[time-nuts] Re: Piezo Systems OCXO Data?

[Keelan Lightfoot]

Bob,

Thank you! As I mentioned in my other message to Bob Camp, once I started
actually troubleshooting, I realized my most likely problem is an absent
power supply rail. I still don't know if the OCXO is good, I could test it
in-situ, but it's a bit of a hassle with the way the thing is constructed,
so I'll wait until the parts are here tomorrow to repair the power supply
and check the OCXO output. Regardless, I really appreciate you taking the
time to find this for me, and it's answered some of the questions I've had
floating around in my head.

It's not too surprising Trimble opted to use an HP 10811 clone. Trimble's
first GPS receiver was developed at HP. With the future of the GPS
constellation uncertain, HP lost its appetite for pursuing what might be a
dead end and sold their gestational GPS product to Trimble.

- Keelan

On Wed, Jun 14, 2023 at 11:58 AM BOB RAKER via time-nuts <
time-nuts at lists.febo.com> wrote:

> It's an HP 10811 clone -  see attached
>
> BR
>
> On Tue, Jun 13, 2023 at 8:43 PM Bob Camp via time-nuts <
> time-nuts at lists.febo.com> wrote:
>
> > Hi
> >
> > The ex-Piezo plant is now an exhibit hall that hosts things like the
> > reptile club show and various auto
> > auctions. Piezo folded into McCoy back in the 1990’s. McCoy was part of
> > Corning for a while. Then moved
> > to the Vectron / Dover empire. That spun off when Knowles and Dover
> split.
> > It then went to Microsemi.
> > Microsemi was bought by Microchip. The name on the sign in front of the
> > plant still was Microchip last
> > time I looked.
> >
> > The only point in that is, it’s been a *long* time since that part was
> > made. I very much doubt anybody
> > currently with the (far removed) current company will know anything about
> > it.
> >
> > Even back in the day, these parts did not get documented with customer
> > repairs as a goal. If you wanted
> > it fixed, you got a repair quote from the plant. The repair cost may or
> > may not have made sense to you. If
> > it did, you sent it back to the plant and they did what they could for
> the
> > quoted price.
> >
> > Bob
> >
> > > On Jun 13, 2023, at 10:44 AM, Keelan Lightfoot via time-nuts <
> > time-nuts at lists.febo.com> wrote:
> > >
> > > I'm trying to track down a datasheet for a Piezo Systems OCXO,
> 10.000MHz,
> > > P/N 281007-23. Address on the can is P.O. Box 619, Carlisle, PA, 1987
> > date
> > > stamp. Mine appears to have died.
> > >
> > > - Keelan
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