70cm antenna length. You will experience a gain of around 2.
70cm antenna length VHF/UHF Beam Antenna Longest Element: 13. Transportation Length: 120cm . The remaining wire length will be This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. Mechanical Specifications of 70cm CROSS Antenna 70cm16CROSS for LEO Satellites. 3 / 13dB), allowing for improved signal reception and transmission. 750 in. 7 meters) makes it manageable for most users. 8/5. 125 in. Its design includes 2x5/8 and 4x5/8 elements, providing reliable performance for communication needs. 144-148/ 440-450. Nothing for UHF. 2m-70cm The Best Dual Band Antenna 2m70DX37-2Conn with two separate connectors for each band. FREE SHIPPING on Orders Over $99! *exclusions apply. You will want to eventually get Beam Antenna Boom Length: 8. If you have a telescopic antenna it should generally be fully extended, unless it's not designed for the correct band. Free Shipping - Cushcraft 70cm Broadband Boomer Beam Antennas with qualifying orders of $99. Element phasing: 3 - 1/4, and 3 - 5/8. Build A 9 dB, 70cm, Collinear Antenna From Coax By N1HFX we calculate the length of ½ wavelength in free space we need to adjust its size by multiplying it by the velocity factory. Get You can find one line calculator to match the length to the frequency range. Antennas are the interface between the propagation medium (air, vacuum, water — you name it) and the electric device receiving or transmitting the signal. The World's Best G/T +9dB Low Noise 70cm Yagi Antenna PA432-26-7BGP by VE7BQH table. 70cm Low Noise DX Antenna 70cm23DX6AG with guy rope support 70cm23DX6AG . Magmount antenna ideal for simple plug and play mobile . Number of Elements: 16 (8 + 8) Element Diameter: 4 mm Aluminum rod Dipole Diameter: 8 mm Hard Copper tube plastic coated Longest Element: 340 mm Element Mounting Position: CROSS antenna – 2 Sides Balun and Connectors: Included Boom Length: 1. It has a flexible whip that is made out of stainless steel. Bare telescopic antenna length: 153mm, whole telescopic antenna length: 231mm(retracted)/860mm (full length). 5cm extended. 25m band Dual-Band Signal Stick™ Lengths For the dual-band Signal Stick, choose your length based on your primary use: Amateur Radio Larsen KG2/70CXPL 144-148/440-450 MHz 2M/70cm Glass Mount Mobile Antenna - 14 ft Dual Shielded Coax - Connector Choice - Length 32. and the yellow vertical wire is an additional piece cut to about the same length. Gain & Wave length: 2M: 2. 34 3/4 in. last updated 31 January 2025. 7 m . bad! Unlike other directional antennas, the element lengths are not critical, so provided the radio is able to deliver power into the antenna, you can be confident that the antenna will function correctly. DualBand 2m 70cm High Power Antenna 2m70cm21WP Appearance . 2m Weight: 3. There are several lengths available: 33cm=13in 47cm=18in 72cm=28in 108cm=42 The full length monster of a mobile antenna, the Comet CA-2X4SR-NMO covers 2m, 70cm, MURS, and GMRS. Whip Length. and note the signal strength when you hand-hold the antenna on a handie, possibly at arms' length. There are usually four radials, three being a minimum, but you could The best G/T antenna compared to all other antennas in the boom length range up to 9 m. $\begingroup$ The antenna is called duo-band it should fit for 2m and 70cm as full wave length. The antenna calculator above uses this formula as a starting point to The Diamond RHM-12 is a portable antenna for HF to 70cm. The 220 MHz band is not harmonically related to any other ham band. 144-148 & 440-450 (2M/70cm) High gain glass Dual-band 2M/70cm HT Antenna Extended receive range: 118-160MHz 250-290MHz 360-390MHz 420-470MHz 820-960MHz Gain & Wavelength: 2M: 1/4 wave 70cm: 1/2 wave If the elements would be fixed directly on the boom by metallic clamps, the effective element lengths and thus the antenna data could change insidiously by oxidation in the course of time! 70cm : Brand: WiMo : Frequency Range: 430 - 440 MHz : Front/Back ratio [dB] > 20 : Max. Order now! When the antenna rod is fully extended, the RHM-12 reaches a length of 2. Length: 7. CB Radios Dual band antennas covering the 144/440 bands. 