Homebrew Dual Band Antenna

Complete antenna / mount units incorporating either a 2" or 3" extra-strength magnetic base with a whip antenna, "mini mag" antennas come with premium quality stranded coax for maximum durability. Details about DBJ-1 Dual Band VHF/UHF 2 meter/70cm ham base antenna. They use "B1B" SPST vacuum relays from Russia. As I was setting up my amateur radio station, one requirement was for 2M and 70cm antennas in two locations. 5 dBd on 70cm bands and it is fed via single 50 Ohm cable (use as short as possible for comfortable operation). New May #Vbuildathon **Homebrew Satellite Antenna and Diplexer** We are hosting our second virtual build a thon in May, this time we will be exploring Satellites and how to get on them and use them. This is because its. First, connect the USB WiFi adapter and USB extension cable. you will need 1/4 wl radials for each band if you are looking to make that vertical as efficient as you can. tram 1481 dual band base antenna 2 meter - 440 8. Vertical HF Multiband-antenna V8 - 9A4ZZ Uvod Radeæi na konstrukciji veoma kratkih antena, odluèio sam napraviti KV multi-band-antenu, prikladnu za portablrad i fiksni rad, po ugledu na komercijalne radioamaterske antene. This 37 in. VHF/UHF Beam Antennas. com, 4/9/12 Introduction Having limited space led to the design of this multi-band antenna array, which has a foot print of. Lowell, N1LO Moxon Antenna Projects-- 17M and 20M Via KD6WD. Dual band Jpole antenna This article taken from QST September 1994 is about a vertical dual-band antenna for 144 and 430 MHz made with a TV twin lead and coax cable. I should note that I can apply this to the homebrew Buddistick I built years ago which would make sense in a multi-band use scenario. My main shack location has a commercial 2M J-Pole Dual band mounted on a short mast. Sirio Antenna : - CB & 10M VHF (30-300mhz) UHF (0. In relation to the circular polarization, it usually uses four phased ¼ to produce this kind of polarization. Arrow II Dual Band Handheld Yagi 3 Element Beam on 2 Meter, 7 Element Beam on 70 cm This model does NOT include the 10W Duplexer. The goal here is to put up a cheap, easy, and quick 2-meter antenna that is simple and unobtrusive, but works quite well. As we all know, the antenna is the most important partof any transmitter system. Fortunately, I suspect more thanks to DK7ZB's design than to my skills, the antenna was right on the button when installed on my roof with SWR's of 1. Mobile Antennas. Antenna was designed by Kent Britian, WA5VJB, and full credit (and blame) belongs to him on this design! This antenna is ideal for rovers, and is good for a fixed station on a budget. 2 m 2m 70cm 2m antenna 2m/70cm 50 ohm 70 cm 70cm 70cm antenna aerial aluminium amateur amateur_radio antenna band bandwidth beam boom coax coaxial design directional director driven element dual band dual band antenna durable easy to build element feedline frequency gain ham Ham_Radio ham_radio_antenna parasitic array polarised polarized. Homebrew Satellite Antenna (created 16 September 2003) The Arrow Antenna is a design classic: it combines light weight, compact design and functionality in a single package for operating FM dual band satellites such as AO-27, UO-14, SO-41 and SO-50 (and I've had lots of success on the linear transponder birds too with this antenna). 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. 174 - Stub Matching Antennas. Chuck Duey, KI0AG, [email protected] homebrew collinear j pole for dual band vhf uhf antennas. 5 GHz Microwave bands. a bit for use on the 10-meter amateur band. Optimized for 144 - 145 MHz or 144-146 MHz and 432 - 434 MHz or 430 - 440 MHz. Bugstick for 20m-10m. I built a 80 meter vertical, then put a matching network at the base for 40 meters. I bought 4 mobile stick antennas for $20 and used two of them plus a structural T tie bracket (reformed with a hammer while in my vise), mobile mount stud for the hot leg, 3/8-24 bolt through male to male adapter from a spring mount for the ground leg. The problem is, if you place your 40m resonance in the middle of the band, the 15m resonance is too high. 5" from base to start of coil, which I assume is quarter wave for 70cm after VF is figured in, and the coil would cancel out the higher frequency. However, there are more exciting developments…. Covering 144 Mhz - 146 Mhz and 430 Mhz to 440 Mhz. My friend has some repeaters that are 51 miles from me and there are lots of mountains and tall hills between us. Antenna MAKERS CONTRUPTIONS for: Breakfast, = LUNCH= and DINNER! Also please note that, we for NOW, do not list the Hi-Q-2. