Bruce Griffiths wrote: >> One concern is: > How accurate does one' thermometer which one uses to calibrate the > thermistor bridge setpoint have to be? > > Bruce
The thermistors HP used were quite accurate, so you didn't need a thermometer. You just calculated the correct resistor value for the temperature you wanted. The characterization of the crystals themselves was done in an oil bath with fairly precise thermometers, however, the accuracy only needed to be on the order of a degree C or so. This is because of the very broad peak, or plateau. It was easy to get the crystal temperature set correctly so that the electronics dominated. The fact that the electronics were not so great helped. Rick _______________________________________________ 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.
