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Homebrew Dual Band Antenna

Homebrew Dual Band Antenna

The antenna has a UHF connector and accepts a mast diameter of 1. This article explores how to get the best performance out of your analog or digital radio scanner. Free Online Engineering Calculator to find the Dimensions of a yagi Uda Antenna for a given Frequency Range and Length. This lightweight antenna is perfect to use for fox hunts or as a portable directional antenna for public service events. It is available in HAM (144-148 MHz and 440-450 MHz) or Commercial (152-157 MHz and (460-470 MHz). You can point the antenna at stations while you are in QSO with them. The 40m antenna needs to be about 15cm (6") longer on each side to bring the resonance down to about 21. It's also a great antenna for emergency communication and can be fabricated and launched in a matter of minutes. The Antenna was modelled at 10m above the REAL Ground whose Conductivity=5mS/m and Dielectric = 13. Created 28 May 2002. 80m Mobile Shootout Results. one Coaxial-feeder for 3 antennas. It has long been known that a 40m antenna will also work on 15m. diy collinear base antenna. Monoband Beams for 12 and 17 Meters I designed a pair of driver-director Yagis for 12 and 17 meters using antenna-modeling software, in this case, NEC-4. Amateur radio trends lean towards a dual-band antenna with 2m and. Antenna Polarization Switch. I built mine from 3/4″ copper pipe. It is our intention is to SELL the World Wide Marketing Rights for these two excellent Hi-Q antennas, because we are overwhelmed with. The Telewave antenna consists of a 4-element dipole array antenna with a precision phasing harness for optimum performance. Whether you're operating on 2 meters or you work in the 1. 61 - Tri-band Delta Loop Antenna for 80m - 40m - 30m. Dual Band VHF/UHF Slim Jim Antenna. You might want to tin the tape measure elements before mounting them to the PVC cross. 11ax | GL9X1AX-SF, GL7X1AX-SF, GL4X4-SF-PLK; Coach™ II GNSS L1 L2 L5 Multi-Band Antenna, Dual-Port 5G LTE and 802. 2 mhz will not really effect your antenna. This article first appeared in the Nov-Dec 1997 Amsat Journal. Optimized Wideband Antennas — P. Our multi-band antennas provide flexible multi-band use in a efficient, durable form. The goal here is to put up a cheap, easy, and quick 2-meter antenna that is simple and unobtrusive, but works quite well. TRAM Amateur Dual Band Base Antenna (1481) Choose Tram for your next antenna installation project with this Amateur Dual-Band Base Antenna! This 17-foot antenna has two frequency ranges: 144MHz to 148MHz and 430MHz to 450MHz. It can satisfy needs on most situation. 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. 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. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. 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. A Simple Homebrew Active Antenna. Free Online Engineering Calculator to find the Dimensions of a yagi Uda Antenna for a given Frequency Range and Length. This super efficient VHF / UHF antenna provides a OMNI directional 3 to 9 db gain depending on position and is usable in 4 positions. This article first appeared in the Nov-Dec 1997 Amsat Journal. 4 SWr on the whole 440Mhz band. Arrow antennas are hand held directional Yagi antennas made in America and a great accessory for the ham that wants a very directional, focused propagation of his transceiver radio so he/she can work LEO (low earth orbit) satellites and distant repeaters. 10-80 Meter 100W Alpha Loop 100W 10-40M, 20W 40-80. 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. It will find the minimum VSWR and corresponding frequency for each band but a. If it rises you have cut off too much. but on the UHF site ,have to test with my FT897. The Antenna was modelled at 10m above the REAL Ground whose Conductivity=5mS/m and Dielectric = 13. It can handle up to 150 watts. 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 proposed antenna would be operational over the entire 6Mtr band (50 - 54MHz) and the entire 2Mtr band (144 - 148MHz), slightly favouring the upper half of both bands. Dual-Band (UHF-VHF) J-Pole Ham Radio Antenna. The Antenna was modelled at 10m above the REAL Ground whose Conductivity=5mS/m and Dielectric = 13. Choose Tram for your next antenna installation project and stay connected with this Amateur Dual-Band Hi-Gain Hi-Power Magnet Antenna. A test with 40 meter half wavelength Inverted V antenna give S9 reports and the Shorty Dipole shows 20db over S9 on my S-meter. Items used are items from the "dollar box" at a hamfest tailgate and everyday