[Milsurplus] Foxhole Radios

[Glen Zook]

Make sure and use a heat treated blue razor blade and not one of the newer painted blue blades.  Big difference!

Glen, K9STH

Website:  http://k9sth.com


--- On Wed, 7/21/10, Ralph Cameron <ramcam at magma.ca> wrote:

As a current project our local Vintage radio club is going to try and  characterise some materials used for detectors, including the Gillette Blue Blade razors used the Foxhole Radio.
 
Are any of our chemically inclined members able to define the junction material in the Blue Blade which enabled it to rectify. As a detector  this was sometimes used with a safety pin for contact, other times pencil lead was used. It is more of a curious undertaking than any monumental research. How did the GI's know it would work?