Plenty of 2 Antennas to Choose From. Fast Shipping and Orders $35+ Ship Free. Great Prices on 2 Antennas. Shop Now and Save 1-16 of 498 results for 2 meter 440 antenna Price and other details may vary based on size and color. Harvest Wireless X50 V/UHF 2M/440 Dual Band Base Antenna. 4.3 out of 5 stars 6. $79.00 $ 79. 00. FREE Shipping. Only 1 left in stock - order soon. More Buying Choices $74.00 (2 new offers This dual-band model covers the two most popular VHF and UHF amateur bands, 2 meters and 70 centimeters. A typical SWR under 2:1 across the frequency ranges 144-148 MHz and 420-450MHz, depending only upon the vehicle mount or base mount position. This antenna handles up to 85W on the 2M band and 50W on 70 cm
Great deals on 2 Meter 440 Antenna. Be prepared and able to communicate in case of emergency with the largest selection at eBay.com. Fast & Free shipping on many items Elk Antennas 2M/440L5 Dual-Band Antenna. $ 129.95 - $ 162.45. Whether you are operating portable or permanent, you will find the convenience of a dual-band Log Periodic antenna to be an incredibly convenient and powerful tool in your ham operations. Having both 2 Meter and 70 cm Bands in a compact, two foot long package, without having to. This is the best glass mount dual band 144/440 MHz antenna in ham radio!Its easy to install on glass windows or other non-conductive surfaces.A small 6 inch counterpoise mounted inside your vehicle lowers SWR and makes tuning easy. Tuning for minimum SWR is conveniently done inside your vehicle lowers SWR and makes tu What is the BEST 2 meter/440 antenna? Looking for high DBI, low swr, etc..... Price is not an issue. Note: I currently run a tram 1480 dual band antenna. I am pretty happy with it. I just want to hear other peoples opinion on other antennas SKU: DB-218SAT Hy-Gain. Base Antenna Dropshipped from Hy-Gain HY-GAIN UHF/VHF 2 Meter/440 MHz Oscar Link Antenna System. Frequency: 144-1..
Optimized Compact High Performance 2 Meter + 440 Bands. Only 7.5 long. Reliable leaf spring style NMO connector on antenna for standard center-stud style NMO mounts. Antenna Type: Unique Electric/Magnetic Field Diversity Science & Technology Patented Design. Product Narrative: Small Rugged Antenna with High Performance • 2 meter slot antennas need a minimum dish size of 28 inches • 440 mhzslot antennas need a minimum dish size of 16 inches • The slot antennas exhibit very good bandwidth i.e. the 2 meterantennais10mhzwideat2:1SWRpointsmeter antenna is 10mhz wide at 2:1 SWR points
The 2 - 440 Collinear vertical in this project is simple to build and expand, semi rigid, self supporting, water tight, electrically sound, and a professional appearance when completed. Getting Started: First look at my drawing below, and decide how long an antenna you want to have up, approximately In Stock. In Stock. Tram 1189 Glass Mount Antenna w/PL259 (150-158MHz), 30.20in. x 4.75in. x 1.00in. 4.5 out of 5 stars. 23. $25.08. Only 1 left in stock - order soon. Only 1 left in stock - order s. Tram Browning 1191 Amateur Dual Band Glass Mount Antenna UHF 440-450 MHz and VHF 144-148 MHz PL-259 for Icom HYT Vertex Mobiles two way radio. HYS Yagi Antenna Dual Band VHF/UHF 144/430Mhz 2Meter 70CM 100W High Gain 9.5/11.5dBi Outdoor Antenna for Baofeng Motorola Yaesu Kenwood Transceiver 2-Way Radio 3.7 out of 5 stars 9 $98.99 $ 98 . 