80 40 20 Meter Trap Dipole


For 20 meters the coil self-resonates and presents a high impedance which shortens the wire to a 20 meter dipole. 1 dBi in free space, but it has this gain only in one ham band. the center of the dipole and. The last weeks it was on a trap-dipole for 40 and 80 meter. Of course you can get lucky and make as high as 75% efficiency with a sweet length of feed line. Its ends can be bent to accommodate unusual spaces. 20 meters may be slightly higher but hopefully below 1. Cheers Max. Notable, a commercial 40-80 dual band dipole. The SWR is less than 1. The main category is Dipole antenna projects for 20 meters that is about Dipole antennas for 20 meter band. Sometimes on 80 meters but there the 80 meters 2 * 20 meter dipole fed with open wire gave me more qso’s. The plan is to make a. The capacitor does not adversely affect SWR when left in line to 40, 20, 17, 12, & 10-meters. W3DZZ Antenna: Modification by UR0GT. All that is necessary is to assemble the pieces and hang it up!. Butternut 80/40 Vertical Dipole Averaged S-Units By Band 80 Meters 40 Meters 20 Meters ~$350 10 9. Build a Space-Efficient dipole Antenna for 40, 80, and 160 Meters (570,975 bytes, PDF file) QST July 1992, pp. One of the aims of DXers is long distance contacts and they will often go to great lengths to have a low angle of radiation. 80 Meter CW 201. on 20 through 10 meters But for DXing, 160 through 40 meters a vertical can do a good job compared to a low dipole -since it’s more difficult to get a dipole up at a good height. 8mhz) is about 38. The past couple of days I've been reviewing literature on trap dipoles. HamCity has more than 30 years of experience in the amateur radio equipment business! Please visit us today for all your ham radio needs!. N6BT has done repeated tests that show that a flat-top dipole mounted at the same height as the apex of an. It is a heavy duty QRP/Low Power antenna that uses #14 wire instead of the usual #16 wire used by our other QRP/Low power models. Loading caused by the traps causes a reduced bandwidth for any trap dipole compared to a half-wave dipole. 8 ZS6BKW Dipole (94 ft) 10 9. Let me show you some interesting data. Buxton, W8NX in QST July 1992 Issue. The text below actually applies to any short dipole. I have also constructed the 20 meter version, just for fun, because 1) it is easy, 2) I was curious to see how well it performs, and 3) because I still had the coil core and coils of my first prototype 40 meter KGD. W4RZL also used a multiband scheme for 40 and 20 along with the 80 meter dipole. Posted by radiobekas at 6:23 AM 80 METER FRAME. 70 meters and yes, too short. handbook, or maybe even the web site, they have a dual band 80/40 meter dipole that uses loading coils instead of traps. Build a Space-Efficient dipole Antenna for 40, 80, and 160 Meters (570,975 bytes, PDF file) QST July 1992, pp. Trap resonance on the four bands is nonexistent. Its total length is 85 feet. Designed for horizontal or inverted "V" rated at legal power. That is, the two sections of the antenna are separated from each other by the trap. This antenna covers 65 kHz of 160 meters, 75 kHz of 80 meters and the entire 40-meter band with SWRs under 2:1. Going down the table to the 3 band section, we find wire lengths of 8'2" 22 '1 1 ", 24 '3 " under the 10, 40, and 80 meter headings, respective- From the dipole center to the I O meter trap (KW-10) is 8 2 From the 10 meter-trap to the 40 meter trap (KW-40) is 22 '1 1 ". 90 LARGE FLAT RATE BOX TO THE USA (MULTIPLE ANTENNA ORDERS), MEDIUM FLAT RATE BOX TO CANADA $42. BTW, the dipoles are in a sort of inverted V config. Use this indexed search to quickly find what you'd like to look at and then go purchase the scanned magazines (On CD, elsewhere, or occasionally from some generous download website) or look for the old paper magazine at used bookstores. Recently, members of Sacramento County ARES got together to build a 20/40 meter trap dipole antenna with a homemade balun. Two New Multiband Trap Dipoles QST August 1994, pp. I have since found a drawing for a 40/80/160m trapped dipole. An 80 meter dipole (3. Most signals are about 2 to 3 S units above my W9INN 20-40-80 meter dipole and the clarity is very close to the same, this antenna replaced a very good G5RV 10/80 meter dipole, that worked good on 75 meters but was down about about 3 S units from my W9INN dipole" —KB6HRT. Does anyone know if a fan type dipole in an inverted vee configuration can be made for 80, 40 and 30 meters? And, if so, how the addition of other bands affects the performance over a single dipole. 