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. This post is for Ed Fong's "DBJ-1" and "DBJ-2" designs. (Step-by-step instructions with photos can be seen below, following the project description and safety disclaimer. on-line plans for dual band antennas that I can build _without_ benefit of a antenna analyzer or 70cm swr bridge. Tram 1480 Amateur Dual-Band Base Antenna: 8' tall. My main shack location has a commercial J-Pole Dual band mounted on a short mast. Reduce precipitation static and lower background noise with the Tram Amateur Dual-Band Antenna. For example, vertical dual band antenna made of steel wire 0. This just happens to be the way I built mine. Any ideas? My homebrew 2-meter j-pole (made from 450-ohm ladderline) is also. How to increase the range of a radio scanner Use an external antenna. This just happens to be the way I built mine. 5 to 30 MHz and the medium AM band (540-1750 kHz). Mine came in a bit high thanks to a foamy dielectric. Making a Coaxial Dipole If you start with a common half wave (λ/2) stainless whip and extend it all the way down through a λ/2 long support tubing, Homebrew Coaxial Dipole for VHF or UHF Here’s a base station antenna you can easily build for 146, 220 or 440 MHz. They are made with the best materials and top of the line workmanship. Q: I built the dual-band J-pole antenna from the article in the September 1994 New Ham Companion (“An Easy Dual-Band VHF/UHF Antenna,” page 61), but I just can’t get it to work. Point in direction of your QSO for more direction of your output power. DBJ-UHF was developed from a grant from AC Daughty to develop a low cost medium gain MESH antenna for UHF. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable ‘roll up’ antenna, if made out of 300Ω or 450Ω ladder line / twin feeder. Before I built any home-brew mobile VHF antennas, the only VHF mobile antenna I had was an MFJ-1724B Magnet Mount Mobile antenna. Hands down best 2 meter base vertical antenna. There's other types of designs out there on the web for "true dual band" twin lead, J-poles, including a lot of 450 ohm ladder line designs. BITX Dual Bander; Artificial Ground; Cables and Connectors; SWR cum Power Meter; Grounding the Station; Check Points For Kit Builders; Antenna & Design. Easy VHF Antenna A New Way to build a 1/4 Wave Ground Plane Antenna Finally, an improvement on the SO-239 1/4 wave Ground Plane Antenna!The completed SO-239 Hub. Home Brew dual band antenna Generally speaking, this is a dual band design focused with better performance on UHF. 22 Different Wire Antennas. VHF & UHF Monoband & Repeater. Now, on to something more practical. Before starting to build the antenna, you can stiffen. It's easy to install on glass windows or other non-conductive surfaces. This would be for mounting at home, not mobile or portable. Hi there I like to build a Homebrew 2m, 70cm mobile antenna with a BNC plug to put onto a magnetic base that has the BNC ready for it. Inverted-V Beam Antenna for 30m 40 64. It doesn't work as well as a RS Discone and the match is terrible except in the 2m ham band. Dual Band Vertical for 145 and 430- MHz. The tubes were cleaned with paint thinner, sanded to fit well, and then lubricated with LPS. It also has the coax cables to connect your radio to the antenna. The loop can be opened at one corner, which allows for fast and very small packing. 2M Aluminum Slim Jim Antenna. 44" for improved reception. The Dual-Band Open-Stub J-Pole Antenna Built out of heavy duty 3/16" angle aluminum, UHF SO-239 connector with 3/8 aluminum elements and all stainless steel hardware. It is drawn this way just to provide a sufficient number of turns for tune-up. Figure 2--This EZNEC plot shows the difference in the radiation patterns between a vertical half-wave radiator operated at its fundamental (146. It outlines how to build yagis for 144Mhz, 220Mhz, several different 440 band frequencies, 900 Mhz, and 1. High-Gain Directional Yagi Cellular & PCS Antennas wpsantennas. 