20 Meter Vertical Antenna Homebrew
Since the bandwidth of the antenna is wide the adjustment parameters are relatively broad and fine adjustment is not usually necessary. The version shown here incorporates changes suggested by Steve Hartley and others. The 20 meter vertical with an elevated, tuned counterpoise works very well. 7, depending on what portion of 20 meters is being used. The last series of compact 160 meter antennas were not that satisfactory. 4m with 8 radials. 5dBi gain over a 1/2 wave length antenna (mounted same height) by shaping some energy from vertical direction to the side. However, almost any combination of ham sticks can be used. The 40 Meter Isotron Antenna. For a while I used antennas for other bands with a tuner to get on 30. My base antenna Vertical Hustler 4BTV, Homebrew Rotary Dipole and MFJ-1775 Mini Rotatable Dipole. 4 520 foot beverages. This is a very simple antenna to build. All Bands Vertical Antenna. 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. The correct lengths for the various models will be displayed in the chart. I mentioned simple and small antennas. LIVE IN A CC&R RESTRICTED AREA The Zerofive multiband Flagpole vertical is what you need. Dipole Antenna Length Calculator. Requires ¼ wave radials for each band or many (60+) short radials. I finally got the PVC cover on the 40 meter helically-wound antenna I started back in April. Since the picture was taken, I've added a coax balun at the feed point similar to that shown in the ten meters antenna pictures. Meanwhile I make do with a neat little 2 element triband Yagi built by my pal Lee ZL2AL (SK). ) or Hustler 6, or if you have plenty of dosh, then a Butternut HF9V 9 band vertical. As typically installed, it is a compromise antenna but great for portable use because it is easy to pack and easy to install. Propagation-wise it more closely resembles the 40 meter band. 1 MHz to 10. Enter the desired operating frequency in megahertz to get a good starting length for a dipole in both feet and meters. This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. He could also construct a half wave dipole fairly easily and it would work about as well as the quarter wave vertical if mounted in vertical orientation. Mounted on the ground the antenna has a low take off angle for working DX. Radial systems can be very large especially for the lower ham bands. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. half-wave vertical. - Portable Vertical Antenna for 75m and 40m makes up a compact 28 feet high antenna. I give a thumbs up to this antenna; I believe I am getting a lower angle of radiation. K7NJ Utah Antennas on 42 acres: 54 ft vertical with antenna tuner at the base SteppIR 4 element yagi antenna 8 element circle array on 40 meters Beverage antennas in 6 directions Na’aleh, Israel Station: Yaesu FT1000D Transceiver Homebrew Power Amp 4PR1000A 160 - 20 Heathkit SB 200 Amplifier Popular Electronics Magazine Mt. Skip to main content. So I wanted a self-supporting rotatable dipole for best performance on 12/17 meter as well. MultiBand Vee Beam-- Six Band One Element Beam 20 meters thru 6 From LA0HV Mystery Antenna 80M thru 6M - John P Basilotto, W5GI. Works great and gives several extra bands besides the 80/40/20/10 meters using Kenwood with. Home Brew 30/40 Meter Vertical Antenna by N2RIT. I am trying to figure out how to get another one and get it “portable” for field day (I need to figure out the financial […]. Since I've been pretty satisfied with the performance of my 40M tree-mounted wire vertical, I wondered if there was some way to get another vertical mounted nearby and use the two as a phased array. •Need lots of room, keep them away from metal objects like heaters and ducts •Wire antennas can be run near the peak of the roof inside the attic, bent in odd shapes to match the space available. Since this antenna has no exposed metal wire static charges cannot build up thus reducing noise by 6 dB over antennas constructed of exposed bare wires. Feb 12, 2018- Low-cost home brew antennas for amateur radio. Because my antenna is closer to 1/8 wavelength rather than 1/4 wave typically used for vertical radiators I have already compromised some efficiency so I feel a good radial system is essential. 1, 14 & 21 Mhz bands Roofspace Antennas — how to build them and get them to work Rotary Dipole — for 17 and 20. Gilberto, PY3FBI, sent this photo of a two-element 20, 15 & 10 meter cubical quad beam antenna he constructed and installed at a camp located in the city of Santana da Boa Vista, 127 miles (240 km) direct, 199 miles (320 km) by road, southwest of Porto Alegre, the capital of Rio Grande do Sul and largest city in southern Brazil. 