Counterpoise for mobile antenna

Screws onto the base of the antenna. But, first, to better appreciate the characteristics of this portable antenna, I believe it is important to first review the characteristics of its bigger cousin: the base station HF vertical. An obvious solution if you need concealment and have access to a space like an attic. Compact (less than 15in) portable antenna for your SOTA, POTA or other operation where a small high performance antenna is required. 00 A separate smaller cardboard box is used for shipping the Stinger antennas. A 9:1 balun matches 450 ohms, end fed   Four 35 foot NVIS Elements that can also be use as counterpoise, all of which are for enhancing performance of the FMJ or ProMaster antenna systems. Any 160 meter mobile antenna will have very poor efficiency, perhaps as low as . Scorpion Stinger antennas mount to this adaptor ring as counterpoise antennas or elevated radials. Still seeking a simple antenna, attention was turned to the venerable Vs-wave whip. By connecting a ¼-wave wire (~19” for 146MHz) to the antenna connector outer terminal, we create a physical counterpoise in place of the indirect ground plane through the operator’s body. The Buddistick, SuperAntenna MP1, Pac-12, and a Chameleon (it has various variants) all offer a short antenna with multi band capability. Mar 20, 2018 · Many compromise antennas are the 6 to 12 foot variety. Here is the definition of "counterpoise" appearing in the Communications Standard Dictionary: A counterpoise is a conductor or system of conductors used an earth or ground substitute in antenna systems. Three 25′ long lengths of coax tied together at a common ring terminal. Gain & Wave: 10M and 6M: 1/4 wave 0dBi 146MHz: 1/2 wave 2. How Do We know Counterpoise is Resonant? One way to evaluate counterpoise resonance is by installing a known electrical length Marconi antenna above the counterpoise. Of course it makes an excellent mobile antenna too! Dec 11, 2016 · My counterpoise is about 50 feet (for an approximately 75 foot antenna) and I can reliably work domestic DX and occasionally foreign DX with only five watts output from my FT-817 radio. The AP-10B utilizes a counterpoise to make the antenna function properly. The six needed components for a mobile installation are the radio, power feed, coaxial cable, antenna mount, antenna, and ground plane (counterpoise). It worked fine! (with a little help from impedance matching) Attic Antennas. Mobile Operation With a mobile antenna, for example on an automobile or recreation vehicle, the metal components of the vehicle can serves as a counterpoise. If it's going to be used as a ground for the radio, make it a 1/2 wave length long instead of a 1/4 wave long. May 6, 2019 - Bullet End Fed Antenna System - 71' Antenna (160-6 meters), 50' Coax + Super Noise Filter, Counterpoise Kit - FREE Ship - 500 Watt PEP. Previously that inverted L "stealth" antenna had been worked against a An adaptive antenna system having a counterpoise conductor contained within a housing of a communication device and located distally from such surfaces of the housing that can be held by or placed in proximity to a user or external objects which detune the counterpoise. The HFJ-350M is designed to be used with a counterpoise, 12awg wire Jan 29, 2019 · 7. 3%. CHAMELEON ANTENNA Portable HF Antennas are made with the finest materials available. Both cost so little and are so easy to build that it will surprise you. On the receive side, the standard 160 meter antenna is   4 Aug 2015 The problem of an electrically short antenna is familiar to anyone operating in medium-wave bands. MFJ Enterprises Inc,Ameritron,Hy-Gain,Hygain,Cushcraft,Vectronics,Mirage,MFJ,MFJ Enterprises,Antenna,Radio,Ham Radio,Amateur Radio,Tuner,Analyzer,Starkville,Amplifier The Comet FHJ-350M, Portable 9-Band, 1/4 wave base loading telescopic antenna for HF through 6M. 8. 5 for Normally with a handheld radio the counterpoise (ground) is your own drag long wire counter-poise behind their vehicles for their mobile rigs. If using a MFJ-342 or similar mount attach the ground radials to one of the ¼” bolts located on the mount. Some have been able to erect better wires in the air because the small size of the FCP allowed better placement of the antenna. NOTE—The purpose of a counterpoise is to provide a relatively high capacitance and thus a relatively low impedance path to earth. Can short tuned counterpoises work? Find out as I try a dual band 17/20 metre antenna at the  It is a flat bar mirror mount with a ground plane antenna mounted underneath. Among amateurs there's been a long running discussion regarding the effectiveness of avertical with an elevated ground system compared to oneusing a large number of radials either buried or lying on the ground surface. The two most important ones concerning mobile operation are: (l) The radiation resistance is reduced and the resistance (heat) is increased due to the inductive loading in the coil. 86 A system of conductors elevated above and insulated from ground, forming a lower system of conductors for an antenna. It may DC ground the antenna's base, and it just might RF ground it too depending on the It certainly isn't a counterpoise, although a lot of folks use that term. Lowell, N1LO This is a combination center and top loaded multiband antenna. CHAMELEON ANTENNA Counterpoise Kits are ideal for portable antenna deployment. 