Ed I may be wrong. Its not on Diddiers site. I thought I obtained my print from the web. But I also do not seem to have the pdf. Quite curious. Will keep digging
On Tue, Sep 27, 2011 at 2:25 PM, paul swed <paulsw...@gmail.com> wrote: > Ed the 5065a manual does have the schematics. Its available online free. I > think Diddiers site has it. There seemed to be at least 2 chips that were > used. > Bottom line is the data on how hp used and drove is available which is > great news > Paul > WB8TSL > > > On Tue, Sep 27, 2011 at 1:54 PM, ed breya <e...@telight.com> wrote: > >> I am restarting an old project to transplant my HP Z3801A guts into a >> 5065A carcass, and now designing the power system. I'd like to keep the >> original LED clock function, but with all new power and interface. I traced >> out the circuit partially a few years ago, and am going by the notes I made >> back then. >> >> The clock IC is a 28 pin DIP, marked with the National Semiconductor logo, >> and only the code "025B." I assume it is a standard clock IC of the era, >> probably PMOS. Does anyone know the true part number? I have never seen a >> 5065A schematic or parts list. The HP part number may help if it can be >> cross-referenced. I have looked at data on a number of National and other >> clock ICs from back then, and saw none that seem to match what's in there. >> >> Ed >> >> >> ______________________________**_________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/** >> mailman/listinfo/time-nuts<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.