80m rotatable dipole

Last UpdatedMarch 5, 2024

If you wnat to use a larger mast, simply use a larger U-bolt and lengthen the bracket to fit. (pictured below) (Image/DIEX Antennas) Multi-Band HF Trap Shortened Rigid Rotatable Dipole Kits. All 12 configurations have roughly the same total cost for the aluminum tubing. Get a strong, clear signal with less noise from 2 meters through 40 meters with your choice of single- and multi-band Yagi antennas with up to 16 elements. Over 2. 45 feet long. The traps themselves will shorten the amount of wire necessary to achieve resonance at 160m, similarly to a loading coil. 24-thread whips and you'll have an instant dipole! These mounts fit masts up to 1. ALL VIDEOS. The wire from each leg of the dipole is inside each windsock pole. 73. Use MFJ-347 Mini Dipole Mounts to build your own single-band mini dipole using two HF (or 6-meter) mobile whips! Just add a couple of 3/8 in. 0m), Kit Part Number: DXA-DXA1080 Not Yet Reviewed A Truly Broadband, Efficient Low Band Dipole - 2 - W7ZZ and N6RY, c. 1 x 0. The "Slick Six" 6 meter dipole can be supported from good solid PVC pipe at the. In stock, shipped in 1 to 2 days. Typical setup time is about 10 minutes. Frequency: 28, 21, 14 MHz. 8 MHz, 300W PEP Max, 100W Dig. The antenna is highly configurable, and, with the 80 Meter Coil, covers all the Amateur bands from 80M to 10M (as well as most frequencies in between). Description. 1m wide. MSRP: 79. 5-70. If the wire is to be inside the fiberglass, the velocity factor is slightly less than 90%. Description: The MFJ-17758 is a two band, 80- and 40-Meter center-fed dipole antenna capable of handling 1500 watts. 5 MHz. Feb 1, 2015 · So, an 80/160m trapped dipole will be an 80m dipole, with traps at the end of that, with additional wire to resonate it at 160m. Troublefree, and absolutely performs when I make a call. Review Summary For : MFJ-17758 80/40 Meter Dipole Antenna. 9 meters wire at its end. Each side of the dipole is broken up by a coil that presents a high impedance at 40 meters and acts as a loading May 16, 2010 · Array solutions 80 metere rotatable dipole at 2010 Dayton Hamvention. Performance There appears to be little measurable on-the-air difference between this short-ened dipole and a full-sized dipole. 5m), Kit. The antenna is completely mounted and equipped with a socket SO239 on the balun for the Oct 15, 2020 · The basic formula for dipole construction is dividing 468 by the desired resonant frequency, in MHz. Crafted with precision in Brazil using quality Description. 1. Secure it using machine screws (123), lock washers (10) and nuts (11) (fig. I used 5/16" double braid Dacron/Polyester rope for the truss supports. Indoor antenna de F6CYV. 7 feet in length. 75m is p/n MFJ-2275 and includes two MFJ-1675T Mobile Ham-tenna (TM) whips. Sales price without tax: £249. KC7PGU. All can be turned to null out noise and QRM, and to optimize the radiation pattern. 10N6RDB Antenna In the pictures the bottom horizontal Aluminum tubing is a half-wave dipole tuned to 10 Meters that is all set to be fed with your 50 ohm coax. (15. View Specs. Description: Antenna LTE, Ultra Wide band Terminal Antenna, SMA-M connector. ⑤HFV8040 is a V type dipole antenna (90 degree fixing). Building a dipole that covers more than about 200 kHz of the band with a low SWR requires some different techniques than we might use on other bands. Disgruntled, for the following weekend's SCC RTTY contest I vowed MFJ 80/40/20 Meter Rotatable Dipole. Each rotatable dipole was assembled, and temporarily affixed to a fiberglass push up mas (w hich hols my active receive-only loop antenna) and was tested and adjusted for best SWR. Span approx. 1) Insert the 5” (12. For cellular routers using LTE technology Frequency range 698-960 MHz, 1710-2170 MHz, 2500-2700 MHz High 3 days ago · Rotatable Dipole Antenna, Coil Shortened 80m and Full Size 10m, Tunable 3. 