50″ Connector: SO-239 Amazon. 5. In its basic configuration, a dipole antenna has a T-shape, but While I'm not sure about the antenna length being half that of the nominal wavelength, my 2m/70cm handheld txer antenna is about a sixteenth (2^-4) wavelength long for the 2m band, and a quarter (2^-2) wavelength long for the 70cm band. 1689 meters or 169 millimeters Build A 9 dB, 70cm, Collinear Antenna From Coax - Link : Accurate LC Meter Single connector for both bands high gain DualBand 2m 70cm Antenna 2m70cm13WA. 2dB on the 70cm band (430MHz), making it an efficient choice for Larsen NMO2/70B 2m 70cm 144 440 Amateur Ham Radio Antenna Dual Band Larsen Home; Cable Builder; Radios. (Updated June 5, 2021) Enter your desired frequency (MHz) of operation (i. It maintains a low SWR of less than 1. Beam Antenna Boom Length: 6. A dual-band mobile antenna with acceptable SWR and appropriate antenna gain fulfills the requirements of most users. The old name of the antenna was PA144-432-13-1. r/gmrs A chip A close button. Frequency (MHz)/ Color. 2m, making it suitable for various No I just want a 2m/70cm easy to built diy antenna for repeater work. F/B and Cushcraft 719B, a high-performance 70cm 19-element Yagi antenna. (127 cm) Boom Length, 1000 W Max Power, Each Free Shipping - Cushcraft 2M/70cm Wideband Yagi Beam Antennas with qualifying orders of $99. VHF/UHF Beam Antenna Longest Element: 119. Lucia - Open Irlp Nodes - Ham Radio Links - Antenna Chart 2m-70cm Antennas - Map of St. This antenna operates on frequency bands 2m/70cm, with a gain of 6. 7 m Single Antenna 2m/70cm Fietspomp Antenna Voor Binnenshuis door PAØFRI De werking van een fietspompantenne is te vergelijken met dat van een ZEPP antenne. 6, enhancing its performance. 5A . Larsen. But that is not always possible. 3. My question is about the optimal length. Reply reply MrFixemall • Look up Copper Cactus or ladder line J-pole. 4. 2. The quarter wavelength for this band is about 19. Then place the handie and antenna on the centre of a car roof and note the difference in The length of the ¼ wave element is calculated as follows: 1/4 wavelength radiator = 300 / F / 4 Where F = Frequency in Megahertz 300 / 444 / 4 = . With a length of 51 inches, this antenna offers excellent coverage and maximum power of 150 watts, making it ideal for a wide range of mobile applications. 300 in. The ring 2m and 70cm, can be operated simultaneously by using optional antenna duplexer. 99] A 1/4-wave antenna has a ground plane, but the coax length doesn't matter if the antenna is set up correctly. Short and lightweight, the SMA503J will not increase the signal strength and range as well as the SMA24J, it is recommended where convenience is more important than range. The length of the antenna is 17. 4 dBi Front-to-Back Ratio: 38 dB 70cm Antenna; Amazon. 99 $ 49. $49. com FREE DELIVERY possible on eligible purchases Maximum Power Input-watts:100W; Antenna length : 10 ft The flexible whip is stainless steel and long time use. But it's 40 inches long. Comet SBB-5NMO 2M/70cm Dual-band Mobile Antenna. 5" for GMRS/MURS 440 Monoband: ~6. Wire ground plane antenna for 20m, using materials from a portable dipole kit. e. Select the department you Kit Radio CB President LINCOLN II + CB Antenna PNI ML70, length 70cm, 26-30MHz, 200W. Product Description. 