List, In getting documentation together for my HP 107BR I discovered the manuals I was able to aquire were for prefix 333. My unit prefix is 708.  Does anyone have that prefix schematics or an errata sheet?  Or does the 708 prefix just designate another factory run? TIA Perrier

Perrier The manual we offer on our WEB site is centered on serial Prefix 512 with change sheets up to serial prefix 708. There are several changes, between the 512 and 708, different configuration of the A1Y1 , Coax changes, Powers Supply changes. Many many changes in circuit details between 333 and 708. As point of note HP serial number prefixes are Engineering Change Dates not Production Run Dates. 708 is 8th week of 1967..but a 708 unit could have been manufactured months or even years after that date -DC manuals@artekmanuals.com www.ArtekManuals.com On 3/6/2018 11:57 PM, Perry Sandeen via time-nuts wrote: > List, > In getting documentation together for my HP 107BR I discovered the manuals I was able to aquire were for prefix 333. > My unit prefix is 708.  Does anyone have that prefix schematics or an errata sheet?  Or does the 708 prefix just designate another factory run? > TIA > Perrier > _______________________________________________ > 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. > -- Dave Manuals@ArtekManuals.com www.ArtekManuals.com --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

Hi The oscillators were tested and sorted at the end of the manufacturing line. Everything got checked for aging. It’s not clear that everything got detail tested for ADEV. The suspicion is that they did enough ADEV to get the few tight(er) spec units they needed. Next layer is that these tests were done a *long* time ago. The characteristics of OCXO’s do change with time. What was once a tight spec unit may not be so today. What was once a bit noisy may be quieter now. I would not worry a lot about the different dash numbers on decades old 10811’s. Bob > On Mar 6, 2018, at 11:57 PM, Perry Sandeen via time-nuts <time-nuts@febo.com> wrote: > > List, > In getting documentation together for my HP 107BR I discovered the manuals I was able to aquire were for prefix 333. > My unit prefix is 708. Does anyone have that prefix schematics or an errata sheet? Or does the 708 prefix just designate another factory run? > TIA > Perrier > _______________________________________________ > 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.