2m 70cm antenna diy
The 2-m/70-cm combination presents a different challenge because the frequency ratio is about 3:1. Consider two dipoles, cut for 20 and 10 meters. We can easily use both dipoles with a common feedpoint. The reason is fairly simple: when one dipole shows a low impedance, the other shows a high impedance.I had the opportunity to find some old Camping stools from SAVERS, a local thrift store, so I destroyed them and made a Moxon antenna!I have heard the storie...
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This is how my Diamond V-2000 is installed and the performance I have gotten out of this vertical antenna. The V2000 covers 6 meter, 2 meter and 70cm bandsBu...May 30, 2021 · This is post 2638 in a continuing series of simple ham radio antennas. Thanks to Clint of "Oxford Shortwave Log" for this coaxial collinear antenna system for 2m and 70cm. Depending on the materials in your "junk box", you could build this VHF/UHF antenna for almost no cost. Here are some comments from Clint:Fig. 1 Ultra-simple "wire" version above made on an SO-239 connector. Designed for hanging from any handy support and can be hung from trees, used inside motel rooms or as a "stealth" antenna. Fig 2. Table top "wire" version above using a dowel or other simple base. Upper and lower elements must be self supporting.Here are the plans to build a 2 meter J-pole antenna: The above dimensions for the J-pole are in inches. Measurements on overall length, and stub length are from the centerline of the separation pipe (horizontal) to the top of the antenna. The Connect at measurement is 2 1/4 inches from the top of the horizontal member to the point of ...
Antenna, 2m/1.25m/70cm Bands, 144/220/440MHz, Power Handling 85W for 2m, 50W for 220/440 MHz, 7.5 in. Height, NMO Mount, Each. Part Number: CAN-2M-220-440. 4.42 out of 5 stars. Estimated Ship Date: May 28, 2024 if ordered today. Free Shipping; Multiple Images; Video23 Apr 2017 ... VHF UHF antenna basics - DIY antennas from surplus 800mhz antennas for 2m 70cm and dual band · Comments110.For use on 2nd story balcony with an HT radio (DMR + Analog). Seeking something capable of at least a 12 mile radius and in a suburban area. Other buildings in the complex are two stories as well. Three antennas on my short list are the Ed Fong 5ft antenna, a J-pole, and a 17in Chinese dual bander from eBay.In this video, Dave shows us a simple step-by-step procedure to make a dual-band 2 meter and 70 centimeter ground plane antenna. This antenna will let you connect with both 2 meter and 70 cm repeaters in your area. The antenna is fairly easy to make with locally available materials. This homebrew dual-band antenna is suitable for both home and ...Here is a simple 2-element quad for 2m that is easy to build and does a good job. It works well for extending the range of an HT, transmitter hunting, SSB, or general use. When not in use it comes apart for storage. The SWR is less than 1.5 : 1 across the band from 144 to 148 MHz without any tuning. The boom can be rotated for either horizontal ...
Larsen NMO2/70B Dual Band Coil and Factory Tuned Black Whip for 2m/70cm Amateur Radio Frequencies, BLACK with NMO VHF/UHF antenna, Connector: NMO, Height: 34.5 inches VHF: Center Loaded 1/2 λ (144-148 MHz) UHF: Collinear (440-450 MHz) Gain (2m/70cm): 2.4 / 4.0 dBi Max Power: 100W, Color: Black This antenna is compatiblSun Sep 25, 2022 7:27 am. My first 2m/70cm was a home made job. Found a video on the net and followed that. 2 lengths of welding rod the type used with gas welding. Literally bent in a tight U with one end at 19" and the other at 9" those are just a guess but you will find the video easy enough you need 2 the same. ….
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=====More information on my website at http://www.fuzzthepiguy.tech=====Here are the measurem...If you build the antenna as shown, the computer model predicts 11 dBi gain and a front-to-back ratio of 20 dB. ARRL Lab measurements confirmed the computer-predicted antenna pattern. You may wish to read further about tuning adjustments in The ARRL Handbook. It describes how to check the antenna with a field-strength meter, or by using
My first dipole antenna with cost breakdown. It comes out to about $40 if you have to buy everything, $12 if you already have some electronic / hobby-type ma...52-1BP. Dipole for 6m with split boom. With holes and optional elements for 6m, 2m, 1.25m and 70cm. This allows one boom to be carried for all those bands. This antenna was designed for SOTA. 10W. Micro Duplexer for the 146/437-10 Satellite Antenna (10 Watts) (fits inside the handle) 437X14.
10 day forecast riverside california The antenna length formulas used in our dipole length calculator are as follows: L = 468 / f. l = L / 2. 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. f — the desired frequency. We also used the simple wavelength formula: Wavelength = c / f.I'm confident you will find this portable "J" to far exceed any other antenna, in the same setup, to more than tripling your 2m & 70cm (440MHz) performance! Here is a step-by-step to make a portable (or base) 3/4 inch copper-pipe "J" that breaks down into four (~24" long) pieces for easy transporting. This design uses a Bungie-cord to keep all ... craigslist cars for sale by owner near pittsburg cafunny blooket names for school 7 May 2024 ... Comments42 ; Tape Measure Yagi-Uda Antenna 2m/70cm DIY: A inexpensive easy alternative to the usual build. Ham Radio Rookie · 12K views ; Raddy ... blue's clues i did that credits Dualband Antenna’s. 2×4 2m/70cm Compact Satt Comm Antenna; 2×3 2m/70cm Cross Yagi – compact build; Build 3 x 5 2m/70cm Cross Yagi 145-435Mhz; Build the 3 x 5 Elements 2m/70cm Yagi; VHF antenna’s. 2 Elements Yagi 144Mhz; 7 Elements Yagi for 146Mhz band build; 2 Elements Yagi build for 107Mhz FM Band; Build the 5 Elements …The antenna arrived at is shown below, and looks very similar to a standard 2m quarter wave ground plane except radial and radiator lengths and radial angle. However, the dimensions are sub optimal for min SWR for 145MHz but enable a 3/2 wavelength antenna on 70cm as we will see. movie times orland parkz445 drive belt diagrampoor things showtimes near regal manchester fresno Members of LEARC gathered to build a variation of a Moxon 2m/70cm antenna, which will later be used to track and communicate with others over satellites. Herbie, GI6JPO, had prepared the build materials in advance to speed up the assembly of the antennas. Lengths of PVC conduit were cut to length, with the holes for the elements … publix super market at narcoossee shoppes Dualband Antenna's. 2×4 2m/70cm Compact Satt Comm Antenna; 2×3 2m/70cm Cross Yagi - compact build; Build 3 x 5 2m/70cm Cross Yagi 145-435Mhz; Build the 3 x 5 Elements 2m/70cm Yagi; VHF antenna's. 2 Elements Yagi 144Mhz; 7 Elements Yagi for 146Mhz band build; 2 Elements Yagi build for 107Mhz FM Band; Build the 5 Elements 2m VHF Yagi ku smart square loginel pulpo monroviamobile home tub surround 54x27 The half wave 2M version of the Flower Pot antenna is easily modified to a dual band antenna for operation on a band that is the [approximate] third harmonic of the fundamental resonance. [e.g. 145MHz x 3 = 435MHz - that's 2M to 70cm or VHF to UHF] The modification involves placing a coax phasing sleeve of aluminium foil around the outside ...