3CX3000F7 Datasheet, PDF (1/1 Pages) Communications & Power Industries, Inc. – Cathode driven RF amplifier

3CX3000F7 / 8162
The 3CX3000F7/8162 high-mu forced air cooled
power triode provides relatively high power out-
put as an amplifier, oscillator, or modulator at low
plate voltages. The tube has a low inductance
cylindrical filament tank circuit for VHF operation.
Operation with zero grid bias in many applica-
tions offers circuit simplicity by eliminating the
bias supply. Grounded-grid operation is attrac-
tive since a power gain of over twenty times can
be obtained. The 3CX3000F7/8162 tube is identi-
cal to the 3CX3000A7 except for the addition of
flexible leads on the base for grid and filament
connections which can simplify socketing in low
frequency applications
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
4,000 Watts
---
225 Watts
30 MHz
160
Thoriated Tungsten
7.5 Volts
51.5 Amps
Grounded Cathode
38.0 pf
0.6 pf
24 pf
Grounded Grid
38 pf
24.0 pf
0.6 pf
Forced Air
Special with Flying leads
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---
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18.437 in; 468.30 mm
4.15 in; 105.50 mm
7.0 lb; 3.2 kg

Maximum Ratings Typical Operation
Class of Type of Service Plate Plate Plate Screen Plate Drive Output
Operation
Voltage Current
Voltage Voltage Current Power Power

(Volts) (Amps)
(Volts) (Volts) (Amps) (Watts) (kiloWatts)
C Cathode Driven RF amplifier
5,000
2.5
4,800
---
1.5
435
5.5
AB2
RF Linear Amplifier
5,000
2.5
4,800
---
2.0
410
7.26
AB2 Grid Driven RF Linear Amplifier
AM Service
5,000
2.5
4,000
---
0.74
115
1.13
AB2 Grid Driven AF Amplifier or Modulator
5,000
2.5
4,000
---
3.6
115
10.5
D Switching Modulator
15,000
2.5
13,700
---
0.53
---
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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 MPP products, visit our website at: www.cpii.com,
or contact: CPI Microwave Products Division, Eimac Operation, 607 Hansen Way, Palo Alto, CA 94303
telephone: [phone]. fax: [phone] | email: [e-mail]