[time-nuts] Looking for "The Theory and Design of Quartz Crystal Units" by V.Bottom

[jimlux]

On 10/24/20 3:14 PM, Bob kb8tq wrote:

> 
> After it’s sealed up (and possibly processed a bit after seal) you test it to see how
> you did. Some number will be ok, the rest head into the trash. The good ones go
> into oscillators. Is that 5% or is that 80% … depends on what you are after ….
> 
> Bob
> 

The guys at APL told me that they start 1000 blanks to get a dozen USOs 
for space, of which 4 will actually be packaged as flight units.

That's for a "gotta be the best" sort of application.