6:1 from 7. com/playlist?list=PLcC64tNkZB7zFt6NV9fnnd Find Diex Antennas Multi-Band Trap Shortened Rigid Rotatable Dipoles and get Free Shipping on Most Orders Over $99 at DX Engineering! Diex Antennas Multi-Band Trap Shortened Rigid Rotatable Dipoles offer high performance multi-band HF operations, and they are an excellent choice where there's not enough space for a full-size dipole or Yagi. 88=30. MSRP: 260. Special Order. Antenna, 80MDY1S, Rotatable Dipole, 80 meters, 80m, 1 Element, 57. Ultrabeam UB-8060 Rotary Dipole 80/60/40m. This is a 6" x 6" x 1/4" aluminum truss plate. Jun 11, 2024 · An Extremely Portable, Ultralight, Complete 80M Multi-band OCF Dipole for QRP, Portable, Stealth, POTA, SOTA and Base Operations. BUY. Short 85 foot long dual band 80/40 Meter dipole antenna is full-size on 40 Meters and has ultra-efficient end-loading on 80 Meters. 4. 50 – 4. Note: two antennas are required for some products. A Short 40 Antenna You Can Build for $50 or Less. 6 meters or 57. Lossfree shortening of the element by software designed and absolutely unique high Q coils and a likewise software designed high efficient end loading. 9 ft. 60 meter (58 feet). My 80 m short (vertical) dipole with center -loading is described on this page . ・Instruction for use Impedance of HF dipole antenna Jun 9, 2020 · An Inverted V antenna is a very popular variant of the standard horizontal dipole. This 80 meter SSB and CW Rotatable Dipole is a heavy-duty single element that is only 17. 2MHz, this is not a characteristic that most ‘short’ dipoles provide. ELEMENT ASSEMBLY. Includes an MFJ-347 isolated mini-dipole mount and two HF sticks of your band choice; ie. Works very well, but you’ll need a rotator to take advantage. Com-puter modeling indicates less than 1 dB difference also. The original KGD-80 design is as follows: dipole legs: 160 cm each (5 ft 3"), 20 mm (≈3/4") diameter aluminium tubing. Reviews: 13 MSRP: 525; Description: High efficient 40 meters shortened rotatable dipole, almost lossfree due to the "OptiBeam Air Coil" specially designed for this antenna. 7cm) fiberglass insulator into the drilled end of EA. center using u-bolts fastened over the pipe thru the center insulator or you could use metal pipe and adjust the length I'm often asked how to make a dipole. Nov 14, 2022 · In this video I show how to make a Inverted U rotatable dipole antenna that is multibanded. Sales price without tax£249. 5:1 SWR • Since the radiation pattern of a dipole is to its sides, the dipole is able to enhance or decrease a signal Building a 6m Rotatable Dipole This view is looking down on an Trapped dipole for 40-80-160 meters. Two 1/4 wave ham sticks in a dipole Jacob Tennant - K8JWT/AG. 9 feet total length. OptiBeam OB1-40 Rotary Dipole 40m. IMPORTANT Note that at my QTH, the installation height of dipoles is basically limited to 2 m (6 ft). 7-strand, #14 gauge hard copper antenna wire. It is made with very high quality materials and the. The 6 meter dipole can be designed for any portion of the 6 meter band you desire using the formula. Like the Cushcraft D4, these are rigid antennas constructed with aluminum tubing. 0 MHz. 5 MHz to 4 MHz. W3DZZ 80m/40m (34m/1kW) Trapped Dipole Antenna, Slightly shortened trap dipole for the classic bands 80 m and 40 m. See full list on static. 7 ft. 5. In his article, I will try to bust some of the myths associated with Inverted V and dipoles. 09 meters (49' 6") Wind Area 3. This is an antenna design from W4RNL L. 2001-11-30. Fed through a high quality Array Solutions 5 KW 1:2 balun. InnovAntennas DXC-140 40 Meter Rotatable Dipole covers the entire 40 meter band with particularly good efficiency and impressive SWR bandwidth with a very reasonable wingspan, just over 39 feet (12m). Update on 3/9/24 — still amazed at this rotatable dipole. Introduction. The entire antenna length is used on all three bands. 05 λ. Beli Rotary Dipole 40m 80m Rotari Dipole Dual Band Rotatable Antenna Antena di JUAL PEMANCAR FM DAN TV. 2015 Fig 1. 2x8. One of the big advantages to a hamstick dipole is how easily it takes down for transport and storage. Part Number: IVA-DXC-140. 3MHz and better than 1. 95. ( 1 ) Estimated Ship Date: Aug 26, 2024 (if ordered today) Free Shipping. May 2, 2020 · This includes segments of 1-1/2" mast with a swaged end. 0 mhz The SWR bandwidth is 1. 