Accession Number : AD0603222

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

Descriptive Note : Final rept. for 1 Apr 61-31 Jun 64,

Corporate Author : WHIRLPOOL CORP ST JOSEPH MICH

Personal Author(s) : Wennerberg,Allan L.

Report Date : 01 JUL 1964

Pagination or Media Count : 101

Abstract : The modification of six AN/URQ-9 Frequency Standards to include ARA-1 thermoelectric precision controlled temperature chambers is discussed. Design and fabrication techniques used on the ARA-1 chambers are presented. The temperature controllers are described and their individual functions outlined. Pertinent operational instructions are presented which include adjustment of crystal chamber temperature, early turn-off procedure, crystal replacement and crystal lead replacement. Temperature measurements made within the thermoelectrically controlled crystal chambers are discussed and graphically displayed. Frequency measurements made on the six low temperature 5 mc crystals are plotted to show their frequency stabilization period and long term aging characteristics. Frequency vs temperature curves for the low temperature crystals were determined and plotted. Performance of the six oscillators after periods of shutdown are reported and plotted. (Author)

Descriptors :   (*FREQUENCY STABILIZERS, THERMOELECTRICITY), (*TEMPERATURE CONTROL, THERMOELECTRICITY), CONTROL SYSTEMS, RADIOFREQUENCY, CRYSTAL OSCILLATORS, QUARTZ, CRYSTALS, CRYSTAL OVENS, CONTAINERS, LOW TEMPERATURE

Distribution Statement : APPROVED FOR PUBLIC RELEASE