[ARC5] Crystals in WWII

[Dennis Monticelli]

I work in the semiconductor industry.  There is much work going on to
replace quartz with Si resonators (MEMS) but there has only been a small
dent in the quartz industry.  Quartz turns out to be an excellent material
with a mature manufacturing science.  It is cost effective with modern
equipment (the quartz used is man-made not natural rocks) and very
difficult to displace with other materials.  The quartz industry today is
"not your father's Oldsmobile."

Dennis AE6C

On Fri, Mar 15, 2013 at 8:03 AM, Ray Chase <raydio862 at verizon.net> wrote:

> Hmmm.  I thought crystals were now made from artificially grown material
> like semi-conductors.  Our InfoAge Frequency Control museum room has a
> display salvaged from the closing of Ft. Monmouth that shows this
> operation. Maybe too expensive for small time operations?
> Ray
> ----- Original Message ----- From: "D. Platt" <jeepp at comcast.net>
> To: <arc5 at mailman.qth.net>
> Sent: Friday, March 15, 2013 10:42 AM
>
> Subject: Re: [ARC5] Crystals in WWII
>
>
>  On 3/14/2013 7:55 PM, Robert Eleazer wrote:
>>
>>> Anyone ever hear of this book? Sounds interesting.
>>>
>>> "Crystal Clear : The Struggle for Reliable Communications Technology in
>>> World War II" by Richard J. Thompson
>>>
>>> Wayne
>>>
>>>  Like many here, I too have and read the book.  I found it quite
>> interesting and historically illuminating.  Its too bad that 99% of the
>> crystal manufacturers listed are long gone.  Its a bit rough getting them
>> made these days, with any economy at all.  Having been to the areas of
>> Brazil where these crystals come from (even today), it was good to have the
>> book to finish the story.  One thing did come to light was the issue of a
>> few of the Signal Corps folks getting into trouble, down there, that may
>> have caused larger problems.  What is also not discussed were certain
>> political issues at the time.  Fortunately, Brazil was a true ally, unlike
>> some others south of the border.  In fact, Brazil was the only South
>> American country to actually send troops to combat areas. There is far more
>> to these stories but not germain to the big picture, here.
>>
>> Jeep - K3HVG
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