Even the so-called no-radial verticals have a counterpoise or "something" and some have elevated radials built in to the design and they just pretend that they don't have radials. The Bulk Radial Wire Kit allows you to cut and install each radial as long as it can be, to fill your antenna space with radials, placed like spokes of a wheel for maximum signal benefit. GRA-1900T Multi-Band HF (160m-6m) 1. Please contact us for a shipping quote. • All of the BTVs can be mounted in a piece of PVC and disguised as a flagpole in deed restricted neighborhoods. An internationally acclaimed antenna design, Butternut HF9V antennas require a radial system or a roof mounting kit. Saved by Daniel Brown. March 6, 2015. Feed with any length. Weight: 17 pounds. MFJ-1836HK34. The vertical Antenna is of multiple bands and ideal for 6 meters through 80meters HF. If you have a satellite dish, clamp a J-pole or MFJ 1754 to the dish mounting pole or bracket. The result is that for small ground systems,. Amateur Radio HF Emergency / Disaster Relief Communications. With a vertical antenna system, the radials are the second half of the antenna. In addition; towers, wire antennas, or verticals needing radials are not applicable at my present location, sadly. Buy some for your favourite bands. An internationally acclaimed antenna design, Butternut HF9V antennas require a radial system or a roof mounting kit. But unless the antenna in question is a vertical dipole, you still need a pathway for the RF currents to return to the antenna. Try suspending it so that the feedpoint is about 11 1/2 feet above ground, so that you can slope the radials at 45 degrees. This is an all-band HF vertical antenna for amateur ham radio. This allowed us to deploy configurations like horizontal dipole, or lazy L. In the case of a multiband trap antenna there is no rejection of some harmonics, simply because the antenna is designed to be resonant on all hf. XYL's approve of the aesthetically pleasing OCF antenna design. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. 49 250 14 17. Antenna should be mounted away from trees, build-ings and other antennas. 25 wl radials work very well. 5MHz) therefore also resonant on second, third, and fourth. Such a nonresonant antenna isn't particularly efficient, but high efficiency is not required for good reception at HF and below (not true for VHF and especially microwave frequencies). For some antennas, the antenna is simply not complete without a radial system, or at least a counterpoise. Cable length is required to reach the shack room. 8-61 MHz, 500-5000 Watts PEP. Super Antenna MR1710 SuperWire Radial Set for HF Vertical Antennas 17m 15m 12m 11m 10m Bands ham Radio MP1 Ground Plane. The reason for this has to do mainly with FCC rules, which largely. (180 degrees). Se Hf -X80 Vertical antenna. No Radials for Higher Performance, Lower Angles, Lower Noise and Lower Loss, for DX 80-6M. Vertical antennas have always been a problem because of the limited space for a radial system. Unfortunately, the MP1 is a quarter wave vertical, without transformer, requiring quarter wave radials. • Completely Isolated From. 20-foot HF Vertical Antenna + remote tuner kit for 160-6M, No Radials is Low angle,, Low noise, high-performance for NVIS, disaster & emergency services. Enter "Vertical" at OnAllBands for more insights on deciding if an HF vertical antenna is right for your Amateur Radio station. Antenna Impedance ( Q Droop Angle (°) Antenna Impedance ( Q vs Droop Angle (°) Ө ¼ λ vertical radials. But if you have no giant trees in which to string up a stealthy wire dipole and if you can't quite camouflage that 30 foot wide 20-meter Yagi as a new age yard sculpture, the flag pole vertical may be an upstanding choice for your HF station. No-radial, 21 ft. Increasing the number and length of radials will increase the antenna system’s SWR but this isn't necessarily a problem provided your rig can cope. User Manuals – Alpha Antenna. The CP6AR multi-band trap-vertical antenna for HF bands, covering the 75*, 40*, 20, 15, 10 and 6m amateur bands. 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 randomised so. A - You should use a pipe with no larger than 2 inch outside diameter, and no smaller than 1 3/4 inch outside diameter. I plan on putting down 32 radials. They eliminate the need for radials by mounting on some distance above the ground. With no radials the 7. However you need the plus kit to get the best out of the antenna. The body of the aerial needs some special constructive elements to tune it into a resonance within different amateur bands. David, I'm no expert. Made as standard with an adjustable radial which enables rapid deployment. Even the so-called no-radial verticals have a counterpoise or "something" and some have elevated radials built in to the design and they just pretend that they don't have radials. This can hand the load of dipoles. It works well. If you buy trap verticals, you will need more radials than usual. Here Is a New Antenna Design That Covers. Durable Construction, Can be Used in Extreme Weather Conditions. No big ugly radials anywhere from head to toe. 8 radials each for 80, 40, 20 & 10. Another way to look at the effect of radials in a vertical mounted above ground is that the radials are shielding the antenna from ground. Antennas include an AM-FM broadcast radio antenna, 1. Using 32 radials at 20 feet long is preferred and highly recommended. The radials contribute to the radiation efficiency of the entire vertical antenna The best procedure is to assume that most earth is a poor conductor over the HF range and that some radial wires will be needed. 0 pounds (0. It is the latest version and is regarded as military-grade due to its high performance capabilities. Again, The HF-360 is a "radial free" vertical antenna, and it comes in 4 parts. 6-80 meter vertical, no radials required jtv-680 multi band hf base antenna. 