[Milsurplus] WWII crystal size

[Mike Morrow]

Phillip wrote:

>Just before WWII, the US Army developed a method of crystal
>construnction, that cut down the amount of  quartz required to make
>a crystal to 1/4 the orginal amount . The crystals used in the FM sets
>are quite small ,as a result.

There's an interesting short history of U.S. radio crystal technology development in WWII at:

http://www.ofc.com/library/vbottom.html

73,
Mike / KK5F