446 mhz antenna length. 09 - Folded Marconi Tee Antenna. Without the telescopic inserts the total tube-element length is 120 mm. Solarcon - IMAX-2000 CB/Ham Radio Base Station Vertical Antenna, 24-Feet. Get The Card, Get The Gear, Get On The Air. How to Calculate Antenna Length for Frequency?. Antenna has a type N male termination. The Moonraker AMPRO-80 is an HF mobile antenna …. Super Antenna MP1DXTR80 Tripod All Band MP1 HF Antenna. All I had Preview Product Rating; 1: Dualband Antenna 2meter 70cm Mobile VHF/UHF Ham Radio (137-149, 437-480 Mhz…. Frequency: 144 / 430 MHz Gain: 144 MHz 3. Most Comet mobile antennas over 29″ length have a fold-over hinge built into the base section of the antenna. 100 diameter whip: Model # 5DB + frequency, Rubber duckies antenna yagi base station 1/4 wave 5/8 wave colininer antenna flexible MHz…. Band Notes: Primarily used in United States, United Kingdom, Ireland, Norway, Frequency Range: 28. 1 406 Lesson #62 Chapter — Section: 9-2 Topics: Radiation characteristics Highlights: • • • Antenna pattern Antenna …. 3 # Mounting: Pole bracket # Weight 2. CB) propagate further over open terrain, but higher frequencies (i. EXAMPLE of Whip Antenna Calculator: INPUTS : Frequency = 900 MHz, Length = 12 inches, Diameter = 0. A balun is probably not needed in your application. 146/446 MHz Mini Dual-Band Mobile Antenna, Gain: None / 2. Assuming you want to make a 1/4 wave grounded vertical, divide 234 by the frequency in mhz…. Click Here For ADVANCED SEARCH Options! 146 MHz 4. Of course you can pick your own band by simply changing the frequency to say 145. Collinear Antenna Calculator. K6JCA: Building an HF Directional Coupler. Sweep the antenna from 440 MHz to 450MHz -the SWR should be between 1. The warranty period for this product is 24 months. The basic formula for determining the length of a center fed, half-wave wire Dipole or Inverted Vee antenna is:. On the other hand, if you will be using your walkie-talkies indoors or in situations where you will have obstructions between you and the other party, then you should set your walkie-talkie to an ultra-high-frequency range between 403 MHz and 470 MHz. Key features: Type: Helically wound mobile antenna Frequency: 3. Mount the antenna atop the Hat Tree. (view on amzn) The NAGOYA NA-771 antenna is Tx optimized for 140-150 MHz and 420-450 MHz. Eightwood 4G LTE Antenna 3dBi SMA Adapter Glass Mount 3m …. Example Antenna #1: 146/446 MHz Dual Band Mobile Antenna The antenna in the green, plastic envelope (from the image above) is a high power dual band antenna used by HAM radio operators. Uses Gasket B10505, which is Not Included. 6m Flower Pot Antenna - Welcome to the G…. Again, longer antennas have more gain, with figures between 3 and 6dB being common. 220 MHz Antennas; UHF Antennas; 750-960 MHz Antennas; Dual Band Antennas; Mobile Accessories & Mounts; Length, in: Per OEM antenna. Typical vehicle installations include surface mount to ambulances. Experiment with radiator length…. Quarter-wave whip antenna on an FM radio for 88-108 MHz Rubber ducky antenna on UHF 446 MHz walkie-talkie with rubber cover removed Most receivers are set for 50 ohms input and the matchbox is necessary unless you have a builtin tuner 025MHz • Length / Weight : 0 This is a soft flexible antenna able to withstand more 'roughness' than a stock. Alternative antenna versions to the AV / AVB, the AVH or AVHB are exactly same in styling and specifications except that they have a hinge fitting at the base to allow for adjusting the angle of the antenna; this makes the total length 125. Please visit us today for all your ham radio needs! 146/220/446 MHz Tri-Band Mobile Antenna…. Order FOB Price; 100 Pieces: US $1-10/ Piece: Port: Xiamen, China: Production Capacity: 50000units/Momth: Payment Terms: T/T, Western Union, Paypal, Money Gram Contact. Around here, if someone was having any length conversation on 446 MHz the ham community would be both surprised and pleased to see the activity. MFJ-989D 1500 Watt legal limit Antenna The MFJ-969 Antenna …. 99 11 watching Lot of 2 Sirio Bull Trucker 3000 3/8 w/ Shaft CB 10M Mobile Antennas Green LED!. 38 - Off-center-fed Full-wave Doublet Antenna. I have long been intrigued by the magnetic loop antenna and have been reading widely on the Internet on the subject for some time. > 446 Portables > 446 Accessories > Analogue > Analogue Accessories > Parts. 9 db gain for stacking 2 antennas …. April 26, 2018 Score Card Comments 0 Comment. THE FIRST LICENCE FREE 446 MHz MOBILE PMR446 TRANSCEIVER IN THE WORLD, Midland introduces into the market the first vehicular PMR446. UHF - This covers 400 – 470 MHz at 2:1 VSWR at the band edges. 75 MHz wire 5 Source 2 Voltage = 171. This antenna performs exceptionally well in the following frequency bands: 698 - 960MHz, 1700 - 2170MHz, 2300 - 2700MHz & 3400 - 3800MHz. 65 / frequency in Mhz: Full wave loop (feet) = 1005 / frequency in Mhz: Full wave loop (meters) = 306. Quater-wavelength in meters: 71. RF Solutions 1/4 WAVE LENGTH WHIP ANTENNA, SMA90, 915MHz. PMR-446 - CB - Free licence PMR446 / DPMR446 vertical antenna HF + 50 MHz diamond CP room, the maximum applicable power 200 Watt (SSB), an impedance of 50 ohms, better VSWR of 1, 5, 4. Theoretically the coil inductance should be around 1. AS-2189 : AS2189 : Antenna: Overall Length: 75. 7 MHz, making it ideal for CB and 10m amateur use. Flexible 1/4 Wave Slim Antenna Non Hinged 155-174 MHz - VHFAFQNT-H6A. The diagrams show headings and distances to area cities as well as red. 4 GHz), ISM (868 MHz), DCS (1800 MHz), PCS (1900 MHz) The 4G LTE Antenna application for 3G 4G LTE Router WiFi DTV Mobile Hotspot Huawei TP-Link 3. This communication standard includes 8 channels with a step of 12. 630 307 8439 0044 02 Antenna 868 MHz 4027 5022 13 Antenna 915 MHz 4027 5022 14 Cable-Antenna, 2,5 m 868/915 MHz …. 