Re:MacGyver a Powered Transmitter? (Score 1)

Given the aforementioned materials one can build a battery (hell it's been done with urine). Once you've got a power source you build a spark-gap transmitter, and use it to transmit SOS. When the press interviews you upon your arrival back in civilization, attribute your escape to the solid, scientifically grounded education foisted on you by your parents. Don't ever, ever, admit to having read either Murray Leinster's "Exploration Team", or Harry Harrison's "Deathworld 2". >;-{>