5 band vertical HF antenna without lossy traps, stubs, loading coils, …. They not apply to other models. The 4:1 Unun was fed with a LDG Z11 Pro Auto-tuner connected directly to it at the base of the antenna. HF SSB Antenna Small 35ft garden When joining HamRadioForum you will get a confirmation email which you need to respond to. 0:1 VSWR mismatch at full power for typical operating intervals. The Antenna comes with a center support and 4 assembled and marked antenna. Mobile antennas from HF through UHF are vertical for two major reasons. No-radial verticals In recent years, several manufacturers have introduced vertical antennas that do not need radials. But among hundreds of product with different price range, choosing suitable end fed hf antenna is not an easy task. In spite of all the aforementioned drawbacks and shortcomings of the hf vertical antenna, they are, in some circumstances, the only solution to get on HF. The different Hustler antennas work well with a good radial field. Additionally, a metal support is often connected to the J-pole antenna, adding a third variable. Stay away from the ones with the boxes with all the matching electronics, they tend to have problems. The radials “collect” the return current required for efficient antenna operation.