I whipped up a 5/8 wAve gp for 11 meters this weekend. Its an upgrade (hopefully) from my 1/2 wave verticle dipole. Its about 15-20 ft offbthe ground at the base. It is hidden in a pine tree for now with future intentions of raising it up another 15-20 ft. Its made from about 15' of 1/2" copper pipe i ripped out of my basement for a remodel. Match ring is a 6' copper3/8 tube also from basement. The top of antenna is alum rods from an old tv antenna and are slipped into the copper so they are adjustable in length. Radials are 12 guage braided copper wire jacketed, 3 of them 103" long. I have got swr down to 1:3 So far reports are excellent and made a bunch of am skip contacts last couple days, more than before, so i think its annofficial upgrade. Even thou im sure there is some interfierance from the pine tree. It is not grounded yet and im wondering what to use for grounding and will it affect performance if i run the ground wire from the area where radials are attached. From the reading ive done it seems this will now become part of the antenna with current flowing on it.