So many of us just did Field Day a week ago and the ongoing debate of BPF has poked its head.
Are they needed? Yes and No - like many of us at the DXpedition Planning debate yes for that case due to close antenna configurations. Then you have some FD 10A simply stating the simple response I give…antenna placement and if using dipoles…hot side not pointing at other antennas. If the “hot side” confuses you don’t worry even a “Engineer” from Huntsville did not know.