3CW20000A7 Datasheet, PDF (1/1 Pages) Communications & Power Industries, Inc. – The 3CW20,000A7 is a high-mu power triode

3CW20,000A7
The 3CW20,000A7 is a high-mu power triode in-
tended to be used as a zero bias Class B amplifier
in audio or radio frequency applications. Opera-
tion with zero-grid bias offers circuit simplicity by
eliminating the bias supply. In addition, grounded
grid operation is attractive since a power gain
as high as twenty times can be obtained. The
3CW20,000A7 is electrically identical to the air-
cooled 3CX10,000A7 except for its 20kW plate
dissipation rating.
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
7.5 Volts
99.0 Amps
Grounded Cathode
59.0 pf
0.2 pf
36 pf
Grounded Grid
59.0 pf
36.0 pf
0.2 pf
Water and Forced Air
Coaxial
SK-1300
---
---
11.22 in; 285.00 mm
4.65 in; 118.10 mm
11.5 lb; 5.2 kg
Class of
Operation
C
C
B
B
Maximum Ratings
Typical Operation
Type of Service
Grid driven RF amplifier
Grid driven RF amplifier plate modulated
Cathode driven RF linear amplifier
Cathode driven RF linear amplifier
Plate
Voltage
(Volts)
Plate
Current
(Amps)
7,000
4.0
5,500
3.0
7,000
5.0
7,000
5.0
Plate
Voltage
(Volts)
Screen
Voltage
(Volts)
Plate
Current
(Amps)
Drive Output
Power Power
(Watts) (kiloWatts)
7,000
---
4.0
530
21.3
5,000
---
3.0
380
11.9
7,000
---
5.0
1,540 24.2
7,000
---
2.4
330
5.65
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]