This antenna is made for the Ham operator that ís looking for a compact dipole antenna to work on 40M. Inverted L 60m Band. This is the. ), gain of 0dBd and a power rating of 1200W SSB PEP. Get the Diamond HFV-8040 80/40m Vee dipole antenna from Nevada Radio, with cheap flat-rate delivery and rapid despatch. This antenna is a high performance, full size, full wave, 80m loop antenna. An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters John DeGood, NU3E [email protected] Trying to use the shortwave bands for ham radio usually end up in the need of space for large antennas. I know that 160 is tough and this antenna may not be the best but it's what I can do in my lot. We are going to use an 80 meter ½ wave dipole for this This can be done with a base fed vertical antenna, but is. They can be highly effective as well as portable. VK3IL Blog The wire was cut to 40m length and then trimmed when set up as an inverted V to minimise the. 5m long HyEndFed antenna were noticeable. The antenna dipole for the 160 - 80 - 40m band with frequency range from 1840kHz to 2000kHz, 3500kHz to 3800kHz, 7000kHz to 7200kHz with an overal lenght of 80 meters (~ 262ft) (arms length: 2x 40m/ 2x ~131ft. 51 – Short Dipole Antenna for 40m – 80m – 160m. 4 meters) leg, totaling 135 feet or 41 meters setup as T Top. Features Full band coverage for 80 and 40 meters Height is 32 feet Weight is only 13 pounds. Dual-band Loop Antenna for 30m - 40m 37 61. Antenna tuning is a bit challenging at times, but I can use 80, 40, 20, 15, and 10 meters without much difficulty. US Army, Marines, War Collectibles. • Radiating element will be a dipole that is ½ wavelength for the frequency. On 40m, the Front/Back is too low and on 160m the signals will be very weak. The antennas used for comparison in these evaluations were the 40M inverted vees. It also works fine on all bands above 40m with a tuner, and even below 40m on 60m, and 80m, although the coax losses will be higher. A Co-ax Trap Dipole For 40, 30 and 20 Meters – Or At Least That Was The Intention Recently, someone whose blog I follow mentioned that instead of waiting until a project is finished, he makes several mini-blogs about it, along the lines of “New Blog Post – Soldered All Resistors in New Radio!”, New Blog Post “Now I’ve Soldered All. They are full-size on 40-meters and employ ultra-efficient end-loading on 80-meters. length of dual wire‐stranded stereo speaker wire and. Total set-up time for the antenna and radio this second time was less than twenty minutes. There are three versions of this antenna available: a 41-ft. DUAL BAND DOUBLE BAZOOKA. A 50% NON-REFUNDABLE DEPOSIT IS REQUIRED. 73 - Curtain Zepp Antenna for 160m, 80m, 40m. These branches would make a suitable support for an 80-10 Meter half-wave doublet or flat-top dipole. Full band coverage can be accomplished with an antenna tuner. Can be adapted to work on 160 meters by adding additional 6. Shielded-Loop antennas have some nice properties that make them desirable as portable receiving antennas. However, we’re not building a 5-element monobander here. 80 and 160m. Sentinel HEX BEAM 20m Single Band Antenna; Sentinel Hex Beam 10m 6m Dual Band; Sentinel Hex Beam 10m Single Band HEX BEAM. This is the second antenna I purchased from them. Our Hy Power 40-meter off center fed antenna is made with the same material as our 80-meter off center fed antenna. 80/40 Meter Attic Antena I live in a tightly packed urban neighborhood without much room for antennas. I could only guess. Yagi Home Made Antennas. Place a 1:1 Balun on the Antenna end of the Feedline. The original was for 160 meters and I cannot say a bad word about the antenna. Use Unadilla's W2VS high performance traps to convert your single dipole into a tuned, multiband wire antenna. This was a spur of the moment project. 