20 Meter Vertical Moxon. Each band driven element is cut to formula for a dipole and has four radials are also cut to frequency. (The 75 or 80 meter amateur band in the USA extends from 3. Either will perform well, even a modest heights, like 20 or 30 feet. Get it as soon as Fri, Sep 27. quarter vs. His antenna position is very poor: he lives in the bottom flat of a 5-floor building. 67 shipping VERTICAL GROUND PLANE ANTENNA FOR THE 2 METER BAND. The single-element loop antenna is almost exclusively used on the low bands, where it can produce low-angle radiation, requiring only a single quarter-wave high support. 48 118 + j316 12 meter 10. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. My goal was to be able to work from a small mountain near my home, and do so at QRO power levels, with a beam antenna. Since the bandwidth of the antenna is wide the adjustment parameters are relatively broad and fine adjustment is not usually necessary. Even though these antennas are a fraction of the size of a full size resonant antenna, size of the lower frequency loop can still be quite large for a limited sized property. 80-meter dipole and I really enjoy CW on that band. Using the EFHW for 20m at GB0CMS 3. The Isotron Antenna. Antenna performance and 2:1 VSWR bandwidth is site dependent and varies with height above ground and surrounding objects. Dick described a 6M Halo antenna that was built from the aluminum frame of a 'generic' lawn chair. I've heard Tim (HLR) and others talking about it, so this morning just before work I fired up the Flex 1500 (5 watts outpoot) and using a 220 Ft long flat top at 90 Ft, I was able to work 2 Italian stations, the Ukraine, and Germany through modest pileups. For a while I used antennas for other bands with a tuner to get on 30. An effective antenna is usually at least ¼ wavelength in some dimension. an antenna tuner at the base of each vertical to adjust the antenna to a center frequency of 3650 kHz; we needed a tuner in the shack to adjust for the CW or SSB band segments. however this is a bit like saying that a vertical antenna with a single raised radial does not need a solid ground system. The Pacific Antenna Dual Band Trap Dipole kit provides a lightweight, portable trap dipole. It had a 28’ radiator, one 16’ ground radial, one 31’ ground radial, and a 4:1 Balun, all designed by Martin-VA3SIE. HOME BREW 11 METER LOOP ANTENNA. However, I put the article and the idea aside, because I had no interest in a 6M vertical antenna for this QTH (nor, for mobile operation, either. Thanks for the report Brent. We will see that a vertically. The Half Square antenna is a wire antenna with two vertical radiators fed in phase. H5ANX Mk4 Delta Loop Design By Sajid Rahim – E-Mail H5ANX (Bophuthatswana), ZS6EW and A22EW Antenna Background This antenna design was brought about by a need to have a simple effective and efficient antenna using simple materials. JK Antennas can meet your needs with a wide range of Ham Radio, Amateur Radio HF Antennas, including Monoband, Dualband, Tribander, Multiband, operating on frequencies from 6M to 80M. Ended getting a couple of QSO's on 17 Meters with 5 watts. It is an excellent all-around 40 meter antenna for those who don’t have room for (or can’t afford) a yagi, but want more than an inverted V. For Indoor or Outside field use. As typically installed, it is a compromise antenna but great for portable use because it is easy to pack and easy to install. The 20 meter extended double zepp was an enjoyable project that gave my qrp signal a needed boost. •Need lots of room, keep them away from metal objects like heaters and ducts •Wire antennas can be run near the peak of the roof inside the attic, bent in odd shapes to match the space available. The Isotron Antenna. The antenna easily loaded 10-20 meters in the vertical configuration but it didnt do well for me on 10 and 17 meters as a horizontal dipole. 