It features a signal 1 to 2 S units better than a dipole and 2 to 3 S units over 1/4 wave vertical antenna. Its inverted L or V installation is impacted very little by height above ground Quick "tuning by ear" makes portable operation easy and quick Since it is end fed, its installation for portable operation is easy, only a single wire must be installed over a tree in the shape of an inverted L or inverted V The Fuchs antenna has many great features:ĭue to a high-Q LC circuit, the Fuchs antenna is optimally tuned to 50 Ohms coax and hence has high efficiency of Reports and has achieved longest distance of QSO: ///sota/wsprviz2/?p=20170702_gurten_40mĪntenna on test with Fuchs Resonant Antenna Tuner is antenna marked as "G". Images on this web page show that Fuchsantenne got largest No. Link to this test is here: ///t/seven-sota-antennas-compared-using-wspr-on-a-summit/15635 According to this test only Fuchsantenne made a QSO longer than 2000 km. With a help of QRP ATU a single half wave length long wire becomes a very effective portable antenna.Ĭheck Test Report of 7 antennas, among them was also our Fuchstantenne. However, due to their design, those antennas do not have all the advantages (narrow bandwidth and High Q) of the Fuchs antenna.Īfter several years of testing the Fuchs antenna on base and portable stations, we believe we have found the ultimate portable antenna that works great, is easy to install and the distance from ground does not have huge impact. Today's commonly known End fed antennas that are advertised and sold around the world are implemented with one wideband transformer, which does work. A narrowly tuned antenna also functions as a preselector.Īnother good feature of the Fuchs antenna is that it is easily pulled across trees and its performance does not vary much with respect to distance above ground in contrast to dipole or inverted V antennas which are commonly in use by SOTA operators.įurther, it has reception 1 to 2 S units better on DX than a dipole with less received noise. Below are the Pin connections details between RF receiver and Arduino. The LEDs are shifted based on the potentiometer values received by the receiver. The circuit diagram for RF receiver using Arduino Nano is shown below. But this is actually the advantage of the Fuchs antenna, because when tuning the antenna, the operator can hear an increase in signal volume and must not make a SWR measurement. VCC of Arduino third pin of the potentiometer. The Fuchs antenna has not been used much mostly due to the fact that it has very narrow bandwidth and needs to retuned every few kHz, something most ham operators do not like. The higher the Q, the higher the efficiency of the antenna. The resonant circuit should have high Q, which especially impacts the coil selected. I do own an HX-711 amplifier but for a firmware purpose i need an analog output instead of the digital one supplied by the board mentioned before. It's in the shape of an inverted L, the length of the radiating element is half wave length long and it is fed through a resonant circuit. Hello all, I m working on a project which involves a load cell. The Fuchs antenna has been known for many years. This tuner is QRP version, max 10W RF allowed.Įach Tuner comes with it's measurements performed on Mini VNA as seen on images. This Tuner will work on 40, 30 and 20m bands with half wave length long piece of wire. To use it connect half wave length long piece of wire to red socket. Enclosure is CNC cut and engraved from copper clad laminate that is electrically connected inside so that virtually no interference can interfere with tuner components. A curation of the 30 most engaged ham radio links published on The DXZone during this year.Resonant Fuchs antenna Tuner consists of 1 piece assembled Tuner as shown on images. Arduino automated antenna switch, CW Keyer, Automatic Antenna Tuner, RF PWR and SWR Meter, APRS Tracker, Beacon Controller, antenna switch, Rotator Controller, Arduino as an SDR. This link has been featured in the following Articles:Ī selection of the best amateur radio projects based on Arduino. So far received 11 votes for a total score of 7.76/10 This link is listed in our web site directory since Friday Apr 24 2015, and till today " Arduino automatic antenna tuner" has been followed for a total of 5696 times. The main category is Ham Radio - Arduino Projects that is about Arduino Projects for Ham Radio Applications. The resource is currently listed in in a single category.
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