hardware. Portable Handheld Flexible Antennas HT Rubber Duck. 2 meter home built collinear antenna. My main shack location has a commercial J-Pole Dual band mounted on a short mast. Here are a couple of pictures I took this morning showing my current Home Brew base antenna. For example: The 20-meter band covers 14. The Telewave antenna consists of a 4-element dipole array antenna with a precision phasing harness for optimum performance. ZL-Special Beam Antenna for 15m 41 65. Vertical HF Antennas - Yagi 6m Beam Antenna - Wire Dipole Antennas For mono, dual, and triband handheld radios Dummy Loads - Lightning Protection - Power Supply - Coax Switches - Cable Assemblies - Connectors & Adapters - Power/SWR Meters - Misc. I need to think what I “need” more at the moment. 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. Mobile Antennas. One inductance - a coil with taps on an iron powder. Homebrew Satellite Antenna, G6LVB The antenna is lightweight, only 19 ounces (550g). A friend of mine (KC0UYK) convinced me I should build this antenna and I’m certainly glad he talked me into it. It’s modeled after the basic delta loop design and is fed with a 1/4 wavelength of 75 ohm coax (RG-59U). 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. You will need basic workbench/shop tools for cutting a drilling metals (e. By the way, the 2 meter 3 element Quad homebrew version is described here very nicely. Before starting to build the antenna, you can stiffen. Two-Bands Half Sloper for 80m - 40m 42. This will direct more of your output power when transmitting at the same time reducing interference and increasing signal strength when receiving. diy collinear base antenna. VHF/UHF Beam Antennas. For nearly 48 years Cubex Co. For example, ten turns, as shown in Figure 4 will resonate below the band in all situations. A good duplexer can make the difference between hearing AO-27 full quieting and hearing a bunch of muffled static. Dual-Band 2m and 70cm Yagi antennas. 22 Different Wire Antennas. I call your attention to the AMOS/Franklin antenna, commonly used on 2. It is available in HAM (144-148 MHz and 440-450 MHz) or Commercial (152-157 MHz and (460-470 MHz). 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. 172 - Resonant Feedline Dipole Antenna for 80m. tram 1481 dual band base antenna 2 meter - 440 8. Instead of a solid loop, Rich winds flat copper strap around a helical form made out of PVC pipe. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. 5" radials for quick and easy installation. The antenna acts like a slim jim on 2m and a. Perfect gain and SWR on both bands. 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. Half-Sloper Antenna for 160m 41 66. Wire-Beam Antenna for 80m 38 62. This portable beam can be rolled up and stashed in your car’s ski boot! words, I look for the easiest way to ac-complish a goal that guarantees success. This picture shows that the base of the antenna is mounted flush to the top of the mast. My Shack Configuration - Spring 2002. 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. This antenna spins to orient a pattern of wires, known as an array in engineerspeak, toward broadcasting towers. Toll Free 1-866-666-8600. Today, I'm going to show you how you can easily build a homebrew 2 Meter ¼ Wave vertical antenna for under $10. Dual Band Half-Wave Flower Pot Antenna. This high quality compact antenna is light in weight but high in performance. When one finally tires of tweaking amplifiers and antenna tuners for VSWR, the famous Log Periodic antenna comes to mind. This 37 in. The 40m antenna needs to be about 15cm (6") longer on each side to bring the resonance down to about 21. Before starting to build the antenna, you can stiffen. In the drawing above, it is shown for just four bands, 80 thru 10. My friend has some repeaters that are 51 miles from me and there are lots of mountains and tall hills between us. I have done a bit with the Moxon antenna geometry and also a bit with the WA5VJB style Yagi-Uda so I am intrigued with the idea of combining the two like this, It's really interesting that you figured out a way to make it dual band without a physical electrical connection to the 70CM driven element, I'm assuming that's done with near field. 80/40m Dual Band Bazooka Antenna- PLEASE NOTE: This antenna can only be shipped inside the United States. It will find the minimum VSWR and corresponding frequency for each band but a. 2M Aluminum Slim Jim Antenna. 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. Post #106 How to construct a multi-band dipole using speaker End fed portable all band dipole setup and 150W ma $20 HF Portable Antenna Project. 