25 wavelength vertical, depending on soil characteristics. By clicking on the label "40 Meter Vertical" located at the end of the post blogger will display only my posts sharing the same label. The original antenna was designed as a moderately short antenna for the 10 meter band. Using the EFHW for 20m at GB0CMS 3. I built the stand from old redwood that I got from taking apart an old deck I built many years ago. Multiband Fixed Height Vertical using an antenna matcher at the antenna base – 43 foot concept again; Forget the vertical and get a dipole; Because I am getting good results on 20 meters with my 16. His antenna position is very poor: he lives in the bottom flat of a 5-floor building. On 40 meters, for example, a¼-wavelength vertical antenna is a metal tube or wire 33 feet high. I was wondering if instead of having a ground-plane if i could just drive a few wires into the ground connected to the ground of the so-239 connector. Example antenna for 20-17-15-12-10 meter (High HF + WARC). I wrapped the antenna wire to the gardening wire. DX-LB Low Band Dipole Covers 160-80-40 meters with an overall length of only 100 ft. With a height of 43+ feet & a gain of 3 dB (in theory) it should really kick some DX butt!!!. It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands" See All Details : The 10/15/20 Meter Trap Vertical Antenna This antenna project came out very nice. A few days ago, SWLing Post contributor, Robert Gulley (AK3Q), pointed me to an excellent website by Harry Lythall (SM0VPO) which is chock-full of various homebrew radio projects. Contact one of your local Diamond ® Dealers for current price & availability. Something better than half-wave vertical? 9. 40 twinlead Quarter wave Vertical is: 16. This antenna is similar in construction to the 2-meter OFC sleeve dipole I built over 8 years ago, but it is a simple center-fed dipole. Hi all, I braved the cold and put up a vertical HF antenna last week, about 5 metres tall. I built the stand from old redwood that I got from taking apart an old deck I built many years ago. A homebrew Hexbeam antenna built in 3 hours. It's the best 40 meter vertical I've made yet but remember - these only work from about 1,000 miles upwards. First, I must say that setting up a base radio (11 meter) and accompanying antenna is a new hobby for me. 7:1 at 146 MHz, indicating that the antenna is a bit long. KH6JRM's Amateur Radio Antenna Topics: A 20 meter vertical antenna with tuned counterpoise. 66 in total. Two 1/4 wave ham sticks in a dipole configuration produce a 1/2 wave dipole antenna. Thanks for the report Brent. You can find information here from vertical antennas to loops and from Moxons/Yagis to Quads. 133 - Collinear Zepp Antenna. 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. Make antenna telescoping dipole. I am trying to figure out how to get another one and get it “portable” for field day (I need to figure out the financial […]. The 34-foot, 22-ga. But it doesn't, really. Here is a view of the antenna: Here is the SWR plot: Will run 1W WSPR for 24 hours and compare data with the 1/4 Wave vertical. It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands" See All Details : The 10/15/20 Meter Trap Vertical Antenna This antenna project came out very nice. The four bands planned are 80 meters, 40 meters, 20 meters, and 10 meters. I've four wires coming out from the base as a ground plane. 40 meters should be direct feed. As you all probably know,I use this comercial antenna with a lot of good rapports with my Bitx projects. Of course, with a fairly good tuner, an 80 meter vertical can be made to 'work' almost anywhere. The 6 meter Moxon is built from 5/ 8 inch OD and 1/ 2 inch OD aluminum tubing with 3/ 8 inch OD solid aluminum for the corners. All you need to do is enter the desired resonant (center) frequency in the form below, then click "Calculate". Not having a lot of room for 40 meter beams, I decided to use the space I do have, which is a long wooded fence in the backyard. The antenna is probably too long. In both instances, I was very pleased with the results. This antenna performs well in restricted space areas. This thing works great! UPDATE: The mount has been changed to a 1" pvc tube u-bolted to the stand. I would like to suggest another purpose for the cattle feedlot panel. I will homebrew a matching L network for use on 160 thru 60 meters. 131 - Coax-Cable Collinear Antennas. I used some #22 gauge wire for this part of the antenna. It is always a pleasure to peer into the working mind of another homebrewer and scrounger. 23 28 –j421 30 meter 7. G7FEK Limited Space Antenna G7FEK Multi-band “Nested Marconi” Antenna - 2008 Version (rev 5) This antenna was first conceived as a simple dual band antenna in 1988, in an attempt to achieve sensible dual band operation in a small garden of 14m (46 ft) length. 2% for the longest side after determining the half wave length at the lowest operating frequency…. An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters John DeGood, NU3E [email protected]
