Hi At least at Vectron / Norwalk, the standard process was to get in an order that was based on the catalog part number. Even if it was for 5 pieces and a dead stock item, a 4 digit code was generated. Any order that came in after the first one likely used the 4 digit code. It took care of “fitting” the part number into a database field and / or reduced the typo errors on the long catalog part numbers.
Bob > On May 25, 2020, at 12:05 PM, Dave Miller <[email protected]> wrote: > > Thank you Bob, > That gives me enough confirmation and direction to do some testing. > BTW it was not a Fleabay purchase but a gift from a good friend. Here I > thought you might like this. :-) > I shall report back my findings. > Thanks > Dave > > > On Mon, May 25, 2020 at 7:48 AM Bob kb8tq <[email protected]> wrote: > >> Hi >> >> It’s a good bet that the power is as indicated. Is there a second supply? >> …. who knows .. in some cases there is. Is it an XO, a VCXO, a TCXO, >> or an OCXO? The base part number should give you some indication >> of that. >> >> If it’s a voltage controlled device one of the “not ground, not power , not >> output” pins should tune the beast. Try feeding a 2 to 3 V signal through >> a >> 10K ohm resistor to the suspect pins and see what happens. They also >> might be enable / disable or factory adjust pins, thus the isolation and >> low >> voltage. >> >> A pin that comes up with a voltage on it when the unit is powered is likely >> a Vref pin. It might be a combined Vref / tune pin …. again who knows. If >> a 10K to ground on the pin tunes the part, it’s a combined pin. >> >> Output wise, if it’s logic output, your scope should tell you all you need >> to >> know. If it’s sine wave, load is *probably* 50 ohms. It could be just about >> anything …. >> >> Stability wise you are flying blind. Is it more stable than a 30 cent TCXO >> from China? Does it have better phase noise? Are it’s harmonics better? >> No way to know without measuring each parameter. >> >> Indeed, even if you *had* the spec sheet, there is no guarantee that the >> eBay part you have still meet it’s original specs. >> >> If supply is not marked, then a careful guess about pins is the first step. >> Next is a gentle application of power with careful monitoring as you >> go from 3 to 5 to 9 to 12 to 15 to 24. If it’s a negative supply part, good >> luck figuring that out….. >> >> Lots of fun !!! >> >> Bob >> >>> On May 25, 2020, at 10:08 AM, VE7HR <[email protected]> wrote: >>> >>> Let’s ask this another way then, >>> Can anyone point me towards a good basic care and feeding of XO’S >>> The looks on the time nuts landing webpage give 404 errors. >>> After some more searching the web I bet I can figure out the pinout of >> the connector as they all seems to be the same on the timekeeper devices. >> The voltage is marked so that is easy. >>> What are the common electrical tuning voltages and how might you black >> box them? >>> Are old ones bipolar or unipolar? I will experiment but like to keep >> the smoke in the can. >>> >>> Any help is appreciated. >>> Thanks >>> Dave >>> VE7HR >>> >>> Sent from my iPad >>> >>>> On May 25, 2020, at 5:05 AM, Bob kb8tq <[email protected]> wrote: >>>> >>>> Hi >>>> >>>> Both part numbers are “OEM” numbers. In both cases, the official company >>>> policy is to not hand out the specs. There are a number of reasons for >> this, >>>> including the time needed to dig out the latest spec. (it’s not as easy >> to go >>>> through 50+ years and > 60,000 paper specs as it might seem …). The >> other >>>> driver is that they like selling spares ….. >>>> >>>> Bob >>>> >>>>> On May 24, 2020, at 7:30 PM, Dave Miller <[email protected]> wrote: >>>>> >>>>> I did a bit of Googling and have come up with nothing so I joined up to >>>>> this list and will ask a few questions. >>>>> >>>>> Looking for a data sheet for Vectron Model 207-5916. I know it's >> 10MHz. It >>>>> seems to produce an output powered by 12V and I expect the white wire >> is >>>>> for the wiper of the frequency adjusting pot. >>>>> That was just a WAG based on the colours of the wires on the connector. >>>>> >>>>> Second one is a Wenzel 500-0481. If I recall, I called Wenzel a while >> ago >>>>> and they would not give me a pinout as it was a proprietary parts >> number. >>>>> >>>>> Is there a standard on the- multi pin connector. It's marked 12V 10Mhz. >>>>> They also wanted me to send them in for calibration as they said it >> was so >>>>> old they were curious to see what frequency it was. It's a virgin with >>>>> no wire ever soldered to it so I can't guess the wiring. >>>>> I did not send it in as the shipping and calibration charges were >>>>> significant. >>>>> >>>>> While I wait for my 5372A I have the Vectron warming up connected to >>>>> Timelabs with a talk only HP counter. >>>>> >>>>> Thanks >>>>> Dave >>>>> >>>>> >>>>> -- >>>>> 72 de Dave >>>>> VE7HR >>>>> _______________________________________________ >>>>> time-nuts mailing list -- [email protected] >>>>> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >>>>> and follow the instructions there. >>>> >>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- [email protected] >>>> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >>>> and follow the instructions there. >>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >>> and follow the instructions there. >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. >> > > > -- > 72 de Dave > VE7HR > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