5MHz) therefore also resonant on second, third, and fourth. Item Information. I am considering placing a vertical HF antenna. Frequency TX: 80 to 6M (3. vertical antenna. Sound difficult? Not so. Q - What kind of pipe should I use for my antenna, is fence post strong enough to hold my antenna up. OCF HF Vertical Dipole Higher performance, HF Multiband DX Flagpole Antenna covering 3. This will provide a net gain over the antenna in free-space. By the same rule the end fed wire WILL require a ground or again. Other types of antennas need no RF ground system at all. DX Engineering Radial Plates are made of 304 Stainless Steel, 1/8 inch thick and 11. Again, The HF-360 is a "radial free" vertical antenna, and it comes in 4 parts. No big ugly radials anywhere from head to toe. 2 m radial, giving a vertical cut at l/2. Low Profile Vertical HF Antenna. So the only problem is tower parasitics. As a rule, we need taking some steps to make any antenna to be resonant on several amateur bands. Get 160-6 Meters Coverage and 1500 Watt Operation with a single antenna! This MFJ-2990 is a 43-foot self-supporting vertical antenna that covers 160 through 6 Meters with the use of an antenna tuner. This HF vertical is HOA and XYL approved. (The more radials, the better). The extra radials help overcome unknown poor-soil conditions, improve bandwidth, and ensure the best performance efficiency possible from the Butternut HF2V antenna. (an "eyesore") I've got a 50' X 50' (14. Jan 09, 2020 · Omni-directional. Solid one inch fiberglass trap forms for optimum mechanical stability. Stealth and non-Stealth available. The finished antenna therefore consists of a λ/4 vertical with two λ/4 radials. A vertical HF antenna can get away with a height of only λ/4. What do Hams think?. The radials contribute to the radiation efficiency of the entire vertical antenna The best procedure is to assume that most earth is a poor conductor over the HF range and that some radial wires will be needed. The HAM Radio antenna is ideal for indoor or. OCF HF Vertical Dipole Higher performance, HF Multiband DX Flagpole Antenna covering 3. The 27 foot 10-40 meter Multi-Band Vertical antenna is a freestanding vertical element. " Posted on August 15, 2016 August 18, 2016 by Jose VA3PCJ The "senior" (full-length) W3EDP, as originally described (QST March 1936, pp. So, let's look at my top picks with their features and limitations. No radial verticals Actually a Vertical Dipole FX Tenna Bravo 5 HF Antennas Especially stealth models for those in an HOA Author: D. Once you elevate a vertical, two. Get it as soon as Fri, Jul 16. GAP Antennas is one manufacturer that offers these kinds of antennas. 05l above ground and, for safety reasons, not less than 2m high. That is when this antenna started to play well. Greyline 16-foot DX Flagpole Antenna, a real Flagpole approved for ham radio in HOA, smart design for Stealth, No Radials, OCF vertical antenna, a vertical-dipole, for 80-6M. A Ground Plane antenna's radials are provided in pairs and are slightly longer( 5-10%) than the radiator. The current on each radial will be equal to the total current on the vertical element divided by the number of radials, so "the more the better". Radials will enhance the performance of the antenna. Feb 17, 2015 · Vertical antennas with only 2 elevated radials are simple but also quite good antennas for DXing. 8 out of 5 stars. It requires no radials, no tunings or adjustments. With one radial the antenna is no longer omnidirectional, the side with no radial is down by 4 d, that energy now appears at high elevation angles on the radial side and can be advantageous for close in contacts (0 to 400 miles). Greyline 12-foot DX Vertical Antenna, an OCF vertical dipole for all band HF radio operation. Get it as soon as Fri, Jul 16. Use our simple calculator to determine approximate dimensions of materials needed to build a vertical antenna. Experiment 1 - Vertical Attached to Ground Rod with No Radials. Butternut HF9V as a ham radio ALE HF antenna. There are times, however, where a shortened vertical for the lower HF bands (such as 80/75 meters) is necessary where horizontal space is lack. The currents. Optimising weak signal HF reception: Good weak signal reception is achieved by improving the signal to noise ratio (S/N) of the received signals. 5MHz – 57MHz! It is not a 1/4 wave vertical, but an end-fed long wire type antenna with a matching transformer in a vertical position. There would be no way to pull the radials back to make up for this with out digging them up - not an option with out a Nephew in site. Unfortunately, the MP1 is a quarter wave vertical, without transformer, requiring quarter wave radials. There is no "good" HF vertical that doesn't have something to balance the vertical part of the antenna. It really helps. The more radials you install, the more efficient your antenna system. See full list on n1fd. The radial arms terminate in a loop of copper wire. A 45° downward angle works only for 2- or 3- radials, otherwise use 40°. One half of the dipole is the IMax-2000, and the other half is your feedline. I have found that almost any piece or wire or metal will work as an effective antenna on HF if it is long enough and reasonably in the clear. The currents. This attractive patriotic home-brew special (Figure 1), accomplishes all these at modest cost. No radials are required. HF Vertical Antennas and Packages. Performance was not all that great but it did work. Any of the no radial verticals like the Cushcraft R7000 series (which I have personal experience with) or the GAP Titan (I had that one too) and others will work head and shoulders better than the Comet 250B for a similar. 61 or Lower on All Bands! Fits Optional Mast Pipes Between 1-2 Inch Diameter. My antenna supported in it's wooden box, ready for portable operation. Radials will enhance the performance of the antenna. Max Power: 1500 Watt. If you are going to ground-mount a 1/4w vertical, then the radials do not have to be tuned [cut for band] but should be high in number (32-64 a 1/4w in length for the lowest bands you'll be operating). radials at about 45° that the antennas impedance is close to 50Ω. AYL-4 Wire Kit Antenna wire, stakes, radial ring. Get the DX Engineering Radial plate and just do it. Be prepared to put out as many radials as you , espescially if it is mounted at ground level. Jan 24, 2019 - 20-foot HF Vertical Antenna + remote tuner kit for 160-6M, No Radials is Low angle,, Low noise, high-performance for NVIS, disaster & emergency services. Configured like that, the feed point would be closer to 36 ohms. Primarily designed for use on the Amateur Radio bands…. hy-gain - rrk-88 - roof mount radial kit for vertical hf antennas from 10 to 80 meters (dx-88 and similar types) OUT OF STOCK - NO MORE AVAILABLE 139. This HF vertical is HOA and XYL approved. The % Length compared to a dipole gets gradually shorter as radials are added. VSWR = 1:1 on all bands. Vertical Antennas Projects category is a curation of 185 web resources on , Revisiting the Rybakov 806 Vertical Antenna, Multiband HF Vertfical Antenna, 7 Bands Semi Vertical Antenna. Further, more and shorter radials are better than fewer and longer radials. Tunes & Performs Without Radials or Antenna Tuners. You can secure the wires under the corner of the shingles or stick them down using a silicone caulk so they will not move in the wind. An internationally acclaimed antenna design, Butternut HF9V antennas require a radial system or a roof mounting kit. 6-80 meter vertical, no radials, fiberglass jtv-680f multi band hf base antenna. No balun, no tuner. Dipoles are one of the simplest antennas to build or construct and erect for the HF amateur radio bands, and on top of this they can be very effective. With no radials the 7. 