[time-nuts] To improve a Tbolt?

[Dan Rae]

I have been reading with interest John Miles' page about his Tbolt 
'upgrade'.

http://www.thegleam.com/ke5fx/tbolt.htm

I have a newly acquired Tbolt here, and also have lying around an almost 
identical 10811-60111 OCXO which I am considering using with it, exactly 
as John describes.  However my Tbolt is of a later vintage than John's 
(2005 date code) and I wonder if that would show as big an improvement 
as John reports.  The on board OCXO on this one has a Trimble sticker on 
it, but otherwise looks similar to the one pictured on John's page.  The 
GPS receiver area of my board also looks very different, but I don't 
think this would have any effect.

Not having the sort of phase noise measuring facilities here to be able 
to test it, I am wondering if anyone else has done this with a similar 
vintage Tbolt, and could say if it is likely to show as big an 
improvement as John seems to be getting.

I was a little surprised at the amount of short term variation, of the 
order of minutes duration, that I was seeing on another Tbolt when using 
it to set a Rb standard. 

The obvious answer to my question is to try it and see, but I'd 
appreciate hearing from anyone who has tried it!

Dan