[time-nuts] Crystal Drive Level

[Peter Putnam]

Greetings...

I have a well-specified quartz crystal:

Bliley BG71A
(vintage mid 70's ?)
3.000 000  MHz
parallel resonant, 100 pF
80 deg C
tempco of <1.5/10e7/deg C over range 79 to 81 deg C
in a glass enclosure with 9-pin miniature tube base

that I would like to utilize in an oscillator circuit such as the one 
proposed by Bruce Griffith in his note to this list on 8/11/2008.

How can I determine the crystal drive level and be certain that the 
drive level specified as "10 microwatts into10 ohms" will not be exceeded?

Regards,
Peter