and accurate oven (10544)
operation.
Regards
Roy
-Original Message-
From: Dave M
Sent: Tuesday, January 31, 2012 12:01 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP5334B with 10544 OCXO
There is a section in the HP5334 Service manual on changes needed.
The oscillator uses either
cool.
Regards
Roy
-Original Message-
From: Rick Karlquist
Sent: Monday, January 30, 2012 10:43 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP5334B with 10544 OCXO
Roy Phillips wrote:
Mark
By chance I have just today installed a recently acquired
Thanks to Dave and Randall - - yes I did discover the change-over
instructions, and hope to make the change over the week-end.
Roy
-Original Message-
From: Dave M
Sent: Tuesday, January 31, 2012 12:01 AM
To: time-nuts@febo.com
Subject: Re: [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
I think the 10811 was the newer improved replacement for the 10544,
with the same connections and external signals, and a little better
performance. In that era of equipment you may see either one. They
should be interchangeable, and the manuals and specs for both are
readily available.
Ed
Hi Mark, I was the project manager for the 5334B counter.
A rule at HP was that all 10544 sockets are required to work
OK with a 10811 plugged in. There is no rule about the
other way around, however its likely to be workable. The 10544
was long out of production in 1987 when the 5334B was
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
I have had several HP-5370's with the 10544 oscillator. They consistently
have much less long term frequency drift than the 10811's. If they have not
been powered on for a long time, they do take a couple of months of power-on
aging before they settle in.
10544 is cool - earlier version than the 10811. Just make sure that the
unit is getting warm - some of them have had oven controller problems - but
haven't we all??!!
Regards,
Bill Riches
WA2DVU
-.
Hello.
I recently bough an HP-5334B counter with option 010 from the big E. A
Google
Could it be that since they are much older (on average) than the
10811s, that (if they've been running) they would have much more
accumulated time, so in a more stable part of the long term drift curve?
Ed
Mark Sims wrote
Mon Jan 30 18:50:36 UTC 2012
I have had several HP-5370's with the
ed breya wrote:
Could it be that since they are much older (on average) than the
10811s, that (if they've been running) they would have much more
accumulated time, so in a more stable part of the long term drift curve?
Ed
This argument is frequently advanced, however there is no guarantee
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.
be appreciated.
Regards
Roy
--
From: Allwright, Mark mark_allwri...@kindermorgan.com
Sent: Monday, January 30, 2012 4:02 PM
To: time-nuts@febo.com
Subject: [time-nuts] HP5334B with 10544 OCXO
Hello.
I recently bough an HP-5334B counter with option 010 from
Subject: Re: [time-nuts] HP5334B with 10544 OCXO
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
Roy Phillips wrote:
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
Arthur Dent wrote:
At http://home.teleport.com/~oldaker/10mhz_construction.htm which has
TAPR info,
I found this description of the differences. If you have a Thunderbolt or
rubidium to feed
in to replace the internal oscillator, or you're not concerned about
leaving the oven
energized
Subject: Re: [time-nuts] HP5334B with 10544 OCXO
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
I think the 10811 was the newer improved replacement for the 10544,
with the same connections and external signals, and a little better
performance. In that era of equipment you may see either one. They
should be interchangeable, and the manuals and specs for both are
readily available.
Ed
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