9 • 5 Stanley L-bracket (Despot $2.59) • UHF to 3/8 antenna mount (Texas Towers $4.89) - Optional Materials • ¾ EMT conduit, 6 or 8 hose clamps, qty 3, Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 10 Required Tools - Electric drill or drill press. The NA4IT CHEAP Dual Band 2/440Mhz Ground Plane Antenna. by ScottDuckworth. Editors Note - Here is a very easy to build dual band (2 meter/440) vertical ground plane antenna that may end up as your primary antenna for dual band operation or for emergency use
A look inside a 2 meter 440 jet stream dual band antenna. The antenna uses phase shifters to treat the 440 and 2 meter elements in a collinear manner. It app.. Comet GP-15 (6M, 2M, & 440 Band Antenna) Average price is $170.00 to $200.00. The Comet GP-15 is a pretty cool antenna that really delivers. The GP-15 covers 6 meters, 2 meters, and the 440 band. It uses a very simple design of copper and brass wire sections connected together with a few capacitor traps and couplers, running up through the. Product Description. MFJ-923 VHF/UHF Dual Band Antenna Tuner covers the complete 144 MHz and 440 MHz frequency ranges. Built-in Cross-Needle SWR/Wattmeter measures SWR, forward and reflected power in two ranges: 300 or 30 Watts. Meter is usable for both bands 144 and 440 MHz. Handles 200 Watts
Phillip Johnson KI4EYM. PayPal Shopping Cart. $59.00. OSJ - Model OSJ 146/440 Dual Band J-Pole. $69.00. OSJ - Model OSJ 146/440 Dual Band J-Pole with Extra Labor Charge for Two Piece Element. (Will also fit in the Antenna Bag if ALL the elements are removed from the bracket.) $59.00. OSJ - Business Band, Marine Band & MURS 150-162 MHz tram browning 1180 5/8 wave dual band 2 meter/440 mobile antenna and black mag mount antenna specifications frequency range: 144-148 mhz & 430-450 mhz 3 db gain vhf and 6 db gain uhf overall height 37 1/2 new updated loading coil with a gold plunger spring loaded type contact pin for superior corrosion proof contact intergrated o-ring weather seal 5 inch black nmo magnet mount specification. 6 Meter / 2 Meter / 440 Tri-Band Sleeved Collinear Antenna Project by W7LPN Rick Frazier. Here is a Tri-Band 6/2/440 Collinear antenna that if built properly, using the materials suggested by the author, should give you years of service. It is a heavy duty fiberglass radome style collinear multiband vertical capable of operating on your choice.
Dual Band 2 Meter / 440 MHz J-Pole Vertical Antenna. HRO Discount Price: $58.95*. *After Coupons & Promotions. Tweet. ARROW ANTENNA OSJ-146/440. Wish List. Please to add to your wish list! Login. Register For An Account 2 meter/440 mhz copper j-pole antenna. optimized for 2 meters, and covers 440 too. built per directions it covers entire 2m band ! this antenna is built almost entirely of hardware store items with the exception of the feedpoint connector and works as well or better than most commercial antennas - and it cost less too ! mount it to a mast by.
