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  2. List of Mullard–Philips vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_Mullard–Philips...

    ECC81, 82 & 83 have the individual triode heaters internally series-connected, with the midpoint on a separate pin, so they could be run on both 6.3 V and 12.6 V (hence RETMA lists them as 12V types), which was useful in dual-system (6V and 12V) car radios

  3. Mullard–Philips tube designation - Wikipedia

    en.wikipedia.org/wiki/Mullard–Philips_tube...

    [1] [2] Two or more elements in a single envelope were handled by adding letters after the heater identifier, in alphabetical order, so an ECH35 is a 6.3 volt heated triode plus a hexode with an octal base; a PABC80 is a Noval 300mA series-heater combination of a single low-power diode A, a pair of diodes with common cathode B, and a triode C.

  4. Fluorescent-lamp formats - Wikipedia

    en.wikipedia.org/wiki/Fluorescent-lamp_formats

    Like the European modular furniture, display cabinets, ceiling tile grids, etc. they were designed for, these are based on multiples of the 300 mm (11.8 in) "metric foot" instead of the 12 in (305 mm) imperial foot, but are all 37 mm (1.5 in) shorter to allow space for the lampholder connections within the 300 mm modular units, and for much ...

  5. Power dividers and directional couplers - Wikipedia

    en.wikipedia.org/wiki/Power_dividers_and...

    Directional couplers are frequently symmetrical so there also exists port 4, the isolated port. A portion of the power applied to port 2 will be coupled to port 4. However, the device is not normally used in this mode and port 4 is usually terminated with a matched load (typically 50 ohms). This termination can be internal to the device and ...

  6. Attack of the 50 Ft. Woman (1993 film) - Wikipedia

    en.wikipedia.org/wiki/Attack_of_the_50_Ft._Woman...

    Attack of the 50 Ft. Woman is a 1993 American science fiction comedy television film and is a remake of the 1958 film Attack of the 50 Foot Woman.Directed by Christopher Guest and starring Daryl Hannah and Daniel Baldwin, the film premiered on HBO on December 11, 1993, and was later released theatrically in the United Kingdom, France and Germany.

  7. Convair B-36 Peacemaker - Wikipedia

    en.wikipedia.org/wiki/Convair_B-36_Peacemaker

    Until the B-52 became operational, the B-36 was the only means of delivering the first generation Mark 17 hydrogen bomb, [29] 25 ft (7.6 m) long, 5 ft (1.5 m) in diameter, and weighing 42,000 lb (19,000 kg), the heaviest and bulkiest American aerial nuclear bomb. The Mark 17 took up the aircraft's two aft bomb bays, while the forward bay could ...

  8. Land Rover 1/2 ton Lightweight - Wikipedia

    en.wikipedia.org/wiki/Land_Rover_1/2_ton_Lightweight

    The Lightweight 1/2 ton was a British military vehicle supplied by Land Rover. It was a vehicle designed to be light enough to be carried by the Westland Wessex, a medium-lift helicopter in service for over 40 years with the U.K armed services. It was produced from 1968 to 1984, and served widely internationally and in private use.

  9. Sigma 18–50mm f/2.8 EX DC Macro lens - Wikipedia

    en.wikipedia.org/wiki/Sigma_18–50mm_f/2.8_EX_DC...

    The Sigma 18-50mm f / 2.8 EX DC Macro is a wide to normal angle, zoom lens made by the Sigma Corporation. The lens is produced in Canon EF mount , Four Thirds System , Nikon F-mount , Pentax K mount , the SA mount , and the Sony/Minolta AF Mount varieties, all have the same optical formula.