5 Band Vertical HF Fixed Station 10, 15, 20, 40, and 75 or 80 Meters. Being inexpensive, probably it is one of the best choices. For more versatility, non-resonant antennas are the best option for HF. Heavy gauge aluminum with stainless steel hardware construction throughout. The body of the aerial needs some special constructive elements to tune it into a resonance within different amateur bands. FREE Shipping on orders over $25 shipped by Amazon. A 45° downward angle works only for 2- or 3- radials, otherwise use 40°. Enter "Vertical" at OnAllBands for more insights on deciding if an HF vertical antenna is right for your Amateur Radio station. vertical antenna. hy-gain - rrk-88 - roof mount radial kit for vertical hf antennas from 10 to 80 meters (dx-88 and similar types) OUT OF STOCK - NO MORE AVAILABLE 139. Covers all bands 6 thru 20 Meters with no traps, no coils, no radials yielding an uncompromised signal across all bands. multiband HF verticals and basically I'm after some recomedations on what to get based on my restrictions. You also want to look for an antenna that is easy to tune. However, an improvement of the ground system below ANY antenna (except maybe a Beverage antenna) will help its overall performance. Handles Up to 1000 Watts PEP. When choosing a mounting location, keep the following factors in mind: (1) Resonant frequency of HF antennas can change based on location. 0 10 20 30 40 50 60 70 80 0 20 40 60 80 100. Then too, the included Grounded Counterpoise wire (no radials) and stake will run in the opposite direction of the wire NVIS element, and this grounding completes the balanced circuit at the antenna (Note - Without the ground there would be no path for current, which means that there would be an open circuit and the system would not work as efficiently). Choose an antenna, an antenna bundle (antenna + atu) or create your own in your cart. T he vertical is a popular antenna among hams who lack the space for a beam or long wire antennas. GRA-1900T Multi-Band HF (160m-6m) 1. View the manufactures page for BB7V View the eham review page for BB7V The new BB7V multiband vertical antenna provides coverage from 2 MHz to 30 MHz without radials and requires the use of a tuner. These are run to convenient points where they can be anchored. It is not always necessary to have a minimum of four radials - often even two will suffice. (A dipole antenna can be operated on its odd multiple harmonics!) The horizontal portion of this ham radio HF antenna should be at least 60% of the overall length, for best performance. Again, the ARRL Antenna Book has a long discussion on this, and the data are surprising. Especially unique among verticals, it is horizontally polarized, affording up to 3dB less band noise. So, this might be a deciding factor when buying vertical Hf antennas. T he vertical is a popular antenna among hams who lack the space for a beam or long wire antennas. No Radials, is smart. As I have said, this article lets you get the best ham radio antenna by letting you compare the popular options among the users, not by any fake taglines like "Professional-style antenna" or "HF vertical antenna no radials that work". It really helps. Cushcraft R9 covers 6,10,12,15,17,20,30,40,80 Meters. Say you have 500-feet of wire to use for radials for your new 40m vertical. With one radial the antenna is no longer omnidirectional, the side with no radial is down by 4 d, that energy now appears at high elevation angles on the radial side and can be advantageous for close in contacts (0 to 400 miles). Base Antenna Dropshipped from Hy-Gain HF 80,40,20,15,10 Meters Base Loaded Vertical Antenna. Greyline's HF Vertical Antennas for Real DX, 160-6M, No Radials. In terms of cost, a sizeable beam antenna and 75-foot crank-up tower will set you back at least $2,500. 10 Best HF Vertical Antenna Review in 2020 – Top Picks of Multi Band HF Antennas (No Radials, Tuning or Adjustments!) Whether you are a radio enthusiast and want the perfect antenna for recreation purposes or you are looking for the ideal piece for your amateur station, you deserve the ideal vertical antenna. I needed an HF antenna that would be lightweight and durable. Your new Hustler® HF antenna system offers automatically selected multi-band coverage with an omni-directional pattern. This is the best multiband HF vertical antenna for base or portable that uses a balanced OCF dipole system with a very tunable SWR on 10-80 meters and an option for 160M that uses no radials. 092 wavelength long -2Rr decreases approximately as 1/(length) -So Rr is approximately 5 ohms -With 10 ohms ground loss, the efficiency is 33% - Assumes no trap/inductor losses (trap loss could add 2dB). The antenna is rated at 300 watts side band. This is a true unbalanced antenna, with a feed impedance of around 50Ω and therefore a great. 20 foot hoa 6-20 meter no radial multiband foldover vertical antenna with unun view details; 27 foot hoa 10-40 meter no radial multiband foldover vertical antenna with unun view details; 33 foot 10-80 meter multiband foldover vertical antenna with unun view details; 43 foot 10-160 meter multiband foldover vertical antenna with unun view details. Handles Up to 1000 Watts PEP. Q - What kind of pipe should I use for my antenna, is fence post strong enough to hold my antenna up. Again, more is better and will increase efficiency. Featured Antennas. Height: 25. • Completely Isolated From. Get the feedpoint up about 17 feet and use it as a vertical dipole. Having a 1:1 SWR does not mean you have a good antenna. Stealth and non-Stealth available. It may be usable on higher frequency bands with an antenna tuner, though it could be hard to tune on exact even harmonics in the 14Mhz and 28Mhz bands because exact 1/2 wave verticals have very high impedance. Will this work? Second question, is it possible to place traps in the radials so one radial works on 2 bands for example? 