Title:NEW CONSTRUCTIONAL TECHNIQUES FOR RADAR EQUIPMENT [Main Title]
Film Number:TRE 157
Other titles:COLLECTION OF RADAR FILMS FROM TELECOMMUNICATIONS RESEARCH ESTABLISHMENT, MALVERN [Allocated Series Title]
Summary: A partially edited report by the Telecommunications Research establishment (TRE) on the T2061 airborne VHF transmitter/receiver (radar) equipment, which also appears to illustrate some of the operational differences when compared to previous models and equipment.
Description: - 'TRE report T 2061, 3rd Jan. 1947'
- 'New Constructional Techniques for Radar Equipment'
- 'There seems no doubt that for a given standard of performance reliability is the essential factor in operational equipments'
- 'Faults'
- 'Faults caused by bad electrical design, [and indicator showing] frequency of occurrence'
- 'Faults caused by poor control design, [and indicator showing] frequency of occurrence'
- 'Faults caused by poor wiring design, [and indicator showing] frequency of occurrence'
- 'Faults caused by vibration, [and indicator showing] frequency of occurrence'
- 'Faults caused by bad accessibility, [and indicator showing] frequency of occurrence'
- 'Faults caused by inadequate instructional books, [and indicator showing] frequency of occurrence'
- 'Faults caused by mounting of components, [and indicator showing] frequency of occurrence'
- 'Faults caused by use in excess of ratings, [and indicator showing] frequency of occurrence'
- 'Faults caused by extremes of line voltage, [and indicator showing] frequency of occurrence'
- 'Faults caused by non-type approved parts, [and indicator showing] frequency of occurrence'
- 'Faults caused by inadequate shielding, [and indicator showing] frequency of occurrence'
- 'Failure rate of components in radar equipment at RRE Malvern 1944 = 3.6%'
- '1945 = 2.9%' - '1946 = 3.6%' - '1947 = 4.5%' - '1948 = 2.1%' - '1949 = 2.4%' - '1950 = 2.1%' - '1951 = 1.0%' - '1952 = 2.3%' - '1954= 1.5%' - '1955 = 1.2%' - '1956 = 0.9%' - '1957 = 1.9%' - '1958 = 1.0%'
- 'Failure rate of components in laboratory equipments at AERE Harwell'
- '1949 = 1.2%'- '1951 = 0.59%' - '1952 = 0.72%' - '1953 = 0.67%' - '1954 = 0.65%' - '1955 = 0.58%' - '1956 = 0.96%' - '1957 = 1.05%'
- 'Environment'
- 'Effect of environmental conditions on fault rates. Under service conditions (shock, vibration, humidity, temperature extremes etc) 2.0% per 1,000 hours'
- ' Effect of environmental conditions on fault rates. Under laboratory conditions (average temperature and humidities in UK and normal handling 0.5% per 1,000 hours'
- 'Effect of environmental conditions on fault rates. Under controlled (eg. computer) conditions (temperature stabilised air conditioned installations). 0.06% per 1,000 hours'
- 'Cooling'
- 'Ten factors in designing for reliability'
- '1: avoid unnecessarily complicated circuits'
- '2: design with the operator in mind'
- '3: use carefully selected and evaluated components'
- '4: de-rate valves and components thermally and electrically'
- '5: use new design techniques - eg magnetic amplifiers to replace valve amplifiers etc
- '6: use effective constructional techniques - eg. sealing - to protect components'
- '7: temperature-control equipment where ever possible'
- '8: eliminate possible faults by adequate pre-service environmental testing'
- '9: advise 100% acceptance testing of components'
- '10: use effective storage and transit packing techniques'
- 'Microminiaturisation
- 'Packing density and estimated reliability of electronic equipments'
Alternative Title:COLLECTION OF RADAR FILMS FROM TELECOMMUNICATIONS RESEARCH ESTABLISHMENT, MALVERN [Allocated Series Title]