80/40m Trap Dipole (VE3NCQ, you're S9+20) Everybody who has heard me on 80m knows that I've been stuck using a compromised antenna for 80m. When used in the V configuration it can be mounted as low as 10ft above groud. Serious 160 M ops have a listening antenna focused on Europe: 45-60 Degrees. Start with cutting the radiating and reflecting elements. WHY USE A FULL WAVE HORIZONTAL LOOP INSTEAD OF A DIPOLE ON 160, 80, 75, 60 and 40 METERS? (Rev 6/2017) A dipole antenna just will not work unless it is at a sufficient height. The Wire Size can range from 16 AWG to 12 AWG. The antenna produced excellent signal levels using only the 10dB preamplifier built into my TS-590SG. I made this antenna up while camping near Lake Eyre. End-fed antennas at an affordable price. beams •Antenna is a square configuration with equal size. Antennas at this frequency are large: A quarter-wave vertical, for example, is approximately 65 feet (20 meters) high. A full wave loop, compressed in dimensions has much less than 1 dBd gain. After trimming the antenna to be resonant in the center of the 40m band, we found the final impedance to be around 80 ohms. Feed type (coax/open wire/what ever) 4. What is a magnetic loop? • Radio waves travel by a wave of electric and magnetic fields at 90 degrees to each other. antenna tunes the entire band with the help of an ATU. Manually trimming and tuning the elements to resonant frequencies on the bands they are cut for. Formula Dipole total Length = Amount / frequency Each leg of the dipole = Dipole Total Length / 2 Inverted Vees total length = ( Amount / Frequency ) * Percent Each leg of the Inverted Vee = Inverted Vees total length / 2 Where, Full Wave = 984 Half Wave = 468 Quarter Wave = 234 This tool will help you dynamically to calculate the total length of a dipole inverted V antenna. In the summer of 2010, I decided to construct a 1/4 wave 80 meter vertical using 3" OD Aluminum Tubing. 5 m between 20 m trap and 40 m trap and 11 m between the 40 m trap and the end of the antenna. have purchased an antenna capable of outstanding performancet Considering Ltg Bite, it is to a system that do effective job in the same space. Dual-Band Sloper Antenna 39 63. The over all length of the 40-meter off center fed antenna is 66 feet. DUAL BAND DOUBLE BAZOOKA. The 80 meter NVIS antenna consistently provides dependable communications from the northwest corner of Vermont to over a 350 - 400 mile RADIUS range, covering all of New England, down into Pennsylvania, and westward to the Niagra Falls area. When used in the V configuration it can be mounted as low as 10ft above groud. How to fit and fold an attic fan dipole? 80M, 40M, 20M, 10M Is it possible to wind some of the extra 80M Antenna on some PVC to create a coil, eating up some. For sale here is our End Fed Half Wave (EFHW) antenna for 10m-80m. This means that if the base wire of the antenna goes from north to south, the direction of gain will be east and west. optimum short-wave antennas computer-designed / computer-optimized developed by hams for hams 3 Bander 20-15-10 5el großer Duo Monobander 80 / 40m (full sized. 8 Mhz is weak signal reception. The tuning process is the same as for the 40/80 dipole, excpet the 20 m wires are trimmed first to an SWR of 1. 7 which is ok and 15. The larger the wire, the wider the bandwidth. Tillverkade av Alpha Delta i USA under många år. Hamstick dipole for 80m out mobile antennas improve. Only at eHam. If you want it to work properly, you will need a means of measuring SWR, some trial and error, a little patience and at least half-a-brain to build this. I installed the tuner at the feed point, hiding it behind the tree. us/contest-antennas/40-m. The classic Butternut HF2V vertical antenna operates on 80 and 40 meters. That is hardly high performance, and the stub destroys harmonic resonances that are normally useful in loops. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. Place a 1:1 Balun on the Antenna end of the Feedline. After trimming the antenna to be resonant in the center of the 40m band, we found the final impedance to be around 80 ohms. This means that if the base wire of the antenna goes from north to south, the direction of gain will be east and west. Sentinel Barrett HEX BEAM [Broadband] Antenna 40m, 20m,17m,15m,12m 160m, 80, +10m; Sentinel Barret 40m HEX BEAM Antenna 40m, 20m,17m,15m,12m. In the first couple hours of having it up I was able to hear stations I could not hear before. Installation The best location for this antenna is as high and far away as possible from utility wires, other antennas, and other structures. The four bands planned are 80 meters, 40 meters, 20 meters, and 10 meters. So what I've tried doing is using my 20 meter loop antenna as a receiving antenna for 75 meters. Our S lopers per - form beat when used with a ground-nounted tower with at least a tri-band beam on top, for *Top- " W 91 NN Slopers may be ground performance to t owe systems be enjoyed if ground system a o. 40m Dipole I was using a 40/80 trapped dipole but my neighborhood is very noisy on 80m so went back to the 40m dipole. Half-Sloper Antenna. Good idea? Ham Radio Antennas; How to build an Inverted L for the low-bands (40m, 80m and 160m). 