Here some information about my amateur radio rig. The photo above is a three element shortwave antenna mounted on an aluminium telescope mast. The single quad elements are full size for the 10, 15 and 20 m band and fed from the bottom with a 75 Ohm quarter lambda coaxial transmission line. For 40 m I am using an attic mounted shorted dipole (8 m) underneath the pediment. Transmitting power is 100 W from an ICOM IC-7410.