Up through and including the 101A, only the crystal was ovenized; the oscillator itself was not temperature controlled other than via the environment in which it lived. Given that the 100 series was mostly vacuum tubes, that is understandable. I was a little surprised to discover that the solid-state 101A had only the crystal in its oven and, in fact, its specs are no better than the vacuum-tube 100E. Later models moved more and more stuff into the oven and the specs got better.
Jeremy On Sun, Apr 9, 2017 at 1:02 PM Charles Steinmetz <[email protected]> wrote: > Perry wrote: > > > The HP oscillator is a 100D Low Frequency Standard.. > > Sorry for the brain fart. > > For a bit more information on the 100D (and 100C), see the October, 1949 > Hewlett Packard Journal: > > <http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1949-10.pdf> > > Note the accuracy and stability specs: > > ACCURACY: Average stability is within approximately two parts per > million per week. > > STABILITY: Within one part per million over short time intervals, such > as required to make a measurement. > > The price in 1949 was $600 f.o.b. Palo Alto. > > Best regards, > > Charles > > > _______________________________________________ > 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. > -- Sent from Gmail Mobile _______________________________________________ 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.
