I also had the du3500al automatic tuner and was unable to get it to read the frequency from any of my radios at the time flex 6500, yaesu ftdx5000mp and kenwood ts2000. Doing it prior to modeling is just taking a shot in the dark. For a highq antenna such as a magnetic loop, an automatic tuner would make the antenna adjustment much more compatible with contest operations. A better antennatuner balun by andrew roos zs1an qex september 2005 pp 2934. The end of the antenna is resting on the fence at about 1. Match your transmitter or transceiver to virtually any antenna with antenna tuners from dx engineering. Automatic antenna tuners lamco barnsley ham radio shop. Ft2000d this tuner will work with most radios, but it does require a jumper to be moved inside the tuner and purchase of a cable specific for that brand of radio. The mfj921 is designed to match a wide range of impedances for both mobilebase operation. Applications and benefits mt97x, mt98x and xt98x series automated tuners also known as automated impedance tuners and automated load pull tuners are precision instruments that are optimized for a broad class of infixture and onwafer applications, and may be used in any automated or manual application requiring the ability to match the impedance of a microwave circuit element or to. Can be interfaced to hfwin32 propagation prediction software. To make it distinctive from other types of atus, i call my design smatch.
Jpole antenna is pretty easy to build and usually designed by amateur radio operators through this software, you can easily find out four important parameters to build this antenna namely, radiator length, driven stud length, gap space, and feedpoint. At615b automatic remote tuner for balanced feeders twin. Jun 27, 20 alinco edx2 automatic antenna tuner tuner coupler duration. Has anyone published all the details including source code. Homebrew semi automatic antenna tuner for hf duration. Made for qro hams, it will handle 1,000 watts ssb or 500 watts fmdigital from 1. It is unsurpassed in its degree of automation and level of. Automatic antenna tuner ham radio antenna, electronics. I realize you need heavy components to be able to do the thing you need to do inside of this tuner. The ldg design uses banks of fixed capacitors and inductors, switched in and out of the circuit by relays under microprocessor control. Codans 9350 antenna is designed to be used with transceivers that have a large channel capacity. Connection via control cables to icom, kenwood, or yaesu transceivers for control of the tuner from the radio front panel.
This blog post describes design and implementation of this final block. A balanced balanced antenna tuner qst february 1990, pp. Antenna tuner, matching network, matchbox, transmatch, antenna tuning unit atu, antenna coupler, and feedline coupler are all equivalent names for a device connected between a radio transmitter and its antenna, to improve power transfer between them by matching the specified load impedance of the radio to the combined input impedance of the feedline and the antenna. The tuner is a tnetwork, high pass tuner with variable capacitors in the series legs and a roller inductor in the shunt leg. What i have been thinking about lately is using an ad8302 phasemag detector similar to what you did in the vnarduino but in this case the arduino could calculate the values needed for a conjugate match for the antenna and then switch in the relays to deliver this value in one step. The ldg at100pro in 1995 ldg pioneered a new type of automatic antenna tuner. A better antenna tuner balun by andrew roos zs1an qex september 2005 pp 2934. The mfj929 intellitunercompacttm lets you automatically tune any coax fed or random wire antenna 1. Recommendations on automatic antenna tuners that works. Instead of using link coupling to the antenna, his design uses capacitive coupling to the main coil. The 3040 automatic whip antenna is a low profile antenna, providing a mobile antenna solution for all codan high frequency radios. The palstar hfauto 1800 watt automatic antenna tuner covers 160 to 6 meters with a power rating of up to 1800 watts pep. The ldg at200pc in 1995 ldg pioneered a new type of automatic antenna tuner. A tuner for 2m is about the same as a tuner for any other band with component sizes adjusted to give the right range of impedance matching.
Hams have enjoyed the benefits of low power autotuners for years, but now palstar takes it to the next level and offers. It sounds to me that you are building a great antenna tuner. The project objective is to develop a microcontrollerbased automatic tuner for a fixedlength dipole antenna. The problem i had with tuner mark 1 was only on 160 metres. Ldg makes a full line of baluns and ununs that allow you to use antennas fed with ladder.
