Qfh antenna for sale. Lower power will also work well.

Qfh antenna for sale 1PCS Kit1. Sep 17, 2019 · The QFH is designed for GPS frequencies, but can potentially be used at the slightly higher Inmarsat and Iridium frequencies. QFH antenna is one among various antennas used to capture images from low level non geosynchronous satellites. Download and print QFH_BOTTOM 2 times, download and print QFH_BODY as many times you need to guarantee that the loops form helixes ( I printed 3) and cut 2 pieces of 2. 4 days ago · QuadriFilar Helix (QFH) Antennas. The QFH is designed for GPS frequencies, but can potentially be used at the slightly higher Inmarsat and Iridium frequencies. The SQFH400G5 Quadrifilar Helix antenna is supplied with a specially designed mounting Attic or Loft Antenna. Construction is cheap, and materials are easily available. I used a rectangular piece of wood and mounted an SO-239 socket on it. The Weather Satellite Antenna, model UC-1374-531 is a +4 dBic Quadrifilar Helix (16 cm/6" OD x 62 cm/24. Portune, W6NBC esigned for spacecraft use in the early days of space exploration, the quadrifilar helix (QFH) antenna has not gained much popularity on the ham bands. 7GHz L-Band qfh-antenna for SDR Radio Hot Sale High Quality . You can build QFH Antenna's of various sizes that are This is where the QFH Antenna comes in, it's actually two antennas, a small one inside a bigger one, that is of the proper dimensions so that it blocks out surrounding interference and receives signals very well on the 137. The Kit comprises a quantity 1 each of the following two -531 QFHA passive products, supporting old Modes J & B, or new Modes VU & UV: Click on the underlined text below for each item's details Mar 7, 2020 · Microsoft Word - How To Build A QFH. You can find instructions on how to build one all over the place, and a QFH is generally a better performer than the easier-to-build "turnstile" or double-crossed dipole antenna. Apr 8, 2023 · 1pc NEW Kit1. 137MHz QFH Antenna Supports thingiverse. VHF/UHF Antennas A VNA gives full clarity, and is a must if you are doing antenna designs. These antennas are enclosed in a Fiberglass Radome and they are suitable for a pole-mount. For further understanding of antenna theory or the Quadrifilar Helix Antenna in particular, see either Antennas by John D. A popular usage is for satellite reception. 4 out of 5 stars 24 Base Station Antenna Here's an easy to build VHF base-station antenna that works equally well toward the horizon or overhead. (2) Its radiation is just about as perfectly circularly polarized as you will ever find, in all directions . UC-1464-531L, LHCP VHF Amateur Satellite QFH Antenna, +4 dBic, Passive; UC-4364-328R, RHCP UHF Amateur Satellite QFH Antenna, +3 dBic, Passive; All of our Amateur Satellite antennas now have a connector at the antenna's housing, enabling us to maintain stock and be responsive to orders. l Interface: SMA female. For sale this home made V-Dipole antenna cut to 137. Only US$4. They often perform much better than indoor antennas. One of the two QFH antennas on NOAA-17 (Photo courtesy and (c) Lockheed Martin: The quadrifilar helicoidal antenna - quite a mouthful - is easy to construct (even though it does look complicated), and the results are excellent. TURBO-TENNA. 1PCS Kit 1. Apr 19, 2021 · It means that it’s a good antenna for 435 Mhz, but it’s the best antenna for around 380-390 Mhz. 95K subscribers in the RTLSDR community. This antenna is intended to be use to capture weather images of the NOAA satellites Will arrive partially assembled ,all you need is to attach the dipoles to the center piece and the 3/4 pvc pipe to the center base to support the antenna to the mast. WX-137 SERIES 137 MHz WEATHER SATELLITE ANTENNAS . The remaining terminals at the other end can be shorted together or left open. The goal of this product is to offer Amateurs with space or community restrictions the ability to receive 70 cm HamSat signals, and communicate through orbiting repeaters The UC-AMSAT-KITP-531, Passive 2 m / 70 cm Amateur Satellite QFHA Kit is a discounted bundle combination of a pair of our -531 full-size QFH antennas. Jun 22, 2016 · Over on Reddit user merg_flerg has uploaded an imgur post that carefully details a step by step guide for building a double cross antenna. In order to receive ANYTHING of quality a satellite would need to be located in the sky exactly where my TV antenna is pointed. May 16, 2010 · Not well, but, it can… The thing is, conditions need to be just right. QFH stands for Quadrifilar Helix or Quadrifilar helicoidal. from China. Feb 26, 2023 · As Promised, 433Mhz QFH #build . 