80/20 and 160/40 giving me 160, 80, 40, and 20 metres with only two dipoles (and no need for a tuner!). Ham Radio 40/80 Meter Inverted V Dipole Antenna Why Doesn't My New HF Trap Dipole Work?. I believe the 40 meter wider bandwidth is due to the coil on the end of the dipole antenna length for 40 meters, seeing a inductive reactance. As the fishing poles I had lying around were 8. Amateur Wire Antennas : Want to work DX with little space. Michael Zapf. 20,40 and even on the 80 meters band without the use of a tuner. Double Bazooka NVIS Antenna Calculator. An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters. Consequently the antenna between the traps became a full wave (FW) dipole on 20 m. I'm thinking the end points of the 20 are at a good enough distance from my roof but that the ends of the 40 meter one is too near. Thank you for visiting the web site of D r. The antenna system was my tried and true county hunting mobile array-a Hustler 54 inch mast topped with 20 and 40-meter resonators. The big advantage is that it can also work on part of the 80 meter band while remaining yard-sized. Outside arrays are disconnected and grounded when there is the slightest possibility of lightning. The traps are SpiRo model T-40. Thursday, December 3, 2009. “No-Trap” 40-20-15-10 meter dipole or inverted V. 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. So I'm considering a balun fed dipole that can be. N6BT has done repeated tests that show that a flat-top dipole mounted at the same height as the apex of an. Oh…you can use the 40-meter dipole on 15-meters without modification. Great for overall use, especially short range. So I wanted a self-supporting rotatable dipole for best performance on 12/17 meter as well. It's a great HF antenna for the ham radio operator with a smaller backyard! The. center fed dipole with no balun on 11meter band. AN MFJ-17758 80-and-40-meter TRAP DIPOLE IN THE ATTIC As the residence is on a 7000-foot (2133-meter) ridge, high winds and lightning are not uncommon. These antennas are broadband for ALE and do not require a tuner. Once the SWR is good for the 40 meter band, you can test 20, 15, 10 and 6 Meters. PKW M6 HF 3 30MHz DIPOLE ANTENNA 0 results. dipole, depending on how much extra length (with the 80m traps) I need to add to get it to resonate on 160m. This is especially true on 80 meters. BUILD THIS MULTIBAND FAN DIPOLE FOR ALL BAND HF ANTENNA EXCITEMENT Here is a fairly simple and easy to build multi band horizontal fan type dipole that can be constructed for all band operation from 160 meters up thru 6 meters or even higher. Coaxial Trap Dipole. Trap dipole for 40 and 80 meter Published on September 16, 2019 September 16, 2019 by pa1ejo A dipole is resonant on one frequency (and all odd harmonics), with a trap you can design it for more frequencies. 26-29 W8NX details a new coax trap design used in two multiband antennas; one covering 80, 40, 20, 15, and 10 meters, and the other covering 80, 40, 17, and 12 meters. HUSTLER RM-20 Standard Resonator, 20 METER 400 WATT FREE SHIP! AUTHORIZED DLR. The loss on 40 would essentially only be with the 40 traps, and even very poor traps would have less than 1 dB loss. You may also like. One segment is directed to the ground, the other one to your transceiver. Yommus, W2DMK. As with all trap dipoles, this one has less-than-ideal bandwidth due to the load- ing effect of the traps. Connected to the same feedpoint is the 20. 