150 MHz, is quite narrow and is restricted to cw and data transmissions. front-to-rear, F/R), gain (in the forward direction), feedpoint impedance (hence, SWR bandwidth), and side-lobes These characteristics depend in a complex manner on design parameters such as spacing between the elements and. This antenna is an excellent performer, and ruggedly built. 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. This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. The Half Square antenna is a wire antenna with two vertical radiators fed in phase. Theory said this should work 10-20 meters. Rr decreases approximately as 1/length2. For example, on 10 Meters, you will use a total length of 8 feet. True, the q section only works on one band, in this case, 160 meters. NVIS – Near Vertical Incident Skywave Antenna: The Emergency Communications Antenna By Stephen C. Antenna was originally a 66 foot (22+44 feet) horizontal with 25 feet of 450 ohm LL vertical. In free space the center-fed half-wave antenna has an input impedance that is a close match to 50 ohm coax and to most radios that have a 50 ohm output impedance. We are also currently working on designs for Vertical Antennas, so check back with us for updates. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. Removed the coil at the bottom, added 4 radials of a 1/4 wave at 20m and there it was. I will homebrew a matching L network for use on 160 thru 60 meters. 20 meter vertical antenna projects is a curation of 11 resources about , 20m T-Monopole, Vertical moxon for 14 Mhz, 20 Meter Jpole Vertical, The ground image vertical antenna, Dual Band vertical antenna for 20/40. It is constructed of 5 lengths of aluminum pipe/tubing supported by a painted 2X2. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. For Indoor or Outside field use. All Bands Vertical Antenna-HF (homebrew) A few months ago my friend 9W2 AYR(Anuar) and I visited my new friend 9M2LR (Mr. The VERTICAL BAZOOKA antenna will handle full legal limit power with no effect to performance. 092 wavelength long. Remember you have to do the same amount to both sides ! Once the SWR is good for the 40 meter band, you can test 20, 15, 10 and 6 Meters. 134 - Taylor Vee Antenna for 20m. antenna! - Proximity to earth changes the impedance - High dipoles are closer to 75 ohms - Low dipoles are closer to 50 ohms • Feedline SWR (and loss) depends on the match between feedline and antenna - Use feedline that matches the antenna • XMTR will reduce power if mismatched - Use an antenna tuner to make the rig happy. My base antenna Vertical Hustler 4BTV, Homebrew Rotary Dipole and MFJ-1775 Mini Rotatable Dipole. There are numerous reasons why people shy away from trying to put up a good antenna for this band:. I got my general license in October 2009 along with my kenwood ts-50 and a mfj 929 intellituner. Wire Antenna Calculator. 5/8 antenna could have about 3. Its overall length Two are the key points making this antenna robust enough: a) Find great deals on eBay for 20 Meter Antenna in Plotter Ham and Home Brew 20 Meter Rotatable Vintage Large Ham Antenna Tuner , matcher 10 15 20 m ,meters 20m Projects - Antennas. With that said, go look up the cost of one that is being sold in the magazines and on the web. There are no holes to dig and no concrete to buy and pour. Use a screwdriver and pliers to re-lease one wire from beneath one of the rivets on the 58-inch element. An effective antenna is usually at least ¼ wavelength in some dimension. “Very good antenna for my small garden : entirely functionnal in 80meters and 40meters , I an adding a small coil 4 turns diam 80mm at the base to compensate the small desaccord 300khz up for resonate to 7. The correct lengths for the various models will be displayed in the chart. Of course, with a fairly good tuner, an 80 meter vertical can be made to 'work' almost anywhere. Adjust length as necessary. entenna by DK7ZB With two reflector elements the Hentenna can be changed from a bidirectional antenna to an interesting directional antenna. Using the EFHW for 20m at GB0CMS 3. 131 - Coax-Cable Collinear Antennas. Antenna Parts Balun Designs - Baluns Bozak. 20 Meter Vertical Homebrew (1/2) > >> Bob Sherman: Can anyone suggest a website featuring effective 20 meter vertical homebrew antennas? tried to Google and didn't find much. Home Brew 30/40 Meter Vertical Antenna by N2RIT. impedance of 50 ohms with a half wave length antenna, and the capacitor should have the ability to handle the R. ó , kdyh kdg \rxu pxowledqg hqg ihg dqwhqqd lqvwdoohg khuh lq 6lqjdsruh iru d ihz zhhnv qrz dqg dp yhu\ sohdvhg , xvhg wkh zluh iurp p\ suhylrxv dqwhqqd zklfk lv ihhw orqj ,w zrunv ehdxwlixoo\ , kdyh lw. The 2 el Optibeam antenna for 40/30 Meters is installed on this tower. The 40 Meter Isotron Antenna. And pulled the gardening wire back through the hole in the fibreglass pole with the antenna wire. There is even a 17 meter DX version available from some suppliers and homebrew designs are online. MAKE ALL LENGTH ADJUSTMENTS IN THE HORIZONTAL LEG OF THE ANTENNA. This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. Requires ¼ wave radials for each band or many (60+) short radials. 