[time-nuts] AN/URQ-13 question How long

[Magnus Danielson]

Hi Attila,

On 2021-03-05 16:32, Attila Kinali wrote:
> On Thu, 4 Mar 2021 08:59:10 -0500
> paul swed <paulswedb at gmail.com> wrote:
>
>> How stable? No published specs for this unit. But the older AN/URQ-10 was 5
>> E -10 and I have set the unit to 5.7 E -11. But it is still moving around
>> and just starting to document that. Really do not have a trend line yet.
>> Hope that helps.
> Maybe as a point of reference: The OCXO in my SR620 flutters around
> 10MHz with a few parts in 1e-10 in the course of a few weeks/months.
> It is an older model, judging from the oxidation on the BNC connectors
> and has been continuously running for at least 2 years.
>
> Unfortunately, I am not logging the frequency of the SR620, so I cannot
> make any more precise statements. (I really need to build some rig where
> I can measure lots of 10MHz sources in continuously...)

Do you have the SC10 OCXO in your SR620?

Cheers,
Magnus