0MHz, 1000W PEP, 50. As an example, a dipole cut for 14. In this video I use materials on hand to build a 40-meter amateur radio dipole. 80-1S EAN-R2010708. 8′ 1″ OD fiberglass tubing, boom (MGS) 4. Powe Rating Watts PEP (CW): 1500 (500) The World Ranger Dipole gives bi-directional patterns and rotatable convenience. The unparalleled performance of a Off-Center Fed Dipole fits literally in the palm of your hand No Balun. 0 out of 5 stars Smaller and lighter version of the Delta-7B HF/50MHz multiband antenna, ideal for portable operation. DIEX Multi-Band Trap Shortened Rigid Rotatable Dipoles offer high performance multi-band HF operations. With the included OptiBeam Multi-Switch System, this antenna offers a 2:1 SWR bandwith over four separate 70 kHz preset sections of the 80/75 meter band, each Antenna, 80MDY1S, Rotatable Dipole, 80 meters, 80m, 1 Element, 57. Product is in production. Reviews: 9. 50. This antenna covers the whole range at less than 1. Part Number: EAN-R2010708 4. The minimum installation height of a horizontal dipole is often stated as about 0. Element Material, North American Aircraft Grade Aluminum. 88, so 35. 3 days ago · Rotatable Dipole Antenna, Coil Shortened 80m and Full Size 10m, Tunable 3. When used as V type, ready to transmit from low position of 3m high from the ground. HF Single Element Rotatable Dipole, 40 Meter Band. EAntenna HF Rotatable Antennas 17804. Figure 7 is a photo of the antenna at 40 feet. Dipole multiband trapped 10-15-20-40m, in V-shaped configuration, omnidirectional. Sales price: £299. 4m long (about 40 feet). The JK401 is a simple Hi-Q coil loaded rotatable dipole, with a small footprint as well giving great performance on 40M. For example, an 80 meter dipole cut according to the formula, hung at 80 feet and 40m/80m Portable antenna. Antennas - 4G LTE / 3G / 2G Ultra Wideband Antenna, SMA-M -- BB-2JW0124Z-C868B. More videos:https://youtube. 0 – 29. 5, 2000W. Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. contact with the wire. Review Summary For : Cushcraft D40. GT 4-050 1/2″ Guy Ties, for tips of spreaders (RFJ) 5. Add to Cart. The hamsticks have a four foot long coil section and a four foot long whip. EZNEC models of dipoles from the standard formula, fed directly with 50 ohm coax (blue line) or series matched (purple line). ④HFV8040 can be used at 3. It is made with very high quality materials and the best in Sep 21, 2017 · Cushcraft D-3 Tri-Band 10/15/20M Rotatable Dipole Antenna. 11B. 34 m. However, the non-resonant variety is Review Summary For : MFJ-2275 Single-band Rotatable mini-Dipole. in diameter. Divide 32. See Figure 6. Lay out the element pieces for your rotatable dipole. Callum. (F-12 markets such yagis). The Buddipole™ - HF portable dipole antenna system, Welcome to the home of the Buddipole™, an hf/vhf portable dipole antenna system which is designed to be modular, versatile, and efficient. You can mount them high and away from the trees for better performance than a wire dipole. Build a space efficient trapped dipole antenna for 40-80-160 meter bands using RG-58 and PVC pipe by W8NX. 5-3. Super-strong injection-molded center insulator with built-in SO-239 connector and hang hole. B Cebik (SK). The XR5-JK is a direct 50-ohm 3 days ago · Find MFJ Rotatable Dipoles and get Free Shipping on Most Orders Over $99 at DX Engineering! MFJ Rotatable Dipoles are high-efficiency rotatable antennas that are inconspicuous and super-low profile they are almost invisible from across the street! With their small turning radius and tiny weight, they fit on even small roofs and are perfect for townhouses, apartments, and condos. ③To adjust the frequencies is possible to change the hats and places. incl. CONSTRUCTION AND INSTALLATION. $995. 