5 m wire. Buy the kit on this page with the dongle and antenna or just the antenna kit and set it up in a v dipole configuration. These loops are shaped to receive a signal on 137MHz frequency and block out the rest of the noise. Ruperto, W3KH (SK) , published in the August, 1996 QST. 7GHz Center Frequency, 200MHz+ Bandwidth, LMR400 Feed Cable with Male SMA Connector, Mounting Hardware, & 2 Year Warranty 4. Alternative antennas for NOAA Fig1:QFH antenna[5] 1. Also there are some interesting hybrids that incorporate features from both QFH and spirals but generally they (because they have more than two arms) need exotic matching networks that For Sale; qfh 3d models 31 3d models An easier to print qfh antenna that can be adjusted for variance in pipe sizes. The quadrifilar helix antenna is a DC short circuit, and attaching this antenna to a receiver configured to supply a preamp will in all probability burn something out. 7GHz L-Band QFH Antenna Module sale online store at wholesale price. k. Feb 28, 2024 · For Ham Radio Transmitter 50Ω High Frequency Attenuator 0- 82dB Step Attenuator. us on June 27, 2019 (click link below): Video of NOAA-18 APT weather satellite image being received at antennas. With its specific helical design, weather satellites are received even at a very small angle above the horizon, as well as vertically. us using an UC-1374-531R antenna and 50 ft of LMR-240 coaxial cable, without an LNA, and an RTL-SDR USB dongle receiver. II. Though it is possible to make the phase difference with a phasing line (which is popular with the turnstile antenna), the most popular solution for the QFH is to use different loop sizes. 162 diameter) that I procured back in 2011/2012 from a company I used to work for as a Xfinity subcontractor (company went out of business in the middle of the day and literally told all the drivers to take what you want off the trucks and have a great life!) 10000+ "qfh antenna" printable 3D Models. Resources listed under Quadrifilar Helix Antenna category belongs to Antennas main collection, and get reviewed and rated 4 days ago · The QFH antenna also has a unique capability of receiving wanted signals for which it was designed, and rejecting unwanted signals. Since the antenna is used as a receiver, the source should be on the top. The August, 2022, Lecture and Lab will be held in-person at the Dallas Medical Center on Saturday, August 27th, at 10:00 am. 137MHz QFH Antenna for NOAA Satellites; 144MHz QFH Antenna for Amateur Radio Satellites (VHF) 435 MHz QFH Antenna for Amateur Radio Satellites (UHF) QFH COAX Feeders; Laptops For Sale; Radio Equipment For Sale; Desktop Computers For Sale; Links Weather Satellite Antenna description. There are 40mm, 50mm and Before connecting the antenna to the receiver, check that the receiver is not configured to supply a DC voltage down the center conductor of the feeder to supply a preamp. 5 of this antenna provides perfect matching and increased antenna efficiency with a peak gain of 5 dBi. Yet, as a general-purpose base-station Watch and listen to NOAA-18 APT weather satellite image being received at antennas. AO-90 and 91 are AMSAT OSCAR (Orbiting Satellite Carrying Amateur Radio), in this case FM satellites with UHF uplinks and VHF downlinks. Click to find the best Results for qfh antenna Models for your 3D Printer. Jul 2, 2024 · The Quadrifilar Helix Antenna, known as QFH, is a popular antenna for ham radio hobbyists who capture weather satellite images. 6GHz -1. It's actually two antennas that are formed by a larger loop and a smaller loop. Initial Testing Dec 18, 2022 · The QFH Antenna, courtesy of Eugene Ruperto, W3KH The latest revision of the instruction sheet and information guide is now available. circular polarization) So we need a antenna that can receive circular polarized signals. If you are wondering what Amateur Radio is about, it's basically a two way radio service where licensed operators throughout the world experiment and communicate with each other on frequencies reserved for license holders. or Best Offer +$2. 