Last week I bought a very clean 5370B, in near new condition (missing OCXO but I have a spare one). It has a HP tag on the top edge of the rear frame, under the top cover, which says: Date 12 09 97 5370A to 5370B by 28457 The serial number is 2116A01177. The front panel template is marked 5370B. I understand that it was a 5370A factory upgraded to B, and I'm wondering if such an upgrade might have been requested by the customer (Digital in the case) and why, or the item was a resurfaced old stock, just sold after the upgrade. Any idea?
>----Messaggio originale---- >Da: iov...@inwind.it >Data: 22/02/2010 20.47 >A: <time-nuts@febo.com> >Ogg: Re: [time-nuts] OCXO info? > >Yes, it is the R-1051 frequency standard, I have one. It was made by General >Dynamics, and was rated, if I recall, at 1x10E-8 per day. >See also this archive at >http://www.mail-archive.com/time-nuts@febo.com/msg02674.html >Antonio I8IOV > > >>----Messaggio originale---- >>Da: li...@cq.nu >>Data: 22/02/2010 18.17 >>A: "Discussion of precise time and frequency measurement"<time-n...@febo. com> >>Ogg: Re: [time-nuts] OCXO info? >> >>Hi >> >>Assuming it's an R1051 "standard" you then have to know who made it. Some of >>the later parts made by the replacement parts empire were of questionable >>performance / reliability. The side with the markings likely would tell us a >>lot. >> >>Simple answer - when it's not Chinese New Year, the auction sites are full >>of < $20 OCXO's (including shipping) that will do a *lot* better. If you are >>patient, you likely can get below $10. How they can do that with shipping is >>a total mystery. >> >>Bob >> >>-----Original Message----- >>From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >>Behalf Of Arthur Dent >>Sent: Monday, February 22, 2010 10:12 AM >>To: time-nuts@febo.com >>Subject: [time-nuts] OCXO info? >> >>It looks like the 5Mhz frequency standard module from >>a R-1051 receiver. You might find info on it here. >> >>http://www.jamminpower.com/main/r1051.html >> >> >> >> >>_______________________________________________ >>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. >> > > > >_______________________________________________ >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.