[AMRadio] Quartz Crystal manufacture in 1943, a little radio history

[Jay Bromley]

I got this from a friend and is very interesting if you have not seen it
before.  73 de w5jay/jay..

 

 

A little over 40 minutes long............

 

A really fascinating story in pictures of the preparation and manufacture of
quartz crystals for radio communication.
Dating back to 1943... how times have changed...

http://archive.org/details/6101_Crystals_Go_to_War_01_20_16_21