6ghz 1. The gain depends heavily on construction details but typically ranges from 0 to 3 dBi. However, there have been descriptions in the magazine of the Group for Earth Observation ( GEO ) of how to build a QFH using easily available copper pipe. I have always been a bit scared by QFHs because of their difficult construction: if you want a good symmetrical and rsistant antenna, you ought to use sopper tubing, which is difficult In the second video Tech Minds tests an L-Band QFH antenna salvaged from a Vaisala weather balloon radiosonde. We'll have an antenna… Nov 28, 2024 · Find many great new & used options and get the best deals for 1PC Kit 1. To obtain a circular polarization, it is necessary that the currents in both loops have a phase difference of 90 degrees. Nov 22, 2022 · The Quadrifilar Helix (QFH) antenna, with its unique design and circular polarization, ensures efficient NOAA satellite signal reception. Below are some resources and my learnings on building a QFH antenna. 7GHz L-Band qfh-antenna for SDR Radio. VSWR of below 1:1. This is a very brief overview and I encourge you to review the linked articles for a full For the antenna it is important to be somewhat precise, so measure three or four times before drilling or cutting. Designed a 3D printed 137 MHz V-Dipole antenna mounting for NOAA reception. The UC-4364-531 is a full-size Quadrifilar Helix Antenna (8 cm/3" OD x 30 cm/12" H) designed to operate through Amateur Radio satellites, without requiring an antenna rotator. This will be the upper part of your antenna. This means that it can receive satellite signals coming from the sky well. a. See, I've also come across this kit, and I'm also very into Meteorology and weather satellite reception. commercial grade antenna provides superior performance as compare to significantly larger and more expensive products. Blacktechlife (7459) 97. Please use a maximium uplink power of 5 watts to a 7 dBi gain antenna (25 w EIRP). 98, buy best DIY Kit 1. Opens in a new window or tab. 2/5pcs 10A Power Filter EMC Common Mode Inductor Wire Choke Ring Inductance. But patch antennas have a very narrow usable frequency and the spiral antennas unlike almost any other VHF/UHF antenna have the potential to be quite wideband. 4 out of 5 stars 24 The UC-4364-531 is a full-size Quadrifilar Helix Antenna (8 cm/3" OD x 30 cm/12" H) designed to operate through Amateur Radio satellites, without requiring an antenna rotator. 60. Most people report that the QFH antenna has slightly superior reception compared to the turnstile. Welcome to Reddit's own amateur (ham) radio club. The TV antenna is a highly directional piece of hardware which is pointing toward Green Bay where most of the TV broadcasts are located. make or buy QFH Quadrifial antenna for rocket check output power and impedance matching on the boards Reply reply KartoffelYeeter • I have those "rubber antennas on For the 136-138MHz spacecomm band, nothing beats the quadrifilar helix, or QFH for short. 6GHz 50 Ohms Qfh-Antenna DIY Kit for Aerospace Meteorology Positioning $8. Its peculiarity is that it is not made of either copper tubing (difficult to bend and solder) nor simple wire (does not give the optimal results and is less resistant to adverse meteorological conditions); it's made of a perforated metal strip (does it This is where the QFH Antenna comes in, it's actually two antennas, a small one inside a bigger one, that is of the proper dimensions so that it blocks out surrounding interference and receives signals very well on the 137. The signals sent from satellites are of circular polarisation. That also means you can use any (passive) antenna for both, receiving and transmitting. Description of the construction of a quadrifilar helicoidal antenna. Kraus or the article in ARRL “The W3KH Quadrifilar Helix Antenna” by Eugene F. Quadrifilar Helix (QFH) Antenna. Oct 25, 2021 · This item: Vanki 1Pcs L-Band Antenna 1. While… (1) 1 product ratings - Yagi Antenna UHF430-450MHz High Gain 7DBd fit for MD-390 BF-888S Two Way Radio Aug 9, 2019 · A key characteristic of antennas is that they are reciprocal. docx Author: crein Created Date: 3/7/2020 11:01:45 AM The UC-3004-531R, +4 dBic UHF Military Satcom QFH Antenna is a Quadrifilar Helix Antenna (QFHA), measuring 10 cm/4" OD x 46 cm/18" H, designed to operate through UHF Military satellites (MilSat). or Best Offer. Although I tried to catch some satellites on ~400 Mhz, I failed - there is so much noise in my area on these frequencies that it just didn’t work. Listed under the Antennas/Quadrifilar Helix category that is about QFH Quadrifilar Helix Antennas. I've also added some information about on-line resources. See full list on antennas. category is a curation of 17 web resources on , NOAA Satellite Reception with QFH Antenna, The Quadrifilar Helix Antenna, 137MHz Quadrifilar Antenna. However, Adams antenna is based on a very simple linearly polarized this is another antenna for the GOES satellites, as they are geo-synchronous, they can be pulled from any time, and they have two main broadcast frequencies 402Mhz, and 1690MHz. I have already built the general structure of a QFH antenna (Including placement of the copper wire), and I'm just waiting for some RG58 coax and SMA connectors . UC-1464-531L, LHCP VHF Amateur Satellite QFH Antenna, +4 dBic, Passive; UC-4364-513R, RHCP UHF Amateur Satellite QFH Antenna, +18 dBic, Active (built-in LNA) Description of the construction of a quadrifilar helicoidal antenna. 