WBØTGE's Mighty Woof 2m/440 Fan Dipole. One of the antennas Bob discussed was the HF wire fan dipole. This is a multi-band antenna. which gives the amateur the capability of utilizing several radio bands with only one feed line. The fan dipole is usually constructed of multiple sections of wire tuned for each band required The best antenna is the one you just made a contact with. Seriously, if you are not on a budget, Diamond and Comet make excellent 2m/440 antennas in several gain configurations. You could build your own. Arrow antenna makes a 2m/440 j-pole, which at $49.95 is a bargain and an excellent antenna Diamond Antenna X200A Dual-Band Base Antennas. Diamond Antenna X200A Dual-Band Base Antennas provide excellent performance on the 2-Meter and 70-Ce.. NOTE: Comparative testing of this antenna against one without the choke showed that the choke is NOT needed.Homemade vertical dipole for HAM 2 meter and 7.. The MFJ-1724B is the world's best selling dual band 2 Meter/440 MHz magnet mount mobile antenna! Its perfect for your dual band mobile or HT. Free BNC handheld adapter. MFJ's powerful 3 1/2 inch magnet base holds you antenna firmly -- even at highway speeds. The base has a scratch resistant rubber guard to protect your car. Manufacturer's Website
The Remtronix REM-VU100B is a very compact flexible antenna providing extremely good performance in the 2 meter and 440 MHz amateur bands. It has +6dB minimum gain over a standard antenna. This 15 inch tall antenna terminates to a male BNC connector. The new Remtronix REM-VU100S (shown right) is the same, but terminates to an SMA connector The revolutionary COMPACtenna CB/2M/440 uses a patented design which includes magnetic-field-enhancement. This allows the extremely short antenna to perform amazingly well for its height. Coverage includes all CB channels plus it can used on the 2 meter and 440 MHz amateur bands! Power capacity is 100 Watts CB, 85 Watts 2m and 50 Watts 440 DualBand 2M/440MHz base antenna Small profile, good gain, excellent constructionour best selling dual-band base antenna. Gain: 2M: 4.5dBi 440MHz: 7.2dBi VSWR: 1.5:1 or less Max Power: 200 watts SSB/100W FM Length: 5′ 11″ Weight: 2 lbs. 12 oz. Mounting Mast Dia: 1.25 - 2.50″ Connector: SO-239 Construction: Heavy-duty fiberglass Mount pipe acts as shroud to protect the antenna/coax.
DIY 5$ Portable VHF Yagi Antenna for the 2 Meter Band (144-146 MHz) by F4HWK: In this publication i explain how to build a very light weight, cheap, easy to build and deployable in 30 seconds portable VHF antenna for the 2 meter band. Here i present all steps to build this antenna. Measurement results for the S11 (or SWR) ar The Antenna Farm : 2 Meter Yagi 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 & Triplexers. =====More information on my website at http://www.fuzzthepiguy.tech=====Here are the measurem.. The entire 2m band is typically under 1.5 to 1 with the best point is under 1.1, sometimes much less. Although not designed as a 440 70cm antenna, it works pretty good anyway. 440 band is generally around 2.5/1 at the lowest edge and around 1.6/1 in the middle and up to 2.5/1 at the upper edge. Crossbanding works most excellent 20 Inch 20 Meter, 2 Meter & 440 HAM Radio Antenna. HRO Discount Price: $99.95 * Buy It *After Coupons & Promotions. Tweet. COMPACtenna COMPACtenna 20M/2M/440. Current Stock Status At These Ham Radio Outlet Locations. Anaheim, CA. Atlanta, GA. Denver, CO. New Castle, DE. Milwaukee, WI. Salem, NH.
Because, the 45 foot tower with the smaller antenna will have the primary radiation lobe higher above the ground than the primary radiation lobe of the bigger antenna at the lower height. I recently built a one 1/4 wave element over eight 1/2 wave elements collinear vertical for the 1.25M band out of 8 gauge copper wire (about 19 feet tall) Build your own 2m/70cm 3 Elements VHF by 5 Elements UHF Yagi antenna with excellent gain for both VHF and UHF operation. This antenna is designed for amateur band frequency for both VHF (2m) and UHF (70cm). The antenna has good reflection coefficient and VSWR ratio @ 1.2:1 at center frequency and 1.7:1 at band Continue reading Build the 3 x 5 Elements 2m/70cm Dualband Yag This antenna was designed for center frequency of 146 MHz and 440 MHz. On 2 meters, this antenna will give you roughly 6dB gain over a full size dipole (6 dBd) , and probably 12 dB over the stubby rubber duckie antenna that probably accompanied your handheld transceiver. This is because electrically very-short-for-wavelength. COMPACtenna. 6m/2m/440 6m, 2m and 440 MHz Antenna. 10m/2m/440 10m, 2m and 440 MHz Antenna. 20m/2m/440 20m, 2m and 440 MHz Antenna. HamR-7 40m, 20, 10m, 6m, 2m, 220 and 440 MHz Antenna. Cushcraft. A270 6S Beam 2m and 440 MHz. A430 11S Beam 440 MHz. AR450 Vertical 440 MHz Take the 1 1/2 adapters and glue them to your PVC pipe; one on the top and one on the bottom (the bottom adapter can be used to mount the antenna to a flange for stability). Next drill a 5/8 inch hole in the top of your 1 1/2 cap and then attach it to the top adapter. Slide the coax through the PVC pipe and connect to your SO-239 connector
2 Meter 440 Vertical Dipole Antenna Project by W7LPN More. alroxburgh. Ham Radio --- AJ4RF. Radios. Radio Amateur. Hf Radio. Dipole Antenna. Ham Radio Antenna. Good Communication. Electronics Projects. Consumer Electronics. Emergency Preparedness. Portable Yagi for 2M and 70cm In theory antennas should work on odd harmonics. Much of the 420 - 450 band is a third harmonic of 144 - 148. In theory, 10M antennas should work on 2M. In practice, these theories tend to make the finals run hot. A 2M antenna used on 440 would tend to have a very narrow useable SWR range. A 10M on 2M - you go ahead
Shop for 2 Meter Antennas here. 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. I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax. The goal here is to put up a cheap, easy, and quick 2-meter antenna that is simple and unobtrusive, but works. M2 Antenna Systems Inc, Announces Release of L & C Band Circular Dish Feed (FGFD-2-LC-CC-1) M2 Antenna Systems, Inc with headquarters and manufacturing facilities located ARRL Product Review of the M2 6-Meter HO Loop Antennas. Reviewed by Bob Allison, WB1GCMAssistant Laboratory Managerwb1gcm@arrl.org The Simple, cheap DIY radio scanner antenna (receive only, for police scanners) Simple, cheap DIY radio scanner antenna (receive only, for police scanners) Pinterest. Today. Explore. When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures
Looking For 2 Meter 440 Antenna? We Have Almost Everything On eBay. Fast and Free Shipping On Many Items You Love On eBay Features. Tuned to 2 Meter and 440 Ham Bands: Each antenna is tuned to focus on the 144-148 MHz VHF and 430-450 MHz UHF amateur radio bands, with match for transmit at approximately the center of those ranges.Other bands can typically still be received. Excellent Performance: 5/8 wave over 5/8 wave stacked elements gives 5.5 dBd of gain on UHF and a combined 1/2 wave 2.4 dBd gain on VHF Product Description. TRAM-BROWNING 1181 DUAL BAND 1/4 WAVE NMO MOUNT ANTENNA. COVERS 140 - 170 MHz & 430 - 470 MHz. UNITY GAIN ON 2 METERS. 2.5 dB GAIN ON 440 MHz. 17 OVER ALL HEIGTH. BRASS BASE WITH A GOLD PLUNGER SPRING LOADED TYPE CONTACT PIN FOR SUPERIOR CORROSION PROOF CONTACT. BLACK KOTE FINISH
Select from single, Dual or tri-band antennas VHF Tri-Bander Pulsar VHF Tri-Bander The perfect base/repeater antenna for VHF work. Covers 2 Meters, 6 Meters and 440 MHz. You get 2 dB gain on 6 Meters, 6 dB gain on 2 Meters and 8 dB gain on 440 MHz. Only 8.2 feet, shipped in two sections. So-239 Connector, handles 200 Watts. Video MFJ-1717PL is a foldover dual band flexi-duck antenna with a quality PL-259 connector. It gives you a hearty 2.15 dBi gain on 440 MHz and is a full size 1/4 Wave on 2 Meters. It's factory tuned for minimum SWR. High-Q, low loss construction. 16.5 inches. Hard plastic protective safety tip Mounted to the horizontal cross piece with 2 U clamps, long legged muffler type clamps. Top of antenna is about one inch below the ridge beam. Bottom of antenna is approx 25 feet above ground level. Using 400 flex type cable (ABR brand from HRO). Just try to keep it away from any metal, vents wiring etc 440 from a 2m Antenna? Many makers of J-poles for 2 meters claim they can also be used at 70 cm. It may not be intuitive at first, but the answer, at least from an antenna pattern standpoint, seems to offer some hope. On a related note the standard 19 inch quarter wave mobile whip exhibits good Return Loss near the UHF FM segment when I.
