J-Poles: (OSJ = Open Stub J-Pole) Model # Description: OSJ 146/440. Dual Band - 2 Meters & 70 cm - Solid Aluminum - End Fed (SO239 Connector Only) OSJ 220. 220 MHz. End Fed (SO239 Connector Only) OSJ - VHF. Wide Band Width (150 - 162 MHz.) Solid Aluminum - End Fed (SO239 Connector Only 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.) OSJ - Business Band, Marine Band & MURS 150-162 MHz: OSJ - Dual Band 155/460 MHz - Search & Rescue Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 16 An Even Better J-Pole - Electrically • The gain is about 7.4 dBi. This value is about 2.3-2.4 dB higher than the average gain of a single-radiator J-pole. Indeed, although many folks like to bandy the gain advantage of a collinea Depending on the 2 meter and 70cm frequencies you choose for tuning your antenna, you might have to compromise a little. I got lucky, because I was using 147.060 MHz and 442.100 MHz, which just happened to both yield a length of 19.08 inches for the longer of the two 3/8″ rod elements Figure 2 — Elevation plane pattern comparing 2 meter J-pole on fundamental and on third harmonic frequency (70 cm), with the antenna mounted 8 feet above ground. Most of the energy at the third harmonic is launched at 44º. Figure 3 — The original DBJ-1 dual-band J-pole
TWAYRADIO Yagi Ham Radio Antenna,Dual Band 2m 70cm VHF UHF Yagi,High Gain 8 Elements GMRS Vertical Base Antenna for Mobile Radio,Repeater System,HT Scanner,Satellite Work. 5.0 out of 5 stars 4. $98.50 $ 98. 50. 6% coupon applied at checkout Save 6% with coupon. Get it as soon as Tue, May 4 This is my revised BASE 2m/70cm Copper-Pipe J, a how-to DIY with an optional method to make a PORTABLE dual-band J for hotel travelers, restricted apartment dwellers, or for limited balcony/patio use. See my previous J Pole Antenna Stand project here Quest for Dual Band Capability While most of the repeaters in my area are 2M, the ICOM 208H is a dual band (2M & 70cm) radio and it seemed a shame to waste the 440MHz capability. This led to a search for a dual band Slim Jim Design But instead of simply trying to load a two-meter jpole on 70 centimeters and proclaiming it to be a dual bander , the B-Square dual-band j pole is a true two-band antenna. First, it is a very effective broadband two-meter j-pole, ready to work beautifully anywhere in the band and beyond I am a new ham. I have a new dual band 2M/70cm J-pole that I have just installed on my roof. It is fed with 45 ft of LMR400. My SWR readings taken with a antenna analyzer are (Mhz/SWR) 145/1.5, 148/1.2, 442/1.8, 450/2.9
A Slim Jim for 2m (145MHz) will be 1.5 metres long, and 70cm (433MHz) will be 0.5 metres. Alternatively, for permanent installations, the copper tube or aluminium J-pole is a good choice. I have had good success with both, but regularly use the balanced feeder Slim Jim mounted on a 9m fibreglass pole, as can be seen in the photo at the bottom. DBJ-1 (commercial) dual band base antenna - (152-157 MHz and 460-470 MHz). Maximum power input 75 watts. - $40 (also available in 250 watt version for $60 - please email me for this special order item.) DBJ-2 (ham) dual band roll up antenna kit - (144-148 MHz and 440-450 MHz) Includes adapters for BNC, SMA and SMA - female. Also includes a 6 ft. I am going to build a dual band j-pole antenna. I have two different plans that I found on the internet. Both call for 1/2 EMT conduit. I plan on using 3/4 copper pipe. Both plans call for 3/8 stainless threaded rod which I will be using. I am not sure if it will make any difference using 3/4.. This is a short video with modified the plans provided by http://ve3elb.ham-radio.ch/2m-70cm%20antennas.html for use with copper pipe and a Di-electric insul.. Can the popular DBJ-1 dual band base antenna be adapted to also work at 220 MHz with minimal changes and no degradation of performance at 2 meters and 70cm? Review of the Literature J. L. Harris - Stack tri band J-pole QST 1980 Suffers the same problem of 2 mt section radiating at UHF. Comet CX-333 $162 uses 3 radials (uses traps
This is a manufactured J-pole by B Squared engineering. I selected it because I needed a stealth 2M/70cm antenna, and this one filled the bill and had good reviews. Tomorrow I will remove it from the roof and test it on my chain link fence post J-Pole Antenna: 2 M / 70cm HAM. One of the most-talked-about antennas is now better than ever... a true two-band antenna! Just when you thought that all the variations of the j-pole have already been explored, here comes the latest B-Square dual-band version that takes this popular but often-misunderstood antenna to new heights. Our version of the antenna is based on our previous very. The original Ed Fong Dual Band VHF/UHF 70cm/2m J-Pole PVC Pipe Antenna : Eye-On-StuffPlease consider donating to my channel so I can make more videos for you.. 2m / 70cm Dual Band Dipole Antenna $48.95+ 2m / 440 Dual Band J-Pole Antenna Kit KM4IEsHamRadioWorks $ 20.00 FREE shipping Add to Favorites HC49/U QRP Crystals for Ham Radio, installed in used FT-243 Holders (made to order, tested) KW7T $ 24.45 FREE.
