The 12BV7, 12BY7, 12BY7A, and equivalents were a class of medium-low gain, pentode vacuum tube amplifiers using the Noval socket configuration. Although originally marketed as pentode tubes for use in early television receivers, they found additional uses in audio and radiotelephone equipment. The series shares the EIA 9BF pinout with a number of other miniature pentode tubes of the era.
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| - The 12BV7, 12BY7, 12BY7A, and equivalents were a class of medium-low gain, pentode vacuum tube amplifiers using the Noval socket configuration. Although originally marketed as pentode tubes for use in early television receivers, they found additional uses in audio and radiotelephone equipment. The series shares the EIA 9BF pinout with a number of other miniature pentode tubes of the era. (en)
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cathode type
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class a amplification factor
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class a anode current
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class a screen voltage
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pinout
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- Pin 1, Cathode (en)
- Pin 2, Grid 1 (en)
- Pin-3, Internal Shield / Grid 3 (en)
- Pin-4, Heater (en)
- Pin-5, Heater (en)
- Pin-6, Heater Center Tap (en)
- Pin-7, Plate (en)
- Pin-8, Grid 2 (en)
- Pin-9, Internal Shield / Grid 3 (en)
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caption
| - General Electric 12BY7A vacuum tube (en)
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| - The 12BV7, 12BY7, 12BY7A, and equivalents were a class of medium-low gain, pentode vacuum tube amplifiers using the Noval socket configuration. Although originally marketed as pentode tubes for use in early television receivers, they found additional uses in audio and radiotelephone equipment. The series shares the EIA 9BF pinout with a number of other miniature pentode tubes of the era. The most successful tube in this series, 12BY7A was introduced by General Electric in June 1955 as a demodulated video signal amplifier for television receivers. Its design specifications called for linear gain along a wide bandwidth (approximately 4 MHz) with low transconductance (13 Millimhos (Millisiemens)) and high sensitivity. This combination of sensitivity, bandwidth and price lead to its popularity in audio amplification systems during the tube era. (en)
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