73, PE2HD, Harry. Se Hf -X80 Vertical antenna. antenna) was used commonly in amateur and commerical antenna systems for more than 10 years. Your friends, family. Add to Wish List Add to Compare. Vertical Antennas Projects category is a curation of 185 web resources on , Revisiting the Rybakov 806 Vertical Antenna, Multiband HF Vertfical Antenna, 7 Bands Semi Vertical Antenna. For 40M operation, the long (66'6″) segment is again used, but this time as a λ/2 antenna. 2 m radial, giving a vertical cut at l/2. Equal or Better Performance than verticals requiring Radials!. 5MHz to 30MHz continuously with low SWR. Bands: 10-15-20-30-40 & 75 or 80 meters Length/weight: 24 ft. Se Hf -X80 Vertical antenna. They lie directly on the ground, or just under it, and there is a relationship between numbers of radials, radial length and efficiency. How good is a g5rv and how do they work? For mid 80 meter operation. The DX Flagpole Antenna is an HOA + XYL approved, No Radials, stealth HF antenna system that offers you Real DX from 160-6M including WARC bands. The radials may be cut from 4 or 5-conductor rotor cable or made from individual wires. The dimensions in electrical degrees are provided. When choosing a mounting location, keep the following factors in mind: (1) Resonant frequency of HF antennas can change based on location. Smart Design, Premium Rugged Quality, All Band OCF Vertical Dipole Antenna, No Radials Required for maximum performance. I mounted the antenna 3 ft from ground and received swr across bands >9 with the use of my RigExpert AA54 antenna analyzer. However, my Alpha antenna requires an antenna tuner because the SWR is over 2:1 on all bands 6-80 meters except on 10 meters where the SWR is an average of 1. A - You should use a pipe with no larger than 2 inch outside diameter, and no smaller than 1 3/4 inch outside diameter. Handles Up to 1000 Watts PEP. How do they acheive good match across such a bandwidth, surely it must be a resistive load in the base? 2. This means radials. Especially unique among verticals, it is horizontally polarized, affording up to 3dB less band noise. One more point is worth mentioning. It has super wide bandwidth. radials at about 45° that the antennas impedance is close to 50Ω. Greyline 16-foot DX Flagpole Antenna, a real Flagpole approved for ham radio in HOA, smart design for Stealth, No Radials, OCF vertical antenna, a vertical-dipole, for 80-6M. The antenna consists of a 22 foot long 2X2 mast, or two 12 foot pieces may be bolted together, and the radiators are #12 or #14 copper house wire with plastic coating. 20' HF Vertical Antenna, No Radials 160-6M + LDG RT-100 ATU 20-foot HF Vertical Antenna + remote tuner kit for 160-6M, No Radials is Low angle,, Low noise, high-performance for NVIS, disaster & emergency services. Radial Choice Page 13 From the ARRL Antenna Book: Practical Suggestions For Vertical Ground Systems At least 16 radials should be used if at all possible. I am considering placing a vertical HF antenna. Choose from 12, 16, 20 and 28 footers! (flag or non-flag) that all operate from 80-6 meters with impressive efficiency. 6:1 at band edges typical). Radial wires do not need to be resonant lengths on the ground. This is because ground losses are being reduced, allowing the antenna impedance to approach the natural 35 ohms or so of a quarter wave vertical. No Radials for Higher Performance Lower Angles, Lower Noise and Lower Loss, for all frequencies 160-6M. The closer any antenna gets to the ground the more current. • All of the BTVs can be mounted in a piece of PVC and disguised as a flagpole in deed restricted neighborhoods. radials at about 45° that the antennas impedance is close to 50Ω. Click & Collect. A 43 foot vertical with ground radials could be an excellent 1/4 wave vertical antenna for 7Mhz/40m. Verticals require radials, horizontal wires that run along the ground, to create the other "half" of the antenna. My neighbors wouldn’t have a clue. GRA-1900T Multi-Band HF (160m-6m) 1. 5MHz - 57MHz! It is not a 1/4 wave vertical, but an end-fed long wire type antenna with a matching transformer in a vertical position. You can secure the wires under the corner of the shingles or stick them down using a silicone caulk so they will not move in the wind. It may be usable on higher frequency bands with an antenna tuner, though it could be hard to tune on exact even harmonics in the 14Mhz and 28Mhz bands because exact 1/2 wave verticals have very high impedance. For ham radio, NVIS work, disaster, & emergency communications. A trap-free design ensures the best bandwidth possible. A few ohms of ground resistance will bring it closer to 50 ohms, but only warms the dirt. The antenna can be pole mounted at ground level or elevated depending on the user's personal requirements. ) one feet above earth and 3 umbrella wires - The resonant frequency ~ 5. and has a wind load of just 2 square feet. 5kg) MP1DXR SuperWhip Ruggedized 40m-10m HF w/U-mount & radials Go Bag 3. Enter "Vertical" at OnAllBands for more insights on deciding if an HF vertical antenna is right for your Amateur Radio station. Saved by Daniel Brown. The antenna can be pole mounted at ground level or elevated depending on users requirements. 5kg) MP1R SuperWhip Ruggedized 40m-10m HF w/Universal Mount & radials 1. 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). As far as completing the half wavelength antenna is concerned there is no difference between vertical and horizontal orientation! No radials are required. I then mounted the antenna 12 ft from ground with no change. SIGMA SE-HF-360 Fibreglass Vertical Antenna + SIGMA SE-HF X-80 & SE-HF-360 PLUS KIT and You could put the vert up and run coax to the shack with no radials and it would " work" But the "other half " of the antenna would be the braid of your coax which you don't really want. A Ground Plane antenna's radials are provided in pairs and are slightly longer( 5-10%) than the radiator. Smarter, stronger and more elegant all-band ham radio antenna option. OCF HF Vertical Dipole Higher performance, HF Multiband DX Flagpole Antenna covering 3. Primarily designed for use on the Amateur Radio bands…. Minimum 15' diameter required for mounting radials. 