For your curious pleasure and delight, here's a headphone amp from the 1940s. The Setchell Carlson 524 Beacon receiver was used for military aircraft. I suppose the pilots may have been bored during some of the long flights and wanted to rock out on some tunes. Anyway, enjoy the history and the sexy naked amp pics.
Edited by Spareribs - 8/18/12 at 8:53pm