90 LARGE FLAT RATE BOX TO THE USA (MULTIPLE ANTENNA ORDERS), MEDIUM FLAT RATE BOX TO CANADA $42. Because the inductance in each trap reduces the physical length needed for resonance, the finished antenna will be shorter than a simple 1/2-l dipole. Overall length is 40 ft. Build an HF Ham Radio Dipole Antenna It is easy to build, construct and erect a dipole antenna for the HF bands: 160, 80, 40, 20, 15, 10 metres, etc using a few simple components at a minimal cost and get great results. The sample conventional 80/40-meter trap dipole in Figure 1 uses traps tuned to 6. Dipole Antenna Calculator. The 40 metre trap in clearer detail. This is especially true on 80 meters. DX-DD - “No-Trap” 80 and 40 meter dipole or inverted-V. MULTIBAND TRAP DIPOLE ANTENNA - (40,20,15,10M BANDS) * Simple and Low Cost* Resonant Antenna, no tuning required while changing bands* Short in length as compared to half-wave DipoleRequires careful fabrication & tuning of TRAPS( Only a few inches of RG58. We are proud to partner with the Yavapai County Jeep Posse. Dimensions guide. W3DZZ Antenna: Modification by UR0GT. 647 MHz) renders the dipole resonant on the 80 (actually 75) meter band, while resistor R has as sole function bleeding off static charges, hence protecting capacitor C. The tower on the right in the picture supports the antenna as described above. Thank you for visiting the web site of D r. 12 meters is like 1. Find great deals on eBay for 40m dipole. 90 LARGE FLAT RATE BOX TO THE USA (MULTIPLE ANTENNA ORDERS), MEDIUM FLAT RATE BOX TO CANADA $42. The antenna system was my tried and true county hunting mobile array-a Hustler 54 inch mast topped with 20 and 40-meter resonators. The performance is still good, so ideal if you have a small garden or want to try experimenting with bits of wire. At third, get a minimum SWR on 80 meters by length B. We also do 20/40/80 m, 80/160 m and 40. K6IF/W6BDN 40 Meter Rotatable Dipole. To this end Woody installed an MFJ-17758 80-40 meter trap dipole in the attic. Band switching is accomplished automatically through the use of two matched Hy-Gain 40-meter Hy-Q traps. Rig is an Elecraft K3; using Bencher paddles. I got the antenna built and up today about 35 feet. This tends to be a resonable compromise between trap loss and ease of antenna. There was a 10 meters low tree close to my balcony and something higher a bit further away. It not an apples to apples comparison, but I'm finding in most cases my 40 meter dipole at 15-20ft is the same or better than a 176ft doublet from in state to about 2 states out. I have since found a drawing for a 40/80/160m trapped dipole. 5 m between 20 m trap and 40 m trap and 11 m between the 40 m trap and the end of the antenna. This would allow me to work 30, 40 and 80 meters with an inverted vee that would easily fit within my backyard of our suburban lot. So what size would be worthy to try? Something 75 to 100 feet might be manageable. The W4RZL research showed 20 to 40 feet spacing at the dipole ends and different dipole lengths was significantly better. Notice that the antenna is not as short or as heavily loaded by the traps as some trap dipoles. 6 Hustler 6BTV Trap Vertical ~$300 6. I'm measuring the SWR with the meter. DX-EE - "No-Trap" 40-20-15-10 meter dipole or inverted V. Its overall length is 1/2l or about 10 m for the very popular 20 m band. So if you had a 80-10 meter trap dipole with traps for 40,20,15 and 10 the loss on 80 would be virtually nil. You'll probably hear me with the amp on, spending time on 20 meter SSB until we get some 12 meter propagation. These antennas are broadband for ALE and do not require a tuner. Dipoles antennas are easy to build and can be very effective when placed half a wavelenth or more above ground. Total trap loss = 0. Most of the mechanical construction is now ready. Michael Zapf. On the tower is also a 5 element 6 Meter yagi antenna. You have half of one antenna in the center of another antenna. Zapf, DPM, MPH, FACFAS, FACFAOM. In Figure 3, the outer section of wire on each 2-band antenna is very short, though. I tried 160 meters, but that was pushing it a bit too. W3DZZ Multi-band Antenna 80-40-20-15-10m Trap Freq MHz Turns uH Capacitor pF dipole. 70 meters and yes, too short. 