4 days ago · QFH Antennas provides circular polarization and a near hemispherical coverage. EUR 6. The older NOAA 15, 18, 19 satellites are scheduled for decommission this year, and will be leaving the 137MHz open to the Meteor M2 satellite but that is also being decommissioned, so there are other digital satellites Jun 30, 2023 · The solution is to build an antenna that is properly polarized in all directions, hence the QFH antenna. Its practical design resembles a spiral and helical pattern of its elements, thus enabling the magnitude and direction of electromagnetic fields to circular pattern during propagation. Here are the essential functions of it: 1. 59 $ 8 . The UC-4024-328 GOES Antenna is a full size, compact Quadrifilar Helix antenna (8 cm/3" OD x 32 cm/12" H) designed to operate through NOAA GOES geostationary satellites and CLS Argos low orbiting satellites. The miniVNA tiny+ covers 1MHz-3GHz for about $270. May 13, 2013 · A page showing a turnstile antenna for 137 MHz is here. Our SQFH series Quadrifilar Helix antennas are smaller than conventional yagi antenna. It provides link to Quadrifilar Helix Antenna Calculator which is useful to design QFH antenna. Easily deploy-able in any terrain and designed to thread directly onto telescopic poles readily available at most home improvement stores. The pole can be anchored with either an umbrella stand or tiki torch stake. 7GHz L-Band qfh-antenna for SDR Radio Hot Sale High Quality. 6GHz 1. 7ghz L-band Qfh-antenna for SDR Radio Repair Part at the best online prices at eBay! Free shipping for many products! A Quadrifilar Helix Antenna for 137 MHz By George Goodroe, KF4CPJ. That means it does not matter if you consider them in receive or transmit mode because both have the same characteristics. Quantity: More than 10 available 78 sold. 7GHz L-Band Qfh-antenna For SDR Radio. This antenna's compact size, weather resistance and gain makes it well suited for Argos marine uses and remote GOES sensor stations. Every Day new 3D Models from all over the World. Salient Features: We manufacture Circular Polarized Quadrifilar Helix Antenna for 137 MHz and 380-430 MHz frequency band. The Quadrifilar Helical Antenna (QHA, or QFH if you prefer) has two defining properties: (1) Its radiation pattern is just about as perfectly hemispherical as you will ever find. $5. A Quadrifilar Helix (QFH) is a circularly polarized antenna that can be constructed out of PVC pipe and coax cable. Of course, the coax can be continuous from the antenna, without installing a connector at the base. How to build a QFH Antenna What is the real world performance of a fixed 435 MHz QFH antenna for LEO satellite receiving? How does it compare to a small 7EL Yagi that requires manual p The helix uses copper tubing for filar winding which are held symmetrical to the vertical axis to maintain purity of the radiation. 5 MHz frequency band that the NOAA satellites transmit around. It is with deep regret that we have had to discontinue our RSS feed from Southgate News following the death of Richard, G4TUT This page covers QFH Antenna basics and QFH antenna calculator. Coverage is Omnidirectional, when mounted upright. I don't have any workshop where I could assemble a massive QFH antenna [for APT reception], and my V-dipole that I got I mustn't mount outside, because my parents wouldn't let me do that, the result being that my V-dipole picks up the APT signal very poorly. There are 40mm, 50mm and The trade-off is that the antenna has relatively low gain due to its main lobe being nearly hemispherical. Our antennas are designed to provide the best gain figures, for the requirements of the band and for the specific application where the antenna will be used. Click to find the best Results for antenna qfh Models for your 3D Printer. Antenna setup I did some digging into the LNA-100 and found that it does well enough for a general purpose LNA from 80-900 Mhz with very little noise. 