The Signal Staff is a dual band 2 meter / 70 cm Open-Stub J-pole from S&K Antenna Systems!. This is a new antenna for us here at Signal Stuff made by S&K Antenna Systems who are friends of ours and have assisted in many aspects of Signal Stick manufacturing J-Pole Antenna: 2 M / 70cm HAM One of the most-talked-about antennas is now better than ever... a true two-band antenna! Just when you thought that all the variations of the j-pole have already been explored, here comes the latest B-Square dual-band version that takes this popular but often-misunderstood antenna to new heights. Our version of the antenna is based on our previous very. For 70cm, the center and leftmost element form the J-pole, and the rightmost element, being a little over 2WL long, isn't resonant and doesn't have much of an effect. It's not super important whether a J-pole is fed at the long or the short element; since the leftmost (medium length) one is the one that both bands have in common, that's the. The Northern Virginia team of Ham Radio operators and companion hikers manned Hawksbill Mountain for the 2011 Appalachian Trail Golden Packet event. Gear included a Kenwood D710 with Green Light Lab GPS, 2m Collinear J-Pole and a 70cm collinear J-Pole
RW-GP1.7 Dual Band144/444 Mhz 2 meter 70CM Ham Radio Fiberglass Base Antenna. $90.00. Premium KB9VBR J-Pole Base Antenna 2 meter dual band amateur ham radio scanner. $39.97 + shipping. US 2x Baofeng UV-5R Dual-Band 2m/70cm VHF UHF FM Transceiver Ham Two-way Radio. $44.99. Free shipping 2m/70cm dual band j-pole antenna project. Thread but was only hearing one side. I took the j-pole outside and hooked the handheld up to it and heard both sides then. And the antenna was only 8 feet up propped on my fence. worry if the swr is a bit high and don't give too much merit to the alarmist because dollar for dollar you have a. 3. 70cm Dual-Band Version. Being very happy with the new antenna and having 2m of PVC pipe left over, the next day I decided to build another one, this time with the foil sheath added so it could be used on 70cm as well. It only took it only took around 90 minutes now that I knew what I was doing, including mounting it on the roof
. What can I do? A: Try adding a balun to the coax. A balun is necessary because a J-pole antenna uses a balanced feed (th DIY Dual-band J-Pole Antenna I recently met with some friends from a local prepper group and learned how to build a simple, inexpensive dual band (70cm and 2m) J-pole antenna. This antenna design is pretty well known (the ARRL website has several articles on it, including this one ) and quite easy to make Stainless Steel 2M-70Cm J-Pole Time Owned: 3 to 6 months. Nice one piece, corrosion resistant, silver brazed, dual band J-pole. It is very stealthy and has a very low wind load. I have mine mounted to a PVC vent pipe using radiator clamps, up around 18 ft. near peak of roof. Get out 50-70 miles with Yaesu FT-7800R with 40/50 watts. Purchased on. Here is an inexpensive J-pole antenna that is easy to construct. In about an hours time, and about $10 worth of materials, you can have a great performing omnidirectional j-pole antenna.This antenna is based on the same ideas as my 2 Meter J-Pole construction plans.The j-pole antenna is basically an end fed half wave dipole that uses a 1/4 wave shorted matching stub as an impedance transformer KB9HGI Cactus Dual band J-pole Dual band Cactus j-pole This is a very easy and simple 2 meter/70cm vertical antenna. I built one of these myself and seems to work quit well. Just follow the instuctions like on the diagram and swr's should be good. These are also cheap to make and was passed on to me from another ham and i thought I would pas
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 Buy HYS Dual Band Yagi Antenna High Gain Outdoor Base Station Antenna 100W 9.5/11.5dBi VHF UHF 2M/70CM for Kenwood Motorola AnyTone Wouxun 144/430Mhz Mobile Transceivers at Amazon UK 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. ARROW ANTENNA OSJ-146/440 Dual Band 2 Meter / 440 MHz J-Pole Vertical Antenna. HRO Discount Price: $58.95 * Buy It *After Coupons & Promotions Tram 1477-B Pre-Tuned 144mhz-148mhz Vhf/430mhz-460mhz Uhf Amateur Dual-Band Base Antenna (Black Fiberglass), 44.00in
Dualband J-Pole antenna tuned for 2M & 70CM HAM bands (Can be used onPMR446 and as a general VHF/UHF Scanner receiver antenna). This does NOT require a ground plane. Single SO-239 feed for both 2M & 70CM bands This a kit to build a Dual Band J-Pole antenna for the amateur 2 meter and 440 MHz bands. You can tune this antenna for the lowest SWR in the portion of the band that you wish to use. The kit includes ladder line, coax with connector, two wire ties and instructions. The kit does require some soldering Seller: n9tax ️ (5,668) 99.6%, Location: Hebron, Indiana, Ships to: US & many other countries, Item: 222236729091 Authentic N9TAX VHF/UHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpole. eabyAuc dual 16 Connector Options The UHF Female (so-239) is the default connector. If you prefer different it is imperative that you message me the connector type immediately after ordering.This antenna is.
