Accession Number:

AD0783953

Title:

Evaluation of the Thermal Characteristics of the AN/WQC-2 Final Amplifier,

Descriptive Note:

Corporate Author:

NAVAL AMMUNITION DEPOT CRANE IND

Personal Author(s):

Report Date:

1974-01-01

Pagination or Media Count:

22.0

Abstract:

An investigation was made of the thermal breakdown of eight ANWQC-2 final amplifier transistors. After extensive investigation, it was found that the ANWQC-2 system is safeguarded against final amplifier transistor failure due to overheating by a thermal interlock switch 3A4S1 mounted, essentially, on one of the final amplifier transistors 3A4Q17. In the event of a blower 3A4B1 failure the final amplifier would be protected, unless, either final amplifier transistor, 3A4Q17, or thermal interlock 3A4S1, was inoperative, then the thermal protection circuit would be defeated and thermal breakdowns imminent. Another possible final amplifier failure mode is direct overloading of the amplifier by too great of an Auxiliary 2 mode drive level, which would always lead to transistor failures. Modified author abstract

Subject Categories:

  • Electrical and Electronic Equipment
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE