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  2. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    1G5-GPower pentode; 1H4-G – Medium-mu triode, can be used as a power triode. Octal version of type 30, which is an upgraded version of type 01-A. "GT" version also available. 1H6-G – Octal version of type 1B5/25S. "GT" version also available. 1J5-G (950) – AF Power pentode; 1J6-G – Dual power triode, octal version of type 19. "GT ...

  3. Raychem - Wikipedia

    en.wikipedia.org/wiki/Raychem

    The Raychem Corporation was founded and headquartered in Menlo Park, California, in 1957 by Paul M. Cook, James B. Meikle, and Richard W. Muchmore. [1] Led by Cook and second-in-command Robert M. Halperin, Raychem became a pioneer of commercial products realized through radiation chemistry.

  4. Two-stroke power valve system - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_power_valve_system

    A stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...

  5. List of Mullard–Philips vacuum tubes - Wikipedia

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

    This is a list of European Mullard–Philips vacuum tubes and their American equivalents. Most post-war European thermionic valve (vacuum tube) manufacturers have used the Mullard–Philips tube designation naming scheme.

  6. Four-stroke power valve system - Wikipedia

    en.wikipedia.org/wiki/Four-stroke_power_valve_system

    A four-stroke power valve is a device fitted to four-stroke engines that constantly adjusts the internal diameter of the exhaust system to better suit the speed of the engine. Yamaha was the first to develop such a system, called the Exhaust Ultimate Power Valve (EXUP). [1] It first appeared on the Yamaha FZR EXUP and was later used on many ...

  7. Shape-memory coupling - Wikipedia

    en.wikipedia.org/wiki/Shape-memory_coupling

    It was first produced in the late 1960s or early 1970s by the Raychem Corporation under the trade name CryoFit. Manufacture of these couplings for aerospace hydraulic connections was later transferred to AMCI (Advanced Metal Components Inc.) and then later to Aerofit Products Inc. Additional products using the same shape-memory alloy technology ...

  8. 807 (vacuum tube) - Wikipedia

    en.wikipedia.org/wiki/807_(vacuum_tube)

    The screen voltage is the same, at 300, but its dissipation rises to 3.5 watts. 37 watts of R.F. power is produced from 220 mW of drive but only a 50% duty cycle is allowed. The maximum allowable negative control grid, g1 excursion allowable is -200 volts and average control grid current is 5mA in both A.M. and CW modes. [ 1 ]

  9. Valve audio amplifier technical specification - Wikipedia

    en.wikipedia.org/wiki/Valve_audio_amplifier...

    For triodes, it is approximately (2-3)/g m, where g m is the transconductivity. For pentodes, it is higher, about (5-7)/g m. Valves with high g m thus tend to have lower noise at high frequencies. In the audio frequency range (below 1–100 kHz), "1/f" noise becomes dominant, which rises like 1/f. Thus, valves with low noise at high frequency ...

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