8:1 across the whole range with a minimum at 446 MHz Very minor adjustments can be made by raising or lowering the 70cm rod More adjustment requires a different length rod SWR Sweep for 70cm of this design 22. It is almost double the length of the SBB2 but my SWR analyzer showed a near perfect SWR for 2 meters. The results are conveniently displayed in inches, centimeters, feet and meters. Why spend your time assembling cables and connectors yourself? Choose a ready-made cable instead! Messi & Paoloni Ultraflex 10 pre-packaged …. 903 MHz, while 15 and 10 meters are at 21. ): 495 mm -Mounting mast: Ø 35-54 mm : Download. The Miniscan is a wideband receiving antenna in the range of 100-1200 MHz …. Navigate through the other motorcycle categories at . 525mm) elements set into a 3/4'' (19mm) boom which is rear mounted. Where needed, equipment designed for 12. SMA 16CM UHF 440~470 Mhz antenna for VX-350 VX-351 VX-354 VX-160 : Description : 5-162A. When we ship you an antenna, it is pre cut to "Mid" or 151. 15 dBi, Connector: PL-259 (UHF), Length: 1 $42. The upper 1/2-wave section has only a single active insulated wire so a velocity factor of 90% was used, but the 85% factor was used in calculating the length of the 1/4 wave stub. PBR PORTABLES; 26-28 MHz * Length: 78cm * S. An Antenna with conical shaped sleeve operating between the frequency range 446-732 MHz was demonstrated by Zhang et al. 3422 8599 Prairie Trail Drive Unit A-400 Englewood, CO 80112. See Details on eBay available at. The ultra-wideband design permits 25 to 3000 MHz receiving and 50-1200 MHz …. Integrated Dual RF Transmitter, Receiver, and Observation Rec…. Dipolantenne :: dipole antenna :: ITWissen. On the bottom are two vertically polarized “cheap yagis”, one for 222 MHz and one for 446 MHz. We have several of your units, which have been 'crystalled' to different frequencies at your factory, obviously. The new Thunderpole Galaxy 5/8 is the latest generation of high performance base antennas. Coax collinear Antenna dimension calculator Back to Antenna calculator X-30 N 2M 70CM dual band collinear antenna aerial pmr 446 …. The D130J Super Discone Antenna is an ultra-wideband antenna covering. The Antenna Farm : VHF, UHF, 700, 800 & 900 MHz Amplifiers. php 12657 Bytes 10-11-2020 08:43:04 Yagi Uda Antenna Calculator. Our Top 10 Best 6 Meter Vertical Antenna On The Market – Reso…. Since this is a budget antenna, the it will be of non-conductive plastic. The CDQ3000 is super compact at only 515mm long and is based on our hugely successful CDQ5000 antenna and designed to the same revolutionary performance. This is a World Wide Web front end for a public domain program written by W4/VP9KF using PHP. Diamond az 510 n 144/430mhz 2m/70cm dual band. Tri-Band 50/146/446MHz Base Antenna. with a low angle of 25 Deg of RF. This antenna has all parasitic elements made from 1/4 inch aluminum rod with a drivne loop 1/2'' thick with 3/8'' loop ends. Antenna Length Chart in Feet and Meters. 403-470 MHz Vertical antennas A5 UHF: Please visit our partner in EU Internet shop www. antenna should be re-optimized for further analysis. 8dBi 8' N CONNECTOR *OS* GP-95 MULTI BAND VHF/UHF BASE ANTENNA …. Comet SBB-14 Antenna - PL-259 connector. Whip Length Trim the end of the color cap and slide the remaining sleeve over the whip - OR - Glue color cap onto the end *Cut end of cap off and slide over whip Frequency. So perhaps a review of the antenna can put a few things into the right perspective. To use the calculator, enter the desired operating frequency in megahertz to get a starting length in both feet and meters for building a quarter-wave vertical antenna. Ham Radio Equipment This aerial covers the 20, 17, 15, 12 and 10 metre bands and is made from a single 3 metre length of. The radio signal is transmitted directionally, using 6 element Yagi-Uda antenna with boom length …. Sweep the antenna from 440 MHz to 450MHz –the SWR should be between 1. by Dragonfly » 11 Nov 2013, 12:33. Directional Yagi antenna PMR - 446 MHZ. Where: L - the length of the total dipole antenna in feet (ft); l - the length of the arm of the dipole antenna in feet (ft); and. Sirio Vector 4000 CB & 10m Base station antenna Omnidirectional Tunable by whip length adjustment High power 1kw handling capability Made of aluminium alloy 6063 T-832 UP-GRADE: Lower radiation angle for the best DX, new tuning possibility Electrical Data Type: 3/4 wave coaxial J-pole Frequency range: tunable from 27 to 28. Multiband antenna combining the cellular/mobile GSM (2G), UMTS (3G), …. 6-port sector antenna, 2x 617-806 and 4x 1695–2360 MHz, 65° HPBW, 3x RET, 600 MHz-Ready Antenna Technology. Incredibly flexible Dual Band Display. View ECE446 Problem Set #4 Wire Antennas. Our new mini HF Mono Band QRP transceiver to any one amateur band from 1 to 30 MHz. 75 feet long horizontal length X 16 feet (1/4 wavelength) = 540 SQ feet. It is necessary to use an external antenna tuned to the lower part of the six meter band for this feature. GB1, small and compact, has a metal chassis guaranteeing sturdiness and durability. Comet GP-1 - Dual Band 146/446 MHz Ham Radio Base Repeater Antenna This is a very compact 2M/440 base antenna. 440 Mhz J-Pole Antenna plans - Here is a 70cm (440 Mhz) Comet GP-1 - Dual Band 146/446 MHz Ham Radio Base Repeater Antenna This is a very compact 2M/440 base antenna…. Authentic Genuine Nagoya NA 42. Silver plated and with a tiltable whip. ==> 4:1 coaxial balun, half wave at 50. The VHF 136-174MHz SMA Female Connector Black Antenna …. Frequency Rod Length Mhz w/o Spring 490 13” 495 12-1/2” 500 11-7/8” 505 11-1/4” 510 10-3/4” B4905C 490 512 10-3/16” 9-1/4” CUTTING CHART FOR LOAD COIL ANTENNAS 1) Locate the proper cutting chart for your antenna on one of the charts listed on this chart. Buy Commercial & PMR Radio Antennas and get the best deals at the lowest prices on eBay! Thunderpole Dipole Antenna 66-500 MHz FM Broadcast, PMR 446 2m 4m 70cm Airband. Destructive ‘collisions’ of waves are avoided when the direct and the reflected waves are synchronized. net Plots for 150 MHz, 300 MHz and 570 MHz are shown. 