Accession Number : AD0430292


Title :   THERMOELECTRIC TEMPERATURE CONTROL IN AN/URQ-9 FREQUENCY STANDARD.


Descriptive Note : Interim development rept. no. 11, 1 Oct-31 Dec 63,


Corporate Author : WHIRLPOOL CORP ST JOSEPH MICH


Personal Author(s) : Wennerberg,A L


Report Date : 15 Jan 1964


Pagination or Media Count : 30


Abstract : Temperature stability measurements within the thermoelectrically controlled temperature crystal chamber were made with high accuracy. Temperature was found to be controlled to within = 0.01 degrees C of the set point. Frequency measurements made on six l w temperature 5 mc crystals are plotted to show their frequency stabilization period and long term aging characteristics. Long term drift rates of precision oscillators coupled to the low temperature crystals were found to be within several parts in 10 to the -11th power per day. Turning-point curves for two of the low temperature crystals w re determined and plotted. Performance of the six oscillators after periods of shutdown are reported. The units showed a short stabilization period of a few hours and then went into a new aging curve. (Author)


Descriptors :   *CRYSTAL OVENS , *TEMPERATURE CONTROL , STABILITY , THERMOELECTRICITY , MEASUREMENT , CRYSTAL OSCILLATORS , QUARTZ RESONATORS , RADIOFREQUENCY , STANDARDS , FREQUENCY STABILIZERS


Distribution Statement : APPROVED FOR PUBLIC RELEASE