IEC 60153-3:1964 pdf download,Hollow metallic waveguides. Part 3: Relevant specifications for flat rectangular waveguides. IEC 60153-3:1964 establishes relevant specifications for flat rectangular hollow metallic waveguides. These waveguides are used to guide electromagnetic energy, particularly at microwave frequencies, through a metallic structure having a rectangular cross-section with one dimension substantially larger than the other. The standard

IEC 60151-7:1964 pdf download,Measurements of the electrical properties of electronic tubes and valves. Part 7: Measurement of equivalent noise resistance. IEC 60151-7:1964 specifies a method for measuring the equivalent noise resistance of electronic tubes and valves. Equivalent noise resistance is a parameter used to express the internal noise generated by a tube as an equivalent

IEC 60141-2:1963 pdf download,Tests on oil-filled and gas-pressure cables and their accessories – Part 2: Internal gas-pressure cables and accessories for alternating voltages up to 275 kV. IEC 60141-2:1963 specifies test requirements for internal gas-pressure cables and their accessories intended for alternating-current systems with voltages up to 275 kV. Its purpose is to verify that

IEC 60151-5:1964 pdf download,Measurements of the electrical properties of electronic tubes and valves – Part 5: Methods of measuring hiss and hum. IEC 60151-5:1964 establishes methods for measuring hiss and hum in electronic tubes and valves. These unwanted noise components can limit the sensitivity, clarity, and signal-to-noise performance of radio receivers, audio amplifiers, communication equipment,

IEC 60141-3:1963 pdf download,Tests on oil-filled and gas-pressure cables and their accessories – Part 3: External gas-pressure (gas compression) cables and accessories for alternating voltages up to 275 kV. IEC 60141-3:1963 specifies tests for external gas-pressure, or gas-compression, cables and their accessories used on alternating-current systems with voltages up to 275 kV. In this cable