49 results ; DIAMOND X-30 p 2M 70CM DUAL BAND 446 PMR AMATEUR BASE ANTENNA universal · £52. base de COMET bibanda GP3M antenne 144-430 Mhz. available tri band antennas which retail in the $150 range. Most 440 users operate off of hand helds, or perhaps a mobile with a DC power supply. 450 430 432 434 436 438 440 442 444 446 448 450 Frequency (MHz…. ANTENNE YAGi446 mhz Fabriquer par mon ami 14BG005 Loic Dpt 85 MON PMR INTEK KT-980 HP QSO cannette de bière) fabrication yagi 446 mhz et midland GB1 J. Shop at Adorama for affordable microphones and accessories. Antennas (RX) Radio Scanner Accessories; 4m/6m ground plane antenna. 5 dBi, Max Power: 10 Watts, Length…. Max Pcwer Weight Connector length Assembling & Mounting: 146&1z/4. Single feed low profile omnidirectional antenna with slant 45° linear polarization. 5 inches OUTPUTS: Capacitance = -1. If you've experimented with 5/8 wave antennas before and know of a better formula for your QTH, feel free to change the formula to suit. 56 MHz RFID/NFC Antennas Antennas are available at Mouser Electronics. 4 MHz patch antenna were taken as Length L=30 mm and Width W=30 mm. One very important difference between this sunspot minima and all past ones is the avail-ability of inexpensive, easy-to-use and pow-. FDC150 Overall Length : 5' 7" Rated Wind Velocity (MPH) 135 MPH Mount Hdw. On most of the J Pole designs out there, a choke should be used as close to the feedpoint of the antenna …. The voltage difference is only 0. This is for a 432 MHz omnidirectional antenna …. 9250 Band 40 Meters 30Meters Mark Frequency kHz Space Frequency kHz kHz Standard Repeater Offsets. These antennas do not include the mount or coax. You won't have a 10' long antenna …. • Good performance • 5- 6 ft or so in length and radial free for durability. Antenna Type: Radio; Brand: BTECH; It is a Dual Band 146/446 MHz mobile spring antenna that has an 18″ N(F) to SO239(M) with a three-year warranty. The Moonraker AMPRO-80 is an HF mobile antenna for the 80M band. 336 MHz County Hunters when ever 20 is open and mobiles are around. 5 : Antenna The included flexible antenna measures 7" in length is quite adequate, and is terminated with a standard SMA-F connector. It calculates approximate received power. 11 Standards, Facts & Channels. 7 m, for this reason it is not suitable for rough terrain or forests. There is the AUDIO VOX built in this transceiver so NO PTT switching is necessary. So if the current length is 184 inches and the current freq is 46 MHz and your destination frequency is 52. Cut the dipole wire to be a little longer than the computed length. This antenna is pretuned, but an Allen wrench for adjusting is included. A slim jim for 2m (145MHz) will be 1. org Velocity Factor = FACT: RF slows down when traveling within coaxial cable. The 2 meter test results shows the antenna to be resonant close to 160 MHz. allocation from ~476 to ~478 MHz, similar to the HF Citizen Band. My original version of Hiking 2m J-Pole uses a simple bent pipe phasing stub 1/2 wave in total length or about 1/4 wave “stub” length. Using the formula to calculate dipole length (468/frequency in MHz), the total length of the dipole would be about 64. For the full length of the antenna enter the following formula into a calculator. Comet Antenna Model Gp9 144 446 Mhz Click On The Image For. Compact Design – Surprising Performance Specifications: Extended Receive Ranges… 118 to 160 MHz 250 to 290 MHz 360 to 390 MHz 420 to 470 MHz 820 to 960 MHz 1260 to 1300 MHz Gain & Wave: 0 dBi / 1/4 wave Max Power: 10 Watts Length…. I just installed a new TRAM UHF base antenna 400-500 MHZ 5 db gain 200 watts Ham/GMRS on the house, connected to a Midland MXT400 on a battery power supply. VHF/UHF Dual-Band | Comet Antenna Whereas Diamond lists the gain for their X300A also as 6. Continue Shopping: Tell a Friend: Related Products: K-PO SG7900 Dual Band Antenna £39. Too many variables to give you an honest answer. In one embodiment, the conventional whip antennas used for comparison were mounted near the center of the trunk lid. Ground Plane Antenna for 146 & 446MHz Thank you for purchasing our 146 & 446 MHz Gain : 146MHz / 6. the base housing 440 includes a parallel region 445 and a cutting retraction region. Ground-plane W3EDP Endfed Halfwave Single Band Dipole Random Length Endfed Doublet Linked Dipole Magnetic Loop Multiband Loaded Dipole Other The order the antennas were listed in was randomised so. They vary in length from 114cm for the 6m version up to 163cm for the 80m version PMR 446. Put a SWR meter at the antenna between the small pig tail coming off the antenna and the feed line. In the new model a = 1 mm instead of 10 mm. Ad I have for sale 4 Motorola 446 MHz…. Folded unipole with skirt wires connected at a midpoint on the tower. Build the Slim JIM Antenna A Unique VHF Antenna with gain over a J-Pole Jose I. MP Antenna 08-ANT-0863 25-1300 MHz RX & 144, 220 & 440 Bands TX Scanner Base. 49: Cut the elements to length as specified in the dimensions table, above. Comet CX-333 Tri Band 146/220/446 MHz Fiberglass Amateur Ham Radio Base Antenna. Common radio frequency bands include the following: AM radio - 535 kilohertz to 1. 1 - 200 MHz (the full range of the 3577A Network Analyzer). DIY Wire Antenna Calculator; great circle calculator; HF Trap Calculator; IARU Lat Long Converter; Morse code tutor; Air Cored Inductor Calculator; Support; Groundplane Calculator; Groundplane Calculator…. Tri-Band Mobile Antenna, black anodized, 52MHz 0dBi 1/4 wave 46MHz 3. UHF antennas come pre-tuned, with no user adjustment (or 'SWRing. Â Mounted a so-239 to a split piece of copper tubing, that took the place of the #14 copper wire. RF Solutions WHIP ANTENNA 90DEG HINGED 433 MHZ SMA(M) ANT-4WHIP3H-SMA. Download HF Dipole calculator 1/2 wave wire dipole antenna. 