16:52. Use the shortest wire for higher This SuperAppNote was previously titled Super Antenna MP1 Pedestrian Mobile Setup Tips. The geometry of the ground plane is important. We can tell you this upfront—the most popular wire-wound CB radio antenna, and our best selling CB radio antenna, is the easy to tune Firestik antenna . As in any vertical type antenna, a ground radial system or counterpoise is essential for maximum results. Interesting idea! Depends on what you want to use that 'counterpoise' for. It comprises four, 10m earth-wires contained on a custom, cruciform shell making it easy to carry and deploy. It is the NR770HNMO antenna made by diamond, and it claims "Radialless mobile gain whip". Home-Base HF Vertical Antenna The base/feedpoint of the antenna was clamped to the wooden test table for the shootout testing. You might consider adding some 450 Ω ladder line, cut to the lengths of the  16 May 2015 Long radials are a hassle with vertical antennas. I have done several Field Strength Readings in the field and in a… However, Guy Olinger,K2AV, has created an alternative – the folded counterpoise (FCP). In electronics and radio communication a counterpoise is a network of suspended horizontal The counterpoise evolved with the Marconi (monopole) antenna during the 1890s, the first decade of Privacy policy · About Wikipedia · Disclaimers · Contact Wikipedia · Developers · Statistics · Cookie statement · Mobile view. SETUP Nov 20, 2017 - What is a Rat Tail? A “Rat Tail”, or counterpoise, is basically the missing part of a whip antenna. The coupler was tuned to resonance on the bench first using a resistive load. All mobile and base transmitting antennas need counter-poise, more commonly called In "no-ground-plane" systems, the coax shield is used for counterpoise. Part of the issue is the requisite inductance of the coil. Dec 11, 2018 · The good news is that we can improve the counterpoise simply by adding a wire to the HT antenna connection. Making up this basic Fishing bag 150mm; Counterpoise (quarter wave length); Antenna tuner; Feeder   8 Feb 2014 You would construct a counterpoise antenna wire 11. Finale. This antenna was measured both "with and without the counterpoise" by request of the manufacturer. Apr 21, 2018 · Antenna Counterpoise, misconceptions and mistakes with building a rat tail - Duration: 16:52. It's unclear to me how much of the effectiveness claimed for this antenna by its enthusiasts comes from radiation from the counterpoise that provides "the other half of the dipole. the counterpoise to an inverted L antenna which was operated against those counterpoises as an all-band antenna fed by a "tuner". Insolating bushing is needed to isolate the antenna from the tripod and ground. Pick either antenna to build and put it up as high as you can safely do. That is all for now, feel free to contact me with questions, or if you're on Facebook, check out my Facebook ham radio help page. " If I can lay out a counterpoise, I'd be inclined to put up the whole dipole, and forget the MP-1 altogether. VHF and UHF antennas need proportionally smaller ground planes than HF, and many mobile antennas will actually behave reasonably well with almost no counterpoise at all, though antenna efficiency and radiation characteristics are likely to improve when it has a good solid ground. Made by Super Antenna, designed as part of the /backpack /base /travel /mobile /portable antenna system for Ham Radio. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Enhancing Omnidirectional NVIS and DX for the Alpha HD-FMJ and ProMaster Antenna . It has no gain. A Closer Look at Vertical Antennas With Elevated Ground Systems Rudy Severns N6LF . 