Re: schematic. There's a link on the second ebay auction page:
http://www.prc68.com/I/pdf/E1938pdfdocs.zip On Sat, Apr 15, 2017 at 10:42 AM, Larry McDavid <lmcda...@lmceng.com> wrote: > Ok, so a standard DB 25-pin socket-contact connector will mate with the > on-board connector with the center hole and missing pins. That's good! > > I now notice a comment on your webpages about this device in which you > mention a schematic. Do you have a schematic of this board? If so, can you > point to it or send me a copy. > > I was unaware of the complete packaged unit on eBay; thanks for that. > > Another poster mentioned the wiring of the connector on the full > instrument version power connector; is that pin-out and spec available? > > Larry > > > On 4/15/2017 5:05 AM, Tom Van Baak 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/290829 >> 077542 -- 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. >> > > > -- > Best wishes, > > Larry McDavid W6FUB > Anaheim, California (SE of Los Angeles, near Disneyland) > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/m > ailman/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.