The SC cut crystal is generally credited to Jack Kusters (of HP) and Errol Ernisse. The story was something like Errol proposed the concept and Jack actually made the first one, which was quite non-trivial. Jack used to joke that "SC" stood for Santa Clara. (Jack and I worked for the old HP Santa Clara Division). Jack, along with Charles Adams and Jim Collin, produced 100's of thousands of SC cut crystals and taught the rest of the industry how to make them. Jack was very particular about making them "correctly" in terms of angle of cut, etc. He was really proud of his X-ray system that was accurate to 2 arc-seconds. This was instrumental in being able to actually fabricate "true" SC cut crystals.
Rick Karlquist N6RK On 9/11/2012 9:38 AM, Bob Camp wrote:
Hi The answer to any crystal cut origin question is always a bit murky. People have been chopping quarts in strange ways for quite a while. Certainly the first to popularize the SC cut were the boys at HP. One common answer to these questions is "it's in Heising": http://books.google.com/books/about/Quartz_crystals_for_electrical_circuits. html?id=2-4gAAAAMAAJ Of course a *lot* depends on just how much you read between the lines.... The Wikipedia article is a bit odd. The crystal oscillator industry was quite crowded long before Statek came along. There is a *lot* of history missing there... Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Tuesday, September 11, 2012 12:00 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] SC Cut Curious who came up with the SC cut first ? The well done Wikipedia page http://en.wikipedia.org/wiki/Crystal_oscillator doesn't say -pete _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
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