Why do you need such such good phase noise?
An average oscillator will be good enough to measure to -70 dBc or so.
You could use a DDS with a crystal clock - this will have good close in
phase noise (neasrly as good as the clock), though coherent spurs might
be a problem.

Richard


J M Noeding wrote:
Hi

need a low-noise xtal oscillator using 14.7 or 15.7MHz rubber xtals in
series mode circuit to sweep xtal filters with good as possible noise
distance. The available xtals are believed to pull +/-10kHz or more.

Any suggestions.

73
Jan-Martin, LA8AK
http://home.online.no/~la8ak/c.htm
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J. M. Noeding, LA8AK, N-4623 Kristiansand
http://home.online.no/~la8ak/c.htm