Dual Band Dipole 2m / 70cm Vertical Dipole Antenna with mast and flush mount. AU $64.69. Free shipping . Authentic N9TAX VHF/UHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpole. AU $33.66 + AU $6.53 shipping . Authentic N9TAX VHF/UHF Slim Jim J-Pole For HT 2m 70cm Antenna 16' Coax. AU $40.1 That said, it's a standard J-Pole for both bands. Works fine but not much better than a good 1/4-wave based dual-band ground plane for each band as far as gain. With J-Pole type designs, you basically are just trading the need for the lateral space of the radials with the need for the extra vertical length of the matching stub Dual Band J Pole Antenna Plans. Dual Band Beam Antenna . 4 Element Yagi Antenna Plan . Homemade Yagi Antenna Plans. Dual Band HTEK Dual-Band 2m/70cm Yagi. 3 elemente 2 Meters and 5 elements UHF. Light weight, great for fixed, portable or indoor mounting. Frequency.. Diamond Antenna X50 Dual Band Base Antenna (2m/70cm) 100 2 100 0. 2 Review(s) | Add Your Review. Quick Overview. The Diamond Antenna X50A / X50NA is a dual band 2m/70cm high performance gain vertical base antenna for base/mobile two way radios. Availability: In stock . $89.99. Email to a Friend *Connecto The original idea came from the Arrow Antenna open stub J-Pole which is made and sold by Allen Lowe (NoIMW) for $39. http://www.arrowantennas.com/osj/j
Pattern — Pat tern, n. My main shack location has a commercial 2M J-Pole Dual band mounted on a short mast. The distortion of the pattern is due to current induced on the outside of the feedline by the antenna -- the radiating feedline is as much a part of the Flexible and Small - The two wider planes had exchangeable bottoms to give the. . Dual Band J Pole Antenna for 2m & 70cm 2m ¼ wave section 70cm ¼ wave section Driven Element Inner Conductor connected Driven Element . Advantages of a J Pole Antenna Broad band coverage Ground independent Gain over an Isotropic antenn The best part about it is that it can be used on 2m and 70cm and it is cheep and easy to build. I built two versions -- one free standing and one backpack version for camping. About the J-Pole. The J-Pole is an older antenna design that's been around a while, but not widely used or thought of these days After I got and finally installed my ICOM 2300A 2m mobile, I needed at least a 2m 'mobile' antenna: I made a Dual Band 2m 70cm Slim-Jim (modified version of; I also wanted to use it for 70cm on the Yaesu FT-857D when parked at home or camping) The Slim Jim antenna was constructed with 3/4 PVC and Stranded # 14 THHN wire for the 2m element Dual-Band 2m and 70cm Yagi antennas. Premium quality anttennas for two bands. Perfect gain and SWR on both bands. Optimized for 144 - 145 MHz or 144-146 MHz and 432 - 434 MHz or 430 - 440 MHz. Excellent 2m 70cm Yagi anatennas for balcony use. Common conn
. 220 Super J-Pole Antenna by KA0NAN, May 1996. 440 Super J-Pole Antenna by KA0NAN, April 1996. Simple J-Type 10m Vertical by W6IOJ, Sept. 1995. Copper Dual-Band Super J-Pole Antenna by KA0NAN, April 1993. (can not obtain good VSWR on 440 but the 2m gain is outstanding - about 6dbd worth! 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. The design is based on an article that appeared many years ago (1987) in CQ magazine, a version is produced by Arrow Antennas in the USA This 2m and 70cm dual bann J-Pole antenna breaks down into a space about 10 by 6 and 7 pieces once assembled. This is a SOLID antenna engineered not only for performance but also for portability and fool-proof assembly · J Pole design picture · J-pole antenna for 440 Mhz · J-Pole Antenna Project - Copper Cactus Dual Band -2M/440 · J-Poles Again -- From Stephen R. Yates, AA5TB · J-Poles Exposed-- From Gary E. O'Neil, N3G RadCom VHF/UHF JPOLE Base Antenna 2M/70CM 144-148 MHz + 440-450 MHz . Features: Dual Band UHF/VHF Operation With NO Compromise in Performance; No ground required - Use on vehicles, vent pipes, or in the attic; Heavy duty solid aluminum construction (not tubing) - power rated 1500 watts; Unique design allows full 360 degree omni-directional coverag