The MFJ-1724B is the world's best selling dual band 2 Meter/440 MHz magnet mount mobile antenna! It's perfect for your dual band mobile or HT. Free BNC handheld adapter. MFJ's powerful 3 1/2 inch magnet base holds you antenna firmly -- even at highway speeds. The base has a scratch resistant rubber guard to protect your car From: main@Ham-Antennas.groups.io [mailto:main@Ham-Antennas.groups.io] On Behalf Of Allen Sent: Monday, April 5, 2021 5:05 PM To: main@Ham-Antennas.groups.io Subject: [Ham-Antennas] 2 meter 440 dual antenna Crushcraft #1 Ok I just acquired an antenna 2 meter 440 A270-10S Crushcraft. I noticed in the manual and also when I took this antenna down I noticed that the main coax lead wire went into.
2 Meter / 440 Thru-The-Glass Antenna . Not in stock . Amateur Mobile Antennas The Opek VUG-270 is dual band Thru-The-Glass antenna for 2 meters and 70 cm. It features a field-tunable 26 inch stainless steel whip with black finish. It also comes with 14 feet of RG58 coax terminating to a PL259. Gain is 2.6/4.0 dB. VSWR is less than 1.5:1 through. tram browning 1180 5/8 wave dual band 2 meter/440 mobile antenna and 3 1/2 black mag mount antenna specifications frequency range: 144-148 mhz & 430-450 mhz 3 db gain vhf 6 db gain uhf overall height 37 1/2 new updated loading coil with a gold plunger spring loaded type contact pin for superior corrosion proof contact intergrated o-ring weather seal browning model br-317 3 1/2. Description. The 2 meter J-Pole works great on the 70cm band as a dual band antenna, but sometimes you may want a 440MHz dedicated antenna. The UHF J-Pole antenna is designed and tuned specifically for the 70cm amateur radio band. Many of the hams that have purchased this antenna have put it to use for in situations such as: UHF voice operations
Jan 31, 2015 - 2 Meter 440 Vertical Dipole Antenna Project by W7LPN. Jan 31, 2015 - 2 Meter 440 Vertical Dipole Antenna Project by W7LPN. Pinterest. Today. Explore. When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures The articles present designs and construction techniques for inexpensive and easy to build antennas that will make perfect first projects. All articles are in Adobe PDF format. CheapYagi for 70cm - This article is intended to enable non-satellite hams to painlessly acquire the 440 MHz downlink antenna needed to actually hear and work a satellite Dualband Mobile Antenna 2m/70cm VHF/UHF Ham Radio, 137-149, 437-480 Mhz, Magnet Base PL-259 Connector, 10 Ft RG58 Cable. NETGEAR Wi-Fi Range Extender EX3700 - Coverage Up to 1000 Sq Ft and 15 Devices with AC750 Dual Band Wireless Signal Booster & Repeater (Up to 750Mbps Speed), and Compact Wall Plug Design Need a 2-meter beam antenna, but you're short on cash? You can build this antenna for the cost of a fast-food meal! hen I became active on 2-meter FM, I soon discovered that I needed a beam antenna to hit some of the local repeaters. Local in Crosby, North Dakota, means 50 to 60 miles as the crow flies! I knew there were plenty of VHF antenna 7 Comments The Art of Waiting Said,. June 9, 2009 @ 11:42 am [] 2m / 440 Copper Pipe Super J-Pole [] On the Nature of Interacting Antennas Said,. May 2, 2010 @ 9:47 pm [] while back I built a 2m Copper Super-J-Pole antenna which I attached to my chimney and use on a daily basis
