CPI 4CX350A

The 4CX350A/8321 has a maximum plate dissipation of 350 watts and is intended for Class AB
audio or RF amplifier service. The tube is externally identical to the 4CX250B but contains rugged internal construction features. Amplification
factor and cathode area have been increased over
the basic 4CX250B to give higher transconductance and figure of merit.
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
Feedthrough
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)
350 Watts
8 Watts
0 Watts
110 MHz
13
Oxide Coated
6.0 Volts
2.9 Amps
Grounded Cathode
23.6 pf
5.6 pf
.03 pf
----- pf
--- pf
--- pf
Forced Air
9 Pin Special
SK-600A
SK-606
--2.47 in; 62.60 mm
1.64 in; 41.60 mm
4 oz; 113 gm
T ypical Operation
Plate
Screen
Voltage Voltage
(Volts)
(Volts)
Plate
Current
(Amps)
Drive
Output
Power Power
(Watts) (kiloWatts)
AB1
RF linear amplifier
2,500
0.30
2,200
400
0.29
---
0.385
AB1
AF amplifier or modulator
2,500
0.30
2,200
400
0.58
---
0.770
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 | 4CX350A/ 8321
CPI | 4CW50,000J
4CX350A/8321