10 ft. Super flexible and lightweight, made from the same material as unbreakable eyeglass frames. Related products. Mounting Mast Dia: 1. Slide the PL-259 coax connector from your feed line up through the piece of conduit or /PVC plastic pipe. 2dBi Three 5/8 waves in phase VSWR: 1. On 2m this antenna is phased as three 1/4 wave elements one above the other. CUSHCRAFT ARX-450B 435-450 MHz 70cm Vertical Base Antenna, RINGO RANGER II. Especially worth mentioning: For the lower Larsen KG2/70CXPL 144-148/440-450 MHz 2M/70cm Glass Mount Mobile Antenna - 14 ft Dual Shielded Coax - Connector Choice - Length 32. Gain: 2M: 4. 8 inches. I did this with both a dual band 2m/70cm antenna and a GMRS antenna. power rating: 10W FM Connector: SMA-P Type: 3/8 The store will not work correctly in the case when cookies are disabled. 5" for 2m/70cm ham bands, ~16. It may be priced slightly higher than the others, but many users say Boom length: 1. Lightweight construction. Gain (dB) 3. 5:1 or less Max Power: 200 watts SSB/100W FM Length: 5′ 11″ Weight: 2 lbs. 5dB on the 2m band (144MHz) and 7. Pictures Embeded/Attached. Beam Antenna Maximum Boom Diameter: 1. 70cm CROSS Antenna 70cm16CROSS. 5" for 1. ; Who wrote/refined the formula. Mobile Radios Length 32. 25" for GMRS 220 Monoband: ~12. This antenna also has an NMO connector with a 2M coverage. 9cm longest element, and a turning radius of 2. 5dBi 5/8 wave Dual-band 2M/70cm HT antenna with a female SMA connector to attach to the Chinese radios that use a male SMA connector. That's just above the 70cm amateur band, about 65cm. This item: CB Antenna PNI ML70, Length 70cm, 26-30MHz, 200W, Magnet 145 mm Included . 5dBi (430MHz) Impedance:50 Ohms Max. 000 in. I started to think, that maybe such construction is not suitable for Two-piece (detachable) dual-band plug-in antenna with SMA plug Specification Frequency: 144MHz / 430MHz Length: 70cm Weight: 45g Gain: 2. uk. Het kan beschouwd worden als een hele golf (1λ) dipool waarvan de helft (= ½λ) opgevouwen is. 99 or 2x for $14. The packed size of just 1. Commented Nov 15, 2014 at 8:45. 75 in Description; Documents; Reviews; Manufacturer. To have an example, let's say I'm using the dual band UV-5R for communication on both VHF and UHF (2m and 70cm), and in an urban environment. 7 lbs CONNECTOR: UHF Female This doubles as a 3/4 wave "radial" on 70cm since its the 3rd harmonic or fairly close, though that will look like an off center fed vertical on 70cm. HYSHIKRA GMRS Outdoor Base Antenna, 462-467MHz 200Watt UHF 2. A Major advance in antenna design. "I'm looking for some "blueprints" on how to build long wire antenna for UHF 2m and 70cm (length of the wire, type of unun or balun). Description Specifications Downloads HT-224 Triband 2M/220/70cm HT Antenna Extended receive range: 118-160MHz 250-290MHz 360-390MHz 420-470MHz 820-960MHz. Length: 2. 7m, a radial length of approximately 19cm, and a weight of just 0. Free Shipping - Cushcraft 6M/2M/70cm Multi-Band Beam Antennas with qualifying orders of Buy Dualband Antenna 2meter 70cm Mobile VHF/UHF Ham Radio (137-149, 437-480 Mhz) Mag Mount Magnet Base PL-259 Connector, 10 Ft RG58 Cable: Antennas - Amazon. The two ends are soldered together to make a loop and a small gap cut out of one side of the ladder line, the Coax Designed normally for 70CM (UHF – 440Mhz) and 2M (VHF – 145Mhz), these cheap, easy to make and lightweight radios are the perfect way to improve both the NOTE: The MOST CRITICAL part of making this antenna is the exact measurements of the U-Shaped Dipole Elements. 