HF CL series 6M & HF Monoband Antennas. HV7A 10M/6M/2M/440/+ Antenna. MR73SA 2M/440 HT Antenna. MR77 & MR77SMA 2M/440 Antenna. NR72BNMO 2M/440 Antenna. NR73BNMO 2M/440 Antenna. NR770HA, NR770HB & NR770HNMO 2M/440 Antennas. NR124N, NR124NMO 1.2 GHz Antenna tram browning 1180 5/8 wave dual band 2 meter/440 mobile antenna and 3 1/2 black mag mount antenna specifications frequency range: 144-148 mhz & 430-450 mhz 3 db gain vhf 6 db gain uhf overall height 37 1/2 new updated loading coil with a gold plunger spring loaded type contact pin for superior corrosion proof contact intergrated o-ring weather seal browning model br-316 3 1/2 inch chrome. 440-5. Five Element Portable Hand Held Yagi - for 70 cm. 440-7. Seven Element Portable Hand Held Yagi - for 70 cm (37 1/2 Boom) 146/437-10. LEO Satellite Antenna - 3 Elements for 2 Meters crossed with 7 Elements for 70 cm. 146/437-14. Alaskan Arrow LEO Satellite Antenna - 4 Elements for 2 Meters crossed with 10 Elements for 70 cm. 121.5-3 Description. You get an improved 300 Watt 1/4 wave ground plane for 2 Meters thatll bring up repeaters as well also r better than any 1/4 wave ground plane -- even if they cost twice as much. The improved MFJ 1/4 wave ground plane minimizes feedline radiation for more useful radiated power, reduced TVI and noise pickup by the coax shield 9,051. Sep 14, 2020. #25. Well I've had my new REMTRONIX VHF/UHF 2m/70cm antenna for a couple weeks now. So far it's about what I expected. If I had to guess it might be performing a little better on VHF than the Diamond RH77CA. It should be noted I'm using it for the VHF airband, not VHF amateur radio
2M Band Vertical Base / Repeater AntennaSpecial Features: Heavy-duty aluminum antenna sections Encapsulated matching network for weather protection Stainless steel mounting hardware and radials Factory tuned, no adjustments requiredSpecifications Other than that, this antenna acts just like the classic center-fed dipole. Again, because it is a half-wave antenna, it does not need a ground plane. Fully extended, the antenna is 42 inches long but it collapses down for storage (Figure 2). The MFJ-1714 costs less than $20 and comes with a BNC connector I bought this antenna right after I bought my VX7R. Over the last few weeks I got tired of the size and weight of the antenna so I tried to replace it with the Diamond SRH77CA Dual Band (2 m /70 CM) HT Antenna. Let me give me your a brief overview of how the AL-800 performed 27 pf at 2 meters is ~40 ohms reactance so it's a sane value for some sort of match, at least. e: yeah if you take a 49cm whip against perfect ground and lengthen it to about 53, 54 cm, it comes up to 45-50 ohms resistance +j40 ohms. a 27pf cap would tune that right out and make it dead flat on 2m. up on 70cm the cap is only 13 ohms of. Bill4 mentioned amount of antenna movement in the wind. Yes they do! It has made me winch more then once. I check it about every two years and no cracks noted. Not a fan of the little phillips set screws but they are tight when inspected. If you happen to listen outside of 2 meter/440, you should be impressed with the usable frequency range
There are times when you may need more gain than the standard J-Pole antenna. 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. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS. Arrow Antennas Portable Satellite Yagi Jpole 2m 6m. We are open for business as usual with only small delays. Everyone stay safe. Arrow Antenna is now offering FREE SHIPPING on orders over $100 and $5 Flat Rate Shipping for orders up to $100 to the lower 48, Flat Rate Shipping of $15 for all orders to Alaska and Hawaii and $30 for US. 1. To work efficiently the short mobile antenna must be resonant. 2. At the resonant frequency F0 the antenna generates the maximum voltage across the antenna and the maximum current through it, with the correct phase relationship. Efficiency drops rapidly as you move away from the resonant frequency. 3 Here are the plans to build a 2 meter J-pole antenna: The above dimensions for the J-pole are in inches. Measurements on overall length, and stub length are from the centerline of the separation pipe (horizontal) to the top of the antenna. The Connect at measurement is 2 1/4 inches from the top of the horizontal member to the point of connection