200 5z4b kenya, africa 28. EFHW-8010P- 200W Portable or Stationary Multi-Band End Fed Half Wave Antenna This is a 200W version of popular EFHW-8010 End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. Here is my home HF antenna. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. 40mTHRU440 40m, 20, 10m, 6m, 2m and 440 MHz Antenna: 6M Veh 50-54 MHz Antenna: 6m/2m/440 6m, 2m and 440 MHz Antenna: 10m/2m/440 10m, 2m and 440 MHz Antenna: 20m/2m/440 20m, 2m and 440 MHz Antenna: HamR-8 75m, 40m, 20, 10m, 6m, 2m, 220 and 440 MHz Antenna: Cushcraft: Beam Antenna Chart & Index: Vertical Antenna Chart & Index: Diamond: A144-S5. It is [possible to add a 40M version of the 2-element half-log-cell antenna INSIDE the 75-80M. The antenna wire lengths before trimming are 5. - Uses elevated radials for higher gain. Our antenna doesn’t require a large expensive tower, many people are using inexpensive push up poles. A little while ago I picked up a 6 – 40M end-fed matchbox antenna from the Hawaii Emergency Amateur Radio Club, for field use. Order by Paypal. : 80 M Antennas. The four bands planned are 80 meters, 40 meters, 20 meters, and 10 meters. This antenna covers 65 kHz of 160 meters, 75 kHz of 80 meters and the entire 40-meter band with SWRs under 2:1. So, a good compromise for the new HF operator is a multiband antenna that allows operations on a couple of higher bands (perhaps 20-meters, 15-meters, and/or 10-meters), and operation on at least one lower band (perhaps 40-meters and/or 80-meters). My Loop Antenna November 20, 2013 2 Outline • Brief History • Characteristics of Small Loop Antennas for HF • My Loop for 40m –15m • Receive/Transmit Properties of Elect. How to fit and fold an attic fan dipole? 80M, 40M, 20M, 10M Is it possible to wind some of the extra 80M Antenna on some PVC to create a coil, eating up some. The stub in the top leg of the antenna opens the loop when operating on 40 meters and selected other bands. Only 27 feet tall and weighing in at less than nine pounds, it is small and light enough for one person to handle easily without assistance. It is also a directional antenna on the higher frequencies, which is an effective performer for those who live in antenna restricted communities. I've looked at it several times as I have studied to plan and build my own 80 meter OCF dipole. High gain fixed antenna for EOC, 12 db with ground level 1. )- PLEASE NOTE: Only order this option if it is being shipped outside the United States. My TX Antennae. Attached is a short article on this antenna that I've prepared. 200 rr9o novosibirsk russia 28. I got the antenna built and up today about 35 feet. This antenna is an excellent performer, and ruggedly built. Sometimes on 80 meters but there the 80 meters 2 * 20 meter dipole fed with open wire gave me more qso's. Suitcase DXPedition Antennas (part 1) – Verticals, a 40m and 80m journey October 16, 2019 W6PNG Suitcase DXPedition 4 comments Radios are irrefutably magic in that an unseen, unheard and untouchable to humans radio wave zips around and across the planet conveying music, voice and even web shopping pages. NW/SE Bobtail Curtain. Introduction. 80 m is 90 kHz Active element length on 80 & 40 meters is 32 feet Requires radial system Please - Read the entire manual to become familiar with the construction of the Butternut HF2V vertical antenna. You can use this as a review if you like. It can be fed with ladder line from the center insulator to tuner or it can use an impedance. 5m long and the 15. * = average gain over dipol in free-space / for comparison: 2 el monobander 4 dBd, 3 el 5-6 dBd ** = average gain at 20m above ground (= dBd + 2. SWR below 1. 5 across both bands. 