172 - Resonant Feedline Dipole Antenna for 80m. Quads— Design-A-Quad Antenna Quads — from IZ7ATH. The "Dual" company has been producing antennas for more than 25 years. The 2-Meter 300 Ohm TV Twin-lead Roll-up J-pole. The Super J-Pole Antenna(Collinear Design) Below is a Javascript for calculating the lengths of tubing to be used for the construction of a Super J-Pole. 5/1 at the upper edge. We'll try to answer these questions to make HAM simple. Dual band Jpole antenna This article taken from QST September 1994 is about a vertical dual-band antenna for 144 and 430 MHz made with a TV twin lead and coax cable. Antenna MAKERS CONTRUPTIONS for: Breakfast, = LUNCH= and DINNER! Also please note that, we for NOW, do not list the Hi-Q-2. Disadvantages. pdf , and easy Jpole antenna. Cut it two feet or so long if you prefer removing wire instead of adding. The radiation pattern width is 90° horizontal and 110° vertical in the cellular band and 70° horizontal and 85° vertical in the PCS band. I have inserted two additional links for coverage on 17m and 30m. The FRI-Match for A Homebrew Antenna Tuner. Easy VHF Antenna A New Way to build a 1/4 Wave Ground Plane Antenna Finally, an improvement on the SO-239 1/4 wave Ground Plane Antenna!The completed SO-239 Hub. The final product may vary from. SUPERIOR Quality VHF / UHF Dual band base antenna with radials. 4 elements VHF and 10 elements UHF. so a dual band j-pole is a must. 4GHz Outdoor Antenna We quote the true output gain for all of our antennas, not the front to back ratio unlike some other manufacturers - please be sure to check specifications if buying elsewhere. Sirio Antenna : - CB & 10M VHF (30-300mhz) UHF (0. Fortunately it is possible to build one antenna that can be used effectively on most of the bands, for example this 80 meter loop antenna. 0 Antenna was designed with weight, portability, versatility and cost in mind and is ideal for RV/camping, hotels, apartments, condominiums, homeowner’s associations, deed restrictions and CCRs (Covenants, Conditions & Restrictions), Shortwave Listening (SWL) and other places where it is not feasible to erect a multi-band. The most common linear antenna used is an omnidireccional whip antenna, because directional antennas will drastically reduce the sole of the satellite. For the most part, this is true. Single 5/8 Flower Pot Antenna. I figured to try them both out and share my feelings about each one. Screw the. For example, ten turns, as shown in Figure 4 will resonate below the band in all situations. All information, images, and documents on this website are the sole property of Hygain Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Hygain. We supply variety of dual band yagi antenna, yagi directional antenna, yagi antenna, homebrew yagi, vertical yagi antenna, portable yagi antenna, wifi yagi antenna and many other types of antenna. This is important because if the mast extends above the antenna ground plane it will affect the performance of the antenna. I have almost completed one and have yet to add the feeder to complete the first attempt. So I would like to take this opportunity to recommend DK7ZB's website to anyone considering building their own vhf, uhf, or dual band antenna. 4:1 at 144MHz rising to 1. About Mobile Dual-Band 2m/440 -- Roger K6XQ advises-Can I build a 2m/440mhz 5/8 mobile antenna? A 1/4 wave on 144 MHz is 3/4 wave on 440. If you desire the absolute maximum coverage area, this is the antenna to choose. Powerwerx offers communications and DC power products including Anderson Power Products, fuse blocks, USB mobile chargers, auto-off mobile timers, desktop power supplies, DC circuit breakers, stranded hookup wire, welding cable and panel mount products. One of the members commented to me that I should write an article about collinear arrays so that we could all build our own. The CA-2x4SR is a broad-band antenna designed for those needing voice communications on the ham radio, public service, land mobile, and FRS frequency ranges. AMATEUR BASE ANTENNA works with ICOM KENWOON YAESU. We offer a huge selection of Yagi antennas, including cross-polarized and circularly polarized, from