Art wrote:
"But ham radio and the Navy have proved him (Terman) wrong with T2FD
testing."

Art has likely tried a VHF or UHF antenna by rotation within a linearly
polarized wavefront. If so, he has experienced cross-polarization and
noted about 20 dB loss when cross-polarized in the field.

My WW-2 navy ship used a Marconi (inverted L) antenna for HF
communications with a Collins TCS. A signal reflected by the ionosphere
gains random polarization in the process. The vertically polarized
Marconi does well with a ground wave over short distances even at HF
over sea water. We had no slopers. The VHF and UHF antennas were all
vertical whips to cover all azimuths. Art`s inclined antenna is in
general a myth.

For rntertainment, we had a broadcast receiver called the RBO. It too
used a Marconi antenna as all medium wave broadcasts are launched from
vertical antennas. It worked well as would be expected of a broadcast
receiver.

Best regards, Richard Harrison, KB5WZI