Just found a short Youtube QRP video which is quite fun. It's of the radio side of Thor Heyerdahl's cross-Pacific Kon-Tiki raft expedition in 1947, operating /MM with 7 watts. I found a longer description of what they had and what they did - including a thrilling tale of drying components on coral reefs while they desperately tried to make contact having washed up on an island - but not of the unusual parrot incident with a hydrogen balloon-lofted antenna during the voyage. That's only in the video.
It's all gripping adventure radio stuff, and shows what HF and a bunch of tubes could do before the digital satcom age.
The video's here - https://www.youtube.com/watch?v=qEvM4HxQxSQ
and the write-up (excerpted below) is here - http://www.arrl.org/news/last-surviving-crew-member-of-i-kon-tiki-i-expedition-passes-away
"The expedition used call sign LI2B and carried three watertight radio transmitters. The first operated on the 40 and 20 meters, the second on 10 meters and the third on 6 meters. Each unit was made up entirely of 2E30 vacuum tubes providing 10 W of RF input. As an emergency backup, they also carried a German Mark V transceiver originally re-created by Britain's Special Operations Executive in 1942. Other equipment included a hand-cranked emergency set of the Gibson Girl type for use on the maritime bands, a special VHF set for contacting aircraft and two British Mark II transmitters. The Kon-Tiki also carried a National Radio Company NC-173 receiver. Dry batteries and a hand-cranked generator supplied the power."
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