In implementing the atu, two different types of tunable. These include the design, fabrication, and measurement of the electrically tunable antenna, impedance synthesizer, rf power sensor, and analog and mixedsignal. Antenna raised in a v shape with the balun box at ground level and the antenna supported about of the way down on an aluminum mast approximately 8m off the ground. Alpha 4040 automatic antenna tuner alpha rf systems.
Since the tuner will be automatically tuned, the capacitors and inductor are controlled with motors. At615b automatic remote tuner for balanced feeders. You can use an l, t or pi network, to mention the most common. This site is intended toaccompany the threepart series of qst articles on the eztuner from the april, may, and june, 2002 issues, and the writeup in the 2003 edition of the arrl radio handbook. The automatic tunability of the frequency selective antenna is achieved by a closedloop automatic antenna tuning unit atu. It is used to design jpole antennas for the desired frequency. Antenna tuners, the components in them, and your antenna system are all composed of reactive elements. A single wing nut antenna connector is on the tuner rear. Automatic antenna tuner for ham radio application motivation i spent a whole group of money on a log periodic antenna which according to its specification, was to have a maximum vswr of 2. The system is intended to accommodate balanced antenna systems transmitting. It has an eggshell white and black aluminum cabinet. Ldgs generic tuners work with almost any transceiver or transmitter.
The palstar hf auto 1800 watt automatic antenna tuner covers 160 to 6 meters with a power rating of up to 1800 watts pep. The device is a low pass filter tuner manually tuned by setting the optimized lc combination by hand and then storing the values into the eeprom of the mictrocontroller to recall them later seperately for each band from 80 to 10. Making this atu was a good learning path either on hardware and software aspects. The tuning will be quite sharp so you may wish to design a remote tuning feature for the variable cap. The l matching network is a classical design in amateur radio. First, it measures the swr of the line by using a tandem match coupler. Diy electronics electronics projects arduino home automation radio shop simple arduino projects ham radio antenna electrical projects software electronic engineering arduituner this project describes an arduino based automatic antenna tuner, for an end fed half. Mobile ham radio radio astronomy ham radio antenna hobby electronics digital radio internet radio qrp communication software these revisions work on all.
Automatic antenna tuners radio ham radio ldg mfj lamco my favourite hamstore barnsley 01226 361 700 uk south yorkshire. Ivcad advanced measurement and modeling software mt930 series ats automated tuner software mt993 series iqstar circuit measurement and analysis software iqs series mmwstudio mmw and subthz characterization software mt920 series amts automated mobile test software mt910 series mixedsignal active load pull system mt and mt2000 series automated tuners. Having had a gem quad hf 201510m for a few years, back in the early 80s, i can testify to the quads slight advantages over a tribander yagi with the same number of elements. Hello, i am in the middle of putting together a station and in need of some advice. Hams have enjoyed the benefits of low power autotuners for years, but now palstar takes it to the next level and offers autotuning with a power rating of 5 watts to 1800 watts. Once you have modeled the antenna to determine its complex impedance, then the balun and antenna tuner can be configured to match. This device allows the forward and reflected signals on the line to be extracted. It is unsurpassed in its degree of automation and level of protection.
Semiautomatic antenna tuner project thsi article describes a microcontroller driven semiautomatic antenna tuner capable of handling power levels up to 150 watts. Since reactance changes with frequency, a match is only perfect at one frequency. Software development, though, will probably continue without end. This smoothly operating tuner would be an appreciated. In case you didnt read the articles, the eztuner is a homebrew automatic legallimit antenna tuner that covers all amateur hf bands from 16010 meters. Speed up band changes with this legallimit auto tuner. Ldg desktop tuners are perfect for your home shack, but can also be used portable or mobile if the need arises. The mfj939y4 comes bundled with the mfj5114y4 cable and works with the following yaesu radios out of the box. 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. Mobile ham radio radio astronomy ham radio antenna hobby electronics digital radio internet radio qrp communication software these revisions work on all flex 1500, 3000, and 5000 sdr ham radio transceivers. Automatic antenna tuning unit in this section, we discuss the major issues in atu design. Even though this is an unbalanced tuner, there is little point using an unbalanced output coax. Many of ldgs pro series of tuners will work with the ft991a radios as a standalone tuner.