30 Apr 2020 My entry into Ham radio was from modified broadcast radios, and the very active 160-meter mobile group in Toledo, Ohio. Frequency: 40M to 10M This 5cm high box has a simple tuning interface which has 4m of counterpoise to be extended out over the ground using the control knob between A - L to define the I see a quarter wave horizontal mobile antenna for the 20 meter Ham band. They can be used for multiple purposes such as Base Station, Portable, Mobile, Marine, EMCOMM, MARS/CAP, ARES, SATERN, RACES, First Responders, Emergency Preparedness, SKYWARN, Military and Government communications and much more Find CHAMELEON ANTENNA Portable HF Antennas EMCOMM-II and get Free Standard Here I am talking about true handheld operation rather than setting up a portable QRP station with a "proper" antenna. Check to make sure the ground system does not come into contact with the screwdriver antenna. It features a fiberglass center load. The GP2 is an omnidirectional unity gain adjustable ground plane antennas GP2 is a quarter wave radiating element with the radials acting as a counterpoise . All need a decent ground or counterpoise to work against. 00 for the whole show. Called the Outbacker in honor of its Australian origins, this rugged yet attractive antenna soon began to show up on the bands and to receive soma nice reviews in amateur radio publications. •Need lots of room, keep them away from metal objects like heaters and ducts •Wire antennas can be run near the peak of the roof inside the attic, bent in odd shapes to match the space available. As stated before, a counterpoise is only useful when using actual handheld antennas as a portable. That being said, some brands are better and more popular than others. Many antennas have a ground plane built in, but in particular magnetic mounted antennas (often kitted with mobile boosters) require one be provided. My antenna's name probably reflects the fact that its design is derived from a military model. ] 46″ Models: HamR-7 HamR-7Digi HamR-7WARC 20″ Models: 6 Foot 6 Inch Military Type Heavy Duty Steel Tripod with Mast $ 134. Alpha Antenna offers four optional 35 foot NVIS Elements, which enhance the performance of Near Vertical Incidence (NVIS) and DX for either the HD-FMJ and ProMaster systems when either is[…] I bought this antenna for my 817 for portable and indoor use as I can't get a outdoor antenna up. Counterpoise and RF Grounding a mobile antenna Nashua Area Radio Society › Topics In All Forums › Elmering Forum › Counterpoise and RF Grounding a mobile antenna This topic has 8 replies, 4 voices, and was last updated 2 years, 5 months ago by Tom Mahon . Good ohmic grounding and RF counterpoise will pay good dividend. A tuning circuit is coupled between the counterpoise conductor and a ground. Scorpion Stinger counterpoise antennas shipping and handling is $40. ‘no counterpoise’ antenna gave a lower measured field strength than the reference antenna which was a 10m long vertical wire, fed against 10 random length buried radials and matched with the same auto-tuner that was used for the ‘no counterpoise’ antenna. (2) The "bandwidth" of the antenna will be reduced. The SWR is 1:15:1 at resonance and the bandwidth is 6 MHz (@5:1 SWR). This Mobile Antenna is designed for the use with the FT-8900 or multiple radios. Fishing bag 150mm Counterpoise (quarter wave length) Antenna tuner Feeder A reference antenna must be a known, consistent, reliable, performer. Of course, that meant that if the antenna was A loop antenna is one of the very best - IMO. As suggested this antenna needs a ground plane to provide the other "half" of the antenna. This unit is supplied with our home install package. Even if   Thoughts on using the Superantennas MP-1 portable antenna, by Julian Moss G4ILO. Attach the counterpoise system to the ground shield of the feed-line. Because of space limitations, I use the 10-20 version of this antenna. Oct 20, 2018 · A long, not particularly resonant, antenna made up of a long element and a counterpoise. 15dBi 446MHz: 5/8 wave x 2 5. 11 Dec 2018 Posts about Counterpoise written by AF5NP. Almost every radio amateur has an FM mobile radio in his car, either to talk  Buy TWAYRDIO UHF/VHF Mobile Ground Plane Antenna Enhance Signal UHF Not all the counterpoise wires are well made and cannot be threaded into the  As any mobile antenna the SD-330 requires the body of the car as counterpoise. 30 ft up to the base of the antenna will work quite well. If you notice the noise level go up and an increase in SWR readings (higher SWR readings would Antenna system: RHF Single Band HF Mobile Antenna fitted with 3/8th thread (also know as a Hamstick) Chameleon Jaw Mount (Hamstick mount) 105ADT Heavy Duty Stud Mount 3/8 Fit Optional items. An FCP improves an antenna system by replacing more loss with less loss. Disclaimer. In my case I followed the ‘ladder line method‘ where the antenna and counterpoise are as a single piece of ladder line for 17ft and the remainder antenna wire is just normal wire. So is a dipole. Nov 06, 2018 · Pet (N6PET) found a high SWR on his Comet SBB 15 6M triband mobile antenna. Does a random wire HF antenna (RECEIVE-ONLY!) require a counterpoise? I'm making an 84 feet (1/4 wave) random wire antenna to hang outside my house that I will be using ONLY for reviving HF transmissions on the 80, 40, 20, 17, 15, 12, and 10 meter bands, received through my Software Defined Radio. 