I've got one with a similar shape crystal wafer but packaged in a glass HC6/U package. However most of the glass-packaged crystals I've seen have been in a small vacuum-tube style package with a long, narrow strip of crystal. I think 16kHz is the lowest I've seen.
On Mon, Mar 1, 2021 at 12:10 AM Bob Albert via time-nuts < [email protected]> wrote: > Is that a PR Peterson Radio logo? > On Sunday, February 28, 2021, 03:53:32 PM PST, Dan Kemppainen < > [email protected]> wrote: > > Hi All, > > I've picked up a couple of old crystals. Mostly because they look neat. > They are 1Mhz, in a glass tube. The quartz is ~25mm dia, at about 1 mm > thick. Was able to get them to oscillate using a Colpitts circuit. They > will oscillate at 2.851Mhz (probably some strange mode) if given the > chance. > > I've been scouring my reference books here, and haven't had much luck > finding any details on how one would even guess at the parameters of a > quartz like this. > > There area few numbers on them, 33 stamped on the side, 1000 (KHz???) on > the top, 87 on the top, and hand written 501 (probably a SN). Digging on > line, I'd guess an AT cut based on thickness. I'm guessing the 33 is > capacitance in pF. 87, might be year. > > If any of you have any suggestions on where to find information on how > to get something like this to oscillate properly, guess at correct > parameters, or even measure any of the parameters I would really > appreciate it. > > I'm sure these are really nothing special, but it would be neat to give > them a fighting chance to show what they can or can't do without > breaking them! > > Thanks, > Dan > _______________________________________________ > 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.
