[time-nuts] Re: Spectracom 8143 GPS Disciplined Osc

[paul swed]

Cracking up. Circa 2000. Well I have a few bits still working from 1994 and
earlier. Mostly HP test equipment.
That said the typical things that age are mechanical things like fans. Next
the filer caps. Its possible some semiconductors but I have rarely run into
that. Its caps caps caps.
With respect to sending it back, I am sure they checked things out like
sensitivity. But more importantly they may have recentered the OCXO tuning
and lock range. That would be my guess.
Good luck.

On Sat, Jan 14, 2023 at 3:25 PM Shawn <comsec at xmtservices.net> wrote:

> Thanks Paul,
>
> These clocks are still in service but have not had any TLC.  I will
> search for the manual.
>
> I was more interested in any experiences that may be out there with
> care and feeding issues.  I know that Spectracom liked them to come
> back every few years but they were never very forthcoming as to why.
>
> I also believe there may be aging issues that might contribute to
> sporadic behavior, they are circa 1999-2001 and may've been back early
> in their life but have not for at least 10 years. The systems they are
> part of need to keep going for at least 2-3 more years and there have
> been some suspicious clocking related events, all very subtle, that
> could be related to their extended service life.
>
>
> --
> Sincerely,
>
> Shawn Tayler
>
> On Fri, 2023-01-13 at 21:57 -0500, paul swed wrote:
> > Did you do a search online? The manual is readily available.
> > Should be a useful unit IF you can change the 1.544 MHz to something
> > useful like 5 or 10 MHz.
> > Did not look at the schematic to see how they make the 1.544 MHz.
> > Thats a telco clock frequency.
> > Regards
> > Paul
> > WB8TSL
> >
> > On Fri, Jan 13, 2023 at 7:33 PM Shawn via time-nuts
> > <time-nuts at lists.febo.com> wrote:
> > > Hi Paul,
> > >
> > > Yes, my mistake, It was the 8195 Oscillator with the 8143 switch.
> > > I
> > > should've referred to the Oscillator number.
> > >
> > > I'd like to re-ask the same re. the 8195.  These units have 10MHz
> > > with
> > > 1.544 and 1pps outputs.
> > >
>