Tom #1 proved useful when this sub assembly failed (no 10MHz output) in my E1938A.
Someday I'll disassemble it to see what exactly failed. Also have #3 which works well when one figures out the connections on the PCB and the unusual backplane connector. Bruce > > On 16 April 2017 at 00:05 Tom Van Baak <t...@leapsecond.com> wrote: > > > > > > I purchased one of these HP E1938 OCXO recently on eBay but have > > not yet > > received it. > > > > Is that special D-Submin connector a receptacle-shell, pin contact > > version? Will a standard plug-shell, socket contact 25-pin D-Submin > > fit it? > > > > > > Hi, > > I'll cc the group here since we may get some useful comments. > > I'm not exactly sure what you mean. The E1938A oscillators that I've seen > and tested look like this: > > http://www.leapsecond.com/museum/e1938a/ > > And those can be interfaced with a simple D-sub DB25 connector on the > PCB. For connections, see that page, or any number of postings about the > E1938 in the time-nuts archives. > > Note that on eBay there are at least three variations of E1938A > oscillator. The item#'s below are just random search picks (I have no > affiliation with any buyers or sellers) and I also know not all surplus > refurbished surplus recycled surplus stuff works. But we do this because when > they did work, they are sometimes totally amazing. > > 1) There's the bare "puck" alone, as in > http://www.ebay.com/itm/290829077542 -- and I have no idea where one would > start with that item since all the support circuitry on the PCB would have to > be re-created by hand. > > 2) There's the integrated PCB assembly, as in > http://www.ebay.com/itm/181043193416 -- which is more like what I tested. > > 3) There's the full instrument version, as in > http://www.ebay.com/itm/171293069062 -- which is most likely to work, or be > less hacked up, or dented, or salvaged, or rusted. It even has all the > connectors and power supplies, and GPS, etc. > > If any other time nuts have experience with each of these methods to > obtain a E1938 oscillator, please let us know. > > Thanks, > /tvb > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
