[time-nuts] using Fury GPSDO with Rb

SAIDJACK at aol.com SAIDJACK at aol.com
Sun Apr 20 23:15:53 EDT 2008

Hello Ulrich,
This is so true. See Tom's phase noise tests of a  Russian Rubidium prototype 
disciplined by a Fury GPSDO. Lot's of times  there is not much space to put a 
good OCXO inside the Rb's case.
BTW: using the Fury's 1PPS input, that unit can be used as a cleanup  loop 
for dirty Rb's that have 1PPS outputs.
I just fired up my FTS1200-100 tonight for testing, it's dead on 5MHz. Does  
anyone have a good circuit idea to go from 5MHz to 10MHz? I was thinking of  
something similar to the HP5370B input circuit - basically a tuned amplifier  
locking onto the 10MHz overtone.
In a message dated 4/19/2008 06:33:21 Pacific Daylight Time,  
df6jb at ulrich-bangert.de writes:

temperature related frequency changes in a typical flat. Given the  fact
that most rbs's stability at short observation times is worse that  that
of good xtal oscillators this makes the FTS1200 the best choice in  my
GPSDO despite of owning an LPRO101 and an FRK-L.

Best  regards

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