0 10 20 30 40 50 60 70 80 0 20 40 60 80 100. I put down a SHITLOAD of them, for 10, 15, *17*, 20, 40, and 80. A basic antenna setup for such a station is to use a dualband VHF/UHF antenna to cover 2m and 70cm, along with a multi-band HF antenna. As I have said, this article lets you get the best ham radio antenna by letting you compare the popular options among the users, not by any fake taglines like "Professional-style antenna" or "HF vertical antenna no radials that work". 5:1 over the entire band. counterpoise « on: August 12, 2010, Hi, Just wanted to share some lessons I have learned over the past few days while "playing" with antennas. monopole (Antenna 3). So, this might be a deciding factor when buying vertical Hf antennas. So far in the $50 Ham series, I've concentrated mainly on the VHF and UHF bands. High-frequency mobile antennas are not perfect performers, regardless of their owner's DX claims. Performance was not all that great but it did work. 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. This is because ground losses are being reduced, allowing the antenna impedance to approach the natural 35 ohms or so of a quarter wave vertical. Make full use of your sunspot cycle with PATRIOT'slow angle signal. A vertical HF antenna can get away with a height of only λ/4. These elements can be concentrated (LC, L, C, for. 49:1 Balun Choke Counterpoise. We used two of them on the hot and cold sides at the antenna feed point. The HF-360 is an end fed vertical fibreglass antenna capable of allowing the user to work 80 meters through 10 meters using an ATU, also not requiring any counterpoise. Plug and play 80 through to 6m with perfect SWR when used with an external ATU. " Posted on August 15, 2016 August 18, 2016 by Jose VA3PCJ The "senior" (full-length) W3EDP, as originally described (QST March 1936, pp. Power: full legal limit CW and SSB 1000W. I bought it from here: https://www. Quantity: More than 10 available / 40 sold / See feedback. With a vertical antenna system, the radials are the second half of the antenna. The antenna comes in 4 parts,3 fibreglass poles and 1 stainless steel tapered whip. counterpoise « on: August 12, 2010, Hi, Just wanted to share some lessons I have learned over the past few days while "playing" with antennas. HF Vertical Antenna. Clearly this radial is /4 resonant at a lower frequency than 7. Stock with the supplied balun and no radials it was disappointing and with the stock balun and 30ish radials it was starting to wake up. Another popular design is the Arrow Open Stub J-Pole antenna. Your new Hustler® HF antenna system offers automatically selected multi-band coverage with an omni-directional pattern. 16-foot Flagpole Antenna 160-6M. A 45° downward angle works only for 2- or 3- radials, otherwise use 40°. I dont have a big plot of land and can't fit in a multiband dipole unfortunately. XYL's approve of the aesthetically pleasing OCF antenna design. 000 MHz and 29. That is when this antenna started to play well. The extra radials help overcome unknown poor-soil conditions, improve bandwidth, and ensure the best performance efficiency possible from the Butternut HF2V antenna. That should satisfy the most scientific of you. I then mounted the antenna 12 ft from ground with no change. Equal or Better Performance than verticals requiring Radials!. This allowed us to deploy configurations like horizontal dipole, or lazy L. 5m vertical wire antenna (supported on a 10m fishing pole) fed against 10 buried radials, and terminated with differing values of resistive loads. Brown, "Ground Systems as a Factor in Antenna Efficiency" Proceedings IRE (now IEEE), June 1937, p 753. These are the challenges. Vertical Antennas - Ground/Radial Systems, Phased Arrays of Short. Screwdriver antennas allow the antenna to be adjusted so that its bandwidth covers the frequency you are operating on. Add to Wish List Add to Compare. Double Delta HF Loop Antenna. The radials contribute to the radiation efficiency of the entire vertical antenna The best procedure is to assume that most earth is a poor conductor over the HF range and that some radial wires will be needed. Smarter, stronger and more elegant all-band ham radio antenna option. NO RADIAL VERTICAL, 2 - 30MHz (TUNER REQUIRED) This item is currently out of stock. Contact Us Today (772) 571-9922 or email c[email protected] This antenna is EXTREMELY easy to assemble, requires no tuning or adjustments and VSWR is under 1. See full list on n1fd. 25 wavelength. The resonate frequency lowered a bit. An RF switch is convieniently mounted at the top to switch between 80 and 160 Meter operation. However, my Alpha antenna requires an antenna tuner because the SWR is over 2:1 on all bands 6-80 meters except on 10 meters where the SWR is an average of 1. I also wanted to see for myself just how good or bad verticals really are. 5kg) MP1DXR SuperWhip Ruggedized 40m-10m HF w/U-mount & radials Go Bag 3. The 27 foot 10-40 meter Multi-Band Vertical antenna is a freestanding vertical element. Full Size HF Antennas. It is designed for HOA and deed restricted hams that require a stealth antenna. If you're squeezed for space, give this antenna a try. It is for all Super Antenna MP1 series portable HF antenna systems. By John Portune W6NBC. It is for transmitting and receiving on HF radio frequencies. Handles Up To 250W PEP SSB Power. 61 or Lower on All Bands! Fits Optional Mast Pipes Between 1-2 Inch Diameter. 3 fiberglass poles with 1 whip made of stainless steel. Portable antennas - radials vs. All-band HF Flagpole Vertical. 5-57MHz) with external any tuner. This Double Delta Loop is a 30 ft. Looking for the best HF vertical antenna no radials? Then no-radial vertical antennas are for you. A tuner will generally be required. Smart Design, Premium Rugged Quality, All Band OCF Vertical Dipole Antenna, No Radials Required for maximum performance. Saved by Daniel Brown. From them, you have to choose the best one. A - Fence post is not strong enough for a antenna support pipe, use galvanized water pipe or black gas line pipe. They too, require radials to work well. 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). 