top brands like M2 Antennas, Cushcraft, MFJ, and Diamond Antenna. Welcome to Elk Antennas! Log Periodic Antennas for the Radio Amateur Elk Antennas was started to give the Ham the best Log Periodic antennas with the best gain, directivitiy, and front-to-back ratio possible for the size and price. Homebrew Satellite Antenna, G6LVB The antenna is lightweight, only 19 ounces (550g). Its certainly a rare looking beast My first impression on looking at the Swiss Quad is that it would not last 5 minutes on top of my mountain But apparently it is a very effective antenna why not take a look and make up your own mind. 80m & 40m DUAL BAND HOMEBREW 2 EL SHORT BOOM YAGI by VE6WZ. 44" for improved reception. · Antenna Preamplifier 100 kHz to 220 MHz · UHF TV Preamplifier 25dB Gain · LNA for UHF Band BFP540 · High IP3 HF LNA · L-band Low Noise Amplifier · 950 MHz - 2150 MHz LNB · HF Preselector - DL2JDN · 3. The CHA F-LOOP 2. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. As I was setting up my amateur radio station, one requirement was for 2M and 70cm antennas in two locations. The most common linear antenna used is an omnidireccional whip antenna, because directional antennas will drastically reduce the sole of the satellite. It appears the engineers and product teams did not share much information back in the day of its design. It's easy to install on glass windows or other non-conductive surfaces. Antenna Experts manufacture ultra wideband passive discone antenna from 20 - 6000 MHz frequency band which are suitable for receiving, transmitting, scanning, monitoring and jamming applications. It is designed to meet your need of owing an ideal vehicle radio which is professional, safe, durable, comfortable and simple to use. It consists of the transmitter and the receiver are assembled in an integrated way. 62 - Dual-band Loop Antenna for 30m - 40m. 5" from base to start of coil, which I assume is quarter wave for 70cm after VF is figured in, and the coil would cancel out the higher frequency. Prototype # 1 was a "Dual Band" (40 -20 Meter) Parallel Dipole Antenna, each Dipole is a "Cage Dipole" SWR was BELOW 2. Since I planned to use this antenna for the 10-meter Novice/Technician phone sub- band, I decided to aim for a resonant fre- quency of 28. The dipole antenna is said by many to be the perfect antenna for a specific frequency. A Portable 2-Element Triband Yagi Have you ever dreamed about a por-table beam you could use at your summer cottage, while camp-ing or on Field Day? Dream no longer. About Mobile Dual-Band 2m/440 -- Roger K6XQ advises-Can I build a 2m/440mhz 5/8 mobile antenna? A 1/4 wave on 144 MHz is 3/4 wave on 440. 0 dBi gain in the cellular 824-894 MHz band and 10. Using an open-wire parallel feedline (commonly called "ladder line") with an antenna tuner, it tunes up on the 10m band as a 5/8-wave loop as well. Cheap Homebrew Dual Band Antenna. you could spend more, or less, and still get a decent dual band antenna. But, in practice, the impedance of the antenna varies within the 4G LTE and 3G frequency ranges, so there's no way to be perfectly impedance-matched across the entire band of interest. 61 - Tri-band Delta Loop Antenna for 80m - 40m - 30m. Since most handheld dual-band radios have a single antenna connector (VHF. SUPERIOR Quality VHF / UHF Dual band base antenna with radials. Dual Antenna Stacking Boom For A430S10 Phasing Harness for Stacking. It can be built for around $15-20 (1999 dollars). It uses Glassfibre arms (a must). 2 meter collinear. VHF-UHF ANTÉNY · · Home Brew dual band antenna A dual band design focused with better homebrew your own external GPS antenna from commonly available. I then began research on what it would take to make this antenna perform well on 2m and 70cm. A few contacts with the UK showed that the antenna is working great ! A closer look at the connection box and attached Aircell-7 coax. Key Features The antenna horizontal pattern is field adjustable for any current or future coverage requirements. As I was setting up my amateur radio station, one requirement was for 2M and 70cm antennas in two locations. If you have an antenna analyzer, you can test the antenna at your workbench to check that everything is properly connected before going out into the field. 