3CX20,000A7

Designed  for use as a zero-bias Class B RF amplifier or oscillator  

 

Description
Maximum Ratings
Tube Numbering System
Warranty

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Description

Plate Dissipation ( Max ) 20,000 watts
Grid Dissipation ( Max ) 500 watts
Frequency for Mas Ratings (CW) 110 watts
Cooling Forced Air
Filament Thoriated Tungsten
     Voltage 6.3 volts
     Current 160 amperes
Capacitances ( Gnd. Cath. Connection )
     Input 61.0 pF
     Output .2 pF
     Feed-through 36.0 pF
Capacitances ( Gnd. Grid Connection )
     Input 61.0 pF
     Output 36.0 pF
     Feed-through .2 pF
Amplification Factor 200
Base Coaxial
Recommened Air System Socket SK-1300 or SK-1320
Maximum Seal and Anode Core Temperature 250o C
8.75 17.75 in /  222.2 mm
Maximum Diameter 8.31 in / 211.10 mm
Weight ( approximate ) 13.5 lb / 6.15 kg
Operating Position Vertical, base up or down

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Maximum Ratings Typical Operation
Class of Operation Type of Sevice Plate Voltage (volts) Plate Current (amps) Plate Voltage (volts) Plate Current (amps) Drive Power (watts) Output Power (watts)
C Grid Driven RF Amplifier at 110 Mhz 10,000 5.0 7000 4.0 430 21,300
Cathode Driven RF Amplifier at 110 Mhz 10,000 5.0 7800 4.2 2300 27,500
B Cathode Driven RF Amplifier TV Service at 216 Mhz (two tubes) 10,000 6.0 7200 5.8 1700 27,500
AB Cathode Driven RF Linear Amplifier at 110 Mhz 10,000 6.0 7000 5.0 1540 24,200

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