5 : 1 SWR (depending on the height above ground). Cebik design The JK401 is a simple Hi-Q coil loaded rotatable dipole, with a small footprint as well giving great performance on 40M. 2 KW pepArm length: 6m, 4m arm projection on the groundMount on masts from 40 to 50mm OD, 60mm optional. That was using a two-element wire yagi (inverted-V elements) up nearly 70'. DXD-120 20m rotating dipole 8. Heavy Duty High Q Coils designed to prevent interference with Yagi or Hex Beam on same tower. They feature special traps made with of PTFE (Teflon®) insulated coax for high Q and low losses, offer high performance multi-band operations—and are excellent shortened The surrounding ground clutter and variable terrain would have made vertical performance questionable. dipole antenna for 80m and 40m. $54691. Feed it with 50 ohm coaxial cable as usual. (6m. best in its class in the market in terms of mechanical construction Choose from top-brand HF Yagi, HEXX beam, and other rotatable antennas to meet your high-frequency needs. In the SARTG RTTY contest in mid-August 2006, my 40M performance was terrible -- just over 20 contacts. Balun and traps are weatherproof and sealed with plastic. No Balun. They feature heavy-duty, solid-aluminum construction for durability and corrosion resistance. 225 = 32. It is made with very high quality materials and the best in over 1. This antenna works great in 10-15-20-40 meters and with antena tunner it's work on 6-12-17-80 meters with good results when the propagation is well. Its total length is 85 feet. Weight 24. Part Number: DXA-DXM80 Not Yet Reviewed Example: To use this antenna from 80m to 10m, the feedline should be in odd 1/8-wavelength multiples on 80m. VK5AH -HF 4 Bander dipole. 17. Uses a Tornado tuner to cover the entire band from 3. MSRP: $49. You'll. Now you can operate the low bands on 80, 40, and 20 Meters with a true rotatable dipole that'll blend in with the sky! Take advantage of the excellent propagation of the low bands during the low sunspot cycle. Simple, Elegant, High Quality For Less. 85 ft. If 90 feet is needed to get to our operating position, the nearest odd multiple 1/8-wavelength length is 92. Easily covers entire band without tuner. 5 mhz to 4. Cushcraft World Ranger dipoles feature high performance traps, heavy-wall tubing, and Feb 12, 2012 · The Linear-Loaded "Crappie" 40M Rotatable Dipole. Just as a regular dipole may or may not always be of resonant 1/2λ length, an Inverted V too may not always be cut to resonance. 3cm) sleeve over the drilled end of EA (fig. Our feedline VF=0. 5:1 in 40 khz increments and 2. 8MHz / 7-7. This unique design places full size elements along the boom in the same plane and produces amazing 2 element monobander performance on all 5 bands. Originally designed by radio pioneer Heinrich Hertz in 1886, the dipole antenna was originally called the “Hertz” antenna. Therefore, 123/3. 2). Search this page. 12Kg weightBalun 1:1 optional 6m kit optional MONTSERRAT (VP2M) - 2012. May 5, 2023 · the original fan dipole; trap dipoles; off-center or end feeding; changing the effective dipole length; harmonic resonances. The DELTA C-140 is a rugged 40m rotating dipole which is just 39' (12m) wide - SERIOUS HD!! The Delta C-140 has a number of unique benefits. Find Kelemen Trap Dipole Antennas and get Free Shipping on Most Orders Over $99 at DX Engineering! Kelemen Trap Dipole Antennas are high-quality, heavy-duty pre-assembled wire antennas intended for permanent installations. DOMINICA (J38) - 2011. Description: Rotatable, lightweight, isolated mini-dipole. The antenna does not require guy wires. Buddies in the Caribbean 2011 Mini-DXpedition to Dominica Part 1. Tighten these firmly. Sep 7, 2021 · As a Rotatable Dipole Slide 6 • Is a horizontally mounted dipole that can be rotated in a circle • A dipole presents an impedance of ~73 Ohm, thus a 1. The size of a typical dipole is given approximately by 468/fMHz. 225 MHz SSB is 468/14. 2MHz. The MFJ-17758 is a two band, 80- and 40-Meter center-fed dipole antenna capable of handling 1500 watts. They make an excellent choice when there’s not enough space for a full-size dipole or Extenders are required for 12 , 15, and 20 meters. These Description: Extremely efficient trapless 80m rotary dipole with an element length of just 17. gross price. 4 Total Length, Each See More Specifications. Can be adapted to work on 160 meters by adding additional 6. 