Arduino antenna tuner through ethernet and powermate duration. The 3040 has a combination of fast tuning, compact form factor, and rugged construction, all contributing to a state of the art mobile antenna tuner product. I found the qst article on the switched automatic tuner at ldg sold at11. The 04at is acoms 1200 watt automatic antenna tuner, designed to complement their 600s and 1200s solid state hf amplifiers.
There are several loop modeling tools on the internet. The parts count of this idea was as low as it could get. Ive integrated a microcontroller into the design and the tuner can now tune automatically. At502 automatic remote controlled rf antenna tuner 200 watts for random length dipoles or loops 1. The antenna tuner has so239 inputoutput connectors, wing nut post ground. The automatic antenna tuner described here is the first part of automating my station so i can run it remotely. I have a palstar hfauto tuner and use w1tr programs to send the operating frequency from the radio to the tuner and it works very well. Jan 06, 2014 k3ng built his own automatic antenna tuner. Where can i find some good articles web sites on theory, practical design, and tuning algorithms for the switching circuit. Jpole is a free and portable antenna design software for windows. I have been collecting parts to make an arduino based tuner also. On 160 metres space limitations mean my antenna simply isnt high enough to have a reasonable pattern to work dx but thats not of concern to a tuner. These include the design, fabrication, and measurement of the electrically tunable antenna, impedance synthesizer, rf power sensor, and analog and mixedsignal control circuitry.
Semi automatic antenna tuner project thsi article describes a microcontroller driven semi automatic antenna tuner capable of handling power levels up to 150 watts. No ldg automatic antenna tuner local or remote type will autotune by pressing the tune button on any yaesu transceivers front panel. Whether you have a balanced, unbalanced, or singlewire antenna, our antenna tuners offer impedancematching capabilities for more efficient power transfer. However, a tuner at the rig wont help with your swr on the transmission line and at vhf thats usually where the losses are the worst.
It worked very well at everything from 80 metres to 6m and i used it for some time on all bands between. Automatic antenna tuner n4spp ham radio, ham radio. After an extensive research and experimenting i achieved the design shown in the above drawings of the balanced universal atu system. Automated tuners impedance tuners load pull tuners mw. To tune the antenna to the selected frequency must first.
Different models handle rf power levels from 100 to watts. In high frequency transmission lines, an antenna impedance mismatch causes power reflection back to the transmitter. Mfj926b automatic antenna tuner covers the entire hf band and will match a random wire or coaxfed antenna 1. Automated tuners impedance tuners load pull tuners. A tuner is only suitable to two types of antenna viz. Two dualsection air variable capacitors 470 pf per section. Choose from manual and automatic tuners in a wide variety of power outputs from 200.
The mat40 is an outdoor weatherproof longwire and vertical wire tuner. The balanced tuner must convert the unbalanced antenna inputoutput of the antenna to a balanced 50 ohms and then drive it through an impedance transforming network to the antenna systems impedance at the end of the open wire feeder. The at11 this easytobuild, fully automatic tuner makes timeconsuming knob twisting and roller cranking a page in your stations history book. This article describes a loop tuning system that automatically keeps my contestband loops properly adjusted as i hop around each band making contacts. Antenna tuners match the impedance of your antenna system to the impedance of your transceiver. And so i decided to design the antenna tuner on the basis of selected, previously known to me a simple diagram of the antenna box. Hams have enjoyed the benefits of low power auto tuners for years, but now palstar takes it to the next level and offers auto tuning with a power rating of 5 watts to 1800 watts.