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

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@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 > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

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@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@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 > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe send an email to time-nuts-leave@lists.febo.com > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

Bob, Thanks for the history, it’s always interesting looking back at the growth of a corporate organism. This is the oscillator in a Trimble 4000X GPS from 1987. It was producing no output, but it didn’t have a chance to dig into it too deeply the night before last, but I figured I’d get the ball rolling in finding a replacement. The problem is that I don’t know what the output characteristics or control voltage characteristics are to source a replacement. I had a chance to dig deeper last night, and in one of the RF modules inside the receiver, I found two scorched inductors, and a very crispy and guily looking tantalum capacitor. The capacitor shorted the output of the LM317 that provides the +12V supply to the OCXO, which caused the two inductors supplying the +14V input to the regulator to also combust, eventually burning out the +14V fuse in the power supply. The RF cans must be well sealed, because I didn't smell anything... Thinking about it now, it may have happened years ago and failed open, but me jostling it around on my bench may have closed a previously opened short. And now I have a pile of tantalums on their way to re-cap the entire receiver. - Keelan On Jun 13, 2023, at 6:43 PM, Bob Camp via time-nuts < time-nuts@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@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 _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe send an email to time-nuts-leave@lists.febo.com _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe send an email to time-nuts-leave@lists.febo.com

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@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@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@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 > > > _______________________________________________ > > > time-nuts mailing list -- time-nuts@lists.febo.com > > > To unsubscribe send an email to time-nuts-leave@lists.febo.com > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe send an email to time-nuts-leave@lists.febo.com > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com