Bernd, thanks for the excellent treatment on the subject
glen On 21/09/2019 4:42 PM, Bernd Neubig wrote:
Hi, There is nothing like a fixed ratio between R1 at 3rd or 5th overtone the R1 at fundamental mode. The best approach through C1 and Q. C1 reduces with the square of overtone N (for an infinite crystal plate). In reality C1(3rds about 85% of C1(fund/N^2. For the 5th and higher OT it is about 75 to 70% of C1(fund)/N^2.. Now Q comes into the game: The Q of a crystal designed for 3rd overtone is approximately s
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