[time-nuts] How quartz crystals are (were) fabricated

Bob Camp lists at rtty.us
Fri Aug 2 13:28:52 UTC 2013


Hi

One would assume that the rest of the world also made a few crystals during the same period.

Bob

On Aug 1, 2013, at 10:41 PM, "Charles P. Steinmetz" <charles_steinmetz at lavabit.com> wrote:

> pete wrote:
> 
>> I can't find it but I saw a reference to how may units were made during
>> WWII, does anyone have the number and the reference ?
> 
> "The total number of QCU's produced by all manufacturers during the war is difficult to ascertain; estimates have ranged from 30 million to over 70 million QCUs produced by American manufacturers between 1941 and 1945."
> 
> McGahey, Dissertation, "HARNESSING NATURE'S TIMEKEEPER: A HISTORY OF THE PIEZOELECTRIC
> QUARTZ CRYSTAL TECHNOLOGICAL COMMUNITY (1880-1959)" (Georgia Institute of Technology, 2009),  253 <http://smartech.gatech.edu/bitstream/1853/28255/1/mcgahey_christopher_s_200905_phd.pdf> [citing Virgil E. Bottom, "A History of the Quartz Crystal Industry in the USA" (Proceedings of the 35th Annual Frequency Control Symposium, Philadelphia, PA, 27-29 May 1981), 3-12; and Richard J. Thompson Jr., Crystal Clear: The Struggle for Reliable Communications Technology in World War 2 (New York: Wiley-IEEE Press, 2006), 163-4.]
> 
> Best regards,
> 
> Charles
> 
> 
> 
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.




More information about the Time-nuts_lists.febo.com mailing list