[time-nuts] Antique 5061A option 004

bownes bownes at gmail.com
Mon Oct 15 21:42:07 UTC 2012


Boy am I glad I didn't go to either!

On Oct 15, 2012, at 17:30, "David I. Emery" <die at dieconsulting.com> wrote:

>    In a mad moment at the NEARFest flea this weekend I grabbed
> a 5061A for $250.   Poor thing was getting wet in the rain and needed
> a home.  Really really heavy to carry to the car, however...
> 
>    It has a high performance option 004 CBT in it (late SN
> 3112A02887 dated 05/93).   And a 10811-60109 OCXO.   Option 3 whatever
> that is, and H29 too.   Seems to have a BNC marked C field...
> 
>    Chassis SN is 2002A01710 but a number of the modules have  late
> series numbers such as 2740 for the synth, 2652 for the oven controller,
> and 2448 for the AC amp..
> 
>    The unit obviously came from the Naval Observatory (similar
> to Paul Swed's I presume)... has a sticker on it.
> 
>    Looks superficially as if it was upgraded various times -
> wondering if anyone could suggest where a manual that would cover the
> OCXO mod and others on into the 90s might be had (Artek ?) 
> 
>    I have yet to fire it up (gotta dig out a power cord I have
> somewhere in the way back junque)... but FWIW (not much I am sure) I was
> told it would lock "after a while".
> 
>    I suppose it is time to see if it will pump down and have any
> measurable beam current - I guess at least possible that a CBT that
> young might still have a tiny bit of life left.
> 
>    A question - I assume the OCXO is 10 MHz (I think all 10811s
> are) and thus it obviously must be easily possible to provide a 10 MHz
> output. Is there a point to attach a SMA to BNC for this ?
> 
>    It is my first Cesium, now I guess I officially have the
> disease, all those Rbs and GPSDOs being just prodromal syndromes...
> 
>    I also grabbed a PRS10 at the flea (that was pretty cheap
> at $50) and wonder where I might land a PBBT adapter for it cheap
> too... I'd rather see if it works OK before investing in a new one
> first... and that connector is a bear.
> 
> 
> -- 
>  Dave Emery N1PRE/AE, die at dieconsulting.com  DIE Consulting, Weston, Mass 02493
> "An empty zombie mind with a forlorn barely readable weatherbeaten
> 'For Rent' sign still vainly flapping outside on the weed encrusted pole - in 
> celebration of what could have been, but wasn't and is not to be now either."
> 
> 
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