3CX20-000A7 Datasheet, PDF (1/1 Pages) Communications & Power Industries, Inc. – Grid driven RF amplifier at 110 MHz

3CX20,000A7
The 3CX20,000A7 is a high-mu power triode in-
tended for use as a zero bias Class B RF amplifier
or Class C power amplifier or oscillator. Class B
operation with zero grid bias offers circuit simplic-
ity. In addition, grounded grid operation is attrac-
tive since a power gain as high as twenty times
can be obtained.
Characteristics
Plate Dissipation (Max.)
Screen Dissipation (Max.)
Grid Dissipation (Max.)
Frequency for Max. rating (CW)
Amplification Factor
Filament/Cathode
Voltage
Current
Capacitance
Input
Output
Feedthrough
Capacitance
Input
Output
Feedthrough
Cooling
Base
Air Socket
Air Chimney
Boiler
Length
Diameter
Weight
20,000 Watts
---
500 Watts
110 MHz
200
Thoriated Tungsten
6.3 Volts
160 Amps
Grounded Cathode
61.0 pf
0.2 pf
360 pf
Grounded Grid
61.0 pf
36.0 pf
0.2 pf
Forced Air
Coaxial
SK-1300
---
---
8.75 in; 222.20 mm
8.31 in; 211.10 mm
13.5 oz; 6.15 kg
Class of
Operation
C
C
B
AB
Maximum Ratings
Typical Operation
Type of Service
Grid driven RF amplifier at 110 MHz
Cathode driven RF amplifier at 110 MHz
Cathode driven RF amplifier TV service
at 216 MHz
Cathode driven linear amplifier at 110 MHz
Plate
Voltage
(Volts)
Plate
Current
(Amps)
10,000
5.0
10,000
5.0
10,000
6.0
10,000
6.0
Plate
Voltage
(Volts)
Screen
Voltage
(Volts)
Plate
Current
(Amps)
Drive Output
Power Power
(Watts) (kiloWatts)
7,000
---
4.0
430 21,300
7,800
---
4.2
2,300 27,500
7,200
---
5.8
1,700 27,500
7,000
---
5.0
1,540 24,200
The values listed above represent specified limits for the product and are subject to change. The data should be used for basic
information only. Formal, controlled specifications may be obtained from CPI for use in equipment design.
For information on this and other CPI products, visit our website at: www.cpii.com,
or contact: CPI MPP Division, Eimac Operations, 607 Hansen Way, Palo Alto, CA 94303
telephone: [phone]. fax: [phone] | email: [e-mail]