METHODS FOR LOW POWER TEMPERATURE CONTROL THIRD QUARTERLY REPORT

摘要

This report describes work done from 1 November 1963 to 31 Jan-uary 1964 on an investigation of methods, techniques, and devices by which the temperature of a quartz crystal can be maintained, with a mini¬mum of power, at a nominal operating temperature over environmental tem¬perature extremes. The work includes investigation of second-order effects applicable to the design of low-power crystal ovens. End products result-ing from the study are three types of ovens: a 3-cubic inch, 500-milli-watt oven (Type J6) requiring accessibility to the crystal and operating at +75 ℃ + 1 ℃ over a -55 ℃ to +60℃ ambient; a 3-cubic-inch, reduced power, sealed oven (Type K6G) with similar operating requirements; and a 4-cubic-inch, 250-milliwatt oven (Type L6) requiring accessibility to a chamber capable of housing two crystals and operating at 0 ℃± 1℃ over a -55 ℃ to 0 ℃ ambient.