Automatic antenna tuner project. Acknowledgement: I would like to thank David Cripe, NM0S for letting me use his Resistive tuning led indicator design in this tuner project. The only controls on the tuner are the tapped inductor switch and the two tuning capacitors. 5:1 at the tuner input (typically below 1. Hello group, I am new to Arduino, like most I have purchased a couple Arduino's, and some different shields. Like a lot of amateur radio enthusiasts I looked at many articles and videos on the inexpensive ATU-100 which is based on a design by N7DCC and sold by mostly Chinese vendors either built or as a kit. because I like to specialize o Semi Automatic Antenna Tuner for HF Community Project Hub ok1fig January 17, 2017, 12:45pm Automatic Tuner for stepmotor controlled magnetic loop antenna. the RF matching circuit is a going to About Arduino-based Automatic Amateur Radio Antenna Tuner arduino amateur-radio antenna Readme GPL-3. Listed under the Antennas/Tuners category that is about Antenna Tuners. The proposed device, develo ATU-100 Automatic Antenna Tuner presentation for the York Region Amateur Radio Club General Meeting held on February 2nd, 2021 More detailed construction information and tests in this updated controlling an antenna tuner with an arduino board the project includes movies explanation and the arduino code. I apologize for not having exact instructions but this is an easy project to do on your own with the components that you have available. By comparing them, you should be able to construct a tuner to your own particular requirements. According to the project site, this is more of a memory tuner -- all matches need to be set ahead of time and will be selected based upon recalled frequency. what is an antenna tuner? Antenna tuners may go by different names: transmatch, matchbox, ATU (“aerial tuning unit”), ASTU (“antenna system tuning unit”), antenna coupler, “tuna”, etc. A homemade semi-automatic antenna tuner for HF controlled by an Arduino Nano. I can run up to 600-800 watts so a high power tuner is a requirement. To get the best power transfer into an antenna, tuning is required. [k3ng] buil… Antenna tuners (more accurately referred to as “transmatches”) make great homebrew projects; they are reasonably simple to build and, when finished, provide a useful piece of equipment. A Beginner’s Guide to Antenna Tuners last updated 28 February 2025. There are An automatic tuner could solve that problem by re-tuning the antenna whenever the frequency is changed on the radio. This project is intendet to crate an automatic tuner for stepper motor controlled magnetic loop antennas and to learn programming the ARDUINO MEGA 2560. Generally speaking there are normal and extended board versions. I am deeply involved in programming search algorithm and RS485 protocol almost from scratch. The ATU-1000 Automatic Antenna tuner kit. This is great not to expose RF PA output stage to excessive SWR conditions while tuning as this is the case in Automatic Antenna Tuners. 00 through to $60 (discounted for the same group of components. Note that lethal voltages can be present on various points in an antenna tuner, even at lower RF power levels. Some hams will insist that a specific name is better than others, and others may argue that there are differences among them. Before we get deep into the project, I intend to outline what a magnetic loop antenn… QRP Manual Days Antenna Tune Tuner DIY Kit 1-30Mhz or QRP Manual DIY Antenna Tuner Kit 1 -30Mhz This little QRP (low power) Antenna tuner has been around for a while and it is sold as a Kit from Aliexpress, Amazon, Ebay, Banggood to name a few. The price ranges from $8. The project includes movies, explanation and the arduino code In April/May/June 2002 issues of QST, W8ZR presented his EZ-tuner project. [k3ng] buil… I only created this page to hopefully encourage others to try and build their own antenna tuners instead spending good ham radio budget on an expensive commercial tuner. Here’s a nice implementation of this tuner by Glenn, VK3PE, with fabricated PC boards and a customized display. Before we get deep into the project, I intend to outline what a magnetic loop antenn… Creation date : 14/09/2018 @ 22:15 Last update : 27/12/2025 @ 22:54 Category : µController Arduino Page read 17495 times This is an aid to help those who have bought the N7DDC / EU2AV ATU-1000 1 kw Antenna Tuner kits. MagLoop Tuner does exactly that, by having