19 (42 used & new offers). This antenna is perfect for HAMS that need a quick reliable solution for local 2 meter communication. 5 to 6 dB improvement as measured on 40m by Rudy Severns N6LF. Being a half-. For the PACC contest I need (several) antennas for every band. You may see a picture of this antenna on my QRZ listing. If you put the feed point on a corner (of a square shape) it will be half vertical and half horizontal. The dipole consists of #18 stranded insulated wire. Steve, Just to let you know HOW good 10 meters is. Here is how I managed to get pretty decent results with a homemade antenna. W4ZCB is situated on a small mountain in North Carolina. Then I have about 15' of coax that screws to the match box and I run it into my car window to my operating position in the drivers seat. I will also try a 20 meter tuning stubb. The antenna offers. I want to make a 10 meter half wave vertical out of wire. 10/15/20/40 Meter Vertical Antenna for Restricted Areas Operate 12, 17, 30, and 60 Meters with these MFJ Stealth WARC Band Vertical Antennas. Figure 1 — A comparison of the lower radia-tion angle and greater gain of the Moxon (red) compared to the dipole (blue). They're ground. He has a balcony on the rear (south) side, but high buildings are very close, he has no direct sight in any direction. This page is a collection of short vertical antennas that I built over the years, for the 80 mtr band. from many different materials, such as aluminum tubing, military-surplus cast-aluminum mast sections, tower sections or a wire hung from a conveniently placed tree. (The 75 or 80 meter amateur band in the USA extends from 3. The G0KYA EFHW – an end-fed half wave monoband HF antenna, plus two multiband versions (New!) A practical, cheap monoband or multiband (new!) vertical antenna that is great for DX and very cheap to build. It is often the first antenna they buy or build for use on 2 meters after receiving their technician license. Power and Antenna Gain on 60 Meters Our new 60 meter allocation restricts you to 50 W PEP into a dipole, but what if you're not using a dipole? How much power can you use? tiles for the new 60 meter band re- quire that the operator use no more than 50 W PEP into a half-wave dipole, or an equivalent ERP (effective. 80-meter dipole and I really enjoy CW on that band. One separate dipole for each band. MP1B forms the basic core antenna of the various MP1x series Super Antennas. Figure 2 — This shows the superior front-. After installing the antenna, measure the SWR to find the resonance of the antenna and note it. An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters John DeGood, NU3E [email protected]
DX Engineering 40 Meter Fast Taper High Performance Vertical Antennas are self-supporting vertical antenna radiators that operate over the entire 40 meter band with an SWR of less than 1. mast which holds three other antennas, viz. ith its size, ease of installa-tion, and reliable perfor-mance, the 40 meter quarter wavelength vertical antenna is a very popular HF antenna. Homebrew 20 Meter Dipole Antenna -- Home Depot / Lowes Part 1 - AF5DN - Duration: Ham radio 40 meter homebrew ground mount vertical - Duration: 4:24. As typically installed, it is a compromise antenna but great for portable use because it is easy to pack and easy to install. Its gusting 20mph. 4 Stealth antennas for the loft 37 5 External antennas 75 6 Over-the-roof stealth antennas 81 7 Examples of external stealth antennas 99 8 Let’s get really stealthy 123 9 Commercial stealth antennas 139 10 Avoiding interference and EMC issues 161 11 Maximising efficiency 177 Appendix 1 Glossary and abbreviations 184. And pulled the gardening wire back through the hole in the fibreglass pole with the antenna wire. A dipole design for the 20-meter band is an efficient and inexpensive antenna for the novice and veteran ham enthusiast alike. My 40 meter vertical cost me $13. This is a top-loaded 80/40 meter vertical which replaced my Butternut once I installed a tower with a beam, and no longer needed a vertical to operate above 40 meters. 