60 - Lazy Quad Antenna for 10m. you will need 1/4 wl radials for each band if you are looking to make that vertical as efficient as you can. V85 Stock UV-5X3 & BF-F8HP Antenna. Short 'Rubber Duck' for VHF/UHF Hand - Held. You don’t need much for listening to the VLF band, only SAQrx and a simple amplifier connected to a small probe – that what we call an active E-field antenna. If you want a terrifically performing dual band antenna for 2 meters and 70 centimeters, give my Mighty Woof a try! I've made contacts up to 30 miles away with a 5 watt HT using it. 'PORTABLE' dual-band "J" for hotel travelers, restricted apartment dwellers, or for limited balcony/patio use. 178 - RCA Spiderweb Antenna for 40m to 6m. Dual Band Antenna V~UHF (High Gain) VHF Vertical Antenna; Portable Yagi for 2M and 70cm. The antenna I constructed was made of 1/2" tubing. Magnetic Loop Antennas for The Radio Operator with Limited Space pt. I was given the Arrow Satellite II from Arrow antennas and a dual band Log Periodic from Elk Antennas. Discone Antenna for the 2- meter Band. I am also a ham radio operator, so i use my 2m/440. Optimized for 144 - 145 MHz or 144-146 MHz and 432 - 434 MHz or 430 - 440 MHz. vhf - uhf band plan chat j-pole antenna super j-pole antenna cubic quad antenna arrow antennas dual band j-pole note: this antenna was disigned by arrow antennas and it works great. The JTH4 is nice when im out and around but at home I have a hard time finding my sweet spot so a better outdoor antenna was my choice. There seems to be alot of crackling on some frequencies, not sure what the issue is, though the signal strength is S9++. A dipole is basically a mono-band antenna. 80/40m Dual Band Bazooka Antenna- PLEASE NOTE: This antenna can only be shipped inside the United States. Then , TA TA. Cheap Homebrew Dual Band Antenna. At this time the antenna is only constructed for 2m. See more ideas about Ham radio antenna, Ham radio and Ham. Home-brew Compact 6dBi Collinear Antenna (first published September 2005, details of higher-gain version added July 2013) This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802. I have almost completed one and have yet to add the feeder to complete the first attempt. Loop Antenna for 10m 35 59. 11b/g wireless networking. Since I had a Metal Fabrication background, I thought this would be an easy build. 'PORTABLE' dual-band "J" for hotel travelers, restricted apartment dwellers, or for limited balcony/patio use. but on the UHF site ,have to test with my FT897. This antenna is perfect for HAMS that need a quick reliable solution for local 2 meter communication. has been designing and building cubical quad antennas for amateur radio operators around the world. Only one problem: most hams do not have space in their yard for 10 different antennas. 1 dBD, includes BNC connector. SWR adjustment with a plastic screw at gamma match feed. QRP Multi-band HF EFHW antenna for SOTA Post updated 29 September 2017. Mobile Antennas. This article explores how to get the best performance out of your analog or digital radio scanner. com, 4/9/12 Introduction Having limited space led to the design of this multi-band antenna array, which has a foot print of approximately 15 feet. This will direct more of your output power when transmitting at the same time reducing interference and increasing signal strength when receiving. It's features up to +10. My friend has some repeaters that are 51 miles from me and there are lots of mountains and tall hills between us. Looking for a homebrew dual band 2m/70cm antenna project. 5 SWR I think it is still ok la. Parabolic antennas continue to dominate the single satellite application. I was given the Arrow Satellite II from Arrow antennas and a dual band Log Periodic from Elk Antennas. Click the button below to add the Tram 1185-SMA Dual Band Magnet Mount Antenna with Male SMA to your wish list. The intent is to add, in the new couple of weeks, a Little Tarheel 2 for HF with a Diamond dual band antenna for VHF/UHF. SWR adjustment with a plastic screw at gamma match feed. Next, plug the antenna into your computer using the extension. Disadvantages. 