4CX300Y Datasheet, PDF (1/1 Pages) List of Unclassifed Manufacturers – Plate Dissipation (Max.) 400 Watts Screen Dissipation (Max.) 8 Watts Grid Dissipation (Max.) 1 Watt

4CX300Y/8561
The 4CX300Y/8561 is a compact power tetrode
having a maximum plate dissipation rating of 400
watts. It may be operated at maximum ratings to
110 MHz. The ceramic/metal construction and the
internally utilized electrode structure combine to
make the 4CX300Y/8561 especially durable and
free from mechanically induced noise under con-
ditions of severe acceleration caused by shock or
vibration.
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
8 Watts
1 Watt
110 MHz
5.6
Oxide Coated
6.0 Volts
3.5 Amps
Grounded Cathode
34.0 pf
4.5 pf
.04 pf
---
--- pf
--- pf
--- pf
Forced Air
Special, Breechblock
SK-700
SK-606
---
2.50 in; 63.50 mm
1.64 in; 41.60 mm
4 oz; 113 gm
Class of
Operation
C
AB1
AB1
AB1
Maximum Ratings
Typical Operation
Type of Service
RF amplifier
RF Amplifier plate modulated
RF amplifier
RF linear amplifier (AM service)
AF amplifier or modulator
Plate
Voltage
(Volts)
Plate
Current
(Amps)
2,000
0.40
1,500
0.30
2,000
0.40
2,000
0.40
2,500
0.40
Plate
Voltage
(Volts)
Screen
Voltage
(Volts)
Plate
Current
(Amps)
Drive Output
Power Power
(Watts) (kiloWatts)
2,000
250
0.40
3.8
0.600
1,500
250
0.30
1.7
0.300
2,000
400
0.38
---
0.415
2,000
400
0.20
---
0.115
2,000
400
0.75
---
0.890
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]