5" elements -- ONE up and four down -- is easier to build, gives dual band performance at least as good as this more complicated version, and a significantly smoother omnidirectional radiation pattern. 11ax | GL9X1AX-SF, GL7X1AX-SF, GL4X4-SF-PLK; Coach™ II GNSS L1 L2 L5 Multi-Band Antenna, Dual-Port 5G LTE and 802. Dipole Antenna Length Calculator. 440 mhz ht 220 mhz ht 144 mhz ht 440 mhz mobile 220 mhz mobile 144 mhz mobile 144/440 dual band mobile 28/50 results are below: 220mhz base/repeater antenna w. 4 elements VHF and 10 elements UHF. After tuning, the SWR range across the entire band from bottom to top ranged from 1:1. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. The combination of the ATAS-100 and a good dual band 144 / 440 antenna works FB. Mobile Antennas. I was given the Arrow Satellite II from Arrow antennas and a dual band Log Periodic from Elk Antennas. Loop Antenna for 10m 35 59. Now to be honest I use what I believe to work the best for what this antenna is designed to be all the way around. A Simple & Cheap Dual band antenna will. But if you're the crafty type and enjoy a good challenge, you may want to homebrew your own antenna. The CHA F-LOOP 2. All readings were taken with a Array Solutions AIM-1470b Antenna Analyzer. (Step-by-step instructions with photos can be seen below, following the project description and safety disclaimer. My friend has some repeaters that are 51 miles from me and there are lots of mountains and tall hills between us. Optimized for 144 - 145 MHz or 144-146 MHz and 432 - 434 MHz or 430 - 440 MHz. The next antenna, and usually it is the first choice to erect, is the 40 meter Off Center Fed antenna, "model OCF40Q". Compact and effective 2m/70cm dual band antenna for satellite operation Antenna was designed for SO-50 satellite operation. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. This allows us to understand at the operating frequencies our antenna. As I was setting up my amateur radio station, one requirement was for 2M and 70cm antennas in two locations. 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. a bit for use on the 10-meter amateur band. 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. One of the members commented to me that I should write an article about collinear arrays so that we could all build our own. 2 METER/440 DUAL BAND SLEEVED DIPOLE MODIFICATION BY W7LPN Rick Frazier The photo above is of my balun modification of the QST August, 2006 page 50, 2 Meter/440 dual bander sleeved dipole by Geoff Haines, N1GY. I built a 80 meter vertical, then put a matching network at the base for 40 meters. 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. My main shack location has a commercial J-Pole Dual band mounted on a short mast. It can be built for around $15-20 (1999 dollars). Jerry, K5OE: Home Brew Amateur Antennas. Dual-Band Sloper Antenna 39 63. Tri-band Delta Loop Antenna for 80m - 40m - 30m 36 60. Enter the desired operating frequency in megahertz to get a good starting length for a dipole in both feet and meters. A useful article to read if you are looking to link buildings is Linking Buildings using Wireless. The above antenna works nicely but is not broad enough on 80 m. You might want to tin the tape measure elements before mounting them to the PVC cross. The problem is, if you place your 40m resonance in the middle of the band, the 15m resonance is too high. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. Parabolic antennas continue to dominate the single satellite application. I'm confident you will find this portable "J" will far exceed any other antenna, in the same setup, more than tripling your 2m &. KI0AG Micro-Duplexer. Stroobandt, ON4AA, in the year 2006. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. 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. The most common linear antenna used is an omnidireccional whip antenna, because directional antennas will drastically reduce the sole of the satellite. The CHA F-LOOP 2. 4:1 at 144MHz rising to 1. They also produced a trapped dual-band 4m / 6m yagi which was useful for those short of space and wishing to be QRV on both bands. The next antenna, and usually it is the first choice to erect, is the 40 meter Off Center Fed antenna, "model OCF40Q". Eggbeater II Omni LEO Antennas. 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. The Wire Size can range from 16 AWG to 12 AWG. See the comments above about running a grounded wire underneath this antenna for better efficiency. A unique method of fastening and isolating the elements to the boom is detailed and presented to the builder. 