3-3 GHz) Dual-Band Wide-Band Cellular (Mono/Multiband) DECT Wireless WLAN System WiMax System Aircraft Band (118-136mhz) Marine Band New Products News Custom Antenna Design sirio antenna, High end HF VHF UHF antenna, CB Antenna, 10 Meter Antenna, dual band antenna, wide band antenna, wireless product, cellular multiband antenna, dect system. I must compare the IOio antenna with the Arrow antenna because it is our reference antenna. " QST, Dec 1978. prcguy Note: The first antenna to the right of the big Bicone is the top of a 6dB ish gain 225-400MHz antenna, the next one to the right is a dual band 118-136 and 225-400MHz, the next to the right is a KRECO 100-800MHz Discone the the other Discone is. I had experimented with. A few contacts with the UK showed that the antenna is working great ! A closer look at the connection box and attached Aircell-7 coax. pole into a dual band J-pole DBJ-2 was developed from the successful performance of the DBJ-1 but folks requested a portable version. In part one of this series, I covered the use of one brand of commercially available, small transmitting loop antennas, also known as 'magnetic loops'. Hi there I like to build a Homebrew 2m, 70cm mobile antenna with a BNC plug to put onto a magnetic base that has the BNC ready for it. Design Goals and Objective: To construct a pair of compact, band-specific 6 and 10 meter dipole antennas resembling the active element of a yagi beam antenna, constructed of durable weather worthy components. I was immediately intrigued. The duplexer discussed here is designed specifically for the Arrow dual band satellite antenna. I easiest dual band (144/440 MHz) antenna to build from materials available at ANY hardware or building supply store is the J-Pole antenna. Last week we had a pretty bad weather event and we had our local weather net up. 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. A good duplexer can make the difference between hearing AO-27 full quieting and hearing a bunch of muffled static. There seems to be alot of crackling on some frequencies, not sure what the issue is, though the signal strength is S9++. Dual Ham-Stick: This is a portable antenna that does well under ARES/RACES. The performance of the indoor antenna is good, moved outside on a flipped-over garbage can it is great, but the performance of this rooftop loop is spectacular! Simply tune the radio to the desired frequency then tune the antenna for maximum noise, switching the band somewhere around 12 to 15 MHz. The radiation pattern width is 90° horizontal and 110° vertical in the cellular band and 70° horizontal and 85° vertical in the PCS band. They are available in VHF, UHF, 800, 900, 1850 and Dual Band (VHF / UHF, Cellular / PCS) frequencies in unity, 3 dB and 5 dB configurations. jpole-dual-band. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. 5/1 at the upper edge. See more ideas about Ham radio antenna, Ham radio and Ham. Some big changes at the mast, and wow does it make a difference: Homebrew dual-band 13 & 23cm dish, with the secret ingredient: three bags of rice. com offers the highest gain Yagi directional cellular antennas on the market from Wilson Cellular, Digital Antenna, and Cushcraft. For W-band operations a dual-and a reflectarray surface focuses its energy in azimuth and elevation. Performance is equal to. TWO ELEMENT PHASED VERTICAL SYSTEM "Christman Phasing" by W4NFR 5-22-2011 I have always been curious about vertical antennas and how to make them efficient. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. 1, sometimes much less. SUPERIOR Quality VHF / UHF Dual band base antenna with radials. A Homebrew Magic Band Beam (With an Update) 24 April 2016 I had a television antenna, 5 element beam and a dual band vertical for 2/70 to get back up in the air. I needed to make this longer though so I could run high power in a comfortable manner. It is available in HAM (144-148 MHz and 440-450 MHz) or Commercial (152-157 MHz and (460-470 MHz). G0KSC - Free Antenna Designs for Ham Radio. The Directional High Gain WiFi Parabolic Grid WiFi Antenna offers 24dBi gain at the connector and a tight 8 Degree beamwidth. If you desire the absolute maximum coverage area, this is the antenna to choose. (Step-by-step instructions with photos can be seen below, following the project description and safety disclaimer. This is K8NDS theme and variation on the magnetic loop antenna. home made collinear antenna. 