0MHz to 7. Having limited space led to the design of this multi-band antenna array, which has a foot print of approximately 15 feet. For the PAL-OCF8010 with 250 feet of RG213 feed line and an average height of 30 feet: Palomar Engineers PAL-OCF8010 Antenna manual 05242021 29. A dipole will present a low feedpoint impedance when each leg is close to an odd multiple of 1/4 wavelength. See what you think. Hamstick Dipole Fact Sheet. Find Cushcraft World Ranger Rotatable Dipole Antennas and get Free Shipping on Most Orders Over $99 at DX Engineering! Cushcraft World Ranger dipole antennas give bi-directional patterns and rotatable convenience. VAT, plus shipping €177. Good DX results have been experienced using the Force-12, EF-180B, 80m rotatable dipole at 100' so it was decided to design a 2 el 80m yagi around similar elements. com In IARU Region 2, the 80m band extends from 3. All Stainless Steel Fittings. Solderless , crimped construction. Specially The HFp design provides a highly efficient antenna design in an extremely portable package. MFJ 80/40/20 Meter Rotatable Dipole. A highly efficient yet very HD 20m/14MHz rotating dipole. The MFJ-1785 is constructed of 6063-T6 aircraft strength aluminum tubing with a solid center fiberglass insulator and handles 1500 Watts SSB/CW. The 80m band starts at 3. 4 Total Length, Each. 250 in. Review Summary For : JK Antennas JK801 Rotatable 80m Dipole; Reviews: 2 MSRP: $1999; Description: Very beefy 80m rotatable dipole. To 80m, the traps look like high impedances, effectively disconnecting the extra wire for 160m. Cushcraft D-4 Quad-Band 10/15/20/40M Rotatable Dipole Antenna | eBay . A CBL-2000, high power 2k/SSB balun, is included as a standard accessory, this also helps prevent TVI, BCI, and other possible sources of interference. Extremely low weight with high tensile strength due to use of highly flexible steel wire with plastic sheathing. dxengineering. Handles 1500 Watts. The Frequency Devices 10N6RDB take the half-wave dipole a step further by working on two bands with one feed line: The 10 Meter and 6 Meter ham Bands. This is the Spi-Ro LC-80 antenna shortener. 40m Rotatable dipole. Specification. 5 and 28. 5 lbs. Portable wire antenna for 40 and 80 meter made with a RF Chocke. 80-10 meter OCF antenna layout. Turning Radius, Stainless Steel Hardware, Each. M2 Antennas 10-15M1DX are adjustable, single-band HF dipole antennas designed with performance and affordability in mind without skimping on quality. Each side of the dipole is broken up by a coil that presents a high impedance at 40 meters and acts as a loading coil on 80 meters, allowing the antenna to resonate on 80 meters even though it is physically Comet H422 4 Band Rotary V Dipole antenna Newly designed High Power (1kw) 4-Band trap dipole antenna, . 0:1 in 80 khz increments. Length 15. Reviews: 1. Reviews: 13. 00. Apr 17, 2010 · V 80M antenna rotatable dipole. 0m), Kit Part Number: DXA-DXA1080 Not Yet Reviewed Figure 7— The K4VX 40-meter linear-loaded dipole deployed at 40 feet. I hung it on the antenna test rig I bui Rotary Dipole 40m 80m Rotari Dipole Dual Band Rotatable Antenna Antena di Tokopedia ∙ Promo Pengguna Baru ∙ Cicilan 0% ∙ Kurir Instan. This time in the form of a short, "hatted" 80m dipole: the KGD-80-FD Mk 2. GT 4-100 1″ Guy Ties, for tips of boom (RFJ) Extenders are required for 12 , 15, and 20 meters. 7 MHz. suggested height of at least 5m, but also works well up to 2m. For the PAL8010OCF, the impedance is very well behaved in a limited, easy to match range throughout the 1-54 MHz range and, in fact, that antenna also works very This is a 6" x 6" x 1/4" aluminum truss plate. A multiband 80-40-20-15 meters dipole wire antenna that can be extended to cover 160 meters too. (9. Inside the box is a 50 ohm 1:1 Balun. Supplier: Advantech. Have now confirmed 175 countries on 30m. A full legal limit efficient 80, 40, and 20-meter antenna that is shorter than a 20-meter dipole. M2 Antennas Rotatable Dipoles. Can be used both straight and /or V type. This rotatable dipole lets you focus your signal in the direction you want so you can work some real DX! Small, low profile, inconspicuous. Made by hams for hams in the USA. ②Compact, light weighted and very easy to assemble. There are several methods to shorten a mast-mounted rotatable dipole, including loading coils and capacity