[time-nuts] To improve a Tbolt?

[Ulrich Bangert]

I would be interested in this information as well!

Best regards
Ulrich Bangert

> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Dan Rae
> Gesendet: Donnerstag, 20. November 2008 18:58
> An: time-nuts at febo.com
> Betreff: [time-nuts] To improve a Tbolt?
> 
> 
> 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


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