[time-nuts] overtone crystal question

[Glen English VK1XX]

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