00Mhz. 1PCS Kit 1. If adjusting for Doppler shift manually try tuning the uplink frequency while transmitting to keep the downlink frequency constant. daoer 1920 "antenna qfh" 3D Models. You won't get the reception you'd get with a qfh but it would be easier for you The Quadrifilar Helical Antenna (QHA, or QFH if you prefer) has two defining properties: (1) Its radiation pattern is just about as perfectly hemispherical as you will ever find. this should fit 1/2 pcv pipe/conduit as well Jan 27, 2015 · My setup, using a homemade QFH and a LNA-100 (NOT the LNA 1000, this is a ~$30 tv signal booster that works great). John E. Brand new | Business. We have a few choices like QFH (QuadriFiliar Helix) , Double Cross Antenna (Double Dipole) or Turnstyle Antenna. After I became a licensed amateur radio operator in August of 1995, I received a QST magazine which had an article that explained it was possible with the right antenna, the Quadrifilar Helix antenna (QHA), to receive the 137 MHz weather satellite transmissions. If you put the Antenna on the DUT (Device under test) port, you can put a second receive antenna on the DET port, and move it around to test the spatial gain. QuadriFilar Helix QFH antenna with circular polarization Diamond DP-KE137, for NOAA weather satellite reception on 137 Mhz and ACARS signals on 135Mhz. NOAA Satellite Signals With a PVC QFH Antenna and Laptop : This instructable covers everything you'll need to get started in being able to receive the APT (Automatic Picture Transmission) signals from the NOAA Satellites (NOAA-15, 18, and 19) flying overhead (and can be a foundation for listening to other s… Full-Size Amateur Radio Satellite QFH Antenna description. A subreddit for the low-cost software defined radio (SDR) community. FAQs How do I choose the right amateur antenna for ham radio? The four key factors when making this decision are cost, available space, performance efficiency, and durability. I have done a ton of research on QFH antennas and watched many videos, but the available information on QFH antennas seems very dull, and some of my questions are still left unanswered. QFH Antenna for 145mhz thingiverse. The Kit comprises a quantity 1 each of the following two -531 QFHA passive products, supporting old Modes J & B, or new Modes VU & UV: Click on the underlined text below for each item's details QuadriFilar Helix QFH antenna with circular polarization Diamond DP-KE137, for NOAA weather satellite reception on 137 Mhz and ACARS signals on 135Mhz. Easy Weather Satellite Reception with the QFH Antenna Anthony Mendina, NT5TM, August 27th, 2022 Version 1. Buy It For Sale; QFH Antenna for 145mhz 3d models 3080744 3d models found related to QFH Antenna for 145mhz. The photo below shows the finished ‘table-top’ antenna ready for action on the balcony. This polarisation is used because satellites are constantly moving and changing orientation. You can build QFH Antenna's of various sizes that are Dec 11, 2024 · NEW Kit1. It is very 4 days ago · QuadriFilar Helix (QFH) Antennas. So they should be somewhat easy to receive compared to UHF or higher downlinks. 130 votes, 18 comments. In this video we take a look at #howto #build a #QFH antenna for the @tinygs and @SatnogsOrgProject #communities, this #43 Feb 18, 2022 · Nooelec GOES Weather Satellite Mesh Antenna - 21dBi Parabolic Antenna w/ 1. 75 shipping. Power 2KW 1:1 Shortwave Antennas Balun 2-50MHz Frequency Shortwave Antenna Balun. Thumbnail Picture - Click to Enlarge The WX-137 series of antennas are marine-grade 137 MHz circularly polarized antennas designed to receive weather satellite images from the polar orbiting NOAA and Meteor satellites. Since in a helix antenna the direction of wire rotation dictates the sense of circular polarization, the input feed has two possibilities. Manufactured from stainless stee The UC-AMSAT-KITP-531, Passive 2 m / 70 cm Amateur Satellite QFHA Kit is a discounted bundle combination of a pair of our -531 full-size QFH antennas. Fabricate a base or mast attachment for the antenna. us Feb 18, 2022 · Nooelec GOES Weather Satellite Mesh Antenna - 21dBi Parabolic Antenna w/ 1. Changing that view often helps when wrapping your head around antenna topics. May 12, 2023 · 144MHz QFH Antenna for Amateur Radio Satellites (VHF) 435 MHz QFH Antenna for Amateur Radio Satellites (UHF) QFH COAX Feeders; Laptops For Sale; Radio Equipment For Sale; Desktop Computers For Sale; Links; Notice. The antenna I went for is called a QFH - quadrifilar helix - and appears to be only commercially available in expensive marine or professional versions. If used with a linearly polarized antenna, there is a 3 dB gain penalty incurred. If you own the Before connecting the antenna to the receiver, check that the receiver is not configured to supply a DC voltage down the center conductor of the feeder to supply a preamp. Subtle yet effective, attic antennas attach to the underside of your roof. Since the QFH antenna is stationary, Oribtron sends commands to SDR# and adjusts the frequency of the receiver to adjust for the doppler shift, as the selected satellite whizzes past at about 17,000 MPH (27358 KPH). They also has a 6GHz version for $600. 