Thanks, also consider the HP patent: http://www.google.com/patents/US3407295
On Tue, Feb 25, 2014 at 4:40 PM, Tom Van Baak <t...@leapsecond.com> wrote: > > So what's all this about a Thallium Beam Tube??? > > For info about the pro/con of Thallium beam frequency standards, see: > > http://tf.boulder.nist.gov/general/pdf/9.pdf > http://tf.boulder.nist.gov/general/pdf/211.pdf > http://leapsecond.com/history/1965-Metrologia-v1-n3-Cesium.pdf > > Imagine 21310.833946 MHz instead of 9192.631770 MHz... > > /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. > _______________________________________________ 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.