150 MHz, is quite narrow and is restricted to cw and data transmissions. It will require a base matching network for each band since it is not resonant on any of them. This was created as a fun project to demonstrate how to enjoy operating HF in the field with a home-made portable antenna without spending a ton of money. The antenna is constructed using a 4-way electrical conduit junction box and 3/4″ PVC electrical conduit as shown above. 2% for the longest side after determining the half wave length at the lowest operating frequency…. An optimized shape real Bi-Square antenna has 2 dBd gain. Aug 7, 2019- Explore centerfirenotw's board "homebrew antennas" on Pinterest. Mounting the 20 metre delta loop The balun is attached to the top of the house using Para-cord and a pulley, the cord is tied off on a cleat. This gives the loop a tuning range from 15 through 10 meters. It should be resonant on the desired operating frequency, have a balun at its feed point, and be fed with RG-213 coax. This seemed a good one to try, so I took a yellow toroid I'd saved when scrapping a PC. So I wanted a self-supporting rotatable dipole for best performance on 12/17 meter as well. However, they did not prohibit a flagpole to show off the colors. Tuning the COM-20VA 20 Meter Vertical Antenna is straightforward and intuitive. 6m Antennas 4m 6m Dual Band Antennas 4m Antennas 2m Antennas Dual Band Antennas 2m 70cm 70cm Antennas 23cm Antennas 13cm Antennas Commercial Antennas Band Pass Filters EME2 - EME3 BPF LNA T/R Relay Low Noise Amplifiers Power Splitter Divider Combiner HF Antennas 2. Now I can work on the 10,15,20,40 and even on the 80 meters band without the use of a tuner. stacked folded dipole, homebrew dipole wifi antenna grid, half wave fm dipole, multiband loaded dipole calculator, vertical dipole 160m, home made 800 mhz dipole antenna, quarter wave dipole twenty meter antenna. I have documented a short antenna for the HF bands, but here is a simple method of mounting it, and a method of further reducing the physical length. I got my general license in October 2009 along with my kenwood ts-50 and a mfj 929 intellituner. Finch, AIØW Introduction The antenna axiom, “the higher, the better,” is true for working distant stations. This base loaded antenna costs about $129 USD and is usable on 80 to 10 meters. Project: Phased Vertical Array I've been thinking about the most effective antenna I could build for 40 meters. (The lengths of the rope supports are misleading in the diagram, by the way. com: 6 meter vertical antenna. The photo to the right is an example of how the antenna may be supported with minimal holes or damage to the wall. So in this case, we want to build an antenna for 6 meters, 50. 131 - Coax-Cable Collinear Antennas. ) Listing on the vertical is still very noisy. Several months ago, I wrote regarding my homebrew vertical for 20-17-15-12-10. A tuner will probably be needed for 10, 18 and 24 MHz Band operations. I am active in 40, 20, 15 and 10 meter band using low power for QSO. 80-meter dipole and I really enjoy CW on that band. Figure 2 — This shows the superior front-. It is just at the right edge of this photo, almost invisible, a stealth antenna! 20+15+10m - I'm very slowly building a 2-element instant-reverse 5-band quad. Clear Answers for Common Questions. Getting back on the air researched several wires which would fit my garden, tried a home-brew Carolina Windom and hey presto its a gem on all bands but Top Band. Larry Banks, W1DYJ 1Notes appear on page 40. It is best described as an end-fed vertical Zepp made from 'specialty' co-ax cable. Wire Antenna Calculator. It is a design that performs well and exhibits low input impedance, making it ideal for use with ham equipment without the need for. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. It's an 1/8 wave vertical on 160 meters also. W4ZCB is situated on a small mountain in North Carolina. Home • Products • Technical Info • Sample Photos. Since the picture was taken, I've added a coax balun at the feed point similar to that shown in the ten meters antenna pictures. Here it is set up in the garden for testing on 145. THIS PAGE IS ABOUT HOMEBREW ANTENNAS: Antenna Basics -- Excellent Tutorial From Scott's Pages Antenna Theory 101 -- Excellent Tutorial From KD4SAI Antennas from QRZ Shareware -- over 40 antenna files ARRL Antenna Projects Loaded With Many Antenna Projects AA3PX Antenna Page -- Conversations with Dr. Full 20 meter band coverage is available by simply telescoping the tubing to 16. this number, the loss resistance decreases the antenna efficiency by 30% to 50% for a 0. July 19, 2014September 17, 2014 Vertical Delta Loops 2929 Polarization of Loop Antennas • HF DX signals are constantly changing in polarization • The loop may be vertical or