My interests within the hobby are more concerned with the nuts & bolts of circuitry used in the equipment.   AERIALS  are another area of interest, and I am constantly adapting/altering/ trying out different configurations of aerial  I've found that the best MULTIBAND AERIAL  is the INVERTED "L" but with an extra 30ft  bit at the far end  forming a "sloper" against the metal mast.  And---yes! Its an END-FED wire, but Ive never had any problems with that on TX or RX---perhaps I'm lucky!   Ive worked Japan/Aussie/Far East as well as USA/ Brazil/south Africaon this Aerial in PSK31 mode using maximum power of about 60watts. I normally use about 30-40W. My inverted "L" is fed by an auto-tuner mounted at ground level in the back garden. The coax is RG213 which then comes into the house to upstairs "box" room which is my Radio-Shack I have several radial/counterpoise/ground wires running along the ground from the earth terminal of the auto-tuner The longest is 65ft  this system works well for me, including 160m band. The TOTAL length of the inverted-L wire is about 120feetThe horizontal span is 55ft.(the length of my back garden) The Rigs are  Icom 756 pro III   and Icom 7400.  My pet hates  are those Contesters who flout the BANDPLAN  (and they are usually RTTY stations) To the annoyance of other Hams, they transmit almost anywhere they please! It has to be said, however, that they are usually Operators outside the UK.I do not normally send QSL cards except where I receive one via the post and I will return the courtesy.de GW0GHF).23/10/2010.