[time-nuts] High end OCXO alternatives (or maybe an high perf Rb ?)

EWKehren at aol.com EWKehren at aol.com
Thu Dec 8 10:00:32 EST 2011

10E-13 at 100 sec is  a wide range. What about at 1 and 10 sec. and  are 
you talking about 3, 5, 9 E-13.
I personally have quite a few 10811's that brake the 1E-12 from 1 to 100  
seconds my best OCXO is a Datum 1000 that is 3.5E-13 at 1 sec.  and 4 at 10  
and 7 at 100 sec. I control it with a FRK-H which has 7E-13 at 100 sec. 
In this range short of a $ 15 000 Oscilloquartz the best is a HP 5065. They 
 all are below 1 E-12  some as low as 1E-13 at 100 sec. but the only  way I 
know how you know what you are getting is work with Corby Dawson.
Bert Kehren
In a message dated 12/7/2011 9:41:56 P.M. Eastern Standard Time,  
mspencer12345 at yahoo.ca writes:


I'm contemplating starting a search on the  "typical auction sites" for a 
high end OCXO (or possibly a high end Rb) that  would be suitable for 
characterizing the performance of an FTS  1050.   From time to time I've seen ADEV 
figures of in the 10E-13  range (at a typical Tau of 100 seconds) when 
comparing the FTS 1050 in  question to one of my GPSDO's and one of my Rb's.    

At this  point I'm contemplating looking for:

Another FTS 1050
Various Datum  / FTS stand alone OCXO's
An Oscilloquartz BVA OCXO
A Sulzer  OCXO
Maybe an HP 5065

(I've already assembled a modest collection of  half a dozen various 
10811's and don't really want to buy any more at this  point.)

Essentially I'm looking for something with a reasonable likely  hood of 
consistently having an ADEV in the 13's at Taus of 100 seconds or  so.   
I'm thinking that another FTS 1050 is probably the most  likely alternative 
but I'm trying to keep an open mind to other options.   I'm not really 
interested in a Cesium standard but if anyone has any other  suggestions of 
products I could look for (other than a H maser (:   )  comments on or off list 
would be appreciated.

Regards Mark  Spencer

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