6-80 meter vertical, no radials, fiberglass jtv-680f multi band hf base antenna. You may be surprised to hear this, but the antenna you describe isn't actually a vertical, but a dipole. NO RADIAL VERTICAL, 2 - 30MHz (TUNER REQUIRED) This item is currently out of stock. When choosing a mounting location, keep the following factors in mind: (1) Resonant frequency of HF antennas can change based on location. With one radial the antenna is no longer omnidirectional, the side with no radial is down by 4 d, that energy now appears at high elevation angles on the radial side and can be advantageous for close in contacts (0 to 400 miles). • All of the BTVs can be mounted in a piece of PVC and disguised as a flagpole in deed restricted neighborhoods. Radials must be tight, one end insulated, the other one fixed at the antenna base (in fact to the mast, the gray tube) to be efficient as their are fully integrated in the antenna design. The ideal antenna patterns of the compact array dipoles are generated by (1) picking a pointing angle for maximum gain, and (2) using the cosine. How good is a g5rv and how do they work? For mid 80 meter operation. This antenna is still in the air after 8 years of use. Get 160-6 Meters Coverage and 1500 Watt Operation with a single antenna! This MFJ-2990 is a 43-foot self-supporting vertical antenna that covers 160 through 6 Meters with the use of an antenna tuner. This is the best multiband HF vertical antenna for base or portable that uses a balanced OCF dipole system with a very tunable SWR on 10-80 meters and an option for 160M that uses no radials. Greyline 16-foot DX Flagpole Antenna, a real Flagpole approved for ham radio in HOA, smart design for Stealth, No Radials, OCF vertical antenna, a vertical-dipole, for 80-6M. MFJ-2386 HF/6M 250W Compact Vertical Antenna 3. No radials needed! Works great at low heights. Comet I have naggling thoughts about both these antennas. Greyline 28-foot HF Vertical Antenna for all-band HF radio operation. This can hand the load of dipoles. 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). Premium HF Vertical Dipole Antenna for 160-6M. DBDX-41 NO RADIAL ANTENNA ON 75 METERS, KC9MDS TESTING THIS NEW ANTEENA OF HIS DESIGN. Unfortunately, the MP1 is a quarter wave vertical, without transformer, requiring quarter wave radials. Once you elevate a vertical, two. Handles Up To 250W PEP SSB Power. Cushcraft achieved a major breakthrough in the development of an HF multiband vertical antenna that has been specifically designed for use with a tuner and amplifier. You've seen on the channel how we have made the MP1 into a balanced antenna. Common Mode RF Chokes For The Ham Radio HF Antenna. Yes, it is possible to design a vertical antenna that doesn't use radials. •Vertical HF Base station antenna • High power handling capability • Low and High radiation angle for excellent DX • Factory tuned to your specifications • heavy duty construction • waterproof • No Radials Requiered • Protection from static discharges DC-Ground • Made of aluminum alloy 6063 T-832. I found the plus kit worked very well, and worth the extra. Get the DX Engineering Radial plate and just do it. Being inexpensive, probably it is one of the best choices. This creates a matched antenna, with a quarter wave as the radiator and a quarter wave as the ground. It is for all Super Antenna MP1 series portable HF antenna systems. High-frequency mobile antennas are not perfect performers, regardless of their owner's DX claims. At 76° down angle a 1-Radial antenna is 1. Add at least two radials a quarter wavelength long for each band. Choose from 12, 16, 20 and 28 footers! (flag or non-flag) that all operate from 80-6 meters with impressive efficiency. Yes, you can reach a point where the benefits of adding more radials levels off, but that number is somewhere around 100! 9. Greyline 16-foot DX Flagpole Antenna, a real Flagpole approved for ham radio in HOA, smart design for Stealth, No Radials, OCF vertical antenna, a vertical-dipole, for 80-6M. I plan on installing a vertical antenna soon. DBANTENNA - The New DBDX-41 HF Antenna. Because I can only place the antenna at the edge of my property, I can only place radials for one half. 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. The Comet CHA-250B is a newly designed broadband vertical requiring NO GROUND RADIALS. 20 foot hoa 6-20 meter no radial multiband foldover vertical antenna with unun view details; 27 foot hoa 10-40 meter no radial multiband foldover vertical antenna with unun view details; 33 foot 10-80 meter multiband foldover vertical antenna with unun view details; 43 foot 10-160 meter multiband foldover vertical antenna with unun view details. For many ham radio operators, it is not feasible to put up a a full length dipole on HF. Figure 6—This is the SWR curve for my installation which uses an 8-foot ground rod and no radials. No radial verticals Actually a Vertical Dipole FX Tenna Bravo 5 HF Antennas Especially stealth models for those in an HOA Author: D. It really helps. Resonate frequency of the antenna was around 7. Works very nicely with low SWR on 80,40,20,15 on my old FT-707 with No antenna matching (direct into radio, No ATU) It also works well on all other bands with impedance matching. The bottom line is that the difference between around 15 radials and 120 radials is negligible. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. Ha represents the vertical portion and Hb is the. At HF, the conductors tend to be ordinary wires attached to the ground point on the antenna. DBDX-41 NO RADIAL ANTENNA ON 75 METERS, KC9MDS TESTING THIS NEW ANTEENA OF HIS DESIGN. 6:1 at band edges typical). ” Great as this idea. In order to make selling and assembling of these antennas more simple, they are not anchored. TITAN DX $ 499. The closer any antenna gets to the ground the more current. But without radials the inefficiency is still an issue, The best mobile HF option I have seen was a built on a C. No Radials for Higher Performance Lower Angles, Lower Noise and Lower Loss, for all frequencies 160-6M. Even the so-called no-radial verticals have a counterpoise or "something" and some have elevated radials built in to the design and they just pretend that they don't have radials. Mar 3, 2019 - 20-foot HF Vertical Antenna + remote tuner kit for 160-6M, No Radials is Low angle,, Low noise, high-performance for NVIS, disaster & emergency services. radials at about 45° that the antennas impedance is close to 50Ω. We used two of them on the hot and cold sides at the antenna feed point. A tuner will generally be required. Cushcraft R-9 Vertical HF Antenna. Jan 24, 2019 - 20-foot HF Vertical Antenna + remote tuner kit for 160-6M, No Radials is Low angle,, Low noise, high-performance for NVIS, disaster & emergency services. Your friends, family. The CP6A is a compact vertical antenna using loading-coil radials. Use lightweight TV hard- ware to mount on your chimney, balcony, mast. A Station's Signal Is Only As Good As Your Antenna. One half of the dipole is the IMax-2000, and the other half is your feedline. We used two of them on the hot and cold sides at the antenna feed point. No radial verticals Actually a Vertical Dipole FX Tenna Bravo 5 HF Antennas Especially stealth models for those in an HOA Author: D. Increasing the number and length of radials will increase the antenna system’s SWR but this isn't necessarily a problem provided your rig can cope. Antennas include an AM-FM broadcast radio antenna, 1. 