5-162A SMA 16CM UHF 440~470 Mhz antenna TH-446 , TH-F5 , TH-F7 , TH-F8 , THUV3R , THUV8R. Vertically polarized Omni directional. This antenna can handle up to 100 watts. Beam Antenna Maximum Boom Diameter: 1. SRL-217C High band antenna information 138-174 MHz antenna assembly sheet donated by Carl Beaudry VA2CMB. Ultra flexible slim whip antenna - Non Hinged. VHF 136-174MHz Antenna SMA Female for Motorola HT1000 XTS1500 XTS2500 XTS3000 XTS5000 MT2000 MTX8000 Walkie Talkie Radio Specification: 1. Base and mobile antenna cutting chart from Larsen Antennas. I am using the Diamond X50C2 for GMRS now. US7 In the band 420-450 MHz and within the following areas, the peak envelope power output of a transmitter employed in the amateur service shall not exceed 50 watts, unless expressly authorized by the FCC after mutual agreement, on a case-by-case basis, between. 5:1 or less Max Power: 200 watts SSB/100W FM Length: 5′ 11″. Roof Mount SiriusXM Satellite Radio Antenna…. If it is tuned at higher frequency, increase whip’s length …. 5MHz 220-225MHz 440-450MHz Max Power: 120 watts Length…. Effective 4-inch circumference loop, length …. Base Antenna; Mobile Antenna; Mobile Radio; Mount Accessories; Power SWR Meters; Programming Cables and Software; Replacement Parts; (Size: 446. ID174 DESCRIPTION 1/4 λ Ground Plane antenna for base station service working on 27-45 MHz …. 146/446 MHz Mini Dual-Band Mobile Antenna w/ Mini Magnet Mount & Cable RG-58/U Length Approx. Mouser offers inventory, pricing, & datasheets for ABRACON AEAC Series Antennas. New Starduster M400 Base Station CB Ham 10 Meter Antenna M-400 18' 1000 watt 7dB. VHF Antenna & Mount Combos. This causes an increment in return loss bandwidth of DGS incorporated antenna as compared with an antenna without DGS [14, 15]. waveguide WX-77D • Changed the rotation of the antenna and measured the transmission (S21) and reflection (S11, S22) characteristics using the network analyzer. 2-m antenna, I shall sample 2 through 30 MHz as a preliminary operating range. 446) reflect better off objects, so they can bounce into buildings or down streets better. 43) - TURBO-5000 PL - High Power CB and 10 M Mobile Antenna with UHF Male (PL-259) Fitting, Tunable, SS Whip, 77in Tall, Gray, 1500 Watt Max, Base Loaded, 27-30MHz. 0 db above sum; sum azimuth bw 11. It appears to be properly vented an pulls the warm air from inside the radio, not just the heat sink. 1 MHz element (diam 6mm) length …. CableFree High Performance Licensed Microwave Radios offer up to 440 Mbps and 880 Mbps Full Duplex payload (1. Very wide bandwidth, determined by the length …. 250 inches maximum Overall Height: Freq. This unit offers the extended length, two stud mounting found on the KA60 960 to 1220 MHz 1030 to 1090 MHz: VSWR: 1. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable ‘roll up’ antenna…. With this, I have been able to get comparative readings which have helped me repair a broken stub antenna. Weatherproof entire area above and between conduit and bracket with caulking compound or. The height of the mounting location improves the antennas range, but also makes it. The following notes show the design and construction of a Broadband HF Vertical antenna which does not require a tuner, and which is capable of providing moderate performance on all bands from 7MHz to 28MHz (reduced performance from 3. • Single feed line for VHF/UHF/220MHz operation. The operated frequency bands are at 0. Sirio Gain Master Antenna Review. Comet Antenna Model Gp9 144 446 Mhz …. Steps to Success • Adjust 6-inch all-thread for lowest SWR on 446 MHz. The result shows that antenna has a bandwidth between 419. Free shipping Free shipping Free shipping. COMET 146/446 MHz Mini Dual-Band Mobile Antenna w/ Mini Magnet Mount & Cable RG-58/U Length Approx. Price Comparison For Collinear Antenna at 365dealnet. Diamond F718 430MHz(70cm) 430MHz BASE STATION ANTENNA Length:4. denotes the length of the feeding pad. 300 MHz: CW, RTTY/Data–Maximum power 200 watts PEP – 28. Question: Calculate the dipole radio antenna length, dipole leg length and wavelength if the antenna frequency is 15 MHz. This article will help you choose the right ham radio base station antenna with more ease. DBJ-1 - was developed because folks ask whether there was a simple way to convert a 2 meter J-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. Sirio Tornado Base Antenna 50. Model # 305-486 UNSPSC # 43221720 …. Actual throughput will depend upon various factors such as the manufacturer and model, environmental factors, whether 20 MHz or 40 MHz …. Antenna length based on the following formulars: 1/2 λ dipole (feet)= 468 / frequency in Mhz. For demonstration purposes, a microstrip 5 × 1 series-fed patch antenna array was designed with five patch elements separated by transmission line sections of approximate length …. The 160mm dipole elements can be made from metal rods or just stiff wire (If supported on a wood, …. Carefully insert the coax assembly into a length 1/2" PVC pipe for final mounting. Bingfu Mobile Ham Radio Antenna Dual Band VHF UHF 136-174MHz 400-520MHz Amateur Radio Antenna. We have taken into consideration the Comet Original GP-1 146/446 MHz Dual Band Heavy-Duty Fiberglass 1. The 3 parameters of a rhombic antenna are: l : antenna leg length, g: one half of the large interior angle, h : antenna height, Waveguides doc file: Zagi antenna Zagi antenna, pdf file: Horizontaal: Antenna types: Whip antenna-Vertical antennas: 1/4 wave Ground Plane 1/4 wave Ground Plane 446 MHz: 5/8 l UHF antenna 5/8 Lambda VHF/UHF Antenna. load: 120 W PEP; Bandwidth: 600 kHz. 5 MHz the new length (in inches) is therefore 184*(46/52. The usual frequency on 75 meters is 3. 