I have an Icom A24 radio which transmits a horrible squeal when used with an external mike (my Comtronics helmet). Apparently I'm not the only one with this problem, and I'm experimenting with shielding etc. (advice welcome), but it may well be that the only real solution is an external antenna, far from the mike. Anyway, I know an antenna is a relatively simple thing to make, but I don't know too much about the specifics... any pointers to homemade antenna info would be appreciated. This is to mount on my Kolb Ultrastar, so the mounting and ground plane have to be able to coexist with the fact that I fold/unfold the wings every time I fly it. -Dana Refuse Novocain... Transcend Dental Medication.