5 inch for VHF, 6. Figure 6 - SWR vs "Counterpoise" Length vs Turns Ratio for an End Fed Half Wave Free Space Antenna. Even if the manufacturer supplies you with an entire kit (coax, mount & antenna), this, in most cases, leaves you without the counterpoise requirement. Frequency can be changed by means of shorting plug. You may want to substitute copper coated wire or aluminum pieces for the tape measures in case you need to solder the counterpoise to the antenna base. In stock fast delivery call now Hambid for Ham radio, scanners, DAB, Shortwave & CB radios sales@radioworld. So it looks like the original Zepp antennas and a little bit like this A ground plane antenna (which all land mobile CB antennas are), needs to have 2 things, an adequate radiating element (radiator), and an adequate counterpoise or ground plane (GP), usually the body. By mounting the antenna on a 2M quarter wave counterpoise made from 2 speaker wires, he was able to drop his SWR below 1:3:1 for the frequency range of 50-54 MHz. INTRODUCTION . The best CB antenna for you is the one that best suits your needs and the type of vehicle that you're putting it on. Artificial Grounds, Testing a Counterpoise The antenna is a ladder-line fed, 80 meter dipole used on all bands. Antenna's that are not mobile usually employ a system of radial wires emanating from the antenna's base. c. 5:1 or less Max Power: 10M 120W SSB 6M 200W/100W FM 2M -70cm: 100W FM Length: 54" (approx) Weight: 1 lb’ 6 oz Connector The Comet FHJ-350M, Portable 9-Band, 1/4 wave base loading telescopic antenna for HF through 6M. So it turned out pretty inexpensive for a compact 3-band antenna. You can consider it to be something like an actual Dipole antenna on your HT. The graph below (fig. A system of conductors, elevated above and insulated from the ground, forming a lower system of conductors of an antenna. uk Response in 24 hours Amateur Mobile Antennas The Hustler CG-144 is a 2 meter collinear mobile antenna providing a big 5. Cheap Walkie Talkie Parts & Accessories, Buy Quality Cellphones & Telecommunications Directly from China Suppliers:YIDATON antenna counterpoise Mobile  Buy Wonder Wand Tunable Counterpoise Wonder Portable Antennas online at £ 59. When we look at how the word has been commonly used, we see general use and dictionary The manufacturer claims no counterpoise is needed. Secure the antenna in place using a 9/16” wrench. Random wire antenna, version 3. They also claim the antenna is "resonant on 80, 40, 30, 20, 17, 15, 12, and 10m. Are you saying it is an end-fed dipole which is a quarter wave on each section, and then the little coil in the middle separates the dipole? $\endgroup$ – Skyler 440 Feb 16 '15 at 14:33 N2UGB Rating: 2008-07-18; 10-20 model WITH counterpoise Time Owned: 6 to 12 months. [Smaller overlapping sheets may be used. I always thought the  The CHA EMCOMM II Antenna has been specially designed for backup emergency HF systems or counterpoise wire is not used, the coaxial cable must be 25 to 100 feet in length, as the our first and classic broadband HF mobile antenna. Why Radials or Counterpoise? • An ideal radial system: –shields the antenna from the earth –provides a path for return current –Provides a return path for fields produced by the antenna • A counterpoise provides only the return path –More about counterpoises later Lencom’s LT006 is a light-weight counterpoise designed for use in tactical environments. It will improve the functionality fairly dramatically, though, and it will affect the resonant point of the antenna, which in turn can affect the SWR on your frequencies of interest. 00 THIS IS: The model MR4010 SuperWire Radial Set by Super Antenna. Antenna (Counterpoise) Ground is the other half of the antenna. This antenna can handle up to 200 watts. (Note: The Stinger antennas “counterpoise antennas” are dropped shipped from the manufacture. the counterpoise and let it dangle. Counterpoise Wire – 25 foot wire for use as antenna counterpoise. I would get about 50 ft of decent coax and work with that. Wonder Wand products online from ML&S Martin Lynch  Mobile Antennas. Since an antenna must be at least 1/4 of its radio's wavelength, nearly all CB antennas have to be a compromise of either the radiator, or the GP. The wood structure is pretty transparent to Product Description. Abstract: Monopole antennas are quite attractive to mobile and portable radio system counterpoise or ground plane, hence the name ground plane antenna. Part of omnidirectional cellular antenna design is a ground plane - or metal that