75" long and includes hardware for pole mounting. When the length of the antenna is 1/4 of the wavelength, the transmission and reception conversion efficiency of the antenna is the highest. Have a question? Find answers in product info, Q&As, reviews There was a problem completing your request. It is approximately 10 feet tall, which makes it too large and heavy for most field setups. Co-phasing or “stacking” has long been a way to get high gain from antennas. Plus the antenna also have the great low. This program has been derived from a public domain BASIC program written by L. OTHER TAPER SCHEDULES ARE AVAILABLE IN THIS ANTENNA, CALL OR EMAIL FOR DETAILS. HRO Discount Price: 146/446 MHz Spring Mobile Antenna, Black, Gain: 2. DUAL-BAND MOBILE ANTENNAS Z780: Gain & Wave: VSWR: 146MHz 4. After a review of many antenna designs, I have settled on a 16 Element Collinear Broadside Array as the most cost effective and high gain system to deploy on the 74Mhz band. The FG4500 from Laird (formerly Antenex) is a heavy duty, omni-directional fiberglass UHF base station antenna. In radio engineering, an antenna or aerial is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver. The result is 3 db more than just a single antenna. Short UHF [400-470 MHz] Antenna handheld transceivers. The dark line indicates that the approximate length for a rod tuned to 460MHz is 5. 8 * for 50 ohm cable: Lb = La x 0. Mark Asmuth Kenneth Morgan Christopher Payne Outline Description History Theory of Operation Design / Optimization / Results Recent Developments Closing Remarks Background Directional antenna (beam antenna) Linear array of parallel dipole One reflector in rear (longer than feed) One driven element One of more directors in Tx / Rx direction Low Impedance and narrow BW. ARGOS Omnidirectional Antenna. 2 dBi 5 Feet 11 Inches Tall SO-239. 0 MHz 432MHz Band Licence Conditions. Just screw it on the portable Baofeng radio and it needs to work without any special need to ground it or to use coax. Comet SBB-224NMO - NMO Tri-Band 146/220/446 MHz Mobile Antenna. 868 MHz Antenna Mounting YAGI Working Frequency 868 MHz Technology ISM/LoRa/SigFox Directivity Directional other cable length options on request 2) for other connector options see page 42- 45. An almost perfect 1:1 SWR was achieved at 446 MHz after installation. Coverage: 2M/70cm (144 & 446 MHZ…. If you are using a higher frequency or would like to do some additional tuning, you can reference these cut charts. A Slim Jim for 2m (145MHz) will be 1. To cover the upper hemispace, the values of the elevation and azimuth angle are limited to [0°-90°] and [0°-360°], respectively, with steps of 2°. 100 MHz Antennas are available at Mouser Electronics. 5:1 or less Max Power: 100 watts Length…. Comet Single Band Base Station Antenna: Part Number: 4 Element 6M Beam Wide Band 50-54MHz, Gain: 10. 99 MHz, Boom Length: 27', Longest Element: 21'3", Turning $1,079. 135…175 MHz Réglable / 2×5/8 λ / 3. This makes them more suitable for mobile use than the fibreglass HF whip antennas above. Jun 12, 2020 · Select security. Dedicated handheld rubber duck style antenna for optimum reception of the civil/military aircraft bands, covers 108-140 and 220-400MHz. Vehicle is always parked in the garage. Soyez le premier en 446 MHz …. Please leave messages relating to 220 Mhz …. DOUBLE Bazooka Antenna 27 Mhz CB DXer DOUBLE BAZOOKA antenna is an extremely broad banded Half Wave Antenna which can operate efficiently. This formula takes into consideration the capacitive "end-effect" from insulators which shortens the physical length requirement for the equivalent electrical length. Solder the wire into the pin, stick it into the connector, and flood the connector body with hot glue. Frequency: DC-500MHz; 146/446/1200MHz HT Antenna. The ATK-5 is a good „backpacker” antenna: its length is only half meter (1 ½ ft), . The CW operating frequencies of the CW net can be found at 14. Now, I am assuming, that the SAME whip antenna made made to be a FULL wavelength at the same frequency Antenna feed The λ/2-length antenna shown in Figure 2 is called a dipole antenna. Less this amount for inverted V 446. In addition to the new bands, the gain in the 1700MHz. PDF © Rohde & Schwarz; R&S®M3SR HS9043 VHF/UHF Cavity Antenna. ABRACON AEAC Series Antennas are available at Mouser Electronics. : I Chose 440 band because the lengths are small. Europe has PMR on 446 MHz and the USA Family Radio Service on 462/467 MHz. 8 dBi: 5⁄8-Wave; 446 MHz (70cm) VSWR: 1. (see ARRL Antenna Handbook under collinear arrays for graph). #6 x 32 x 1" stainless screws and nuts (2 screws and 4 nuts) 5. GP-1 146/446 MHz Dual-Band Heavy-Duty Fiberglass Vertical Base Antenna. 5/8 Wave The 5/8 wave antenna is a single radiating ele-ment 5/8 wavelength long. I want to build this antenna for 220 Mhz. 5 MHZ MOBILE Tri-Band 146/446/1200MHz Gain & Wave 2m/70cm/23cm 6/8. We have many other scanner antennas in stock that are not listed here - please ask. Radio-Frequency Antennas Based on Wavy Ag Nanowire Networks Contour length (L c) and end-to-end length (L 0) of individual nanowires. Tri-Band Mobile Antenna, black anodized 50/146/446MHz Gain & Wave: 52MHz 0dBi 1⁄4 wave 146MHz 3. 5/F=L will give you the spread on the coil (length of the coil itself) The antenna elements and coils are made from #12 solid copper wire. The length of the antenna will vary depending on how much efficiency/gain you want. A very basic program for calculating the length of each leg of a 1/2 wave wire dipole antenna. antenna offers much improved bandwidth of 51. Comet SBB2 Dual Band Antenna: 146/446 MHz Review. 38 kB PDF file: SRL-229 High band antenna information: Epoxy. Autocostruzione di una J-Pole per i 446 Mhz. Wavelength and Antenna Length •You might have noticed that the AM radio antenna in your car is not 300 feet 446. Resist damage from brushes w/tree branches, garage doors, etc. 287 In the maritime mobile service, the frequencies 457. Sirio Antenna Sirio Tornado 50-60 Mhz Omni-Directional 6M Vertical Base Station Antenna. The size of the structure is 51 × 82 mm2, and the area left of the antenna …. 