WWII FT243 Crystal Manufacturers
Joe McElvenney wrote:
Hi,
Yesterday I bought a 'BOX BX-49-A' (coil/crystal set for the
BC-611 walkie-talkie) with a view to starting a crystal
collection. It contained 24 FT243 rocks from eight different WWII
manufacturers. Just to get an idea of the task ahead, has anyone
compiled a list of these manufacturers from that period?
The few I have so far are marked -
Univ K.C. Telev M.O.
Valpey Crystal
Turner Company, Cedar Rapids
Scientific Radio Prod.
RS MC
Camb Thermionic, Camb Mass
Gentleman Products, Omaha
H.I. Inc
Stand. Piezo
M.P. CO.
TIA - Joe (G3LLV)
The US Navy had a crystal grinding shop in the Navy Yard in Washington
D.C. I
don't know how they were marked when shipped to the fleet. It was in
operation
in 1948 that I know of.
Bill K7NOM
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