horizontal depending on feed point • Vertical polarization is preferred when antenna is low • DX rule is to feed the loop for low radiation angle. If you put the feed point on a corner (of a square shape) it will be half vertical and half horizontal. Written By: Scott Wolfington The following article is based on a HamUniverse. The antenna offers. Collinear antenna building, by Karl Shoemaker, AK2O. Performance-I have no accurate method to measure forward gain, but I reckon it is the text book 6-7 db. 092 wavelength long. However, almost any combination of ham sticks can be used. This seemed a good one to try, so I took a yellow toroid I'd saved when scrapping a PC. The SWR was 1. The longest piece must fit inside my suitcase (20 in / 50. Regarding QSL cards, I'm trying to collect as many that I can manage. This antenna is an excellent performer, and ruggedly built. This allows the antenna to be lowered and adjusted for maintenance and tuning. Hi all, I braved the cold and put up a vertical HF antenna last week, about 5 metres tall. I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax. This was created as a fun project to demonstrate how to enjoy operating HF in the field with a home-made portable antenna without spending a ton of money. The antenna can be mounted on the ground or on a mast. I bungee tie the Jackite to a bollard, tie on the wire to the eyelet and extend the pole. This is a quick way to add 80 meters to the 5 band pipe vertical that is half wave on 20 meters designed by KL7JR. "The Poppet" is a half-watt AM transmitter designed by Mr. This antenna is 58 ft tall and is mounted on a hinged base. A Linear Loaded Vertical Antenna for 40m and 80m by PA3HBB As a lot of you will appreciate, to work good DX requires a low angle of radiation from the antenna. Today was a good antenna day. REFERENCES:. Not having a lot of room for 40 meter beams, I decided to use the space I do have, which is a long wooded fence in the backyard. In this section, I will show you how easy it is to build an effective DX vertical antenna for any of the low bands. Richard Lau) at Nibong Tebal, South of Seberang Perai, Penang. Rather than risk ruining the old rig or damaging the Drake MN-4, I decided to keep this antenna strictly for 20 meters. I am trying to figure out how to get another one and get it “portable” for field day (I need to figure out the financial […]. vertical radiator. Browse your favorite brands affordable prices free shipping on many items. Here is the vertical up and swaying around in the wind. This was created as a fun project to demonstrate how to enjoy operating HF in the field with a home-made portable antenna without spending a ton of money. This multiband vertical designs provide 9 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30, 40 and 80 meter bands. 20 meter homebrew vertical << < (4/5) > >> Dale Hunt: A 5/8 wave vertical for 20m may not be a bad choice if you also want to use the basic antenna on the lower bands as well. All Bands Vertical Antenna-HF (homebrew) A few months ago my friend 9W2 AYR(Anuar) and I visited my new friend 9M2LR (Mr. QRPGuys Portable 40-30-20m Tri-Band Vertical Antenna - $20 With permission from Joe Everhart, (N2CX), we have adapted his 40-30-20m portable vertical antenna design using switched toroids for the base loading inductance into a lightweight antenna for an easy outdoor setup. Tilted Folded Dipole Antenna 16 25. Two double-ext Zepps shared with 160. There is even a 17 meter DX version available from some suppliers and homebrew designs are online. We are also currently working on designs for Vertical Antennas, so check back with us for updates. k8yio 23,199 views. amateur » Antenna > 160 thru 20 meter homebrew vertical system Reply: Page 2 of 2 I am starting to work on something to use on 160 thru. For a while I used antennas for other bands with a tuner to get on 30. I finally got the PVC cover on the 40 meter helically-wound antenna I started back in April. In the drawing above, it is shown for just four bands, 80 thru 10. This is a real flagpole multiband vertical. amateur » Antenna > 160 thru 20 meter homebrew vertical system Reply: Page 2 of 2 I am starting to work on something to use on 160 thru. My first 20 meter delta loop was mounted kind of low to the ground, but it did okay. The loop is an inverted vertical triangle with the base along the top and what. Tuning the COM-20VA 20 Meter Vertical Antenna is straightforward and intuitive. Overall length is 40 ft. With 10 ohms ground loss, the efficiency is 33% Assumes no trap/inductor losses Now your 100 watt transmit signal results in only.