Thanks for the references, Tom. The clock portion must have been a 113. Operation at 1 kHz would certainly explain the whine.
I also remember taking a peek inside the oven and seeing an impressively large chunk of quartz. On Mon, Jun 12, 2017 at 12:45 AM, Tom Van Baak <t...@leapsecond.com> wrote: > Hi Jim, > > Maybe a version of this?: > > http://leapsecond.com/history/Benchmark.htm > > The audible (1 kc) whine was probably from the model 113 or 115. See if > any of the following pages remind you: > > http://leapsecond.com/hpclocks/ > http://www.radiomuseum.org/r/hewlett_pa_frequency_divider_and_cl.html > http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1959-11.pdf > http://hpmemoryproject.org/wb_pages/wall_b_page_01.htm > http://hpmemoryproject.org/news/2012/vintage_01.htm > > /tvb > > > > _______________________________________________ > 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. > -- --Jim Harman _______________________________________________ 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.