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. Short 'Rubber Duck' for VHF/UHF Hand - Held. coaxial is shorter. Replacement V-85 DUAL BAND Antenna $8. This calculator can be used to design a Slim Jim or a J Pole antenna. 1 dBD, includes BNC connector. , pages 147 to 151). 2 is a frequency approximately in the middle of the band, which gives a length of 468/14. 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. I saw the plans for this on the internet (link to plans) by Allen Lowe (N0IMW). But recently at a parade it struck me that a more versatile design might be a classical gentleman's walking-stick antenna. 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. Use the CB antenna as a support structure for a better antenna with some gain. 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. DBJ-UHF was developed from a grant from AC Daughty to develop a low cost medium gain MESH antenna for UHF. Loop Antenna for 10m 35 59. This post is for Ed Fong's "DBJ-1" and "DBJ-2" designs. If you desire the absolute maximum coverage area, this is the antenna to choose. Item Height 42 inches and Item Length 7 inches. Single or dual dipole mounted in the front of a 90º reflector, providing good directivity and a very high front-to-back ratio. coaxial is shorter. Stripping off the 10. Model # Band Stacked Element. I've had the ExpertPower 14. Post #1065. Half-Sloper Antenna for 160m 41 66. The CHA F-LOOP 2. There are mods for 160m and it might even work on 6m with some tuning. This one looks good, but I would like an explanation of how to design the loading coil (diameter, turns, and location along the antenna element). I have made a page showing some images and construction details of this antenna which can be seen here. 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. I was given two popular antennas to use for a decent amount of time. The SWR was 1. Inverted-V Beam Antenna for 30m 40 64. Today, I’m going to show you how you can easily build a homebrew 2 Meter ¼ Wave vertical antenna for under $10. Just ordered my handset - BaoFeng Dual-Band MHz FM Ham Two-Way Radio (Black) Came highly recommended !. 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'. I have almost completed one and have yet to add the feeder to complete the first attempt. Choose Tram for your next antenna installation project and stay connected with this Amateur Dual-Band Hi-Gain Hi-Power Magnet Antenna. It also has the coax cables to connect your radio to the antenna. It is an outstanding performer, especially when you get it up in the air. A Simple Homebrew Active Antenna. but on the UHF site ,have to test with my FT897. of the antenna changes with frequency. Dual Band Antenna V~UHF (High Gain) VHF Vertical Antenna; Portable Yagi for 2M and 70cm. This mobile whip antenna won't take long to build, works well and only requires one feed line for the two-band coverage. It is drawn this way just to provide a sufficient number of turns for tune-up. 4:1 at 144MHz rising to 1. Dipole Antenna Calculator. At this time the antenna is only constructed for 2m. Tarheel Antennas, Inc. 4GHz and cellular panel antennas:. this is the best dual band j-pole ever built 2m - 70cm direct connection beam dimenisions. · N1RWY's FT100 site allows for a mobile mount option and does include two antenna jacks for simultaneous HF and VHF - UHF antennas. 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. 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. You will need basic workbench/shop tools for cutting a drilling metals (e. It has gains 4 dBd on 2m and 6. See more ideas about Ham radio antenna, Ham radio and Ham. 2m/70cm Dual Band J-Pole by KK4ICE. Although not designed as a 440 70cm antenna, it works pretty good anyway. 73 Good DX! Thanks to Cyril's inspiration, I also came across some specs for a simple antenna build similar to the Arrow. line feeds during range testing. The SWR was 1. Then , TA TA. Say around 24 radials should work pretty well, the oak tree at 3. However, keep in mind that a high-gain antenna pattern has narrow elevation angle. TRAM Amateur Dual Band Base Antenna (1481) Choose Tram for your next antenna installation project with this Amateur Dual-Band Base Antenna! This 17-foot antenna has two frequency ranges: 144MHz to 148MHz and 430MHz to 450MHz. Next, plug the antenna into your computer using the extension. 2 antennas also means you would need a 2 way antenna switch. 