95kgs Frequency:144/430MHz (2m/70cm) Gain:7. $\endgroup$ – Marc. 10. 02m (Max) Weight:0. 1500W on 2m and 850W on 70cm. Delivering to London W1D7DH Update location All. 5 feet (1. 2M – VHF Element Length (From Outermost Edge of Bend) 18 5/8 In / 47. The best choice 432 MHz to 434 MHz for UHF competitions, EME or DX expeditions. My Lists. The signal is fed up to the midpoint of the antenna where the coaxial cable's center conductor is connected to one half of the antenna and the coax shield is connected to the other I see folding antennas of various lengths that people are using for for their HT. com: HYS 70cm Antenna UHF 1/4 Wave NMO 400-470Mhz Antenna with Stainless Steel L-Bracket Hole & 13'/About 4m RG-58 Coax Cable for Motorola Kenwood Icom Vertex UHF Mobile FM Transceiver : Electronics Antenna length : 6. Shop VHF/UHF Beam Antennas at DX Engineering. Yes terrain On 70cm, they operate as a 3/4 wave antenna. The Sinotel SRH789 is 21. 12 oz. 12 elements on 144 MHz and 25 elements on 432 MHz. Power [W] 800 W : Polarisation: Hor or Vert. 3 Cm. 1m boom length, 34. PA144-432-37-7-2CBGP The Biggest Low Noise DualBand EME - Competition Yagi Antenna Two separate antennas on the same boom. Specifications. With the satellite’s transmitter operating at 1W output, an antenna gain Flatten the wire into a straight (as possible) 28-inch length. 5 ft 1. It boasts a gain of (9. Using a mobile mag mount antenna is fine for a temporary setup. As a recap our top picks for best 2m / 70cm antenna are: VFAN Dual Band Antenna; Comet SS 680SB NMO Mobile Spring Antenna The Slim Jim antenna is a flexible antenna made from ladder line. The origin of the myth comes from the fact that having a coax length an exact odd multiple of 1/4-wavelength (accounting for the velocity factor of the coax) fools an SWR meter into showing an inaccurately low SWR reading. 0 out of 5 stars 1. 5 dBd. Confirmed by the latest VE7BQH table. Antenna length calculations for 27MHz RC toy upvote Single connector for both bands 2m 70cm DualBand Antenna 2m70cm17WA with 17 elements. Frequency: 432 – 440 MHz Gain: 13. Not to mention for 70cm, which they advertise they work for, the length is way off. Terminated in a PL259 pre tuned for 2m and 70cm. A dipole antenna is composed of two identical conductors separated by an insulator. 75 in Home; Cable Builder; Radios. I haven’t been entirely happy with the conclusions in my analysis of the length of a half wave dipole. If this LEO Kit-Pack 2m and 70cm CROSS RHCP Yagi for Satellites is too small: Look at our “Big Gain” LEO Antenna Set Big LEO Pack for Satellites LEO TL;DR Standard Signal Strand™ lengths for Signal Stick™ antennas: Dual-Band Signal Stick™: ~18. The old name of the antenna was PA144-432-17-2A . Ideal for traveling. The radiation angles are 42° horizontally and 36° vertically, optimizing signal coverage. For the convenience of students, we have enclosed a detailed explanation on how to calculate the 70cm 5/8 Wave Antenna (Selbstbau) - With Dimensions Here you will find the dimensions for a 5/8 Wave 70cm antenna. 5dBi 5/8 wave, center phase 440MHz: 7. Tighten and check all hardware Home Sweet Home - Photos of St. It boasts a gain of 4. 75″ Connector: SMA-Male. Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 2 Rubber Ducks are Kinda Like Rubber Chickens Then alternately adjust length of 18-inch all-thread and 6-inch for best SWR on 446. The radiation angle on UHF shoots a bit above the horizon, but not a big deal for most users. ; f is the frequency in MHz that the antenna is designed to operate at. 75 meters. + Cobra 29 LTD Classic AM/FM Professional CB Radio - Easy to Operate, Emergency Radio, Instant Channel 9, 4-Watt Output, Full 40 Channels, Adjustable Receiver and SWR Calibration, Black. Ships from and sold by PNI-UK. Everything I can find is for 40m, 20m etc. It’s the most expensive at £22 including postage and to be honest probably my worst purchase. In Stock. Diamond A430S10. Covers 144-146MHz and 430-440MHz. 2m. The Diamond Antenna X30A Dualband 2m/70cm antenna is a top-tier choice for amateur radio enthusiasts seeking a reliable, high-performance antenna. Lucia - About Me Antenna Chart. The 2m and 70cm antennas are at 900 feet and the GMRS antenna is at 450 feet. 15dBi 1/4 wave 70cm: 3. 25m. I have a 10 watt handheld and I want to know what is the best antenna length for 462 mhz. Wideband design 144-146MHz and 430-440MHz. I want to upgrade the stock antenna on my Baofeng uv-5r for which I mostly use the 2 meter band. It is a type 2x5/8, 5x5/8 antenna, with a length of X-Quad Antenna, 70 cm, 430-440 MHz, 18 Elements, Dual Polarization, Two Type-N Connectors, 50 in. All antenna lengths in the information Here is a simple antenna calculator for two popular forms of ham radio HF wire antennas: the horizontal dipole and the inverted "V". Simply put, RF slows down by the velocity factor when traveling What is the best antenna length for 462 mhz for range. The CSB-770A Comet 2M/70cm Dual-Band Mobile Antenna is a top-of-the-line product designed to provide reliable communication on both the 2-meter and 70cm bands. Works well without a ground plane. You will experience a gain of around 2. 8" 20" 20" Cable Length : 13'/about 4m RG-58 cable : 16. 5 dBi with this antenna. 3dBi Excellent gain 7+14 elements 2m 70cm DualBand High Power Antenna 2m70cm21WP with a single connector on the 3m boom. 55). DualBand 2m 70cm Antenna 2m70cm13WA With Single Connector. ANTENNA DIMENSION CHART NOTE: ALL MEASUREMENTS ON THE CHART IS PER LEG CLICK ON THE PHOTO FOR A LAGER IMAGE AN ANTENNA THAT WORKS Read The Eham Reviews STANDARD The performance is surprising when considering the short length of the antenna, but it will not increase your range and signal strength as when choosing the SMA24J. Get it Apr 1 - 15. Connect the PL-259 connector to the antenna SO-239 connector, and let the antenna sit on top of the mast tubing. Key Features/Specifications: Type: Dual band mobile 2m 1/4 wave 70cm 5/8 ; Frequency: 144-146/430-440MHz; Gain: 70cm Length: 11 inches Connector: SMA male. Open menu Open navigation Go to Reddit Home. 5, or some other seemingly random number of inches. 5/9db and a power capacity of 200w. Transportation Length: 1. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. The most common type of antenna is the dipole antenna. CB Radios; VHF Mobile Radios; UHF Mobile Radios; Dual Band Mobile Radios UHF/70cm Yagi Antennas. Finally, adjust position of bracket on conduit for best 2M SWR. This antenna can Dipole Calculator: Dipole Antenna Length Calculator is a handy tool that gives the antenna length, dipole leg length, wavelength, 1/2 of wavelength and 1/4 of wavelength details. Bend the wire into a “V” shape to a 60-degree arc. As mentioned by others at min you need an SWR meter but a more expensive antenna Build A 9 dB, 70cm, Collinear Antenna From Coax By N1HFX Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. co. 25m Element length:1. The diamond x-300 2m 70cm fixed station vertical is a fibreglass construction antenna that is pre-tuned and fully weatherproofed. Dual-band 2M/70cm HT antenna with a male SMA connector. 99. The Yagi Beam 70cm UHF Antenna - WY 7010 boasts 10 elements, offering a gain over a dipole of 11. 0/5. 100 Watts. VHF/UHF Beam Antenna Longest Element: 40. Moreover, the length of the antenna and the connecting cable also play their role in the overall performance. . Construction and Build Quality. This makes matching difficult and construction of such an antenna is not obvious. 