R. G. Wells - The transcript of an interview with Lieutenant Colonel R. G. Wells, who built a rather elaborate set out of scrounged and improvised items while in a POW camp during World War II. Provided by the Centre for the History of Defence Electronics (CHiDE). - http://histru.bournemouth.ac.uk/CHiDE/Oral_History_of_Defence_Electronics/r_g_wells.htm
Building A Crystal Radio Out Of Household Items - Several simple radio receiver projects, including the razor blade "foxhole" radio, that use found materials. Well illustrated with closeup photographs. - http://scitoys.com/scitoys/scitoys/radio/homemade_radio.html