hats. InnovAntennas DXC-140 40 Meter Rotatable Dipole DXC-140. The full 80 Meter band is covered by the HFp in overlapping Jul 16, 2011 · antena hf dipole broadband - asli ( terjual ) antena hf rotatable dipole 80m dan 40m ( terjual b kabel heliex - andrew - ldf 2 dan 4 ( terjual semua ) yaesu vr 5000 - istimewa ( terjual semarang ) kabel andrew d 5 ( terjual brebes ) swr daiwa cn - 801 + jamper ( terjual ) ht icom 2 gxat - orisinil ( terjual tangerang ) May 25, 2021 · Comet H-422 and Diamond Antenna HFV-5 rotatable trapped dipole antennas can be used as a horizontal dipole or in a “V” formation to save space. Oct 15, 2020 · The World Ranger Dipole gives bi-directional patterns and rotatable convenience. This antenna is based on the classic Force 12 design and optimized with a single transmission line feed system. 7 feet The XR5-JK is a five band / Multiband Yagi that interlaces 10, 12, 15, 17 & 20 meters on a single boom. Or operate on multi-bands with compact rotatable dipole antennas or cutting-edge DX Review Summary For : OptiBeam OB1-40. To determine how much 1/4″ fiberglass to buy, you need to calculate the approximate length required for the dipole. After installing the antenna midway up a 45 foot Rohn galvanized steel mast braced against the rear deck, and further supported by 1/8 double braided Dacron guy ropes. Aug 22, 2022 · In April of 2014, I decided to give the KGD-80 another chance. Brand: Cushcraft. The legs of my dipole are made of aluminum tubing. 5=35. HF DualBand 2 Band 40m 80m 500 Watt Antena Orari Rapi 80/40 meter 80/40 Dual Band Rotary Dipole 500W This Antenna Has build in choke Balun and Coil for Shorting the element to elliminate any Reflect due to the Unmatch SWR. Power Rating 5k SSB. Mounted on each end of the 10 foot fiberglass pipe is a 32-foot fiberglass windsock pole. SKU 17826. 9 in half, and we see each element of this dipole needs to be 16. Review Summary For : OptiBeam OB1-40. Below is one example of how to build and mount a 40 meter loaded dipole using basic materials. €211. 6 sq ft. Rotatable Dipole Antenna, Coil Shortened 80m, Tunable 3. For the 80 mtr band, that is 4-5 m (13-16 ft). Product Information. I used this configuration to build my first antenna--two Hamsticks in the adapter, bolted to a 10' high piece of PVC, raised another 3 1/2 feet by putting it on top of a garbage can, and tying the pvc mast to a hook on the back of my patio roof. PY2ONU Rating: 2014-12-12; More or less Time Owned: 0 to 3 months. Description: Rotatable dipole, bandwidth 200kHz, SWR at resonance 1. HF Yagi, HEXX Beam and Rotatable Antennas (41) Wire Antennas (9) Antenna, 80MDY1S, Rotatable Dipole, 80 meters, 80m, 1 Element, 57. 71 ft. Rotatable, motor-tuned dual-band dipole with coverage of the COMPLETE 80m band, as well as Feb 29, 2024 · DXA-DXA1580: Coil-Shortened 80M, Full-Size 15M, 38. 2. First it covers the whole 40m band without an ATU with an SWR of less than 2:1 from 7. The loaded dipole opens up the options for many armature radio users faced with space constraints. The legs of this dipole are only 12. Thanks for an outstanding product Tom, Df2BO! Adding inductors to your dipole makes it possible to reduce the overall length of the antenna. OptiBeam OB1-80+ Shortened 80 meter Rotary Dipole SSB+CW. This is commonly used to operate 15m using a 40m dipole, or 10m using the 7th harmonic resonance with an 80m dipole. , 29. per 1/8-wavelength. 4 – 4. Because dipoles are directional, as seen in the “Dipole Radiation 3D Pattern” diagram, an antenna rotator is required for maximum antenna gain in a specific direction. 10 meters. Slide the 1 1⁄4” x 3 1⁄4” (3. This antenna is made for the Ham operator that ís looking for a compact dipole antenna to work on 40M. 52 ft. OptiBeam Antenna Technology has achieved directional antennas with extraordinary electrical properties, including the highest efficiency, optimum band coverage, nearly constant gain and unchanging radiation pattern across the band, and low SWR. Antenna, DXC-140, Rotating Dipole, 40m, 19. Each dipole leg comprises 5 aluminum tube sections, with decreasing diameter: 20-16-12-10-8 mm. ve sl sb nw et cd xs vn kp nz