00 Mail In Rebate Until 09/30/21. PMR446 Wavelength and characteristics. If you trim it it will only alter the 144 wave length as that will be much longer than the 446 frequency which is only around six and a quarter inches. Shorter antennas offer more portability and convenience, while longer antennas generally perform better. The steps of the proposed antenna design are For design requency of 750 MHz, the design wavelength o shown below: is 0. Mechatronic wrench leaflet. L is the length of the total dipole antenna in ft. Your Trusted Two Way Radio Source. Several antennas can look similar or have had the same name over the years. Der Frequenzbereich für den UKW-Rundfunk liegt zwischen 87,5 MHz und 108 MHz, das bedeutet, dass der Runddipol, abgestimmt auf die mittlere Wellenlänge von 100 MHz einen Durchmesser von etwa 50 cm dipole antenna…. Smart satin black finish, and comes with BNC type base fitting. This monopole antenna utilizes the. Most VHF FM repeaters are using 145 MHz to 146. Colour: Black DELOCK 12539 TETRA 430 - 470 MHz Antenna MHF plug 0 dBi 1. Antenna length is based on the following formulas: 1/2 wave dipole (feet) = 468 / frequency in Mhz. BASE ANTENNA 135…175 MHz Réglable / 2×5/8 λ / 3. Our new portable Dipole antenna set with mounting kit. Best communication quality in the 430-450 MHz band Gain:11DBi connector:SO239（SL16-K） length :69. for 435 MHz for handheld use Elevation Plots. Transmission lines then guide these to the receiver front end. I made one for 4m (70MHz) which is 3 metres long! The quarter wave matching section can be made horizontal, with the half wave radiator section vertical, 90° to it if space is an issue. The gain with no ground plane is unity. Put in Your Junk Box 440 MHz ¼ Wave Building a Dual-Band Antenna Mentorfest 10/23/04 12. Since I like to tinker and build things I thought building an antenna would be a good idea. LMR-net - (LMR/DMR) 140-512 MHz. Delivered with: Telescopic and multi-band antenna 7-430 MHz Diamond Antenna RHM10 for mobile. 1005 ÷ freq (mHz) = Length (feet). 50MHz antennas plans, homemade antennas for the six meters category is a curation of 184 web resources on , Comparison of Commercial 6m Antennas, The M2 6M7JHV Antenna, 50 MHz Coax Dipole. This item UHV-4 Comet 29/50/144/440 MHz Multi-Band Mobile Antenna, Tunable on 10 and 6 Meters, Chrome, Gain: 146/446 MHz. 5dBi over standard discone,Length: 185 cm,Mast: Upto 50mm,Radials: 8 X 90cm 8 X 30 cm,Connection. 5:1 or less Max Power: 60 watts Length…. We also used the simple wavelength formula:. The dimensions of second model of the semi–meshed antenna were reduced to get resonance on 446. Features: • Base station antenna, Mono-band • Low-gain, Omnidirectional • TORNADO 36-42, 42-50 and 50-60 tunable by whip lenght adjust • Made …. 5 metres long, and 70cm (433MHz) will be 0. A basic SWR meter at an affordable price. Right Angle Retractable BNC Antenna £14. (30-300 MHz) TV antenna pointing due West. The proposed antenna consists of an improved inverted-trapezoidal CPW-fed patch, and a series of monopole strips with different length. Based on the Antenna Handbook it should have about 12 db gain. 25 kHz, with an output power of up to 0. • 222 MHz antenna – recommended stacking distance is 6 feet. 1) Build the antenna by using the design data here below. "The capture area of an antenna is determined by multiplying the antenna's radiator length by 1/4 wavelength. Alternative antennas to an OEM version will be recommended, where required. World's Best RW X30 Dual Band Fiberglass Ham Radio Base Antenna 144/444 Mhz…. Tunable by whip length adjusting. Frequency Range - 50-60Mhz Tunable. The third frequency band FB3 may be from 5925 MHz to 7125 MHz. This is a true unbalanced antenna…. 35 meters, giving it high wind stability along with excellent performance. 584 MHz and use an 8 m long 'L' antenna to give 1. On 2M, in order to get 3dBd of gain, the antenna has to be 8-10' in length. I hear quite a lot on 446 despite being in a bit of a radio dead spot. PMR-446: Amateur Radios: Professional Radios: Cases: Radio Accessories: Marine: Scanners: Speakers: Antenna type: HF loading 1/4 wave / 50 MHz 1/4 wave / 146 MHz 1/2 wave / 430 Mhz 5/8 wave; Length…. Broadband and rugged antenna designed for DME or transponder use. Megahertz to kilohertz formula. Diamond ® Antennas are sold through authorized dealers. Center Conductor: Stranded Tinned Copper. 965’s UHF / PMR 446 Bazooka Antenna By simonthewizard April 19, 61 meters and the total length of the antenna is 5. Example Antenna #1: 146/446 MHz Dual Band Mobile Antenna. Antenna feed The λ/2-length antenna shown in Figure 2 is called a dipole antenna. Video showing my PMR 446 Homebrew Antenna. 0dBi 5/8 wave x 5 VSWR: Less than 1. COMET GP-9 Dual Band 2m/70cm Base Antenna w/ UHF Connector 17ft Tall Length: 9'8" Weight. Check out these recommendations. Fits to all GPS combination antennas and light duty magnetic bases. 40m-10m DELTA LOOP ANTENNA - GU3WHN The variety of one wave length loop shapes that can be deployed to suit the QTH. 2) The charts list the rod length in inches. J POLE ANTENNA: antenna j pole vhf. Part Number: 89865-05m R12i, R12, or R10 Radio Antenna Cable - NMO to SMA Radio Antenna Cable 5m (for 450 MHz antenna) 2020's in our Hindsight - now we can see clearly! 20% off all screen protectors. Click Here For ADVANCED SEARCH 146/446 MHz Spring Mobile Antenna, Black, Gain: 2. Inagaki, CWRF 2016, Grenoble, France June 21, 2016 21 Loop antenna input WX-77D output Port-2 Coax. cannette de bière) fabrication yagi 446 mhz et midland GB1 J. The original goal was to have an antenna that I could use for 2 meter SSB. / WLAN: Bosch Truck Radio: RF Systems: Package Deals: CB Radios / 10 Meter Radios: POC Radios: DMR Radios: Digital PMR-446. 