25m, and 70cm 6-EL OWA Yagis on one rotator driven mast. T2FD The Forgotten Antenna; Home Brew dual band antenna A dual band design focused with better performance on UHF; The Texas BugCatcher and The Texas Twister Page The Serious HF Mobile Antenna" & "Complete HF Mobile Antenna System" Discone Antenna Design -- From QRZ; ANTENNAS by Rick Hiller W5RH; HF Vertical Antenna, accesories. There are mods for 160m and it might even work on 6m with some tuning. Substitutes a 5/8 wave-length section for the top quarter wave of the basic half wave antenna design. DB-2345 supplies 8 dBi gain on 2-meters and 6 dBi gain on 440-MHz. Testing the Homebrew Active Antenna. As I was setting up my amateur radio station, one requirement was for 2M and 70cm antennas in two locations. Multiband Hf S Beam Antennas Pg1n Ham Radio SiteHf Beam Antenna Homebrew New ImagesMultiband Hf S Beam Antennas Pg1n Ham Radio SiteHf Beam Antenna Homebrew New ImagesPg1n S Ham Radio …. Homebrew Corner. 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. 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. The RFMAX WPD136M6C-001 multi-band / wide band uhf vhf mobile antenna is a 20 inch tall, heavy-duty, IP66 rated vehicular roof mount antenna for police / public safety that operates throughout the VHF, UHF & P25 bands. About Home Brew VHF UHF dual band antenna The resource is currently listed in dxzone. As we all know, the antenna is the most important partof any transmitter system. Comet CA-2X4SRNMO Broadband VHF/UHF Dual Band Ham Radio Mobile Antenna. 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. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. 50 / 70 MHz dual band antenna comparison. The 40m antenna needs to be about 15cm (6") longer on each side to bring the resonance down to about 21. Disadvantages. ARROW ANTENNA OSJ-146/440 Dual Band 2 Meter / 440 MHz J-Pole Vertical Antenna. VHF/UHF Beam Antennas. The most common linear antenna used is an omnidireccional whip antenna, because directional antennas will drastically reduce the sole of the satellite. This is an easy antenna to build and the materials cost about $15-20. Introduction PE1ITR suggested me to make a switch that would allow both horizontal, vertical, Left Hand Circular Polarization (LHCP) and Right Hand Circular Polarization (RHCP) for the 2x6 elements DK7ZB cross yagi that I made. One of the antennas is a dual band, "model 2B2040LQ" , that covers 20 and 40 meters. It is a Boomless (spider quad, gem quad)design. But performance is down about 8-12db on a dipole on. Figure nº1: Scheme of a dual-band portable antenna. It can produce similar results to a commercial version and be made from scraps of coax. Choose Tram for your next antenna installation project and stay connected with this Amateur Dual-Band Hi-Gain Hi-Power Magnet Antenna. This is the result of my first attempt, a dual band 20 and 10 meter dipole fed from a common feedline. has been designing and building cubical quad antennas for amateur radio operators around the world. Allocca, WB2LUA, www. SWR adjustment with a plastic screw at gamma match feed. 5" total length. Before I built any home-brew mobile VHF antennas, the only VHF mobile antenna I had was an MFJ-1724B Magnet Mount Mobile antenna. I saw the plans for this on the internet (link to plans) by Allen Lowe (N0IMW). Manufactured, not assembled, we take pride in our craftsmanship that will provide you with a quality product that will last for years. Make sure the connector type of the antenna matches the connector on the police scanner (all scanners have either an SMA female or BNC female connector) or buy an adapter. Why Diamond misrepresents their antenna gain is anyone’s guess. Use the CB antenna as a support structure for a better antenna with some gain. When I change bands I preset them, connect the RF-1 and adjust the tuner knobs for the lowest SWR. DB-2345 supplies 8 dBi gain on 2-meters and 6 dBi gain on 440-MHz. com, 4/9/12 Introduction Having limited space led to the design of this multi-band antenna array, which has a foot print of. W3DZZ Multi-band Antenna 80-40-20-15-10m N. The AWD series of utra wideband discone antennas are lightweight, portable, quickly assembled and designed to MIL grade for HF, VHF and UHF. 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. The GP-9 is the highest gain, dualband fixed station antenna available from COMET. 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. Compact and effective 2m/70cm dual band antenna for satellite operation Antenna was designed for SO-50 satellite operation. This antenna is perfect for HAMS that need a quick reliable solution for local 2 meter communication. 2 = 33 feet. I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax. 8 GHz WLAN WiFi Antenna FM - TV Antenna Amplifiers Diplexers Ham Radio. Free sample available for test. 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. 