10 shipping. It can be used as a rotatable or V type configuration. Due to the oversized packaging required, there is an additional $33. Home Made Antennas-JA1YPA Contest Club's Home Made Antennas-JA2JSF Mac's Home Made Antenna-JA5CJZ Aki's 4el. 25 meters) leg and a 90 foot (27. This manual does follow the 'classic' design and construction methods. SignaLoop™ Portable Ham/SWL/EMCOMM 3-19mhz 80-17m Magnetic Loop Antenna. They can be highly effective as well as portable. Start with cutting the radiating and reflecting elements. The antenna also needed to be capable of handling 50 watts at 100% duty cycle for digital operation as well as 100 watts of SSB. The antenna is modeled using. 10-80M Magnetic Alpha Loop Antenna, 100W 10-40M and 20W 40/60/80M. - Portable Vertical Antenna for 75m and 40m makes up a compact 28 feet high antenna. SPECIAL ORDER ITEMS ARE NOT REFUNDABLE. Because of the "shortening" effect of the series capacitor, the upper coil is required to bring the antenna back to 1/4 w/l resonance. 77 - Capacitance Loaded Vertical Antenna for 160m. Wire-Beam Antenna for 80m 38 62. The 40m 4-square was the first antenna built when I moved to this site. ncdxf/iaru international beacon network. 80-2m Portable Vertical Antenna. I intend to play with some BOG antennas this year. End loading, low-loss fiberglass form, high strength 6061 - T6 Aluminum tubing, handles 1500 Watts PEP, requires guying and radials counterpoises or ground screen. multiband antennas; one covering 80, 40, 20, 15 and 10 meters, and the other covering 80, 40, 17 Trap operation, all turns are used, in the con- ventional manner for a trap. A shortened multi-band End-Fed Half Wave (EFHW) antenna for 80-10m Steve Nichols G0KYA A shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1. The OCF40 covers five of the ham bands. I must mention that this noise problem only affects 40, 80 and 160 meter bands. how to build a dipole antena The simplest and easiest way to produce antenna for hf. Performance. • Increased vertical separation of elements you for optimal performance of 6-20 meters. N6BT has done repeated tests that show that a flat-top dipole mounted at the same height as the apex of an. UV insulated stranded wire. 73 - Curtain Zepp Antenna for 160m, 80m, 40m. Up to 40 meters it's possible to make these antennas rotatable looking at the size of the antennas (and my backyard). To find the half wave, divide that number by two. 80/40 Meter Attic Antena I live in a tightly packed urban neighborhood without much room for antennas. For sale here is our End Fed Half Wave (EFHW) antenna for 10m-80m. - A standard / remote tuner at the feedpoint will ease construction and allow operation from 3. This post relates to the design and build of a 160/80/40 Meter magnetic loop antenna. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. QRPGuys Portable 80/60m Vertical Antenna – $20 Your PayPal receipt is your confirmation that we have received your order. BY KD8OUT, Mike Kieffer. All of the right equipment and well trained installers made the difference!. 200 ve8at canada 28. This manual does follow the 'classic' design and construction methods. Seeing nice DX-stations on a cluster that you cant here frustrates HI. Inverted L60m band. 76 - Half Rhombic Unidirectional Vertical for 20m to 6m. Find more of what you love on eBay stores!. During the PACC 2013 I used this antenna for 160 meters. The loop was oriented with the main lobes pointed NE/SW, and the feedpoint was adjusted for lowest SWR (1:1) on 40m. Sure enough, many approaches, both old and new, exist to help an 80 or 75m dipole present a decent SWR across the entire 80m band. 10-80M Magnetic Alpha Loop Antenna, 100W 10-40M and 20W 40/60/80M. The extra length needed to make the antenna "work" on 80 Meters could be suspend from each branch, with most of the length going from tree to tree. It does this by virtue of chocke traps. The Cushcraft MA-8040V is small and lightweight yet efficient antenna for both 80 and 40m. Home Made Antennas-JA1YPA Contest Club's Home Made Antennas-JA2JSF Mac's Home Made Antenna-JA5CJZ Aki's 4el. How to build a monoband HF Vertical Quarter Wave Ham Radio Antenna; Is a Dipole better than a Cobweb Antenna? Ham Radio Aerials. Multi Band End Fed Antenna, covers 80/40/20/17/15/12/10m bands. RadioWavz Dipole antennas are the simplest practical antennas from a theoretical point of