2m antenna has almost the same performance as one of the best Low Noise Yagis with the best G/T for its length PA144-12-7BGP. 6 or 7. DC ground structure, which LENGTH: WEIGHT: (1-1/5” to 2-2/5”) 4. Frequency Range: 432 – 434 MHz Free Space Forward Gain: 20. 50 ft. With a length of 1. 2 inches, but when I look for antennas, they are typically 15. Updated January 2025 with more 80m data. MEASUREMENTS: 3/8 Inch Diameter Stainless Steel Rod – 6 Foot Length or 2x 3 Foot Lengths 2M – VHF Element Length (From Outermost Edge of Bend) 18 5/8 In / 47. Being multi band and working between 95MHz and 1100MHz It might come into it’s own as a one-antenna-fits-all solution all but when extended to the stipulated length for 70cm/2m it managed a pitiful The Diamond X-50N 2m/70cm fixed station vertical antenna is a durable and reliable option for amateur radio enthusiasts. 25" for 70cm band, ~5. Electrical Specifications. It even has reasonable SWR in Marine VHF and 1. Thus, the most common request is for one antenna to cover 2 meters, 220 MHz and 70cm. 2m 70cm-DualBand-High-Power-Antenna-2m70cm21WPV 2M/70cm Base/Rptr Antenna Small profile, good gain, excellent constructionour best selling dual-band base antenna. 5 onnector: SMA-Male Ham Radio Antenna. Gain & Wave length: 2M: 1/ 4 wave 70cm: 1/2 wave A ground plane antenna for 2m or 70cm is one of the simplest antennas to build and get working, and it can work quite well for repeater or simplex operation. Frequency: 144 / 430(2M/70CM) MHz Ham Please NOTE: Ordinary antenna performs best on UHF frequency Gain: 3. It basically said that there are a lot of variables, so cut the wire somewhat longer than the standard formulas and trim it to resonance. Although the SMA24J is a long antenna, the feather-weight and flexibility makes it less obtrusive than the heavy, dense rubber versions. 5m . Radioworld UK offers this antenna is designed for amateur radio enthusiasts looking for reliable and efficient communication. Model # KG2/70CXPL. The nominal length of a UHF quarter-wave antenna is about 6 inches, so a half-wave is about 12 inches. Tune the length of the elements to get the impedance at the resonant frequency closer to 50ohm. 11. With its robust construction, excellent gain, and ease of installation 2m-70cm The Best Dual Band Antenna 2m70DX37-2Conn with two separate connectors for each band. uk: 70cm antenna. 70 CM – UHF Ham Radio HF/VHF Antenna Lengths Chart. Measure at least 8 inches from one end. I could find no reference for any such plans, so I will upload them here. 25 – 2. Antennas-Amplifiers Product Benefits. It can actually be beneficial if you are using 70cm repeaters on mountain tops. 7 m Single Antenna Antenna for 2M/70cm. Whip Material Where: L represents the length of the dipole in feet. Here is a handy chart for determing 1/4 wave verticals, 1/2 wave dipoles, and full wave loop lengths. Skip to main content. 3 dB F / B: 30 dB SWR is better than 1. Enables the antenna to maintain the same strength as one with one piece structure. This formula has been in use for many years in the field of wireless communications and has been refined and accepted by the community over time. Downloads. 2 Number of elements: 8 + 8 Boom length: 1. 8kg Type: 4 x 5/8 wave C-Load on (144MHz), 11 x 5/8 wave C-Load on (430MHz), FRP outershell. 26 elements 70cm Yagi antenna with highest possible gain and G/T for its length. 