The antenna site elevation is approximately 13 m AMSL and is about 200 m from the shore of Cook Inlet. The antenna uses a pipe mount as shown in the pictures. The LPA is a directional antenna with an a gain of approximately 7 to 10 dBi and 3 dB beamwidth of approximately 60 degrees, both determined from antenna models provided by the manufacturer 2/70cm j portable antenna plus a novel base support by n6jsx. cheap method for a dual bander put your junk antenna parts to use. kk5id. 2 meter/440 j using cb whipn6jsx. 2 meter ultra cheap antenna. 2 meter sling shot re-visited. design a j pole for any band. easy 2 meter ground plane + 2 meter 5/4 wave antenna. the ll cool
Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. It is a 1/4 wave on 2 meters providing 2.15 dBi gain and a 1/2 wave on 440 providing 2.15 dB gain. This antenna can handle up to 100 watts. VSWR is less than 1.5:1 The 2-meter roll-up J-pole is lightweight (approx. 3 ounces), compact and effective! The antenna can be set up quickly and easily by hanging out a window, attach to a ceiling, or toss a lead sinker over a tree branch with kite string and hoist it up. Slide it inside PVC pipe for rigid vertical installation (retuning required) I debated between and finally chose the 1/4 wave antenna instead of the higher-gain MFJ-1728 for two reasons. 1, I didn't want the taller antenna hitting the garage door, and 2, the 1/4 wave covers 70cm instead of 6 meters. I have a dual-band 2 meter/440 HT, and I'm unlikely to ever need 6 meters
Assembled 2 metre cubical quad antenna. The boom for the antenna is made out of two lengths of 25 x 25 mm wood. If necessary the spacing of the parasitic elements can be adjusted with these two lengths of wood acting as a clamp. However once all the adjustments have been made then all the elements should be firmly screwed and glued to the boom There are 2 ways you can co-phase antennas. You can buy a power divider or you can do the T connector method as I did w/my own stacked 5's. Co-phased system using a T connector: If you choose to do the T connector method, you will have get a T connector where all 3 ends are female. You will also have to make a co. ARRL, R. Deam Straw. The ARRL Antenna Book: The Ultimate Reference for Amateur Radio Antennas, Transmission Lines And Propagation. American Radio Relay Leauge; 21st edition (May 2007) Peter Knott. Wire Antenna Modelling with NEC-2. Antenna Engineer 8/12/2009. PDF (Sept 2011) Daniel C Lester (KE9SE) This page documents a build of a 2-element 1/2 wave collinear J-Pole performed by Harry, KC9EOT, and myself, KB8OJH. We fabricated two identical J-Poles using the dimensions in this document, and both of them performed quite well, with a resonant frequency toward the lower end of the 2-meter Amateur band and a VSWR of 1.5:1 or better over the entire band This antenna is a 1/2 wave vertical dipole made out of RG-58/U coax. The beauty of this design is that it is cheap, simple, and easy to make with readily available materials. The radiator should be 39 inches long for 2 meter operation. What I use for the radiator, is the center conductor of the RG-58/U coax. I start out with a 12 foot piece of.
