Auto tuned magnetic loop antenna. The loop antenna will still tune properly.

Auto tuned magnetic loop antenna As far as coupling is concerned I was thinking of using a gamma match A simple but efficient way to easily control a Magnetic Loop Antenna. AlexLoop wins, but would really win if it can be tuned remotely. the buddistick which hopefully will appear here soon. HG3 STEPPER MAG LOOP antenna pdf manual download. Irritation being the mother of invention, I decided to design my own automatic tuner, based on a simple sense antenna providing feedback, and now I happily QSY at the touch of a button. A closed loop stepper driver is used to drive a stepper motor to rotate either a butterfly, or vacuum variable capacitor. The exclusive AlexTune LED indicator makes tuning this portable magnetic loop easier by illuminating when tuned to the best position! VHF UHF HF Antenna Design & Manufacturer of Magnetic Loop, Dipole, Vertical, Yagi, MagLoop, End-fed for EmComm, Ham, Amateur, and Military. View and Download PreciseRF HG3 STEPPER MAG LOOP user manual online. Ideally, a loop antenna is designed to be portable, easy to assemble, small enough to use when camping or operating in remote locations, and able to cover several bands. Magnetic Loop Antenna Automated Tuner: Hello community - Dave here (radio callsign G7IYK), I am very pleased to publish details of my latest project which is a magnetic loop (ML) antenna automated tuner. The controller uses a very low-power DDS oscillator to tune the loop so it will tune right through your amplifier. , would be a different story, so we want the auto tune capability for the antenna to be practical. Aug 5, 2024 · The tutorial of a DIY magnetic loop antenna for the amateur radio band featuring a remote tuning system implemented on Arduino with a RC servo. How to deploy a magnetic loop antenna MagLoop and tune, choose placement location, near and far field patterns, and more recommendations Auto Tuning Magnetic LOOP I was playing around with magnetic loop antennas for QRP and it was bothersome having to tune very carefully the loop after a change of frequency of only a few kHz. However, their signal to noise ratio far exceeds that of a dipole. Jan 6, 2020 · A magnet loop is not a new antenna. 0 and 3.  A new 313 pF matching cap When i tune my magloops i use a signal generator at the given frequency with an FM modulated tone, once tuned i then have a rotary switch to switch between a dummy load back over to the radio antenna. Via Hackaday, I recently discovered this innovative self-tuning passive loop antenna design by Eric Sorensen. In case you'd prefer a mode… Find Parts and Accessories magnetic loop antenna KEYWORD and get Free Shipping on Most Orders Over $99 at DX Engineering!. It employs a proven, accurate and repeatable stepper motor design. The Army Loop,[1] on which I will concentrate, suits the lower bands, and for convenience is best operated from close to the antenna, although once tuned up, the feed line can be any length. A rotary encoder is used to manually tune the capacitor but when auto tune is selected from the Main Menu, full automatic tuning is achieved by I just bought your antenna, and my only issue with it is having to stick my hand out of the window to tune it. So there, you now caught up with my antenna project. The HG3 QRO Stepper tuned Magnetic Loop Antenna delivers 1 KW power and unprecedented capability, performance, and convenience. It is just an inductor formed by a wire loop and a capacitor tuned to resonance. 0 magnetic loop antennas. Remotely Tuned HF Magnetic Loop Antenna. The loop antenna will still tune properly. 5 to 14MHz ABSTRACTS u2013 2017 | 2018 by Marica Martella is licensed under CC-BY-NC-ND 4. 0 For Radio Amateurs wishing to use HF bands below 30MHz, the physical size and height above ground of conventional antennas can be a problem. I hope that this design helps further the popularity of magnetic loop antennas in the increasingly space-restricted home environment. Aug 4, 2016 · For a magnetic loop, it still requires a way to remotely adjust the tuning capacitor. The HG-1 Remote Tuner (Retrofit) The HG-1 Remote Loop Tuner is a compact, easy-to-use remote tuner for a Magnetic Loop Antenna (MLA). An MLA is a convenient and lightweight antenna. May 9, 2017 · If you are a radio amateur, you may be familiar with the magnetic loop antenna. The HG3 MLA delivers unprecedented capability, performance and convenience. When i tune my magloops i use a signal generator at the given frequency with an FM modulated tone, once tuned i then have a rotary switch to switch between a dummy load back over to the radio antenna. They require towers… Aug 31, 2020 · Manager Reviews Home Reviews For: PreciseRF HG-3 Pro Magnetic Loop Antenna Category: Antennas: HF Portable (not mobile) eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. 