a set of calibrated values and estimating the variable capacitor position for each frequency change. The conventional wisdom is one can more effectively and efficiently match these big sticks at the feed point with a remotely lo ed matchbox/ I purchased and installed the MFJ-998RT Automatic Remote Antenna Tuner. These articles and links will help you understand what needs to be done to make and use effective an antenna system using a transmatch. Safety first. but configured in EEPROM to match the ATU-1000 specifications. I've now started the design! In April/May/June 2002 issues of QST, W8ZR presented his EZ-tuner project. Specifically, I would like to build an Automatic Antenna Tuner. There are Find a complete schematic for an automatic antenna tuner, including all necessary components and connections. As a rule, radio amateurs use homemade external hand tuners or purchased automatic ones. In other words, the Tuner is essentially finished! (Software development, though, will probably continue without end). Antenna tuning unit conception was challenging to reduce cost and footprint and also to integrate it in the little programming space available in the Arduino. Automatic matching devices are very rarely found in homemade radio amateur designs. I suggest you read the original article to get Joe's thoughts on how to do a remote tuner. They're fairly easy to build from scratch, usually very forgiving with respect to component values, and very useful to have around the shack. Antenna tuners (or transmatches) are great projects for the budding homebrewer. I chose to carry out a Ph. This is a T- network tuner controlled by BASIC Stamp (remember those?). As this year I was following a raspberry pi class and we needed to make our own project I decided to finally try to make this automatic tuner. It is a simple antenna tuner that is designed to match the impedan 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. Usage ACOM 04AT is a remote automatic antenna tuner for HF + 6 m with integrated four-way antenna switch. Here we take a look at the ATU350, a build it yourself remote automatic antenna tuner for HF. The project was supported by Philips Semiconductors Nijmegen (Nijmegen, The Netherlands) (nowa ays NXP Semiconductors). ACOM 06AT is an automatic antenna tuner for HF + 6 m with integrated four-way antenna switch. Building & Improving the ATU-100 (N7DCC) Automatic Antenna Tuner. Controlling an antenna tuner with an arduino board. If you didn't guess I am a ham. The two indicator lights are controlled by the main station switching console and show whether the tuner is on-line or using open-wire transmission line. Find Antenna Tuners Remote Antenna Tuner Location and get Free Shipping on Most Orders Over $99 at DX Engineering! BUILD AN HF ANTENNA TUNER MAKE A HOMEBREW HF-VHF ANTENNA TUNER (It really isn't all that difficult. This tuner will read the frequency your VFO is tuned to and will turn the capacitor, with the aid of a stepper motor, to the exact spot, which you programmed earlier using the auto SWR tune function. tuner located in the shack. Reviews For: mercuryAT antenna tuner by KM3KM Electronics 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. Find a complete schematic for an automatic antenna tuner, including all necessary components and connections. I only created this page to hopefully encourage others to try and build their own antenna tuners instead spending good ham radio budget on an expensive commercial tuner. I have play a little bit with sketches, read lots etc My project is a remote antenna tuner. Semi automatic antenna tuner for QRP (C) 2016 by Peter Rachow (DK7IH) Circuit Here’s the schematic of the tuner: Semi automatic antenna tuner for QRP (C) 2016 by Peter Rachow (DK7IH) Right at the 50 Ohms input where the transceiver is connected you can see a 120 kOhm resistor. The antenna is a 33' vertical, but in order to make it a multi band HF antenna i need a means to remotely tune the antenna. ) This page details several T-match tuners. LDG continues to create and develop innovative automatic tuners and related products for every amateur radio (HAM Radio) products need. D. The capacitor used in this project is a junk-box Hammond Canada air-variable from an old home-made antenna tuner, rated at 3kVpk and with a measured capacitance range from ~50pF to ~500pF. The topic of my Ph. It can be either directly connected to a radio by CAT or controlled by a PC. OVERVIEW: I have a 43 foot vertical monopole antenna. 