80/40 Meter Attic Antena I live in a tightly packed urban neighborhood without much room for antennas. On HF, one of the factors that determine how far your signal goes is the takeoff angle. Ham Radio Dipole Transmission Line. 4 m) at the ends. 160/80/40 Meter Trap Dipole - 190 ft long. The 40 meter traps and the rest of the antenna do not exist to 20 meter RF. trap design used in two 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. Members built their own baluns (a simple 1:1 voltage balun) and a pair of 20 meter coax traps. Power rating: 160 and 80 meters: 600 watts CW/PEP. ALPHA DELTA DX-DD "No Trap" 80 and 40 Meter Dipole or Inverted V Antenna 80/40/20 METER FAN. 7 As can be seen above, The ZS6BKW performs quite well on all three bands. It's a rugged homebrew multi-band trap vertical antenna that works the and 20 meter amateur radio bands" Dipole and Inverted V Antenna Basics "This antenna project came out very nice. No-Trap 80-40-20-15-10 meter dipole or inverted-V End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. I'm close to having my 80/40/15 meter CW transmitter (apprtox. Length is 100 feet. It feels weird to have an antenna for that band and not for 20 o 40 or 80. W2VS traps are available for 80 meters and up in two versions. Last weekend I contacted France on 20 meter SSB with 5/9 signal reports. 160 Meter Dipole Antenna at W5JGV house closest to the "hamshack" out to a handy tree about 20 meters or so away from the house. Cushcraft A3 Tri-band Beam with 40 Meter Add-on Dipole, 30/17/12 Meter Rotatable Dipole, and Diamond X-50 VHF/UHF Vertical. A full size #14 copper wire resonant dipole will have a gain of about 2. 80 40 meter dipole. This antenna is very stiff and not quickly or easily deployed. With a Q of 200, the traps equalize performance on the two bands at just above 1. It would not have the gain of the doublet, but simpler to erect in field. 15 20 40 80 Meter Ham Radio. " Although more expensive than Unadilla traps ($76/pair versus $52/pair), the mechanical design seemed more robust so a pair was ordered. (17 x 2 = 34) If possible, erect the dipole into the desired position to make SWR measurements. Figure 10 (red=80-40m Dipole, blue=80m Dipole) Figure 10 show us that we should expect at least a 2. 80 40m trap dipole. Most texts quote dbi information for a full sized dipole 100 feet high. The loss on 40 would essentially only be with the 40 traps, and even very poor traps would have less than 1 dB loss. Apparently, 40 meters was the place to be for this sprint. Really deep QSB on 40-meters and 20-meters seemed to die a bit early. 5 m between 20 m trap and 40 m trap and 11 m between the 40 m trap and the end of the antenna. Homebrew 40 & 80 meter dipole. Michael Zapf. About Trap Dipole for 80 40 20 mt The resource is currently listed in dxzone. 38' ½ lambda 0. 4 m) at the ends. Jerrie has his antenna mounted as an inverted V with the center at about 38 feet and the ends drooping down to around 20 feet off the ground. Weighs less than two pounds and pulls high in the air with lightweight cord. So far received 3 votes for a total score of 9. 21 - G5RV Antenna. Michael Zapf. MULTIBAND TRAP DIPOLE ANTENNA - (40,20,15,10M BANDS) * Simple and Low Cost* Resonant Antenna, no tuning required while changing bands* Short in length as compared to half-wave DipoleRequires careful fabrication & tuning of TRAPS( Only a few inches of RG58. Items in search results. 5 on 80, most of 75, 40, 20, 17, 10 and 6. 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. Cushcraft A3 Tri-band Beam with 40 Meter Add-on Dipole, 30/17/12 Meter Rotatable Dipole, and Diamond X-50 VHF/UHF Vertical. In the drawing above, it is shown for just four bands, 80 thru 10. A coaxial-cable trap dipole antenna installed in the attic provides a surprisingly effective solution to HF operation on the 10, 15, 20, 30, 40, and 80 meter amateur bands at a QTH with restrictive covenants that prohibit outside antennas. magnetic dipole antenna. This is particularly important on the lower frequency bands including the 20 and 30mtr bands for significant moves and for even minor frequency moves on the 80 and 160mtr bands. This includes 12M, 17M, and 30M. DX-EE - "No-Trap" 40-20-15-10 meter dipole or inverted V. Any ideas on why 40 won't tune? thanks. ANTENNA BASICS FOR BEGINNERS VERTICALS on 20 and 40 meters Electrical Equivalent ½-Wavelength Dipole Vs Inv-Vee 80 m Dipole BW 3. You may also like. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. 5 80/40 Dipole W5DXP (148 ft) 11 8. Most signals are about 2 to 3 S units above my W9INN 20-40-80 meter dipole and the clarity is very close to the same, this antenna replaced a very good G5RV 10/80 meter dipole, that worked good on 75 meters but was down about about 3 S units from my W9INN dipole" —KB6HRT. You can feed your dipole with coax, as already mentioned above. An Attic Coaxial Cable Trap Dipole for 10,15,20,30,40 and 80 Meters; Antenna Lessons from Old Timers (EHam article). Doublet aerials for HF amateur ham radio and broadcast bands. Overall length is 82 ft. “Bguys I put this up but had site problems to install the 40 m section So I just put a 40 m trap 33 ft from the feed point and thereby incorporated the 40 meter section into the 80 meter length. My friend Jerrie - KD5KD has been using an antenna like this with great success on his Navy MARS net which is near the 80 meter band. A two meter long 80 meter dipole will be about 10% as efficient as one 40 meters long at the same height. Build a Space-Efficient dipole Antenna for 40, 80, and 160 Meters (570,975 bytes, PDF file) QST July 1992, pp. Going down the table to the 3 band section, we find wire lengths of 8'2" 22 '1 1 ", 24 '3 " under the 10, 40, and 80 meter headings, respective- From the dipole center to the I O meter trap (KW-10) is 8 2 From the 10 meter-trap to the 40 meter trap (KW-40) is 22 '1 1 ". a quarter wave antenna dipole for 20 metro. We designed and built this antenna to mount just below our tri-bander at about 70' on a crank-up tower. The 40 meter antenna can be used for 15 meters. Power rating: 160 and 80 meters: 600 watts CW/PEP. Contact one of your local Diamond ® Dealers for current price & availability. 15 MHz traps 0. Distance from center of antenna to the center of the coil in feet (Must be less than half the total antenna length given above). He is a member of the Agoura-Los Robles Podiatry Centers. 9m (9' 6") outers from trap to end of aerial at the insulator. After trimming, the 80 meter elements were about 4 feet long for a total antenna span of about 76. I had a tack-tenna, meh. The SWR is less than 1. For simplicity of operation, I want to avoid an outboard tuner. Two New Multiband Trap Dipoles QST August 1994, pp. , Fully Assembled These are great for High Performance and Limited Space Antennas and unlike the usual trap antenna, there are no capacitors to break down under high RF voltages. Flags and Pennants-- Receive antennas for limited space with good noise rejection. This is a simple dipole built for two-band operation that I made for portable use with my 20 and 40 meter QRP rigs. On HF, one of the factors that determine how far your signal goes is the takeoff angle. Delivers up to 6-dBi gain on 40 Meters, 9-dBi on 20 Meters, and a whopping 11. It has worked well for me - still does. 04; ALPHA DELTA DX-DD "No Trap" 80 and 40. Also covers 30-17 & 12 meters with an antenna tuner. Although it may not seem logical, shortening a multi-band dipole intended for 160 through 10 meter operation to less than 220 Ft. Add Review ×. If it is a straight dipole, fed with coaxial line, what frequency is it cut for? Or, is it a fan dipole? There is no such thing as a dipole for 40 - 10. Dipole antenna with traps for 20 and 40 meters Original article posted on: http://sv1cdy. Going down the table to the 3 band section, we find wire lengths of 8'2" 22 '1 1 ", 24 '3 " under the 10, 40, and 80 meter headings, respective- From the dipole center to the I O meter trap (KW-10) is 8 2 From the 10 meter-trap to the 40 meter trap (KW-40) is 22 '1 1 ". One segment is directed to the ground, the other one to your transceiver. Handles power up to 100W of RF. I am now preparing a new home. The antenna is close enough. So far received 3 votes for a total score of 9. Since it is omni-directional, dipole orientation is not important. Of course if 40 is included you will get 15 meters as well. 21 - G5RV Antenna. 