5MHz - 57MHz! It is not a 1/4 wave vertical, but an end-fed long wire type antenna with a matching transformer in a vertical position. Get the DX Engineering Radial plate and just do it. Saved by Daniel Brown. HF Vertical Antenna. No getting around radials. I have elected to use the perfect-ground field intensities without the attenuation factor. Use our simple calculator to determine approximate dimensions of materials needed to build a vertical antenna. It requires no radials, no tunings or adjustments. HF antennas that are lightweight and require no radials are most suited for traveling. HFLINK is the international resource for ALE Automatic Link Establishment High Frequency Communications, HF Digital Messaging, Emergency / Disaster Relief, Interoperative HF Communications, HF Network, Ham Radio. A trap-free design ensures the best bandwidth possible. SIGMA SE-HF-360 Fibreglass Vertical Antenna + SIGMA SE-HF X-80 & SE-HF-360 PLUS KIT and You could put the vert up and run coax to the shack with no radials and it would " work" But the "other half " of the antenna would be the braid of your coax which you don't really want. So far in the $50 Ham series, I've concentrated mainly on the VHF and UHF bands. Vertical Antennas - Ground/Radial Systems, Phased Arrays of Short. Get it as soon as Fri, Jul 16. At a height of about λ/2, the nearby ground reflection of a horizontal HF antenna will start to be constructive at interesting take-off angles for long- distance ionospheric contacts. In an electrical sense, a vertical is a dipole with half of its length buried in the ground or "mirrored" in its counterpoise system. Surf to YouTube and watch my film, "how many radials do I need". Full band coverage on 10-40 meters (1. It requires no radials, no tunings or adjustments. However, this "shortened" antenna will not disappoint you! John, OZ3PAX built one for the 17 meter band. Unless they are operating as loaded end-feds or something, this is the only explanation I can figure out for how HF verticals like the Comet CHA250B might be working in practice with no radials. The 27 foot 10-40 meter Multi-Band Vertical antenna is a freestanding vertical element. That is when this antenna started to play well. We used two of them on the hot and cold sides at the antenna feed point. XYL's approve of the aesthetically pleasing OCF antenna design. This is because ground losses are being reduced, allowing the antenna impedance to approach the natural 35 ohms or so of a quarter wave vertical. I use a variety of SLA batteries and take 100ft of RG8x and/or 80ft of LMR400 for feedlines, both fit in the tub of antenna stuff. Radials: There is much written about the topic of radials. No Radials for Higher Performance Lower Angles, Lower Noise and Lower Loss, for all frequencies 160-6M. Choose items to buy together. See why the Greyline DX Vertical Antenna is called a high-performance antenna system. OptionalGuy Wire Kit, AGK-8, $56. I put down a SHITLOAD of them, for 10, 15, *17*, 20, 40, and 80. 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 randomised so. It is for transmitting and receiving on HF radio frequencies. Yes, it is possible to design a vertical antenna that doesn't use radials. We used two of them on the hot and cold sides at the antenna feed point. No-radial, 21 ft. 5 — Dimensions for a quarter-wave ver. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Bands: 10-15-20-30-40 & 75 or 80 meters Length/weight: 24 ft. Please contact us for a shipping quote. 20' HF Vertical Antenna, No Radials 160-6M + LDG RT-100 ATU 20-foot HF Vertical Antenna + remote tuner kit for 160-6M, No Radials is Low angle,, Low noise, high-performance for NVIS, disaster & emergency services. 61 or lowers on all bands. You may be surprised to hear this, but the antenna you describe isn't actually a vertical, but a dipole. Gain increases slightly as the number of radials increase from 2 to 6. 05l above ground and, for safety reasons, not less than 2m high. Plug and play 80 through to 6m with perfect SWR when used with an external ATU. Therefore, I an searching for a reasonably priced vertical, not requiring radials, to get on the air. As I have said, this article lets you get the best ham radio antenna by letting you compare the popular options among the users, not by any fake taglines like "Professional-style antenna" or "HF vertical antenna no radials that work". A few ohms of ground resistance will bring it closer to 50 ohms, but only warms the dirt. As far as completing the half wavelength antenna is concerned there is no difference between vertical and horizontal orientation! No radials are required. Build your own L Network antenna tuner. 2 MHz was obtained with h=33' 7". This multiband vertical designs provide 9 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30, 40 and 80 meter bands. There is no "good" HF vertical that doesn't have something to balance the vertical part of the antenna. 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. 5 Band Vertical HF Fixed Station 10, 15, 20, 40, and 75 or 80 Meters. No radials needed! Works great at low heights. For short, a simple vertical 8-m long (26. Smarter, stronger and more elegant all-band ham radio antenna option. 