reflects signal into the antenna itself. •Many types of antenna can be mounted in the attic IF you don’t have Radiant Barrier (Tech Shield). Very basic, but the antenna works. The CHA COUNTERPOISE KIT is comprised of the following components, see plates (2) and (3): a. 2. The Outbacker All-Band HF Mobile Antenna. The HFJ-350M is designed to be used with a counterpoise, 12awg wire Sep 14, 2018 · The addition of a counterpoise wire to the 1/2 wave whip makes little difference in performance. The truth is, it is a waste of resources, as the effectiveness is so slight, you couldn't measure it with laboratory-grade equipment! The same can be said of "V" configurations of two identical mobile antennas. $\begingroup$ The lack of an RF ground/counterpoise isn't going to prevent the antenna from working altogether. At radio frequencies, a sheet of metal such as the roof of a metal car is reflective, just like a mirror. This can be provided by adding (one or more) 1/4 wavelength radials for each frequency in use. DX Store Counterpoise kit for HFJ-350M/HFJ-350M Toy-Box (or similar antenna), 130FT length, suitable for 6M-160M, includes wire, jumper with alligator clip, end insulator, and wire reel. 5dBi VSWR: 1. As a bonus, they may also serve as guy wires Find CHAMELEON ANTENNA Counterpoise Kits COUNTER-KIT and get Free Standard Shipping on orders over $99 at DX Engineering! This so-called counterpoise (a misnomer to be sure), is typically in the form of a spirally-wound, ham-stick-type antenna. one half sticking straight up and the radials or counterpoise making up the other half. By adjusting the counterpoise length, you will be able to compensate for varying conditions due to surrounding objects, grounds, etc. But don't touch it, you'll get a shock near the end of it. It does not need to be straight. 95 from Ham Radio. Of course the more radials the better however for a portable antenna use as many as you can deploy. Even an antenna 13 feet in overall (electrical) length will require an inductor in the neighborhood of 600 uH. The 20″ & 46″ COMPA Ctennas req uire only a small, minimum 3′ x 3′ metal sheet/mesh/grating below it. Isolation Ring – insulates Counterpoise Wire (b) from Tent Peg (e) and ground. Results of a 12-month road test. Line Winder – Plastic winder used to store counterpoise wire. 7) is of actual measured data of an end fed half wavelength antenna with an isolated coupler using an 8:1 turns ratio. The gamma matching section made it even more top-heavy than the J-pole. and uses a similar design to all the best-performing mobile HF antennas. ) In electronics and radio communication a counterpoise is a network of suspended horizontal wires or cables (or a metal screen), used as a substitute for an earth connection in a radio antenna system. (in theory) perform better than the ¼-wave monopole (shown with 5/8-wave mobile whip): can improve the counterpoise simply by adding a wire to the HT antenna connection. An FCP is not magic. 2 dB gain with an optimum low-angle radiation pattern. It is for transmitting and receiving on HF radio frequencies. It is also tunable on 10 meters & 6 meters. A really good one perhaps 1%. Try adding a wire one-quarter wave long to the ground connection on the box for 17 and 12m. 5' for 20m). While these lengths have been shown to work well on many bands   25 Sep 2018 Latest News · GNSS · OEM · UAV/UGV · Mapping · Survey · Transportation · Defense · Machine Control/Ag · Mobile · Subscribe · COVID-19  Antennas for 160 meters on a standard half acre (~100 x 200 ft) suburban house lot pose quite a problem. Instruction Sheet 16 Apr 2015 I think the question is how the frame will act as a counterpoise. Ground Tuning units (GTU's) for all portable and mobile HF systems discussed by I get many enquiries on my station equipment especially the antenna. Can short tuned counterpoises work? Find out as I try a dual band 17/20 metre antenna at the beach. Take care and Jun 25, 2012 · Although the nominally correct length for a counterpoise is a quarter of a wavelength it must be noted that the optimum counterpoise length is very dependent on the antenna situation, how close to the ground it is and what other grounding (such as power supply cables) is present. Each counterpoise was "tuned" to length by adjusting for maximum current in the countepoise for that band. b. co. I still don't understand how it works without another counterpoise. Bicycle-Mobile Antennas By Steve Cerwin, WA5FRF and Eric Juhre, KØKJ/5 vertical half-wave was just as bad, if not worse. However, finding the optimum length of counterpoise for each band is tricky. It is for all Super Antenna MP1 series portable HF antenna systems. Normally a wire, one-quarter wavelength long. Mountain Parameters 1,578 views. The addition of a counterpoise wire to the 1/4 wave whip makes a stunning and advantageous difference. During the last sunspot maximum it was possible to work some impressive DX using just a 2. d. It is used with radio transmitters or receivers when a normal earth ground cannot be used because of high soil resistance [1] or when an antenna Counterpoise definitions can be found in dictionaries. Bar Code/EAN: 5056109223753. 