The Fuchs Antenna was introduced by Arwed Fuchs, an Austrian Radio Amateur in 1928. It was used as a high efficiency single band half-wave endfed antenna by many radio amateurs over a long period, but it was more or less forgotten when most radio amateurs started using coax-fed dipoles. In the 80s, some Swiss OMs rediscovered the Fuchs Antenna Tuner, especially for portable use. In 2000, Frank, DL7AQT, did lots of experiments with the Fuchs, and was happy to end up with a multiband version for portable use. QRPproject is now proud to make the Fuchs Antenna Tuner available as a kit. It is based on Franks’ design with some small modifications we made because the variable used by Frank is no longer available.
The QRPproject Multiband Fuchs
is basically a half wave antenna. It can be used with good results at the original frequency and also at all harmonics. It is fed by a parallel circuit with inductive coupling.