A few months ago, my 3801A started doing this. It was tracking sats well
(several years ago I had to replace the receiver because it had lots of
problems acquiring and tracking sats).I swapped in a replacement 10811 OCXO
and that fixed the problem.
Apparently the problem with the receiver
On 6/20/2019 12:41 PM, paul swed wrote:
Dan,
I think that sounds like the rcvr going. Search the time-nuts archives.
That may help you. If thats the case there were also comments on
alternate receivers though all of those are old and hard to come by.
Thanks Paul, The concensus seems to favor
Hi
Anything odd going on with the EFC voltage before / after holdover?
Bob
> On Jun 20, 2019, at 1:05 PM, Dan Rae via time-nuts
> wrote:
>
> I have an elderly 3801A with some 182,000 hours on the clock, which if my
> arithmetic is correct means over twenty years of operation. Since it has a
Dan,
I think that sounds like the rcvr going. Search the time-nuts archives.
That may help you. If thats the case there were also comments on alternate
receivers though all of those are old and hard to come by.
I also have a 3801 but do not run it all the time. Another issue is that
the oven contro
On Thu, 20 Jun 2019 at 14:08, David Slipper wrote:
>
> That is probably good enough for my needs and certainly better than the
cheap XOs in the instruments.
>
> BTW I just came across a document "GPS-based Timing Considerations with
u-blox 6 GPS receivers - Application Note" that makes interesting
Thanks, I'll look at that :-)
On 20/06/2019 10:04, Askild wrote:
> Hi,
>
> If you want to use it as a 10MHz ref for other instruments, you might
> consider building a GPSDO with it.
> Here is one:
> https://www.eevblog.com/forum/projects/lars-diy-gpsdo-with-arduino-and-1ns-resolution-tic/
>
> All
I have an elderly 3801A with some 182,000 hours on the clock, which if
my arithmetic is correct means over twenty years of operation. Since it
has a well aged and remarkably stable OCXO I would like to keep it going
if possible. Recently it has been going into Holdover and staying there
for n
Hi
The other gotcha is that (as noted in other posts) the signal is not
particularly clean noise wise.
Given the low cost of a GPSDO these days, going that way is not a really big
deal investment
wise. Even the low end units will give you a *much* better 10 MHz to drive an
instrument than
th
That is probably good enough for my needs and certainly better than the cheap
XOs in the instruments.
BTW I just came across a document "GPS-based Timing Considerations with u-blox
6 GPS receivers - Application Note" that makes interesting reading.
Many thanks
Dave
On 20/06/2019 00:19, Bob kb
Hi,
If you want to use it as a 10MHz ref for other instruments, you might
consider building a GPSDO with it.
Here is one:
https://www.eevblog.com/forum/projects/lars-diy-gpsdo-with-arduino-and-1ns-resolution-tic/
All the information is in the first post. If you read the complete thread,
you will
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