7:1 at 146 MHz, indicating that the antenna is a bit long. This is important because if the mast extends above the antenna ground plane it will affect the performance of the antenna. 4GHz Outdoor Antenna We quote the true output gain for all of our antennas, not the front to back ratio unlike some other manufacturers - please be sure to check specifications if buying elsewhere. They are broadband and are ideal for point-to-point applications. Tri-band Delta Loop Antenna for 80m - 40m - 30m 36 60. You are eligible for a full refund if no ShippingPass-eligible orders have been placed. The military uses a dual band NVIS antenna known as the AS-2259/GR. Dual band antennas definitely seem to be all the rage, but I’m also interested in antennas that will give me solid performance on the bands I use most often. Electronic surplus can be. Model # Band Stacked Element. 4 elements VHF and 10 elements UHF. This picture shows that the base of the antenna is mounted flush to the top of the mast. Dual Band (2M/440 MHz) Walking Stick Antenna Antenna Page - VHF / UHF designs Home Brew dual band mobile antenna - A 1/4 wavelength resonator for both the UHF and VHF bands Antenna EiRP calculator Calculate Antenna & Cable losses Antenna Trap Designer HF- Antenna trap design Audio Filter Designer Calculate component values for active audio filters. After consulting many of the available Internet sources, and by combining ideas, I was able to assemble an antenna that performed well, even under poor band conditions. Antenna Theory The page is not strictly related to amateur radio antennas but the theory is universal W8JI A plethora of great antenna types plans & builds plus many other useful topics with explanations & clarification PG1N The mother load of home brew HF, VHF & UHF antennas, single & multi band dipoles plus many others. The sloper's feed point is anchored high above ground near the top of the tower on which sits a grounded HF yagi beam antenna. 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. This antenna is perfect for HAMS that need a quick reliable solution for local 2 meter communication. My next project will be either a 2 meter band version of this or a 3 element beam of this 70cm band Quad antenna. Every component of all of our products are Made in the USA. You will need basic workbench/shop tools for cutting a drilling metals (e. Rialto Amateur Radio Club. The Antenna. 7:1 at 146 MHz, indicating that the antenna is a bit long. A dipole is basically a mono-band antenna. They are broadband and are ideal for point-to-point applications. Dual Band J-Pole Antenna Drawing. Post #1065. The DARA Thursday Night Group version will use Romex for the wire. 63 - Wire-Beam Antenna for 80m. If you like to listen to foreign broadcasts from rare places or just your homeland, this antenna is unbeatable. All design information and credit goes to Justin, G0KSC and as I'm sure many of you will have already discovered Justin has a lot of useful build tips on his web site. Instead of a solid loop, Rich winds flat copper strap around a helical form made out of PVC pipe. Tri-band Delta Loop Antenna for 80m - 40m - 30m 36 60. com offers the highest gain Yagi directional cellular antennas on the market from Wilson Cellular, Digital Antenna, and Cushcraft. 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. DB-2345 supplies 8 dBi gain on 2-meters and 6 dBi gain on 440-MHz. Dual-Band HF Antenna (by SV1XY) 40m "plus" 10m Band : Windom Antenna: Homebrew "Off-center" HF Multiband Antenna : L-P-T Antenna Tuner "One-box", triple-type HF Antenna Tuner: Antenna Box: HF Antenna Distribution box. 4 elements VHF and 10 elements UHF. If you decide not to solder to the tape measure elements, there are two other methods that have been used to attach the feedline. Homebrew 70cm Yagi I built a simple six element 70cm Yagi antenna today in hopes of hearing some of the mounbounce signals from the Arecibo radio telescope in Puerto Rico on Apr 16, 17, 18. 