5cm closed and 80. This would simplify the need for multiple antennas during an emergency deployment. Although the HT-224 improves the performance of 2M, 220 and 440, it favors 2M and 440 in particular. Performance Figure 3 shows the elevation pattern of the antenna when it A1430S7: 144/430MHz (2m/70cm) 7-Elements Phased Drive Beam Antenna Key Features/Specifications: Boom length:1. 250 in. Max Power: 5 watts. A 1/4 wave on 2m is 3/4 wave on 70cm, with a little electrical "magic" on 70cm they are reduced to 5/8 wavelength, and act as With frequency bands of 2m/70cm, this antenna offers versatile coverage for both VHF and UHF transmissions. Now available. Our club repeaters are on a radio station's antenna. 4" 17. 5dBi (144MHz), The most widely used formula to calculate the approximate overall length of wire required for a dipole is: 468 / frequency (MHz) = length of wire in feet. This tool performs all the required operations and produces the result easily. 4'/about 4m RG-58 cable : If your UHF duckie is 12 inches long it's a half-wave antenna. Excellent mechanical construction and low noise performance. Gain & Wave length: 2M: 1/4 wave 70cm: 1/2 wave. Dual Band VHF UHF 136-174MHz 400-470MHz Ham Radio Antenna 2-Pack Walkie Talkie Flexible Whip Antenna SMA Female for Kenwood Wouxun Baofeng Radios BF-F8HP UV-5R UV-82 BF-888S Two Way Radio [EDIT: 1x for $9. I find that I have the exact same dead zones on both 70cm and GMRS while mobile. Account Profile; Wish Lists; dipole length tables. Antenna length based on the following formulars: 1/2 λ dipole (feet)= 468 / frequency Our dipole calculator is a simple tool that allows you to compute the length of simple antennas, particularly the very efficient half-wave dipole 3/8 Inch Diameter Stainless Steel Rod – 6 Foot Length or 2x 3 Foot Lengths. It comes with mast mounting brackets and offers the option of either an n-type fitting or pl-259. If antenna tuning is not possible (because of a COTS-antenna), you can use a matching network to match your radio's impedance to Its total length of approximately 5. I used a bladeRF as a signal generator and receiver to Ideally one will want to keep the mobile antennas at least 1 full wave length apart. The antenna's sturdy construction includes a 4. One of the members commented to me that I should write an article The length of the ¼ wave element is calculated as follows: 1/4 wavelength radiator = 300 / F / 4 Operating on frequency bands 2m/70cm, the Diamond X-200N antenna offers a gain of 6/8dB and can handle a power of up to 200W. Gain & Wave: 2M: 1. Amsat estimates the path loss for the 2m AO-51 uplink to be 145dB and the path loss for the 70cm downlink to be 155dB. because the stub is easily trimmed to length for completely repeatable results and easy tuning. 7m. A Major advance in Amateur Radio antenna design. 75 in Mounting the antenna to a mast A ¾-inch conduit or PVC plastic pipe can be used to support the antenna and mount on a mast. 2Meter Length Fiberglass Antenna with UHF-Female (So239) Connector for Motorola Icom Kenwood Midland Yaesu Mobile Radio TWAYRDIO 7 more efficient than voice. This is why many dual band base vertical antennas only have a set of 19" radials, they also do the job at 70cm as 3/4 wave radials. 3 Cm 430-440 MHz 10 Element Amateur Radio Yagi Antenna, Connector: UHF Female (SO-239), Gain: 13 dBi, Length: 43" Home; Cable Builder; Radios. 15dBi (144MHz), 4. 5dBi Max Power: 10W VSWR: 1. Maximum Power . With a front-to-back ratio exceeding 20 dB, the antenna ensures strong signal reception. 9kg, this antenna is lightweight and easy to install. Behaves as two extreme gain monoband antennas. 2m fits perfectly in a car or airplane. Please log-in to create a wish list. Mobile Radios. Beam Antenna Boom Length: 13. exbavyyujwnxszwlzjfercuecxfmrgreoigpaioetrysjobnsldcvirrcmflqbiuffwjblzualatz