ETC 3CX400A78874

The 3CX400A7/8874 is a compact high-mu power
triode intended for use in zero bias Class B amplifiers in audio or RF applications. Operation with
zero bias simplifies circuitry and cathode driven
operation is attractive since a power gain as high
as twenty can be obtained.
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)
400 Watts
--5 Watts
500 MHz
240
Oxide Coated
6.3 Volts
3.0 Amps
Grounded Grid
20.5 pf
6.0 pf
0.3 pf
----- pf
--- pf
--- pf
Forced Air
11 pin with ring
SK-1900
SK-606
--2.14 in; 54.40 mm
1.64 in; 41.70 mm
4.3 oz; 122 gm
T ypical Operation
Plate
Screen
Voltage Voltage
(Volts)
(Volts)
Plate
Current
(Amps)
Drive
Output
Power Power
(Watts) (kiloWatts)
AB2
Cathode driven RF linear amplifier (30 MHz)
2,200
0.35
2,000
---
0.50
26
0.587
AB2
Cathode driven RF linear amplifier (150 MHz)
2,200
0.35
2,000
---
0.40
17.5
0.526
AB2
Cathode driven RF linear amplifier (432 MHz)
2,200
0.35
2,000
---
0.50
27
0.505
---
Pulse modulator or regulator
4,500
6.0
---
---
---
---
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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 : 1(800) 414-8823. fax : (650) 592-9988 | email : powerg[email protected]
CPI | 3cX400A7/ 8874
CPI | 4CW50,000J
3CX400A7/8874