[time-nuts] Quartz Crystal Motional Movement

[Tom Van Baak]

> The highest Q I remember seeing were BVA's that reached 2e6 to 3e6 @ 5MHz
> 
> Attila Kinali

Hi Attila,

Don't forget about University of Western Australia's multi-decade gift to the world -- whispering gallery Cryogenic Sapphire Oscillator (CSO) -- which have Q near 1e9.

http://arxiv.org/pdf/1504.02711.pdf

http://www.nict.go.jp/publication/shuppan/kihou-journal/journal-vol57no3_4/journal-vol57no3-4_0204.pdf

http://www.armms.org/media/uploads/ARMMS_Oxborrow.pdf

/tvb