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?

Thank you to the individuals who have added to my list but, as
the following document shows, there were at least 130 companies
'grinding away' back in 1943. It would seem that anyone who had a
garage and a drill press could get into the game.

http://www.ieee-uffc.org/fc_history/bottom.html


73 de Joe G3LLV