26-29 W8NX details a new coax trap design used in two multiband antennas; one covering 80, 40, 20, 15, and 10 meters, and the other covering 80, 40, 17, and 12 meters. 160, 80, and 40: Hy Gain Hy Tower with homebrew inverted L attachment for 160 (10 foot mast off main tower section fed through 40 meter trap with horizontal part of L running to other antenna tower, cut slightly long so inductive reactance is canceled by switch selected capacitors made of RG-11 to cover entire band). Homebrew 40/80 Trap Dipole Design This Antenna design was one that I used about 4 years ago, it worked exceptionally well on 80m and 40m. A wire dipole works so much better, and my Buddistick vert is amazing on 40 meters. The overall length of the dipole will be 16m (52ft 7"), but will need support guys of at least 18" at each end. This includes 12M, 17M, and 30M. 5 to 6 dB improvement as measured on 40m by Rudy Severns N6LF. He is a member of the Agoura-Los Robles Podiatry Centers. hamstick dipole kit. 40-10 Meter Portable Dipole Phil Salas - AD5X ([email protected] W3DZZ Antenna for the 160, 80, 40 and 10 meter Band. An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters. Vice versa with the longer traps as used for the 40 meter band (length 45 cm)I have observed which the tube aren't round but are oval. That's interesting since I have been using my dipoles -- at 14 to 20 feet -- for both 40 and 20 meters as an NVIS antenna. trap design used in two 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. Cushcraft A3 Tri-band Beam with 40 Meter Add-on Dipole, 30/17/12 Meter Rotatable Dipole, and Diamond X-50 VHF/UHF Vertical. The build quality of the current antenna is up to the same standard, and has proven rugged in the field. 8 ZS6BKW Dipole (94 ft) ~$70 10 9. As the fishing poles I had lying around were 8. 5 across the entire band. I read a nice article by A. And that's all there is to it! This is a great first antenna! Your next step, after getting some air time, will be to insert some traps in that dipole so you can use it on 20-meters. Dipole antenna with traps for 20 and 40 meters Original article posted on: http://sv1cdy. Antenna is full-size on 40 Meters and has ultra-efficient end-loading on 80 Meters. A good trap antenna will provide multiband coverage and usually don't require a transmatch. Due to the focusing,. Describe your experience with the MFJ-17758 80/40 Meter Dipole Antenna and tell us why you give it the rating you did (required). this pdf file desscribes how to homemade a multi band end fed trapped wire antenna resonating on the low bands of 160 80 and 40 meters contains trap design instructions and some construction tips. dipole, depending on how much extra length (with the 80m traps) I need to add to get it to resonate on 160m. One of the 20 mtr antennas that I built is a half-size 2-element "yagi" beam antenna, based on a design by Gary Hanson (KJ5VW), ref. 43-foot vertical for 160-20 meters, and a Hy-Gain TH-1 rotatable dipole for 20/15/10/6 meters, as this dipole normally outperforms my vertical on the higher bands. Two New Multiband Trap Dipoles QST August 1994, pp. 16’ ¼ lambda 60 METERS = 62. You can mount them high and away from the trees for better performance than a wire dipole. Often the items needed can be salvaged from previous antennas, or bought for relatively small cost. A linearly-loaded, trap dipole for 80, 40, and 30m Since I have had my hex beam up, I have not been operating much below 20 meters. the center of the dipole and. 5m lenght, 2kW. However, the trap should always be placed across a porcelain insulator. I have since fine tune the 20 / 40 meter trap dipole and this is a really nice antenna for limited space. This is a pair of 40 meter traps to use to make a 40 and 80/75 meter trap dipole. The 40 metre trap in clearer detail. 