8973 Datasheet, PDF (1/1 Pages) Communications & Power Industries, Inc. – RF Amplifier

8973
The 8973 is a power tetrode designed for very
high powered medium frequency or high frequen-
cy broadcast service and a very low frequency
communication in the half megawatt power range.
The 8973 has a thoriated tungsten filament mount-
ed on water-cooled supports. Large diameter
coaxial terminals are used for the control grid and
the RF filament terminals. Filament power and fila-
ment support cooling water connections are made
through special couplings with threaded clamping
rings.
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
1,000 Kilowatts
7.5 Kilowatts
2.0 Kilowatts
110 MHz
4.5
Thoriated Tungsten
16.3 Volts
600 Amps
Grounded Cathode
1000 pf
165 pf
5.0 pf
N/A
N/A
N/A
N/A
Water and Forced Air
Special Coaxial
N/A
N/A
N/A
18.75 in; 476.20 mm
17.03 in; 432.60 mm
153.0 lb; 69.5 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
RF Amplifier
C
RF Amplifier Plate Modulated
AB1
RF Linear Amplifier
AB1 AF Amplifier or Modulator
B
RF Amplifier, Long Pulse, Grounded Grid
22,500
17,500
22,500
22,500
1,000
65.0
50.0
110.0
110.0
000
21,000 1,500
59.0
2,700 1,025.0
17,500
800
50.0 2,400 700.0
20,000 1,500
45.0
---
610.0
17,500 1,500
78.0
---
950.0
24,500 1,750
94.2
7,140 1,770.0
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]