Homebrew 440 mhz antenna

The project shown here refers to the frequency of 433.92 MHz. To understand this article, a minimum knowledge of antenna theory and an experience of the 4NEC2 program or similar is required. ... · Director length = 0.440 lamba · Reflector/dipole spacing = 0.125 lambda · Dipole/director spacing = 0.125 lambda Based on the general formulas.

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If you don't mind shifting your DIY attention to a home-brew 6m/10m vertical (perhaps a trap implementation), you might look at a triplexer like this that gives: low pass at <90 MHz for 10/6m; mid pass at 130-200 MHz for 2m; hi pass at 380-500 MHz for 70cm. Five Element Portable Hand Held Yagi - for 70 cm. 440-7. Seven Element Portable Hand Held Yagi - for 70 cm (37 1/2 " Boom) 146/437-10. LEO Satellite Antenna - 3 Elements for 2 Meters crossed with 7 Elements for 70 cm. 146/437-14. Alaskan Arrow LEO Satellite Antenna - 4 Elements for 2 Meters crossed with 10 Elements for 70 cm. 121.5-3.

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For my first duplexer in the 1990’s, my interest was the 420-450 MHz amateur UHF band, 70cm. At that time, common hardware store copper water pipe and fittings were reasonably priced and were very suitable for building UHF cavities. Today, aluminum is generally my preference, as we will see in the next chapter.

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70 cm (432/440 MHz) 33/23/13 cm (902/1296/2400 MHz) Ho Loops / HO Loop Accessories; Satellite Products; EME Products; DX-Pedition / Portable Products; Antenna Bundle Deals; Positioners. ... We design and manufacture our products using computers, optimized both for antenna performance and for mechanical longevity. Materials are carefully.

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1-1/4 meter mobile gain antenna with trunk lip mount between commercial and homebrew antennas, between different homebrew designs, and between different commercial designs 000 MHZ its 0 The conduit radome provides a robust and sturdy enclosure for the antenna, and if required, it can be mounted outside in the weather Demonstrating performance.

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High-performance stealthy 2 meter/440 VHF/UHF antenna for amateur radio. Toggle navigation. Products & Services; Gold Certified Pre-Owned™ ... SWR: Better than 1.5:1 for the entire 2 meter band (144-148 MHz). 2:1 or better 142-150 MHz. 3.1:1 or better 418-458 MHz. 2:1 or better 438-451 MHz. Resonance: Approx 146 Mhz on 2m band. Approx 445MHz.

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Homebrew quagi antenna for the PMR band (446 MHz) Antenna from a few bucks Date of the last modification: 26.03.2010. ... The choke balun around 400 MHz is created from 3-4 loops of the coax with relatively small diameter (4-5 cm / 1 ½-2 inches) as close to the feedpoint as possible. Bind the turns with 2-3 tie.

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Get homebrew quagi antenna for the pmr band 446 mhz PDF file for free from our online lib HOMEBREW QUAGI ANTENNA FOR THE PMR BAND 446 MHZ --- | PDF | 77 Pages | 401.17 KB | 22 Sep, 2014.

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A Yagi-Uda antenna popularly known as the Yagi antenna is perhaps one of the finest inventions ever made in the field of antennas that revolutionized the world of radio communication. In HamSphere 4 April 25, 2015 Real vs HamSphere Virtual vs Hybrid Radio communication and Amateur Radio as the terms suggest, clearly define the mode of.

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440 Mhz J-Pole Antenna plans - Here is a 70cm (440 Mhz) J-Pole antenna that is inexpensive, and easy to build. • 222 MHz antenna - recommended stacking distance is 6 feet. All articles are in Adobe PDF format. 2 J-POLE ANTENNA FOR 2m W. Click on any bold model number below to view or download a PDF manual.

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For 2M (144-146MHz) I’ve experimented in constructing a “ J-Pole antenna “. Essentially, this is no more than a length of copper pipe folded back on itself with the feeder connected across the fold, a short distance away. My experimental J-Pole was constructed from a length of copper tube, the very same tube that is used for car brake.

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440 MHz Antennas are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 440 MHz Antennas. Skip to Main Content. 080 42650000. Contact Mouser (Bangalore) 080 42650000 | Feedback. Change Location English INR ₹ INR $ USD India. Please confirm your currency selection:.

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Common Amateur Radio Antennas. The J Pole. The Super J Pole. Omnidirectional. Yagi. Quads. Quagi My Stacked Quads The picture above is of my 440 MHz stacked quads. The spacing between the antennas is approximately 80-90% of the boom length. RG-59 (75 ohm) cable was used on the phasing harness. An almost perfect 1:1 SWR was achieved at 446 MHz.

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BCD-440 Frequencies Available: 400-430 MHz, 430-450 MHz, 450-470 MHz, 470-490 MHz; Frequency spacing 5 - 8 MHz; Max Input Power: 50W; Insertion loss Rx and Antenna Port 1.5 dB; Rx isolation at Tx frequency: >80 dB; Tx Noise Suppression at TX Ant Port >80 dB ... One of my build projects is a homebrew digital mode repeater using two packet.

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43 ELEMENT LONG YAGI - 98.5' (32.349 m) long portable antenna for 2 M VHF-UHF Portable Yagi-Uda Antenna Design 2 Meter Beam Antenna Dishes for Amateurs KA0Y's 50' Dish - It's a big one! Dual Band (2M/440 MHz) Walking Stick Antenna Antenna Page - VHF / UHF designs Home Brew dual band mobile antenna - A 1/4 wavelength resonator for both the UHF.

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is a homebrew coaxial dipole built from a small stainless whip, a length of threaded table-lamp tubing and some 3⁄ 4 inch cop-per and PVC fittings. The one shown is for 440 MHz but it can readily be scaled for 146 or 220 MHz. For homebrew vertical VHF antennas, coaxial dipoles often play second fiddle to J-poles. That's because the center.