2 Meter Antennas 2M/440 MHz Dual Band Copper J-Pole From N7QVC 2M Fan Antenna (Yes From an Electrical fan) 2 M 1/2-Wave J-Pole-- VHF-FM (Stealth) Antenna Made From 450-Ohm Ladder Line -- From KB1GTR & KB1DIG 2M Self Supporting J-Pole for Emergency Use-- From Bob Hejl W2IK 2M Log-Periodic Dipole Array -- From The ARRL 2m 8db collinear for. Details about Authentic N9TAX VHF/UHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpole SEE DESCRIPTION! Connect many radios. You supply cable! 1 sold in last hour. Authentic N9TAX VHF/UHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpole. Item information. Condition: Brand New. Quantity Antenna, Vertical, Dual-Band Base/Repeater, Fiberglass, 2m/70cm, 200W, UHF Female/SO-239, 5.6 ft. Height, Each It works well on both 2m and 70cm. None of my J-pole or slim jim antennas recieved any signals on 70cm. I would recommend it to anyone that wants an easy install antenna with no tuning required 2m - 70cm dual band j-pole make your balun and antenna center insulator look professional multi band dipole 10 to 80 meters soundcard interface 2 element 2m portable antenna 2m dipole antenna note: all projects seen were built by ve3elb.
J-Pole masts are not part of the antenna. J-Poles have a DC ground point. J-Poles don't need radials. J-Poles need radials. J-Poles Smoke the Competition. Longer is better. A 2m J-Pole is dual band on 70cm. J-Poles are cheap to build. J-Poles do not need to choke the coaxial cable We test a popular VHF/UHF dual band antenna at various angles to reveal antenna tilt on a vehicle matters only in certain circumstances. Categories Antennas Tags 2m, 440, 70cm, Analysis to suggest you really can use a 2 meter J-Pole in the 70cm band. Categories Antennas Tags 2m, 70cm, J-Pole The Dual Band J-pole antenna (6Mtr and 2Mtr bands) constructed and used at my previous residence in Melbourne, Victoria from 2001 - 2007 Due to space limitations and the need to keep the visual pollution of too many antennae to a minimum I required antennae that are able to cover multiple bands Another interesting quirk of the Baofeng GT-3TP is that most handheld radios these days have a higher power output on the 2m band than the 70cm band, not this one! The Baofeng GT-3TP outputs only 2.9 watts on 2m but ups that to 4.5 watts on 70cm. That makes the Baofeng GT-3 dual band unique in my collection of handhelds Dual band 3 Elements x 5 Elements 2m VHF / 70cm UHF Yagi Antenna (Lightweight End Mount) Original Handcrafted / Quality Build (Antenna data Generated with 4NEC2) VHF Gain: 7.26dBi see 4Nec2 sim @ 144Mhz Frequency: 140-150Mhz. UHF Gain: 10.7dBi see 4Nec2 sim @ 432Mhz Frequency:430-450Mhz Matching: Gamma Match (Tuning stub) Impedance: 50 ohm
We have 2 X 19.5 and 2 X 6.5 radial rods not yet attached. Arrange the radial rods, making sure the 19.5 VHF rod is in between the 2 X 19.5 radial rods and the 6.5 UHF rod is in between the 2 X 6 radial rods Attach the 4 radial rods with screws and nuts, putting in washers in between. Before tightening the screws, align the 4 radial rods so that they are 45 degrees of each other horizontall Dual band GP is like two single band antennas have merged, one rotated by 45° arround the z-axis. Connections are the same for the two antennas: radiator is connected to the same hot-end of the connector, and grounds are connected to the same mass. This way there is no limit to how many bands antenna can be made May 19, 2014 - Two DIY dual band antenna's I built for VHF/UHF. May 19, 2014 - Two DIY dual band antenna's I built for VHF/UHF. May 19, 2014 - Two DIY dual band antenna's I built for VHF/UHF. . Radios. Two DIY dual band antenna's I built for VHF/UHF. Saved by Gary Stephenson. 228. Radios Antenne Fm Radio Amateur. v.1 12 November 1992 r.2 J-POLE ANTENNA FOR 2m W. Kinsner, VE4WK 1 of 3 1 2 3 4 5 6 7 8 E D C B A E D C B A 1 2 3 4 5 6 7 8 5 June 1992 Q = 2807/f[MHz] = 19-3/16 [W.
