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The 833A is a vacuum tube constructed for medium power oscillator or class B or C amplifier applications. It is a medium-mu power triode with 300 watts CCS or 350 watts ICAS anode dissipation. The long grid and anode leads, plus high internal capacitance, limits this tube to 15-30 MHz maximum frequency. Being medium mu, it is normally not suitable for grounded grid operation. == Specifications == The 833A is a large tube of the type sometimes known as a "cookie jar" tube,〔Rosenberg, Harvey. (Pathways to Power ).〕 with the envelope nominally measuring 116.8 mm (4.60 in.) in diameter and 219.2 mm (8.63 in.) in height. The 833A contains a thoriated tungsten filament rated at 10 volts and 10 amps. A pair of 833A's with adequate forced air cooling can deliver 1000 watts of CCS RF power operating as a class C amplifier plate modulated stage. A pair of tubes used in a class B modulator can deliver 1800 watts of "peak" AF power in ICAS service with speech, or 1600 watts in CCS service with music or high duty cycle operation. Two 833A's are capable of approximately 800 watts sine wave power in a class B audio amplifier or modulator. This assumes approximately 58% efficiency, 1400 watts input, and 300 watts per tube anode dissipation. The anode normally shows a dull to medium red color when operating at full power.〔RCA Transmitting Tubes, TT5, 1962〕 The tube is supported solely by its two filament posts. These posts are keyed with the F1 and F2 connection having a diameter of 9.5 mm (0.375 in) and 11.1 mm (0.438 in) respectively. The 833A was preceded by the 833.〔RCA Transmitting Rubes, TT3, 1938〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「833A」の詳細全文を読む スポンサード リンク
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