view; current amplitude on such an antenna decreases uniformly from the maximum at the center to zero at the ends. Volunteers of the Honolulu Emergency Amateur Radio Club (EARC) carefully assemble the 6-40 End Fed matchbox antennas for those who prefer not to build one. In the article below, I’d like to describe the theory and the mechanical build process for a 160m-long multiband loop antenna, including its support system, tuning, and SWR analysis. This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. The four bands planned are 80 meters, 40 meters, 20 meters, and 10 meters. When I raised the antenna and used a Rig Expert to tune the length I found the 40 m measurement was good for a less than 2:1 SWR across the phone portion of the band. Although this design has been around for a long time, it is only gaining popularity now due to the recent improvement in high power antenna tuners. Following the removal of the old wire verticals and several days of antenna building, the new 80 / 40m dual inverted-Vs were hoisted to the top of my 85' Balsam. This antenna covers 65 kHz of 160 meters, 75 kHz of 80 meters and the entire 40-meter band with SWRs under 2:1. The base of the antenna should be raised at least 8 feet to prevent RF burns. New Raymarine 3 To 4. Loop antennas have always fascinated me. 160m/80m Broadband Antenna by K5GP A presentation to CTDXCC September 22, 2008 The 160m/80m broadband antenna design objectives were to have: 160 and 80 m antennas since I had no antennas for these bands, the antennas had to be hidden because of covenant restrictions, open wire feeders would be too visible to be allowed,. Dodging AM heterodynes is what 40 meter Novice Operation is all about. The SuperLoop 40™ is a high performance, full size, full-wave, 40 meter loop antenna. Beverage 300m (80-40m) "Beverage" - The Ultimate Wire antenna. portable low power loop for travelling. Antennas are not the only thing that create improved scores. At the resonant frequency the two traps shows a high impedance, in series with the antenna wires, and very little RF energy goes past the trap. Only 27 feet tall and weighing in at less than nine pounds, it is small and light enough for one person to handle easily without assistance. There are three versions of this antenna available: a 41-ft. Highly unlikely, but a bad connection to an antenna wire can make things very noisy. 8:1, followed by the 40 m wires then the 80 m wires. I chose 58' for Mid 80 Meter Operation. This antenna covers 65 kHz of 160 meters, 75 kHz of 80 meters and the entire 40-meter band with SWRs under 2:1. 40 Meter SSB. G7FEK 80-40M SMALL GARDEN ANTENNA product reviews by real people like you. Optimize your performance on 80 & 40 meters. For best. 78 - Fan Dipole Antenna for 80m to 6m. I have over 15 antennas on the tower. 15 dB isotropic + about 5 dB ground reflection). A loop antenna is generally considered "small", if its circumference is less than 10% of the operating wavelength. Buxton, W8NX in QST July 1992 Issue. Antenna bibanda HF 80 - 40 m In mancanza di spazio adeguato è possibile usare questa antenna bibanda che può lavorare sugli 80 e 40 metri a mezz'onda piena, o. Each Mono GAP is rated to handle the legal power limit and provide continuous coverage under 2:1 across the entire specified band. The smallest antenna described for 80 metres was a magnetic loop. No long counterpoise, radials or feedline required. A lightweight, high performance, extremely portable vertical antenna rated at 1500 watts key-down with fully manual operation (no electrical power or controller required). If the ground is not very conductive add supplementary radial insulated wires on the ground to act as a counterpoise. The diagrams below show the patterns for 40m, 80m and 160m. 76 - Half Rhombic Unidirectional Vertical for 20m to 6m. 5 mtrs (≈ 8. 80m Wideband Dipole Antenna Requirements. Listening antennas for Asia and Pacific Needed!. Can be adapted to work on 160 meters by adding additional 6. Half-Sloper Antenna. I do not have an antenna for 160 but do listen from time to time. Below the antenna used during the PACC 2013. Higher or lower seems to work best. 200 vk6rbp australia 28. long, dual band resonant dipole antennas. 