Seller: cqradiosupply (40,109) 100%, Location: El Dorado Hills, California, Ships to: US & many other countries, Item: 401688089979 JETSTREAM JTBM270 3-ELEMENT 2M 5-ELEM 70CM DUAL BAND VHF UHF YAGI BEAM ANTENNA. NEW Jetstream JTBM270 dual band yagi beam antenna for 2m and 70cm. Independent element type (3 elements for 2M VHF, and 5 elements for 70cm UHF) ensures a high gain and performance in. 2m-70cm antennas super jpole, VE3ELB Frequency 144 MHz, 1,417 meters 4 feet ,7.79 inches - Frequency 440 MHz,0,463 meters, 1 feef, 6,26 inches: A 6m J-Pole Antenna using Ribbon Cable, G4AON The antenna shown here includes a coaxial cable choke feed to remove RF currents from flowing on the outer of the cable: Simple 50MHz-J-Pole-Antenna, DK7Z This is a project of an easy to build dual band (UHF and VHF) j-pole antenna done with a common TV twin lead and some coax cable. Original PDF document can be downloaded here Related Posts via TaxonomiesGAP Titan DX MaintenanceThe gamma matchWindom Antenna 10-80A 40m Vertical AntennaThe Grid YagiQuickie VerticalAbout Loop AntennasAntenna Basics :Read More..
The Original Ed Fong Dual Band VHF/UHF 70cm/2m J-pole Simplehamradioantennas.com DA: 30 PA: 50 MOZ Rank: 24 J - Pole antennas for the 2m and 70 cm (VHF/UHF) Amateur Radio bands come in many sizes, ranging from commercial models based on public service designs to homebrewed configurations using coaxial cable, 450 ohm ladder line, or even TV twin. Saved from ve3elb.ham-radio.ch. 2m-70cm Antennas. No Summar • If the antenna is to be placed outside, do not use brass. S11 of our 'photo-model', designed for 2.45 GHz. A capacitor of 0.8 pF and it would be perfectly matched to 50Ω
VHF/UHF Beam Antennas. Boost your signal with our selection of VHF/UHF beam antennas! 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 Here it is! The Wouxun KG-UV7D is a high power dual band radio loaded with powerful features at an affordable price. With a whopping 7 watts VHF on 2 meters, and 5 watts on the alternative band the KG-UV7D provides the RF carrier power of a high end portable handheld without the high end cost. Available in 2M/70cm (UHF 420-450 MHz), 2M/1.25M. Model # Band Stacked Element Phasing/ Wavelength Gain/dB Watts Connector Type Weight Lbs. Length Foot Wind MPH; X30A: 2m / 70cm: 2m: 1 1/2l 70cm: 2 5/8l: 3.0 / 5.5 : 15 Cheap VHF/UHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpol,You can get more details about VHF/UHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpol:Shopping Guide on Alibaba.co Premium KB9VBR J-Pole Base Antenna 2 meter dual band amateur ham radio scanner DELUXE MODEL ROLL UP 2M/70CM ROLL UP J-POLE/SLIM JIM ANTENNA WITH 10FT COAX End Fed Dipole 80-6 meter Portable HF Antenna Matchbox System. HIGH QUALITY 2 meter/70cm Dual Band Collapsible Copper J Pole Antenna by KC0SDV Free shippin
Characteristics. The J-pole antenna is an end-fed omnidirectional half-wave antenna that is matched to the feedline by a quarter wave parallel transmission line stub of Lecher system form. Matching to the feed-line is achieved by sliding the connection of the feedline back and forth along the stub until an impedance match is obtained. Being a half-wave antenna, it provides a small gain over a.