CPI ML-6421F

The ML-6421F and 6421F are medium-Mu triodes
used in AM broadcast and industrial heating
applications. The air-cooled anode is rated at 10
kilowatts.
Class of Operation
Characteristics
Plate Dissipation (Max.)
Screen Dissipation (Max.)
Grid Dissipation (Max.)
Frequency for Max. rating (CW)
Amplification Factor
Filament/Cathode
Voltage
Current
Capacitance
Input
Output
Cgp
Capacitance
Input
Output
Feedthrough
Cooling
Base
Air Socket
Air Chimney
Boiler
Length
Diameter
Weight
Maximum Ratings
Type of Service
Plate Voltage
(Volts)
Plate
Current
(Amps)
10,000 Watts
N/A
375 Watts
30 MHz
20
Thoriated Tungsten
7.0 Volts
85 Amps
Grounded Cathode
30 pf
2.0 pf
19 pf
N/A
pf
pf
pf
Water and Forced Air
Special
N/A
N/A
14.5 in; 36.8 cm
8.25 in; 21 cm
30 lb; 13.6 kg
T ypical Operation
Plate
Screen
Voltage Voltage
(Volts)
(Volts)
Plate
Current
(Amps)
Drive
Output
Power Power
(Watts) (kiloWatts)
C
Industrial Oscillator
10,000
2.2
8,000
-700
1.0
100
6.1
C
Industrial Oscillator
10,000
2.2
9,000
-750
2.0
240
13.2
C
Plate modulated RF amplifier (telephony)
8,000
1.8
6,000
-800
1.25
270
5.9
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 : 1(800) 414-8823. fax : (650) 592-9988 | email : powergrid@cpii.com
CPI | ML-6421F/ 6421F
CPI | 4CW50,000J
ML-6421F/6421F