Hi Ted, > 1/4 wave groundplane ok for VHF. Gets a bit difficult for > HF on grounds of size. On HF its hard to beat the dipole cut to the > frequency you most often use, but will receive all=20 > frequencies especially > with an aerial tuning unit. I agree.=20 Only now I realised that you were talking about HF antennas.=20 I am too stuck to VHF w.r.t. ACARS, I guess. -Sami