The Mighty Rhombic is the "KING of Wire Antennas is a Rhombic". The ARRL & RSGB Diamond Logo is in fact, a Rhombic antenna.
K0UO is working on the "Lost Art of Rhombics" with four of these large wire antennas at the Kansas QTH beaming to the eight main DX areas, with phasing for more steering.
See my call on qrz.com then type in the call K0UO for more information and photos. Each Rhombic antenna uses over 1/2 Mile of 3/8" cable. They are erected on 100 foot wooden utility poles, also the site has two large Vee Beam antennas which are over 1200 foot long each. Build Them and the DX will Come!