2m/70cm portables are often seen clamped to a picnic table, mounted on a tripod, or hung from a tree. With dual band trap dipoles, it seems like it may be easier to arrange the antennas in favorable directions AND at good heights. Multi Band Fan Dipole Antenna. The Antenna Farm : High Gain Dual Band Antennas - VHF & UHF Mobile Radios Radio Accessories VHF & UHF Hand Held Radios Antennas Mobile Antenna Mounts SWR/Power Meters Adapters Coaxial Cable Two Way Accessories Antenna Accessories DC Power Supplies Coax Cable Accessories Amplifiers Connectors Aviation Radios Repeater Systems Towers & Accessories Scanners & Receivers Duplexers Diplexers. 8 MHz to 1296 MHz. Cell Phone Signal Booster Antenna for Verizon GSM 3G 4G LTE - Tri-band 700V/850/1900MHz Cellular Repeater Boost Band 2/5/13 Voice and Data for Home and Office Cover Up to 4,000Sq Ft Area. 73 Good DX! Thanks to Cyril's inspiration, I also came across some specs for a simple antenna build similar to the Arrow. 18 Customer Reviews. 4:1 at 144MHz rising to 1. 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. Their focus is on: wide bandwidth, designs that work equally well in all weather conditions, very low SWR and superior G/T, F/B and F/S ratios across the entire frequency band, excellent mechanical properties, and uncompromised durability. Stay away form dual band designs based on the SlimJim approach; The portable version of the DBJ-2 using 300 ohm line seems to function as designed. But if you’re the crafty type and enjoy a good challenge, you may want to homebrew your own antenna. Details about Shortwave, SWL, AM, OC, HAM, Broadcast band, End Fed longwire antenna, 100 foot Short Waves Ham Radio Oc The 100 TheSWL4-100 is a 100 foot (18 AWG gauges, Grey color), end-fed shortwave listener's antenna designed to perform well on the shortwave from. I built a 80 meter vertical, then put a matching network at the base for 40 meters. SHARMAN X-200 2M 70CM DUAL BAND. tram 1481 dual band base antenna 2 meter - 440 8. T he J pole is simply a half wave length vertical element with a folded quarter wave match stub. See the comments above about running a grounded wire underneath this antenna for better efficiency. Dual band antennas will often give segmentation check errors because two elements of different length are close to each. 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. 4 GHz Wifi Dual Band RP-SMA with quality guarantee from Renhotec, the top connectors manufacturer in china. 5, and Hi-Q-3 antennas. It has gains 4 dBd on 2m and 6. coaxial is shorter. That is why, Your Radio only has one Connector, the Antenna has two. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. For example: The 20-meter band covers 14. Item Height 42 inches and Item Length 7 inches. I have almost completed one and have yet to add the feeder to complete the first attempt. 1 at lowest point), for ALMOST the FULL BAND on 40 Meters, and under 1. It outlines how to build yagis for 144Mhz, 220Mhz, several different 440 band frequencies, 900 Mhz, and 1. I’ve constructed a 144/440 Dual band Open Stub J-Pole Antenna. Quad loop as a mono band antenna for 2m or 70cm, or a dual band version for both bands. My first homebrew prototype has different measurement on VHF elements Due to the material used finally did it and send the sample to. a bit for use on the 10-meter amateur band. this is the best dual band j-pole ever built 2m - 70cm direct connection beam dimenisions. It's easy to install on glass windows or other non-conductive surfaces. What can I do? A: Try adding a balun to the coax. TRAM 1185 Amateur Dual-Band Magnet Antenna. Since I like making things, a homebrew antenna was in order. Tri-band Delta Loop Antenna for 80m - 40m - 30m 36 60. Copper Cactus Dual-Band Super J -Pole Antenna Project 2 meter 70 Cm Home brew antenna All the materials except the S0239 fitting can be found at any good hardware store, and the whole antenna can be made in less than an hour. 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 easiest dual band (144/440 MHz) antenna to build from materials available at ANY hardware or building supply store is the J-Pole antenna. 7:1 at 146 MHz, indicating that the antenna is a bit long. DBJ-UHF was developed from a grant from AC Daughty to develop a low cost medium gain MESH antenna for UHF. I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax. Dipole Antenna Length Calculator. Small,Portable,Lightweight and VERY VERY effective but RG-174 is a lossy coax by nature and on my basic model antenna at 5 feet of coax there is really no loss to speak of but just 0.
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