The Folded Dipole is not used much amongst Radio amateurs, probably due to the fact that this antenna uses twice as much wire as a single-wire dipole.
Ham Radio 20 / 40 meter short Coax Trap dipole antenna designed with the coax trap design calculator program
An home made QRM Eliminator project based on the WA1ION original design, used to remove QRN generated locally by an halogen lamp in Dutch
A project with several releases, of the Qkiller or QRM eliminator original project by DK9NL, in italian with schematics, picturs and movies
A collection of drawings of most popular wire antennas for hf ham radio bands
Amateur radio kits online shop, includes Mini Touch Key, QRP HF SSB and CW transceiver kits
A power line noise eliminator designed to eliminate QRN expecially on 40 meters band.
A page describing all element of a weather statio for NOAA weather satellite image reception
A combination of two rotating broadband magnetic Alford loops is a powerful means for getting a better short-wave reception.
An improved version of DK9NL QRM Killer, with dedicated noise sampling antenna for completely filtering of plasma TV rattle on HF bands