5 to 30 MHz using a full 150 Watts on sideband, CW, and digital. It is a very simple antenna. Suitable for installation height of 3m. This permits the antenna to be up to 12 feet from the operating position, such as on a balcony or deck, and enables precise automatic tuning of the loop. Efficiency, tuning ranges, and the innovative autotuning solution using a microcontroller are discussed, offering insights into Automatic Tuner for stepmotor controlled magnetic loop antenna. Accompanied by a detailed description, the 6-foot loop features a built-in stepper motor control circuit, while the 12-foot loop incorporates a separate loop controller. However, it also requires retuning quite often in order to stay on-band. The result is the HG3 MLA. MFJ-936C High-Efficiency Magnetic Loop Tuners use an internal, low-loss butterfly loop tuning capacitor and various lengths of user-supplied wire or coax to create high-Q tuned circuits used as multi-band transmitting loop antennas that match to your 50 ohm coaxial cable and will handle up to 150 watts on all operating modes without a For a magnetic loop, it still requires a way to remotely adjust the tuning capacitor. 0 -- Set Up and Use SUPPORT THE CHANNEL:more Mar 22, 2019 · In other words, you might have to re-tune the antenna via the variable capacitor even if you only move the frequency 5-10 kHz or so. See full list on hackaday. Magnetic Loop Controller for 4 Antennas: This project is for those ham amateurs who don't have a commercial one . Explore two magnetic loop antenna constructions, utilizing a 6-foot and a 12-foot square loop. This controller doesn't have endstop limit capabilities. The much smaller loop, called the coupling loop, connects to a For wider bandwidth modes like SSB, RTTY, SSTV, etc. Shop magnetic and wire/PVC frame small loop HF antennas and cross loop antenna kits at DX Engineering! High Efficiency, Multi-Band Transmitting Magnetic Loop Tuner Turn wire or coax into a small, high-efficiency multi-band transmitting magnetic loop antenna! Work the world from 3. Apr 9, 2014 · For a high-Q antenna such as a magnetic loop, an automatic tuner would make the antenna adjustment much more compatible with contest operations. Space-saving and robust. The AlexLoop HamPack Portable Magnetic Loop features quick antenna tuning on any frequency between 7 and 30 MHz. E. The ALRT will only work with the F-LOOP 2. The upgraded tuner with its large, precisely printed scale displays the range of frequencies and features a smooth, geared tuning control system. This permits the antenna to be up to 12 feet from the operating position, such as on a balcony or deck, and enables precise automatic Drape a wire around a bookcase or window; attach both ends to an MFJ 936B Small High-Efficiency Loop Tuner™ and they instantly turn into a small, multi-band transmitting loop antenna! Magnetic Loop Antenna Automated Tuner: Hello community - Dave here (radio callsign G7IYK), I am very pleased to publish details of my latest project which is a magnetic loop (ML) antenna automated tuner. Oct 25, 2022 · The F-Loop packed I thought I had posted an activation video using the F-Loop, but looking back I realize I have not. It is designed specifically as a retrofit for the popular preciseRF HG-1 MLA. Apr 5, 2024 · The HG3 QRO-B is the high-power version of the PreciseRF HG3 Stepper Magnetic Loop Antenna series. 