144-174 MHz, 200 Watts, 3 dB Ga 5/8 Wave Antenna, Chrome Talley Inc. Contact Taiwan GPS supplier-CHIH I ANTENNA CO. A 17 element for 420MHz to 460MHz including PMR446 Yagi with rear mounting and N-type connector. Item Antenna; Antenna Length 32 3/4 ft; Color Gray; Frequency Range 26 to 30 MHz; Power Rating 000 W, 20; Mounting Style Bracket; Overall Length 48 in . I just installed a new TRAM UHF base antenna 400-500 MHZ 5 db gain 200 watts Ham/GMRS on the house, and even on Ham band good luck finding anybody on 446. Since I try to work AO-27, UO-14, and SO-41, I had to compromise on the center. Dimensions (diameter × length) 148 mm × 446 mm (5. 02036070205 Via Liguria 15, 46049 Volta Mantovana (MN) ITALY Tel. PMR 446 Analoge portofoons; PMR 446 Digitale portofoons; PMR UHF Analoge portofoons; PMR UHF Digitale portofoons; Discone Antenne 25-1300 MHz PL-uitvoering. Moreover, as the number of iterations of the fractal increases, the total effective electrical length. Best CB Base Antennas: The most popular antenna models are center-loaded, Comet Original GP-1 146/446 MHz Dual Band Heavy-Duty Fiberglass Vertical Base Antenna - 4' 2", then you need to know that the Diamond base station Antenna 144S5 has a length …. 26-33 Mhz 5/8 Wave Vertical Antenna with Ground Plane - 1200 watt power handling capability. Eightwood 4G LTE Antenna 3dBi SMA Adapter Glass Mount 3m RG174 Cable + SMA Female to BNC Male Adapter (824-960 MHz), DCS 1800 (1710-1880 MHz), WIFI / BLUETOOTH (2. IndiaMART > Antennas, Wifi & Communication Tower > Antenna 136-174mhz/350-390mhz/446 mhz/800 mhz. PMR 446 Analoge portofoons; PMR 446 Digitale portofoons; PMR UHF Analoge portofoons; PMR UHF Digitale portofoons; PMR VHF Analoge portofoons; Antenne 21 MHz Length:1. Use high quality coaxial cabling between the antenna and radio, RG-213 will suffice for UHF. An Antenna with conical shaped sleeve operating between the frequency range 446-732 MHz was loads reduced the length of the antenna by 51. Radiation ( H-Plane) 360 degrees Omnidirectional. - Leading supplier of wireless communications …. Station Equipment •You will need a transceiver that works on SSB and CW on Boom lengths …. POWER HANDLING CAPABILITY: IT WILL STAND UP TO 800 WATTS AT HF IN A MATCHED SYSTEM, WHICH IS 1:1 SWR Antenna Materials (126) Antenna Wire (28) Antenna Kits & Components (14) Assembled Baluns (12). COMET 146/446 MHz Dual-Band Mobile Antenna, Black, Gain: 3. The band is allocated to the Amateur Service with Secondary status and includes additional restrictions in parts of the band. 99/Unit) 89 mhz BODY MOUNT ANTENNA & HINGED WHIP MOTOR SPORT MSA PMR BNC. Comet Original B-10NMO 146/446 MHz Mini Dual-Band Mobile Antenna 12" NMO Buy on Amazon: 10: Wilson Electronics 13. 56 MHz RFID/NFC Antennas Antennas. Today I'm going to show you how to make a 1/4 wavelength antenna for the 70cm amateur radio band. 10 Best 10 Ham Radio Base Station Antenna Of 2022 of 2022. Type: Radioworld HF Discone Antenna, Frequency: 0. The materials required: approx 300mm 2. DIY Wire Antenna Calculator; great circle calculator; HF Trap Calculator; IARU Lat Long Converter; Morse code tutor; Air Cored Inductor Calculator; Support; Groundplane Calculator; Groundplane Calculator. What are the dimensions for 1/4 wave antennas for Shure wireless High End Frequency - MHz Quarter Wave Antenna Length - Inches. This antenna sported a 19' 10" length radiator with 3 102" radials, as well as 3 small 8 inch "radials" at the top of the antenna to reduce static build-up. Return losses should be less than -. Frequency in MHz: Length of each element:--Total length …. 164M for UHF antenna, the result of the antennas length calculation is shown in Fig. 78 sold ; PMR Antenna PMR446 dPMR 446 MHz 70cm Low SWR . Add Shielding Gamma Emission and Exposure Rate. mhz) 2900 navigation page 12 3000 mhz) 3100 core uhf tv band channels 14-51 excluding ch. This link is listed in our web site directory since Wednesday Mar 25 2009, and till today "5/8 Wave Vertical Antenna Calculator…. Size: 145 (w) x 56 (h) x 60 (d) mm. The diagram below contains all the information you would need to build a 3-Element 11 Meter antenna. In most cases: the longer the antenna, the more capable it is of boosting weak frequencies and receiving difficult to hear stations. Features : Triband Base Station Antenna for 6M, 2M and 70cm Bands ( 52/146/446Mhz)!. Comet Original GP-1 146/446 MHz Dual Band Heavy-Duty Fiberglass Vertical Base Antenna, 4' 2", SO-239 Connector HYS YAGI Antenna High Gain 9dBi UHF 70cm Base Antenna UHF 400-470 MHz 5 Elements Antenna for Motorola Repeater Kenwood Baofeng 2-Way Radio. 2m Connector:M - Type: 1-4wave base loading. The cheapest one is the polish made Dipol ATK-5 which has 7. That is about 6 Mhz above the 70cm amateur radio band. SCCo ARES/RACES VHF/UHF Antenna Considerations. 29 GHz, compared to the simulation result. 2 - 4 GHz; 20 dBi Gain; PARTNER: SCHWARZBECK MESS-ELEKTRONIK; MARKETS: RF,. The front stack, was used primarily for in. - Is it Tram 1450? What manual says about adjusting length of the radiators? - Is your meter appropriate for the 460MHz? Do. Sometimes the laptop keyboard gets locked too. Rod Length (inches) MUF4505(S) Frequency (MHz) 430 432 434 436 438 440 442 444 446 448 450 5. Feed triangular loops either at a corner or in the case of apex-down loop, at the apex. UHF - This covers 400 - 470 MHz at 2:1 VSWR at the band edges. As a result, changes on gains, S 11 parameter, and bandwidths were observed. Ask for minimum quantity order. Connector Options (customer specified) 446-75 UHF Antenna Frequency Range: 406-512 MHz…. The picture above is of my 440 MHz stacked quads. There are 3 limitations though: - The possibility to use the antenna like portable UHF antenna. Adjusting the length of the dipole can put the Return Loss at its minimum, which means that most of the power should be radiated. With the telescopic elements a total length range is 173 mm to 520 mm. 0833 meters, Antenna Length (%) = 365. Comet SBB2 Dual Band Antenna: 146/446 MHz Review Comet SBB2 Dual Band Antenna: 146/446 MHz Review. In their experiment they set up both circular and linear antenna arrays for the KerberosSDR, then flew the drone in front of the antenna array while recording the bearings calculated by. 49” at 144 MHz to 18” at 440 MHz. The theoretical element length is (300/F MHz /2), Antenna is a tuned length dipole antenna using Kevlar cored radi-ating wire, fitted with frequency la-bels to indicate tuned lengths. 