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The 3CX10000A7 is a metal ceramic, forced air cooled triode with a thoriated tungsten carbide cathode. The operating frequency is 160MHz, the anode and grid dissipation powers are 10kw and 500w. It is mainly used in audio or radio frequency equipment as a zero grid bias class B amplifier. Since the bias power supply is eliminated, the tube works under zero grid bias, which simplifies the circuit. When the grid is grounded, the tube can obtain a gain of 20 times.

Specifications:

Filament Voltage……7.5V

Filament Current……99A

Amplification Factor……200

Interelectrode Capacitances (Grounded cathode)

Input……59pF          Feedback……0.23pF Output……36Pf

Mounting……Upright, anode up or down

Cooling……forced air for core column and anode

Weight……5.5kg

Temperature at anode shell and seals……250℃

Maximum ratings:

DC Anode Voltage……8kV

DC Anode Current……5A

Anode Dissipation……10kw

Grid Dissipation……500W

Typical conditions

(grid-grounded class B RF linear amplifier)

DC Anode Voltage……7000v

Zero Signal Anode Current……0.6A

Signal Anode Current……5A

Signal Grid Current……1A