[time-nuts] NTGS50AA, better than Thunderbolt?

[Bruce Griffiths]

Chuck Forsberg WA7KGX N2469R wrote:
> OK, what are the differences between
>
> 37265
> 34310
> 49422
>
> The 32765 is in one of my thunderbolts.
>
> I replaced the failed OCXO in another Thunderbolt with the 49422.
> The 49422 has a different pinout, is taller, and has opposite gain.
>
> Is there a difference in stability?  Any pin for pin replacement
> for the 37265?
>
37265             - low phase noise floor (can be as low as -175dBc/Hz), 
high tempco

34310-T         - relatively high phase noise floor (~ -150dBc/Hz).

49422             - ??. haven't measured one.

Bruce