3CX400A7 Datasheet, PDF (1/1 Pages) List of Unclassifed Manufacturers – Compact high-mu power triode

3CX400A7/8874
The 3CX400A7/8874 is a compact high-mu power
triode intended for use in zero bias Class B ampli-
fiers 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.
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
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
Maximum Ratings
Typical Operation
Class of
Operation
Type of Service
AB2
Cathode driven RF linear amplifier (30 MHz)
AB2
Cathode driven RF linear amplifier (150 MHz)
AB2
Cathode driven RF linear amplifier (432 MHz)
---
Pulse modulator or regulator
Plate
Voltage
(Volts)
Plate
Current
(Amps)
2,200
0.35
2,200
0.35
2,200
0.35
4,500
6.0
Plate
Voltage
(Volts)
Screen
Voltage
(Volts)
Plate
Current
(Amps)
Drive Output
Power Power
(Watts) (kiloWatts)
2,000
---
0.50
26
0.587
2,000
---
0.40
17.5 0.526
2,000
---
0.50
27
0.505
---
---
---
---
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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: [phone]. fax: [phone] | email: [e-mail]