33 Comments most will take the time to design into the mobile platform the best ground-plane field they can contrive for the May 16, 2015 · Long radials are a hassle with vertical antennas. Buy Diamond MAT-50 Counterpoise Magnet Mat from Radioworld. . By that definition, a single radial  2 shows a vertical antenna with an elaborate ground wire system buried under the surface of the earth for the purpose of obtaining low loss resistance connection  32, "An Unorthodox Antenna") is an 84' long end fed and a 17' long counterpoise (6. A counterpoise will not be needed when using a mobile antenna like a Tram 1185 or Nagoya UT-72. Jun 27, 2017 · If you have a steel railing on the balcony that’ll probably provide enough of a counterpoise. For what it is the antenna works great. If the grounding is not sufficient (especially on the low bands 80 and 40m) an  Ground System Test, Counterpoise. In this case, Mike Hannah creates a "slinky" vertical antenna with a counterpoise fashioned from steel tape measures. The MFJ-931 tunes the counterpoise to series resonance which in turn, translates into improved ground efficiency and improved antenna performance. Here are some of Mike's observations: Enables you to use your mobile antenna as a base station mounted on a tripod. 10-80m MOBILE HF MULTIBAND ANTENNA PROJECT February 17, 2001, by Mark D. Note#4: Miracle Antenna Miracle Whip [no counterpoise]. " I think you might want a counterpoise for use on the WARC bands. The usefulness of the MFJ-931 is not limited to resonating a counterpoise. Small Ground Plane/Counterpoise Most antennas require large ground planes with lengthy ground/counterpoise radials all-around the antenna. I have several VHF ground plane and discone antennas in my attic. Antenna Grounding Planes. uk 01922 414796, for all your radio needs. This antenna terminates to 3/8x24 stud. If it's to be part of the antenna system, it isn't gonna work very well 'cuz it's in the wrong 'place'. 5W portable, a base loaded whip antenna and a short counterpoise wire. My 160 meter mobile antenna, even though less than 1% efficient, ties or beats some large home-station antennas. The design was not intended for active use while in motion as a Pedestrian Mobile antenna. The basic antenna kit is a smaller box, it is placed inside the main antenna tube. A little over a year ago, a new mobile antenna became available to the ham radio market. I purchased my set of Hustler resonators, the base “stick” and adapter plate from Texas Towers for about $100. The ladder  Mobile Antennas WA4DXP wave antennas need matching. The key to these antennas is to have an elevated counterpoise. Placing radials in  Vertical HF whip antenna for mobile or base operation. Any monopole antenna such as the ATAS-120 is designed with the assumption that it will be mounted on a ground plane. Howto Repair the MFJ 1899T ATX-Walkabout QRP Ham Radio Feb 08, 2014 · Improve Your HT Ham Radio By Adding A Counterpoise Antenna Wire. One solution is the counterpoise ground  Centimeter-accurate smart-phone positioning will enable a host of new applications such as globally-registered fiduciary-marker-free augmented reality and . 86 counterpoise. Whenever anv sertical antenna is shortened from its full physical 1/4 wave length it is compromised in certain ways. 3/8 stud mount; 4 meter Cable with PL-259. The six needed components for a mobile installation are the radio, 12V power feed, coaxial cable, antenna mount, antenna, and ground plane (counterpoise). The MFJ-1714 bests the stock antenna although that little antenna holds its own surprisingly well for its size. IMPORTANT NOTE: 18-wheelers, most likely you want install your NEW Hi-Q antenna on the  2. (More on this antenna below). These radial systems create the ground plane needed to increase the efficiency of any portable vertical antenna. The Wonder Wand (TCP) Tunable Counterpoise is a portable ground radial system designed to be plugged into the 4mm socket on the side of the Wonder Wand antenna. I have it paired up with my Z817 tuner and 1 counterpoise wire and it loads up with a perfect match. It gets a good boost in efficiency from the capacity hat which, unlike the commercial bugcatcher antennas, is located where it should be: as high as practical on the whip. counterpoise for mobile antenna

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