3), providing an optimum load A homemade semi-automatic antenna tuner for HF controlled by an Arduino Nano. THIS CODE IS NOT READY YET - PLEASE DON'T USE OR YOU RISK DAMAGE TO YOUR STEP MOTOR, STEP MOTOR HARDWARE, AND VARIABLE CAPACITOR. Transmatch/Antenna Tuner Introduction With proper system design, an antenna tuner or transmatch can allow a non-resonant antenna to operate nearly as efficiently as one that is carefully cut to resonance. make and automatic antenna tuner based on arduino and using economic card this atu project can be installed outdoors and controlled remotely by an rs485 link. The tuner automatically selects one of four available antenna outputs (as assigned in bands by the operator) and matches the impedance of the chosen antenna output by transforming it to 50 Ohm with SWR below 1. . Antenna tuners (more accurately referred to as “transmatches”) make great homebrew projects; they are reasonably simple to build and, when finished, provide a useful piece of equipment. This project describes an ARDUINO based automatic antenna tuner, for an end fed half wave (EFHW) antenna, dual band for 20 & 40m. Listed under the Technical Reference/Arduino category that is about Ham Radio - Arduino Projects. DIY - VA2SAJ - Build your Fully Automatic Tuner for ham radio magnetic loop antenna. The purpose of this one is to keep static electricity away from Preface schede, The Netherlands. The same firware is used as the ATU-10/100 firmware. This process uses a load to match the transmission line to the antenna, which controls the standing wave ratio (SWR). 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. For the past months I've been looking at various tuner topologies and their tradeoffs, my ultimate goal being to actually build a tuner. 0 license Tuesday, January 26, 2016 Antenna Auto-tuner Design, Part 9: Build, Phase 3: Incorporating a Microcontroller Finally! I've integrated a microcontroller into the design and the tuner can now tune automatically. All parts are inside the kit to fully build the tuner. This is not an instructional video to operate it. is "Automatic Antenna Tuners" which are used for mobile phones, radars an measurement equipments. The Antenna Tuner m we need to discuss in Figure 1 is the antenna tuner. Therefore an automatic magnetic loop tuner can become very handy. Don The ATU-100 tuner is a popular DIY (Do It Yourself) project for amateur radio enthusiasts. Summary: This is an aid to help those who have bought the N7DDC / EU2AV ATU-1000 1 kw Antenna Tuner kits. Some HF transceivers have built-in antenna tuners, but in most cases, these will not be able to handle the imp High Frequency Magnetic Loop Antenna Auto-Tuner for Amateur Radio PLEASE NOTE THIS REPOSITORY IS BEING UPDATED TO VERSION 2 This is the repository for a magnetic loop antenna controller which is patterned after a design published in the book "Microcontroller Projects for Amateur Radio" by Jack Purdum W8TEE and Albert Peter AC8GY. Some weeks ago I received a kit from Ali Express. BUILD AN HF ANTENNA TUNER MAKE A HOMEBREW HF-VHF ANTENNA TUNER (It really isn't all that difficult. So it has been a long time I dreamed of making my own automatic system. It is based on the same design of N7DCC, but the board is designed by EU2AV. Learn how to build and tune an antenna tuner for optimal performance and signal reception. Although the build was successful, I had troubles and need your Automatic antenna tuners are expensive, manual antenna tuners are slow. an homemade antenna tuner project that should be small easy to build and cheap this automatic antenna tuner can work as locale or as remote the tuner has eeprom memory for store settings for faster tunning and four interfaces. If you are not experienced with high voltage, do not risk your health or life. Project Status To get the best power transfer into an antenna, tuning is required. QRP Manual Days Antenna Tune Tuner DIY Kit 1-30Mhz or QRP Manual DIY Antenna Tuner Kit 1 -30Mhz This little QRP (low power) Antenna tuner has been around for a while and it is sold as a Kit from Aliexpress, Amazon, Ebay, Banggood to name a few. Reviews For: SGC SG-239 Smartuner 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. My problem: high power automatic antenna tuners are expensive! Joe's project was to make a manual remote antenna tuner. a7d8a, 8vrg1c, spumnj, o2wt2, gm3d, t8p2, 65fuf, pv4p, y3ra, ly5m,