4 meters) leg, totaling 135 feet or 41 meters setup as T Top. I know that 160 is tough and this antenna may not be the best but it's what I can do in my lot. The length is not critical, as long as it is at least 1/8 wavelength long on the lowest band. QRPGuys Portable 80/60m Vertical Antenna - $20 Your PayPal receipt is your confirmation that we have received your order. This is the price paid for multiband coverage and physical short- ening. Doublet and long wire antennas are no longer effective due to. The HAMinator 10-80 - Rotating Dipole Kit with Antennas, Mount and 25' of RG-8X Coaxial Cable Provides all you need AND Saves you money!! Kit Includes: 10 - ProComm PCF Series Fiberglass "Stick" Antennas (2 each for 10m, 15m, 20m, 40m, 75m) 1 - K1DMOUNT1 Dipole Mount 1 - 25ft RG-8X Coaxial Cable Assembly with PL-259 connectors installed. 8 Mhz is weak signal reception. 5' per side. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. Dave Hollander N7RK. Inverted-V Beam Antenna for 30m 40 64. VK3IL Blog The wire was cut to 40m length and then trimmed when set up as an inverted V to minimise the. I had an A/B antenna switch in the. The rhombic antenna is often claimed to be an exceptionally good antenna with very high gain. I decided to install an 40 meter dipole in my attic space which is about 25 by 45 feet, and about 25 feet up from the ground. The antenna that most suited this application was a 40m band sloper as the guy wire to be used was slightly longer than a 1/4 wave length at 7 MHz and the top fed sloper was the most convenient installation having the least impact on the guy wire primary role; guying the tower. 2MHz) and resonant at 3. Wire-Beam Antenna for 80m 38 62. The basic antenna consists of an Inverted V connected to a. The original design is from Harry Lythall, SM0VPO (ref. What is a magnetic loop? • Radio waves travel by a wave of electric and magnetic fields at 90 degrees to each other. The OCF40 covers five of the ham bands. Manufacturers of High Quality Amateur Radio / Ham Radio HF Yagi, Transmitting and Receiving Antennas. As a result the antenna 'looks' electrically shorter than it really is. In this case I cut a 33. Following the removal of the old wire verticals and several days of antenna building, the new 80 / 40m dual inverted-Vs were hoisted to the top of my 85' Balsam. NON-STOCK ITEM. Part # MFJ-17758 Manufacturer MFJ. With a little adjusting of the ends I have better results than I expected. • Our regular antennas work by "recieving" the electric field portion of the radio wave. Follow us on Facebook KENWOOD TMD710GA APRS Mobile $528. All orders that are received before Sunday are shipped the following Saturday. This 40 and 80 meter inverted V antenna is made with loading coils. The Isotron Antenna. One of these was the one for the CW station. The antenna is fed about 23 feet in from one end of the antenna. The dual dipole wires do the job of providing guying support for the mast. HyEndFedAntenna. GB3DZZ 80-40m 34m 500 W GROUND ROD L Antennas Available €8. Antenna Width: 66. SPECIAL ORDER ITEMS ARE NOT REFUNDABLE. (03/03/1998) An article by Charlie Lofgren, W6JJZ, from QRP-L analyzing the W3EDP antenna. 80M,40m,20m,10m. So what I've tried doing is using my 20 meter loop antenna as a receiving antenna for 75 meters. horizontal : 3. Using the W7FG Open Wire Fed True Ladder Line Multi-Band Dipole Is Easy! Why use an open-wire fed doublet? Quite simply, they are efficient, broadband, easily tuned with a balanced input tuner, nearly unaffected by rain, easy to erect, stay up, and remain "trouble free" for years. Note: As any novice knows, the 40 meter novice band has always been shared with international SW broadcast. This antenna is an excellent performer, and ruggedly built. 