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This little antenna is cheap and easy to build, lightweight, and very functional on 2 meters and 70 centimeters. The finished product will look like this: Let's get started! For the welding rods you need the following: (1) piece 25 & 1/8 inches long. (2) pieces 6 & 1/2 inches long. (2) pieces 19 & 1/2 inches long..

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Homebrew 2 meter Yagi construction. • 2 1/4 inch x 48 inch Steel rods (I know they'll rust, it's just temporary to get it to work, I'll get aluminum later) I don't have any coaxial cable (don't know the best type to get) and don't know how to match the impedance of the cable to the antenna. So, what is everything else I need, and instructions.

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Homebrew capacitors for antennas, matchers or whatever. ... This not a problem on hf, a minor problem on 2 meters , very noticeable on 440 mhz and can destroy a 1.2 ghz design. Ever scale an antenna up from a lower band and have it work poorly? Same problem. This program will give element correction factors for top insulated elements and.

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Amateur Radio, Antenna Theory, Homebrew Antennas, Hidden and Stealth Antennas, CC&R's, and Antenna restriction. Check Here If You Want To Open Links In A New Window ... 2 Meter Antennas 2M/440 MHz Dual Band Copper J-Pole From N7QVC 2M Fan Antenna (Yes From an Electrical fan) 2 M 1/2-Wave J-Pole-- VHF-FM.

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The antenna is constructed using 1/2” copper pipe and copper fittings. Cost <$25. The center section utilizes a 1/2” NIBCO CPVC SxSxS Tee purchased at Home Depot. This plastic tee inside diameter matches the outside diameter of 1/2” copper pipe. Construct two half sections of the dipole using the dimensions in the following image (Image A).

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The more common coax collinear requires a PVC radome to give it rigidity and weather proofing, and assembly can be difficult. The 2 - 440 Collinear vertical in this project is simple to build and expand, semi rigid, self supporting, water tight, electrically sound, and a professional appearance when completed.

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The developed antenna has been measured with a VNA in terms of SWR and S11 parameters. The result shows that antenna has a bandwidth between 419.5 and 451.2 MHz with the respect of SWR of 2:1, which is more than enough for the 70 cm band (430-440 MHz). F4HWK Add Tip Ask Question Comment Download Participated in the Invention Challenge 2017.

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440 MHz Amateur Radio J-Pole Antenna $ 30.00 - $ 34.00 Looking for a dedicated antenna for UHF operations? Tuned to 445 MHz, the UHF band J-Pole antenna covers the upper half of the 70cm amateur radio band, which includes the repeater, remote base, link control, and simplex allocations of this band. connector $ 30.00 Add to cart. 1-1/4 meter mobile gain antenna with trunk lip mount between commercial and homebrew antennas, between different homebrew designs, and between different commercial designs 000 MHZ its 0 The conduit radome provides a robust and sturdy enclosure for the antenna, and if required, it can be mounted outside in the weather Demonstrating performance.

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From many popular antenna design web sites, we can see most people using the standard formula, 585/f (178.308/f for metric) MHz to calculate the vertical element lengths. This formula is based on a theoritical 5/8 wave antenna build by a wire. If the antenna is constructed by larger diameter material, its length will be shorter, due to larger.

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the roof than you can build 2-3 meter (6-9 feet) long antennas, focusing on the weatherproof design. The quagi My plan was to create an antenna what is easy to build, cheaper than the ATK-5, but has at least the same gain as the yagi. Hence I choose the quagi. The quagi was developed in the early '70s by two radio amateurs.. Dropshipped from M2 Antenna Yagi Antenna. Frequency Range: 420-440 MHz, Boom Length: 21', Elements: ... $538.99 $510.99 You Save: $28.00 (5%) SKU: 436CP30 M2 Antenna. Base Antenna Dropshipped from M2 Antenna Polarized Yagi Antenna..

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K9AY Loop antenn för (40), 80 och 160 meterFrom Array Solutions comes this control box AS-AYL-4 for assembling a low band receiving antenna in four directions based on the famous K9AY loop concept. It attenuates unwanted signals with up to 30 dB. It comes with a control box (se photo) and an external rely box that is mounted at the mast. A 7.2 m high mast is needed to.

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I'm looking at picking up the TYT TH-9800, which is a Quad-Band FM radio on 10m/6m/2m and 440 (I'm lucky enough to have some 6m and 10m repeaters in the area). ... I know there exists quad band antenna... Stack Exchange Network. ... low pass at <90 MHz for 10/6m; mid pass at 130-200 MHz for 2m;.

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Get the best deals on antenna tuner when you shop the largest online selection at eBay.com. Free shipping on many items | Browse your favorite brands | affordable prices. ... ICOM Model AH-4 Automatic Antenna Tuner, HF+50 MHz - New. $250.00. 1 bid. $35.59 shipping. Ending Apr 5 at 1:02PM PDT 6d 20h. MFJ-945E HF Antenna Tuner - 300W 1.8-60Mhz.

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At work in my cubicle I have some home brew antennas and other electronics trinkets such as LNBs, tubes, old radio parts - the staff has written me off as the "weird radio guy." ... Those are the dimensions for a two meter (144-148 MHz) antenna, one for 440 MHz would be about one-third that size. Reply. spongella SatelliteGuys Pro. May 12, 2012.

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The $4.00 Ham Radio Satellite Antenna by KGØZZ It's a dual band 2m/70 cm yagi antenna made with common materials and cost very little to make. Also, the antenna is fed with only one coaxial cable and does not use a duplexer. http://www.amateurradio.bz/4_dollar_satellite_antenna.html The 440MHz Slingshot Antenna Project by N9YBP.