3CX3000A7 Datasheet, PDF (1/1 Pages) Communications & Power Industries, Inc. – Cathode driven RF amplifier

3CX3000A7
The 3CX3000A7 high-mu forced air cooled power
triode provides relatively high power output as
an amplifier, oscillator, or modulator at low plate
voltages. The tube has a low inductance cylindri-
cal filament tank circuit for VHF operation. Opera-
tion with zero grid bias in many applications offers
circuit simplicity by eliminating the bias supply.
Grounded-grid operation is attractive since a
power gain of over 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
4,000 Watts
---
225 Watts
110 MHz
160
Thoriated Tungsten
7.5 Volts
51.5 Amps
Grounded Cathode
38.0 pf
0.6 pf
24 pf
Grounded Grid
38.0 pf
24.0 pf
0.6 pf
Forced Air
Special, Coaxial
---
---
---
9.00 in; 228.60 mm
4.15 in; 105.50 mm
6.2 lb ; 2.8 kg
Class of
Operation
C
AB2
AB2
AB2
Maximum Ratings
Typical Operation
Type of Service
Cathode driven RF amplifier
Cathode driven RF linear amplifier
Grid driven RF amplifier linear amplifier
AM service
Grid driven AF amplifier or modulator
Plate
Voltage
(Volts)
Plate
Current
(Amps)
5,000
2.5
5,000
2.5
5,000
2.5
5,000
2.5
Plate
Voltage
(Volts)
Screen
Voltage
(Volts)
Plate
Current
(Amps)
Drive Output
Power Power
(Watts) (kiloWatts)
4,800
---
1.5
435
5.5
4,800
---
2.0
410
7.26
4,000
---
0.74
115
1.13
4,000
---
3.6
115
10.5
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]