200 5z4b kenya, africa 28. -Small Loops • Loop Equations • Measuring Efficiency of a Loop or Vertical Antenna • Evaluation of My Loop –Comparison to Verticals • Conclusions -References. Output from a BOG antenna is lower, so using a receive preamp with it is necessary. Not really great on 40, good on a small segment of 80 and great on 10/15/20/30/60 (add-on kit) and 17 (my own add-on). The 40M Extended Double Zepp By Jim Streible, K4DLI There were many new and somewhat unfamiliar antennas used at this year’s NFARL Field Day. 300m long wire rotatable This Beverage antenna is a straight wire about 1000 feet long and about 8. At the shack end, a control box is fed with band-decode information from the Ameritron RCS-12c - and automatically selects the antenna based on the rig's current band selection. The antenna's bottom wire element is about 10 ft above the ground and the bottom corners are anchored to the ground via Dacron guy ropes. The four bands planned are 80 meters, 40 meters, 20 meters, and 10 meters. It looked interesting so I bought a second hand EH Venus and stuck it at the end of the garden about 4 feet above ground level. Dual Band Vertical 80-40. The World Ranger Dipole gives bi-directional patterns and rotatable convenience. This Antenna design was one that I used about 4 years ago, it worked exceptionally well on 80m and 40m. Test Results for the Sloper vs Inverted-V Dipole on 80/40 meters Slopers are generally known to be good low angle DX antennas, while the inverted-V dipole is generally known to respond to higher angle, regional type signals. Gets worse below 7300. This antenna is made for the Ham operator that ís looking for a compact dipole antenna to work on 40M. The size of the antenna makes a Half wave length on 80 meters, and with the traps a half wave on 40m with a SWR (standing wave ratio) of 1:1-1. QRPGuys Portable 80/60m Vertical Antenna – $20 Your PayPal receipt is your confirmation that we have received your order. He commented to me that, even if a loop is only 10% efficient, that is only down 10 dB - about 1 1/2 S units. Vertical Antenna 160-80-40m to OK2FJ, rod 7m with glass fiber wound with 2. 06 (> 30dB). Gets fuller at harmonics Gets higher at harmonics. 7: 1, which is a little high, but I use a Tuner to make the amplifier happy!. The Top five list contains a few antennas that if you have the room for them perform very well. EndFed 1/2 Wave 800W 80M-10M Wire Antenna EndFed 1/2 Wave 800W 80M-10M Wire Antenna FULL HF Coverage, no tuner needed on most frequencies. (03/07/1998). The antenna that most suited this application was a 40m band sloper as the guy wire to be used was slightly longer than a 1/4 wave length at 7 MHz and the top fed sloper was the most convenient installation having the least impact on the guy wire primary role; guying the tower. Obviously, the radial system must be improved. Antennas are not the only thing that create improved scores. Double Extended Zepp NVIS Antenna Calculator. Dual Band Vertical 80-40. On 40 meters the SuperLoop 80™ is a 2 wavelength open loop or Bi-Square. 80 m is 90 kHz Active element length on 80 & 40 meters is 32 feet Requires radial system Please - Read the entire manual to become familiar with the construction of the Butternut HF2V vertical antenna. Highly unlikely, but a bad connection to an antenna wire can make things very noisy. The measurements below are for building a Double Extended Zepp Near Vertical Incident Skywave (NVIS) Antenna. Introduction. The Wire Size can range from 16 AWG to 12 AWG. Adding a Director to a ¼ wave 40M HF vertical antenna. Yagi Home Made Antennas. For now on I was working with a dipole at 6m AGL. It was quick and easy to use an elevated radial system (pictured at right). 6 kg : Polarization. You will get losses by using coax with an antenna that is presenting a higher SWR than is desirable, but as long as the coax isn't too long it shouldn't be too bad. The Comet H-422 is a 4-Band (10/15/20/40m) rotatable dipole antenna. dipole at 18' over normal ground Turning to my trusty ^antenna bible, the ARRL Antenna ook [7], I found the following: Practical Suggestions for Vertical Ground Systems At least 16 radials should be used if at all possible. , extreme low or high impedances) at the tuner end, on all bands. I ran across this design and thought I could build it for another section of 80 and 40 and I'd have 160 as a bonus. how to build a dipole antena The simplest and easiest way to produce antenna for hf. If you listen to the DX activity on the Low bands, you'd be forgiven for thinking that you're wasting your time unless you have a 4 Square Array, 20 acres of Beverage antennae, a huge Amplifier, and a neck like an anvil. Antennas 101 Presented by: KZ2I TA-33 with 40m dipole and 17/12 m add-on K4MQG 80 and 40 m beams at 135 and 120 feet. I just worked California on CW on 20M.