45. I have about 2000' of Solid AWG 6 grouding wire (. 5" H) designed to operate in the APT Weather Satellite Band of 137 MHz to 138 MHz (137-138 MHz). Step 11. So this week I've been experimenting with a QFH antenna I made for NOAA/Meteor reception. Most antenna designs for polar orbiting weather spacecraft are based on circularly polarized turnstile or QFH designs. Weight: 10 g. 8% positive; Sale ends in: 5d 15h. This model is for meteorological satellites, but a calculator is provided to adapt measure to other frequencies. Brand New. Jan 25, 2016 · This creates a need for a good omni directional antenna that can receive signals from anywhere. The Antenna was built with 40 mm pipe and 4mm aluminium fencing wire. For the Kit of both Passive antennas, visit the UC-AMSAT-KITP page instead. 59 Get it as soon as Tuesday, Dec 31 The latter was designed to offer a very compact antenna, yielding over +3 dBic gain across the Amateur UHF band. Ruperto (listed as superscript 1 throughout this guide for reference purposes) 1 With over two decades of experience, Harsh Synergetics (previously Synergetics International) develops antennas to support high-precision, real-time environmental data collection technology. A double cross antenna is great for reception of satellites like NOAA and Meteor since it has a sky oriented radiation pattern with very few nulls. Jul 26, 2020 · During my pursuit of the best antenna for receiving NOAA/Meteor images (I already built a Double-Cross antenna and a Turnstile), I decided to try a QFH antenna. Our expertise has created a versatile suite of antennas designed to meet the diverse needs of various environmental monitoring and control applications. The QFH antenna also has circular polarization. But not only this: The signal is rotating (a. 0 Part I: Constructing the Antenna The most important resource for preparing these instructions has been “The W3KH Quadrifilar Helix Antenna,” by Eugne F. Tech Minds combines the QFH antenna with a SAWBird Inmarsat LNA, but unfortunately finds that reception is too weak for any AERO decoding to be possible. Since many users also use the VHF model, there was little point in the kit having a compact UHF antenna, so we designed the full QFH version of the UHF antenna to match the performance of the VHF UC-1464-531 model. CHARACTERISTICS OF QFH ANTENNA The QFH has terminals at both ends, which can be fed at either end. Click on the hyperlinked text below for each item's details. 7GHz L-Band qfh-antenna for SDR Radio Repair Parts High Quality at the best online prices at eBay! Free shipping for many products! order to fascilitate understanding of its construction. 2 QFH ANTENNA'S FOUNDATIONS: A specialized antenna used in radio astronomy and satellite communication, the Quadrifilar Helix (QFH) antenna is made to receive circularly polarized transmissions. Lower power will also work well. This article explores the history, key characteristics, and practical modeling of QFH antennas using AN-SOF, providing valuable insights for RF engineers and enthusiasts. First choose the "up" side of the frame and mark a point about 10cm from the top. Mar 1, 2017 · Over on his blog Adam 9A4QV (seller of various RTL-SDR related goods including the LNA4ALL) has just made a post detailing a build of a high performance super simple NOAA/Meteor M2 weather satellite antenna. how to build a qfh quadrifilar helix antenna to download images from weather satellites a complete tutorial on assembling qfh antenna at home with simple and common tools. 137MHz QFH Antenna for NOAA Satellites; 144MHz QFH Antenna for Amateur Radio Satellites (VHF) 435 MHz QFH Antenna for Amateur Radio Satellites (UHF) QFH COAX Feeders; Laptops For Sale; Radio Equipment For Sale; Desktop Computers For Sale; Links Find many great new & used options and get the best deals for 1pc Replacement Kit 1. If you don't buy it with the dongle make sure yours has an sma connector, otherwise you'd need an adapter to connect it to your existing dongle. So I made this QFH antenna and needed a weatherproofing cap and supports to hold the wire, I thought I could share for those who might find them useful. vtxn opkbekr tsrfax zkpio xhfd mnke hvljtv vnfj iwyap vdncg