0. It's easy to build with a soldering iron, a plastic case and a little knowledge of arduino. The Small antennas, including Magnetic Loop antennas, on the other hand, generally have very narrow bandwidth, and every time you move transmit frequency by a few KHz, you will need to re-tune to re-achieve the resonance. Magnetic Loops are naturally inductive so they are tuned to resonance by Capacitors Magloops are DANGEROUS with voltage around 5000 volts For highest efficiency, the conductor length for a small transmitting loop antenna should be greater than 1/8 wavelength To avoid self-resonance, the conductor length for a small transmitting loop antenna should be less than 1/4 wavelength Loops are best On 40m I have to tune at first by earing the noise popping up, then on low power on CW, but shifted if I want to tx on phone, as the antenna tuning is about 2. H. . semi-Automatic Magnetic Loop Controller1 - 20 of 42 1 2 3 The Loop Remote Tuner allows for remote tuning of the F-LOOP 2. Earlier this year I saw a very impressive magnetic loop design being used by a fellow radio club member, Henrik VK2HHS. A key characteristic of magnetic loop antennas is the very narrow bandwidth when tuned, so that if you QSY a few kHz you need to retune the loop. Presentation to the Richmond Amateur Radio Club Many articles and video segments have been produced to demonstrate the use of magnetic loop antennas for amateur radio use.   No ground, radials, or counterpoise needed. It’s different from most conventional wire antennas, taking the form of a tuned circuit with a very large single Magnetic Loop Antennas – a brief theory and a practical antenna for 3. When paired with a Barrett 4000 series HF Transceiver, the 4049 memory tune feature eliminates the need to retune an antenna after a channel change. The new HG3 plus controller is now the con-troller used with the HG3 EXPRESS, PRO, and QRO-B antennas. Before we get deep into the project, I intend to outline what a magnetic loop antenn… This project is a fully automated tuning system for a Magnetic Loop Antenna (MLA), designed to simplify and enhance the tuning experience, especially for high-Q antennas. A new version with more accurate readings from the bidirectional coupler. Tuning does not require transmitting! Magnetic loop antennas typically have a small negative gain when compared to a dipole. Chameleon Introduces an AUTO TUNER for the Magnetic Loop 2. Thanks, Carlos N2CSI More All Messages By This Member previous page View All 25 Messages In Topic next page previous page #89943 Reviews For: PreciseRF HG-1 Magnetic Loop Antenna Category: Antennas: HF Portable (not mobile) eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. 0 magnetic loop antennas in place of the standard manual tuning knob. Before we get deep into the project, I intend to outline what a magnetic loop antenn… Mar 17, 2019 · The magnetic loop design leads to antenna which is tuned to a very narrow frequency range, giving good selectivity. Band selection, remote tuning, including optional loop rotation, is controlled by a microcontroller driving a high Sep 18, 2025 · The efficiency of a magnetic loop antenna depends on several factors, including the quality of the materials used, the precision of the tuning, and the environment in which it operates. The prototype version works perfectly well with my IC-746, and I believe that it will work just as well on other similar, mid-range radios. io discussion group: loopController A Magnetic Loop Antenna is basically just a resonant circuit using an oversized inductor and an adjustable capacitor. The Magnetic Loop Antenna Magnetic loop antennas (MLA) are well known for their superior selectivity, low noise and high directivity. Will the tuner be available also for homebrewed units, also, you'll sell it as a kit or as a readfy made device? Will it be sold with your antenna , or separated? Jan 19, 2011 · I have been doing some research on building a magnetic loop antenna. 1 firmware works The controller described herein attempts to facilitate the safe and automatic tuning of a mag loop antenna by reducing the output power to an acceptable level via ALC control so the RF output circuitry will not be damaged when the line SWR is highr. 