Someone asked my opinion about a scene in the movie, We Were Soldiers, where the RTO ginned up a doublet antenna for an AN/PRC-25 and copied a firefight in Viet-Nam into the American south. Could it have been done? The PRC-25's were FM at about 5 watts and in the 6 Meter band IIRC. In 1964, about the time of the events, the solar cycle was bottomed out but Sporadic-E propagation is seasonal and not dependent so much, if at all, on the solar cycle. Sporadic-E is the most common DX mode for 6 Meters. The best I've done on 6 Meters was about 5K miles to Uruguay at about 8 watts into a dipole variant. This was single sideband mode-more efficient than the FM PRCs. I've heard claims for trans continental with 5Watt FM handhelds so maybe it's possible. Any old RTOs out there have similar stories?
Tis a puzzlement
73 de Rob