25 lambda 0. Construct a compact, 20 meter rotatable dipole antenna of durable weather worthy components supported at a single point obviating the need for multiple supports and multiple support ropes crossing the yard. Based on the formula near the top of this page, I would need only 35 turns. The antenna is resonate on both bands and does not require an antenna tuner. I started to make the TRAP's: I use 50 m. Rated for 2KW PEP. -A Hustler 6BTV 80/40/30/20/15/10 meter vertical is 24 feet tall -On 80 meters, it is only 0. Power rating: 160 and 80 meters: 600 watts CW/PEP. The antenna works on the bands as advertised with low SWR. Main HF Antenna Mosley Pro-67 Yagi 6-40m Antenna Switch Beam's 20 meter band SWR 40/80 trap Dipole 80 meter SWR Antenna Switch. It can be designed for use from 160 thru 10 meters very easily using the standard 1/2 wave dipole formula: 468/freqmhz = total length (ft) end to end The exact length is not critical! If you don't have room for the 160 or 80 meter versionthen design it for 40 meters and up!. MULTIBAND TRAP DIPOLE ANTENNA - (40,20,15,10M BANDS) * Simple and Low Cost* Resonant Antenna, no tuning required while changing bands* Short in length as compared to half-wave DipoleRequires careful fabrication & tuning of TRAPS( Only a few inches of RG58. Most signals are about 2 to 3 S units above my W9INN 20-40-80 meter dipole and the clarity is very close to the same, this antenna replaced a very good G5RV 10/80 meter dipole, that worked good on 75 meters but was down about about 3 S units from my W9INN dipole" —KB6HRT. All readings were taken with a Array Solutions AIM-1470b Antenna Analyzer. This package will give you the same band coverage as a full-size 40-meter dipole, a full-size 80-meter dipole, and a shortened 160-meter dipole. The antenna is now just ½ wave above the ground ,and the effects of. Use as a dipole, inverted V or upright V antenna configuration. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. Barker & Williamson - manufacturing HF antennas and masts for military, government, EOC, and commercial use. From Long wire to Yagi. The center of the antenna was lagging a bit because I did not tighten the ropes too much in order to make sure that the antenna would not come down during the first wind. How to tune the 40/80 meter coil loaded inverted V dipole antenna. 51MHz trap in 80/40 dipole. HUSTLER RM-20 Standard Resonator, 20 METER 400 WATT FREE SHIP! AUTHORIZED DLR. A Broadband 80/160 Meter Dipole An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band. It may prove to be a bit short on 75 meters since the antenna with which the measurements were made was only about 20 ft (6 m) high at the center and drooped to about 8 ft (2. The half-wave dipole is very simple to construct. During the PACC 2013 I used this antenna for 160 meters. homemade folded dipole. Traps allow operating one dipole on more than one frequency. I do wonder though why the 20 meter dipole isn't being affected but the 40 meter ones are. Overall length is 40 ft. Diamond ® Antennas are sold through authorized dealers. Discover Lot Stainless 6 Stainless in stock online. Other dimensions can be devised for bands other than 10, 15 and 17 meters. Our baluns have a bolted, clear polycarbonate case and are not filled with insulating plastic like other baluns. FS: Hygain Model. BY KD8OUT, Mike Kieffer. Add Review ×. After testing over ten different antenna configurations we decided on a couple that worked well for our needs. We designed and built this antenna to mount just below our tri-bander at about 70' on a crank-up tower. 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. How to tune the 40/80 meter coil loaded inverted V dipole antenna. The antenna is resonate on both bands and does not require an antenna tuner. This antenna covers 65 kHz of 160 meters, 75 kHz of 80 meters and the entire 40-meter band with SWRs under 2:1. Like all inverted vees, it requires a single center support, which is often times a tower which is topped with a Yagi or quad for the upper bands. Cushcraft A3 Tri-band Beam with 40 Meter Add-on Dipole, 30/17/12 Meter Rotatable Dipole, and Diamond X-50 VHF/UHF Vertical. 8:1, followed by the 40 m wires then the 80 m wires. 80 40 meter dipole. So the antenna in Figure 3 can be broken down into 10-stub-20, 20-stub-40 and 40-stub-80. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun.