Hi
Since the devices may sit for a *long* time on the shelf, humidity can soak
into parts. Adsorption / desorption rates normally are very different so a brief
soak in may mean a *long* soak out.
Bob
> On Dec 23, 2019, at 4:01 PM, Hal Murray wrote:
>
>
> kb...@n1k.org said:
>> Like all
kb...@n1k.org said:
> Like all ânormalâ 10811âs they are an open construction and move a bit
> from
> humidity and barometric pressure.
How significant is humidity given that most of the interesting stuff is kept
warm?
Could I measure that using a typical bench as an environmental
I have done this with an older 5061A that still has a good Cs tube but I
don't want to use it too much.
I used a Brooks Shera kit and a Trimble Lassen IQ receiver and fitted it all
into the empty battery compartment. With a bit of modification it was
possible to retain the Cs function but run it
Hi
The PPS input on the 5071 does *not* set the frequency of the device. To do so
would “break” the
Cs ( = you use the beam to get frequency). The *only* thing the PPS input gets
used for is to reset
the *time* to sync with UTC.
Bob
> On Dec 19, 2019, at 5:56 PM, Taka Kamiya via time-nuts
My experiment is not going well so far. I have NOT done any tuning. Just
connected 1 pps out from GPS to 1 pps IN on 5071A. Frequency keeps increasing,
which I think is weird. I thought it might just be unstable without proper
parameters, but no. Over last 24 hours, it kept going up. I
Hi
The OCXO in the 5071 is an HP10811 it was selected at the time of manufacture
for
good performance. As far as anybody knows that testing was for short term
stability.
How well it retains that performance many years later - who knows? Is the
original
OCXO in the device - who knows…. Other
Taka,
Check your inbox from 10/2/2019:
"A fun (and actually very useful) project would be to turn it into a
GPSDO. There are SCPI commands to slew the rate of the internal
synthesizer so you wouldn't even need to remove any parts, break any
wires, or solder anything".
There are copies of
