Mark
By chance I have just today installed a recently acquired 10554 OCXO into my
HP 5334B Counter. Its has been running for 5 hours and is yet to
stabilize - my Manual suggest that 24 hours is the required time. Despite
reading the manual, I cannot see any reference to the change over from the
"low grade" inbuilt oscillator - is this automatic or does it require a
jumper alteration. I seem to recall that Rick Karlquist referred to a
voltage "droop" in the PSU occurring, due to the additional load of the oven
as a consequence of fitting the OCXO to the 5334B. I assume that this is
when the oven is taking maximum current - perhaps he will offer some help
(again) as I cannot find his earlier comments ? I note that the rear
"simple" oscillators trimmer is still operative - should this be so ?, or is
it indicative to a need to disconnect it ?
Again, any comments would be appreciated.
Regards
Roy
--------------------------------------------------
From: "Allwright, Mark" <[email protected]>
Sent: Monday, January 30, 2012 4:02 PM
To: <[email protected]>
Subject: [time-nuts] HP5334B with 10544 OCXO
Hello.
I recently bough an HP-5334B counter with option 010 from the big "E". A
Google search seems to indicate the OCXO should be a 10811 type OCXO but
mine has a type 10544.
Other than taking longer to warm up does anybody see any problems with
this? Basic testing shows the unit seems to work OK. It is reading 1.7
Hz low compared to my Thunderbolt at 10 MHz - I have not tried adjusting
the trimmer on the 10544 yet.
Comments and thoughts appreciated.
Regards.
Mark.
VE6NTP
--
Mark Allwright
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