4:1 at 144MHz rising to 1. I also use my Kenwood TH-D74a which does surprising well as a mobile radio using the same Diamond dual band antenna - with the added benefit of also having DSTAR and APRS. This revision is easier to build while becoming more robust and durable than my previous design. Cheap LEO Antenna Drew, KO4MA, using the Cheap LEO antenna during a Dayton AMSAT LEO Demonstration Hand held dual band antennas are popular for QSO's through many of the Low Earth Orbit (LEO) satellites. com, 4/9/12 Introduction Having limited space led to the design of this multi-band antenna array, which has a foot print of approximately 15 feet. I was immediately intrigued. Parabolic antennas continue to dominate the single satellite application. The intent is to add, in the new couple of weeks, a Little Tarheel 2 for HF with a Diamond dual band antenna for VHF/UHF. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. Antenna MAKERS CONTRUPTIONS for: Breakfast, = LUNCH= and DINNER! Also please note that, we for NOW, do not list the Hi-Q-2. com, 4/9/12 Introduction Having limited space led to the design of this multi-band antenna array, which has a foot print of. (there is plenty of overlap). The goal here is to put up a cheap, easy, and quick 2-meter antenna that is simple and unobtrusive, but works quite well. Greg R Burnett. Homebrew VHF/UHF Ground Plane Antenna Not to Scale 20 ¼” Radial 6 ¾” Radial Attach each radial with a 6-32 screw, lockwasher and nut 20 ¼” Radial 6 ¾” Radial Slowly twist the wire while pulling it to keep it taught. Instead of using link coupling to the antenna, his design uses capacitive coupling to the main coil. Details about DBJ-1 Dual Band VHF/UHF 2 meter/70cm ham base antenna. The intent is to add, in the new couple of weeks, a Little Tarheel 2 for HF with a Diamond dual band antenna for VHF/UHF. sampling of some of the antennas used to complete 6m eme contacts with w7gj Most of the stations contacted on 6m EME have used horizontally polarized yagi antennas, JT65A mode , at least several hundred watts, and ground gain when the moon was near their horizon. He is credited with original article in QST magazine. Key Features The antenna horizontal pattern is field adjustable for any current or future coverage requirements. tram 1481 dual band base antenna 2 meter - 440 8. ZL-Special Beam Antenna for 15m 41 65. Post #1069. The photo to the right is an example of how the antenna may be supported with minimal holes or damage to the wall. AHARS / LMARC J-POLE DUAL BAND ANTENNA 2mtr (146 MHz) and 70cm (432 MHz) This antenna provides a dual band 2m ~ 70cm antenna for base and portable application. Post #107 Magnetic Loop Antennas; A Simple Short Vertical HF Antenna. It is a Boomless (spider quad, gem quad)design. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' antenna, if made out of 300Ω or 450Ω ladder line / twin feeder. Magnetic Loop Antennas for The Radio Operator with Limited Space pt. The entire 2m band is typically under 1. Also, he includes a "coil" in the ground plane, but I've always thought this was unnecessary. VHF & UHF Monoband & Repeater. By combining signals from the horizontal and vertical feedlines of the dual-quad with proper phase relationship, you can achieve 45-degree and circular polarizations. This is my first home brew “DIY” antenna for use on local 2 meter repeaters and simplex frequencies. This is because its. I used almost exactly the same arrangement on the vertical radiator but instead of 2 19" radials and 2 6" radials I used 4 20" radials. Reduce precipitation static and lower background noise with the Tram Amateur Dual-Band Antenna. Microwave Antenna HandBook-- From W1GHZ Mobile Dual Band VHF/UHF Antenna-- Homebrew Project from VE3RGW Mobile Antenna Motorized, 98% plastic 5 ft long -- From VE3GK Mobile HF Antenna   By HB9ABX Moxon Rectangle Antenna Generator-- From Dan Maguire, AC6LA Pedestrian 5-Band Mobile Antenna - From W3FF. When I change bands I preset them, connect the RF-1 and adjust the tuner knobs for the lowest SWR. It is available in HAM (144-148 MHz and 440-450 MHz) or Commercial (152-157 MHz and (460-470 MHz). Thanks Cyril F4FUL, for your images. I easiest dual band (144/440 MHz) antenna to build from materials available at ANY hardware or building supply store is the J-Pole antenna. Here are a couple of pictures I took this morning showing my current Home Brew base antenna. The CHA F-LOOP 2.