300 MHz then your antenna is long, so move the shorting bar toward the coax connection to shorten the antenna. LO frequency (f LO) = 1800 MHz…. A ready-made set of input data for a …. Optimum length designed for higher gain to maximize range This rugged capless design provides maximum flexibility Also provides built-in GPS capability. CO LINEAR ANTENNA DESIGN While it is not possible to home-brew a commercial quality antenna, frequency of 444 MHz. Frequency Rod Length Mhz w/o Spring 490 13" 495 12-1/2" 500 11-7/8" 505 11-1/4" 510 10-3/4" B4905C 490-512 5dB 5/8 Over 5/8 Wave 512 10-3/16" 9-1/4" CUTTING CHART FOR LOAD COIL ANTENNAS 1) Locate the proper cutting chart for your antenna on one of the charts listed on this chart. 7267 MHz MegaHertz (MHz) 10^6 Hz and does not vary over time. Polarisation : Linear Vertical. Interleaved dipole technology providing for attractive, low wind load mechanical package. Results The finished antenna system is cut to resonate at 50. ): 495 mm -Mounting mast: Ø 35-54 mm : Talky Walky PMR 446 Amateur Radio Talky Walky Professional Talky Walky UHF VHF DUALBAND Antennas CB 27 Mhz. 00 Repeater inputs and outputs. Thunderpole Antenna a dipolo 66-500 Mhz FM broadcast, PMR 446 2m 4m 70cm AIRBAND. Adjustable sliding tube at the base. Pulse Molex Laird Connectivity Maxtena ABRACON Advantech Laird Connectivity Maxtena Molex Phoenix Contact Pulse Radiall Siretta TE Connectivity Walsin. 00 Length: 30" at 450 MHz: Radiator: Closed coil phasing. All of this depends on the antenna wavelength at the frequency you are listening too. Coil Antenna Cutting Chart 111703. 1 quarter wavelength is the shortest antenna length that will radiate signal. Features : Comet GP-15 Tri Band 52/146/446 MHz Vertical Base Antenna. I want to make my own antenna for 446mhz. 405 Chapter 9: Radiation and Antennas Lesson #61 Chapter — Section: 9-1 Topics: Retarded potential, short dipole Highlights: • • Radiation by short dipole Far-field distance Special Illustrations: • Exercise 9. Maco Antenna Specifications. Yagi Antena : 초단파 (VHF) ·극초단파 (UHF) 대에서 사용되는 지향성 (指向性) 안테나. From 2014 i'll be selling PMR446 slim jim antennas,if you want to buy one please email me first [email protected] Hold the lightbulb and touch the folded dipole, move from end point to middle. 5 meters, the 10% noise limitation is achievable between 0. We scoured online reviews for today’s top-rated Best 2M 70Cm Base Antenna. 82 MHz and measurement return loss of-20. For example, the 100 MHz antenna …. The Moxon rectangle is a 2-element parasitical beam or unidirectional antenna about 70% the length …. FOB Price: US $ 1-10 / Piece: Min. Antennas vary in design frequency, bandwidth, directionality, and polarization, and different applications demand different requirements in these properties. 37 - Multi-Band Portable Antenna. 165mm : at 146 MHz and then tune the 70-cm stub. The antenna calculator above uses this formula as a starting point to calculate wire lengths for the dipole. These are available with NMO base or SO-239 Base. Comet GP-1 - Dual Band 146/446 MHz Ham Radio Base Repeater Antenna GP1. Cutting table included) Bandwidth 6. Antennas: HF: HiGain 204BA 4 element 20m beam at 95 feet, wire antennas 160M-10M. Share kung paano ako gumawa 5/8 wave J-pole antenna for 145 MHz ANTENA MA-6000 The original Ed Fong Dual Band VHF/UHF 70cm/2m J-Pole PVC Pipe Antenna : Eye-On-Stuff2 meter / 70 cm telescopic dipole, (FM receiving) Folded Dipole How to design coaxial probe or SMA connector in HFSS The Magic of a 5/8th Antenna Length. Large Antenna, 5 Sections, 100cm + 2cm is resonant @ ~70 MHz Large Antenna…. 32 / frequency in Mhz: Cut wire slightly longer for connecting insulators and pruning. UHF 400-480 MHz by: John 'Miklor' April 2016. QUICK LINKS > Antenna Bases > Cables > Antennas. Television stations - 54 to 88 megahertz for channels 2 through 6. OSJ - Business Band, Marine Band & MURS 150-162 MHz. For More County Hunters Frequencies see -- COUNTY HUNTERS PSK31. The higher the frequency, the smaller at antenna. Length Width Height IP Rating Cable Type Qualification Series 0,446 …. Comet Original GP-3 Dual-Band 146/446 MHz HF Vertical Base Antenna. Home there are the specifics of this yagi antenna for PMR446 calculated for 446. S i got a contact 150 Miles away. 3 GHz grounding block ( RG-6 and a 3 GHz grounding block will ensure very low feedline losses) 7. OTHER TAPER SCHEDULES ARE AVAILABLE IN THIS ANTENNA, CALL OR EMAIL FOR DETAILS Our antennas are constructed with the best quality materials in order the best mechanical construction can be achieved, not the cheapest and most profitable!. the span length may usually not exceed 15 km. While you don’t have to pick an antenna whose length is exactly 4 times the wavelength of the signal, it’s a good idea to get as close as you possible can. SMA 16CM Frequency : 440~470Mhz; Center Frequency : 460Mhz; Max power : 10W; Impedance : 50 OHM; Length : 16CM; Conector : SMA (Male) Weight : N/A; PACKAGE CONTAIN Model No. Dipole length in meters: 143 / frequency . 5:1 or less Max Power: 200 Watts Length…. The antenna will have more gain in certain directions and less in others. 5:1 or less 60-Watts (FM) Length: 18-Inches Connector: UHF-Male (PL-259) Related products. 27 MHz 11m CB Bazooka Antenne …. Antenna length are VERY important to two-way radio range. The Centre radiator includes helical trapped wire encapsulated in fiberglass to receive all HF bands. This formula only applies for yagis of more than about 10 elements, boom length greater than about 2 wavelengths.