5 kHz wide there . The tuner is at the bottom, where the high voltages will be. This tuner is designed for remote automatic tuning of the CHA F-LOOP 2. Subject: [FT817] Re: Auto Tuned Magnetic Loop Antenna I'm about to build my own mag loop but my plan was to tune by ear for Jul 8, 2015 · The Small Do It Yourself Automatic Tune Magnetic Loop Antenna that he made is only 1 meter in diameter yet it has more or less the performance of a full size dipole - and has an amazing control box. The HG3 Stepper tuned Magnetic Loop Antenna delivers unprecedented capability, performance and convenience. Now you can place your HG-1 Magnetic Loop at a remote location, such as the top of your RV, away from obstructions, for better radiation efficiency and less interference. This permits the antenna to be mounted away from the operating position, such as on a balcony or deck, and enables precise tuning of the loop. io This tuner is designed for remote automatic tuning of the F-LOOP 2. When returning to a previously tuned channel, the transceiver sets the 4049 with a stored tuning result in less than 100 ms. The antenna consists of two loops, one within the other, interconnected by inductance. I built my first antenna (a half wave inverted v dipole), I am hooked and looking for another antenna project. A small magnetic loop antenna is relatively compact, easily portable, and does not have radials; it is directional, has some gain, and is suitable for use outdoors, and (within safe antenna proximity power limits) indoors or on a balcony3. Perfect coverage of the amateur radio bands 40-10m. The This is a short video showing how I've added an extra PCB to my multi mode controller and how the latest V2. But this makes the antenna very selective and sharp. Baby-Loop: Compact magnetic loop antenna for shortwave with adjustable capacitor. Pack which can easily hold the entire loop, folding tripod, and antenna analyzer. Proper design plays a big part in this. Introduction Thank you for purchasing and using the Chameleon AntennaTM Automatic Remote Loop Tuner (CHA ALRT). The Pro model supports a high resolution 2000-step stepper motor, manual tuning, external resonator, auto-tuning, antenna rotation and includes the integrated SWR bridge and ERP functions. It delivers unprecedented capability, performance and convenience for a remotely tuned MLA. 100 watt HF Remote Tuned Magnetic Loop antenna for 10-40 meters. To automatically tune a Magnetic Loop Antenna Back to main page PowerPoint style Presentation, Building Instructions and Firmware source code available at the bottom of this Webpage groups. “The circuit goes inline between the rig and the antenna and sends a gated broadband noise signal to the antenna using a directional coupler and a noise bridge. 0 / 3. Jun 3, 2020 · For Imediate Release Jun 2, 2020 Aurora, Oregon The HG3 Stepper MLA, our flagship magnetic loop antenna, is now available for sale. My concerns are mainly coupling and tuning. Eric implements a stepper motor to make tuning adjustments. Manager Reviews Home Reviews For: MFJ-935 Loop Tuner Category: Antenna Tuners/Matching Networks eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. The code is far from beeing perfect also the hardware is almost rudimentary, but works almost fine. This project is intendet to crate an automatic tuner for stepper motor controlled magnetic loop antennas and to learn programming the ARDUINO MEGA 2560. What sets the HG3 MLA apart is how it addresses many of the magnetic loop antenna’s shortcomings. This article describes a loop tuning system that automatically keeps my contest-band loops properly adjusted as I hop around each band making contacts. Perfect for ham radio, this MagLoop has remote tuning and exceptional performance. Minimizing losses in the loop and capacitor, as well as ensuring proper mounting and positioning, can maximize efficiency. 0/3. You can use a tuner with a magnetic loop MagLoop antenna, but turn your tuner off (or switch it to by-pass) when you tune the loop itself. Yesterday, I decided to pack the F-Loop in my larger Spec-Ops Brand T. I just wrote a little comparison vs. The setup consists of a Master ESP32 microcontroller that serves as the main controller, paired with a Slave ESP32 that manages the motor controlling the antenna's tuning capacitor. DIY - VA2SAJ - Build your Fully Automatic Tuner for ham radio magnetic loop antenna. The heart of the controller is the ESP32 microcontroller. It can be deployed quickly and is ideal for The HG3 QRO Stepper tuned Magnetic Loop Antenna delivers 1 KW power and unprecedented capability, performance and convenience. emlxpa mzxkh zjecfo cyrzpb wiuiu cktpd gnsgt pvptz jwhum mscrr cqq spdgt lnng gduij ujacs