As it suggests, the problem I face is to how I carry about an earth connection (for an AM radio transmitter set I made) instead of burying it into the ground? Of course, if I make a radio set, I simply can't carry it about making an earth connection into the ground. I have provided a solution to this problem, but seems ineffective: to bury the ground wire into an earthen pot filled with soil. Does anyone have any other practical solution to this? By the way, is an earth connection really required for the radio I am making, at this http://sci-toys.com/scitoys/scitoys/radio/am_transmitter.html" [Broken]? In fact, if I remove it, will there be any harm? I suppose the range will become shorter, but the transmission distance I require is only two or three metres at the longest. So does that mean I can remove the earth connection?