2 feet long), made of solid silver rod, in the middle of the roof of an average vehicle, the efficiency would barely meet 90%. Choose from 12, 16, 20 and 28 footers! (flag or non-flag) that all operate from 80-6 meters with impressive efficiency. I have had this antenna since 2001 and it has weathered many a storm without a single failure. Select options. Jun 11, 2021 · Unfortunately, the MP1 is a quarter wave vertical, without transformer, requiring quarter wave radials. March 6, 2015. Greyline DX Feedline Kit. See more ideas about ham radio antenna, radio antenna, antenna. The really poor performance of the Comet can turn a new ham off on HF leaving them with the opinion that HF is a lost cause. No Radials for Higher Performance Lower Angles, Lower Noise and Lower Loss, for all frequencies 160-6M. mounting tube for direct placement into the earth or mounting into a standard steel TV mast. I have elected to use the perfect-ground field intensities without the attenuation factor. You do need to swap whips to change bands but at least you're on the air. An internationally acclaimed antenna design, Butternut HF9V antennas require a radial system or a roof mounting kit. 8-61 MHz, 500-5000 Watts PEP. This is an all-band HF vertical antenna for amateur ham radio. If you are going to ground-mount a 1/4w vertical, then the radials do not have to be tuned [cut for band] but should be high in number (32-64 a 1/4w in length for the lowest bands you'll be operating). Common Mode RF Chokes For The Ham Radio HF Antenna. With one radial the antenna is no longer omnidirectional, the side with no radial is down by 4 d, that energy now appears at high elevation angles on the radial side and can be advantageous for close in contacts (0 to 400 miles). 25 wl radials work very well. 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. The radials contribute to the radiation efficiency of the entire vertical antenna system. 2 wavelength at the lowest frequency that you wish to operate. Vertical Antenna Ground Systems At HF Rudy Severns N6LF Introduction In any case it is strictly valid only for the case of no radials. I use a variety of SLA batteries and take 100ft of RG8x and/or 80ft of LMR400 for feedlines, both fit in the tub of antenna stuff. No Radials for Higher Performance, Lower Angles, Lower Noise and Lower Loss, for DX 80-6M. SKU: AV-18VS Hy-Gain. This creates a matched antenna, with a quarter wave as the radiator and a quarter wave as the ground. 20 foot hoa 6-20 meter no radial multiband foldover vertical antenna with unun view details; 27 foot hoa 10-40 meter no radial multiband foldover vertical antenna with unun view details; 33 foot 10-80 meter multiband foldover vertical antenna with unun view details; 43 foot 10-160 meter multiband foldover vertical antenna with unun view details. Elevated radials should be electrically 0. Heavy gauge aluminum with stainless steel hardware construction throughout. 10 Best HF Vertical Antenna Review in 2020 – Top Picks of Multi Band HF Antennas (No Radials, Tuning or Adjustments!) Whether you are a radio enthusiast and want the perfect antenna for recreation purposes or you are looking for the ideal piece for your amateur station, you deserve the ideal vertical antenna. Smarter, stronger and more elegant all-band ham radio antenna option. One half of the dipole is the IMax-2000, and the other half is your feedline. The shift in resonance for radials close to ground has also been demonstrated experimentally[2]. The use of aluminum and stainless steel hardware keeps the antenna's overall weight down to around 75 pounds. It is a resonant Half wave on 80m (3. OCF HF Vertical Dipole Higher performance, HF Multiband DX Flagpole Antenna covering 3. 2 feet long), made of solid silver rod, in the middle of the roof of an average vehicle, the efficiency would barely meet 90%. 2 MHz! As λ 5Figurepredicts the effect gets much larger for small values of J. I plan on installing a vertical antenna soon. I started by simply planting the antenna on a ground rod:. Nice shiney aluminum standing tall, and that's it. base insulator and a 1-1/4 in. Cushcraft R9 covers 6,10,12,15,17,20,30,40,80 Meters • NO GROUND SYSTEM OR RADIALS NEEDED • RUGGED CONSTRUCTION • INSTANT BAND CHANGING. The antenna is easy to install but does not resonate on amateur bands as described without the use of radials. The reason for this has to do mainly with FCC rules, which largely. The resonate frequency lowered a bit. No Radials for Higher Performance Lower Angles, Lower Noise and Lower Loss, for all frequencies 160-6M. A Ground Plane antenna's radials are provided in pairs and are slightly longer( 5-10%) than the radiator. This can result in very unpredictable results. It handles up to 250W PEP SSB Power. The Isotron Antenna. I carried out a survey in early 2014 to try to discover which portable HF antenna was most popular. 61 or Lower on All Bands! Fits Optional Mast Pipes Between 1-2 Inch Diameter. Portable antennas - radials vs. Being inexpensive, probably it is one of the best choices. Again, The HF-360 is a "radial free" vertical antenna, and it comes in 4 parts. Elevated radials should be at least 0. With no radials the 7. on the 20 m band this antenna 6m high must be completed with a 5. My neighbors wouldn’t have a clue. Base Antenna GPA-80 HF Vertical 80-6M No Gaps No Radials & Perfect SWR With ATU. The Isotron Antenna. HFLINK is the international resource for ALE Automatic Link Establishment High Frequency Communications, HF Digital Messaging, Emergency / Disaster Relief, Interoperative HF Communications, HF Network, Ham Radio. My antenna supported in it's wooden box, ready for portable operation. With any vertical antenna system, the radials are the second half of the antenna. You can secure the wires under the corner of the shingles or stick them down using a silicone caulk so they will not move in the wind. The reason for this has to do mainly with FCC rules, which largely. My question is this: just how important is a choke balun when using a ground-mounted HF (for 40M) quarter-wave vertical antenna with 32 quarter-wave buried radials?. Base Antenna GPA-80 HF Vertical 80-6M No Gaps No Radials & Perfect SWR With ATU. Even the so-called no-radial verticals have a counterpoise or "something" and some have elevated radials built in to the design and they just pretend that they don't have radials. Horizontal HF antennas … benefit from nearby ground gain. There is no "good" HF vertical that doesn't have something to balance the vertical part of the antenna. Say you have 500-feet of wire to use for radials for your new 40m vertical. Low SWR is due to MFJ s exclusive Spider-MatchTM broadband network. No Radials for Higher Performance Lower Angles, Lower Noise and Lower Loss, for all frequencies 160-6M. An HF vertical dipole for all frequencies 1. The antenna is rated at 300 watts side band.