[time-nuts] f-multipliers from VHF to 10 GHz

[Gerhard Hoffmann]

I have a potential project in the electron spin spectroscopy sector and 
I need
one or two clean signal sources in the 10 GHz range. Phase noise at, 
say, 50 Hz offset
is important, but anything below 110 dBc  does not care.
That probably calls for a multiplied crystal. These Hittite PLLs from AD 
seem to be
just not good enough, maybe they'd work if pushed, but no reserve left.
Are there any known proven multipliers chains from VHF to 10 GHz?

Cheers, Gerhard