5681K Datasheet, PDF (1/1 Pages) Communications & Power Industries, Inc. – CW oscillator or amplifier

5681K
The 5681K is a high power triode suitable for
industrial and broadcast applications as well as
other applications where a 75 kW water cooled
anode is desirable. The 5681K uses ceramic as the
vacuum envelope for ruggedness and high reli-
ability. At reduced ratings the 5681K is useful up
to 88 MHz.
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
75,000 Watts
N/A
1200 Watts
30 MHz
25
Thoriated Tungsten
12.0 Volts
220 Amps
Grounded Cathode
79 pf
60 pf
2.4 pf
pf
pf
pf
Water and Forced Air
Special
N/A
N/A
N/A
19.75 in; 50.2 Cm
8.03 in; 20.4 Cm
43 lb; 19.5 kg
Class of
Operation
C
C
Maximum Ratings
Typical Operation
Type of Service
CW oscillator or amplifier
Plate modulated RF amplifier (telephony)
Plate
Voltage
(Volts)
Plate
Current
(Amps)
15,000
12
10,000
9.0
Plate
Voltage
(Volts)
Screen
Voltage
(Volts)
Plate
Current
(Amps)
Drive Output
Power Power
(Watts) (kiloWatts)
14,000 500
1.6
52
8.5
10,000
n/a
7.4
2100
57.0
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 products, visit our website at: www.cpii.com,
or contact: CPI MPP Division, Eimac Operation, 607 Hansen Way, Palo Alto, CA 94303
telephone: [phone]. fax: [phone] | email: [e-mail]