Hi Joe, I may have no alternative. I have the manuals, I'll start taking it apart! I am very comfortable with small components, it's repairing oscillators I have the problem with. But I'll give it a try. Schematics for the osc and main board, and board layout for the main board, are available for E1938
Bob ----- Original Message ----- From: J. L. Trantham To: 'Discussion of precise time and frequency measurement' Sent: Sunday, June 20, 2010 11:06 AM Subject: Re: [time-nuts] (no subject) Bob, I do not know about the E1938A but I have repaired 10811's utilizing the excellent troubleshooting section of the 10811 manual. If you are an EE and are comfortable with small components, the 10811 should be no problem. I do not know of a similar manual for the E1938A. Joe -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Robert Benward Sent: Sunday, June 20, 2010 8:53 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] (no subject) Steve, I was looking for insight. For instance, is there a power up sequence for the +5 & +12V? Anything I can look at before I dive in to the can? This is not the first HP oscillator I have that has gone dead on me. I have a 10811 that went south on me a few years back. This is just getting expensive to replace them when they go bad. And yes, if there is someone out there that can do it, I would consider sending it out for repair. I'm an electrical engineer, but I also know my limitations, and although it would grate at me to send it out for repair, it would be the right thing to do (if the price is right) Bob ----- Original Message ----- From: Steve Rooke To: Discussion of precise time and frequency measurement Sent: Sunday, June 20, 2010 1:03 AM Subject: Re: [time-nuts] (no subject) Well, if your not prepared to open it up to fix it yourself, are you looking for someone else to fix it for you (your postings need clarifying)? Steve On 20 June 2010 16:23, Robert Benward <[email protected]> wrote: > Adrian, > I have all this stuff. I really don't want to open this thing up, and my > oscillator trouble shooting skills are not that great. > > Bob > > > ----- Original Message ----- > From: Adrian > To: Discussion of precise time and frequency measurement > Sent: Saturday, June 19, 2010 11:10 PM > Subject: Re: [time-nuts] (no subject) > > > Bob, > > guess you know that detailed documentaion is available here: > http://www.prc68.com/I/HPE1938.shtml > http://www.leapsecond.com/museum/e1938a/ > Open the can and report back! > > Adrian > > > Robert Benward schrieb: > > All, > > Anybody out there know how to fix an E1938 oscillator? Something in the > > metal can has crapped out. No 10MHz, and in turn, no processor action. > It > > worked a few months ago, turn it on today, and worked after about an > hour. > > Turned it on again this evening and nothing. I would hate to take that > > crystal/heater assembly apart. > > > > Bob > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Steve Rooke - ZL3TUV & G8KVD The only reason for time is so that everything doesn't happen at once. - Einstein _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
