TUBE 4CM400,000A/AG

GENERAL DESCRIPTION


photo 4CM400,000A/AG The 4CM400,000A is a water-vapor cooled power tetrode designed for very-high power broadcast service to 110 MHz. The tube has a thoriated-tungsten mesh filament mounted on water-cooled supports. Maximum anode dissipation is 400 kilowatts steady state.
Large diameter coaxial terminals are used for the control grid and the RF filament terminals. Filament power and filament support cooling water connections are made through special couplings with threaded clamping rings.
The 4CM400,000AG uses a specially designed screen grid to provide improved efficiency in shortwave broadcast service.


TECHNICAL SPECIFICATIONS
Plate Dissipation (Max.) 400,000 Watts
Screen Dissipation (Max.) 7,500 Watts
Grid Dissipation (Max.) 2,000 Watts
Frequency for Max. Ratings (CW) 110 MHz
Maximum Useful Frequency (CW) 210 MHz
Cooling Vapor and Water
Filament
Voltage
Current		 Thoriated Tungsten Mesh
16.3 volts
600 amperes
Capacitances (Grounded Cath. Connection)
Input
Output
Feed-through
1,000 pF
165 pF
5.0 pF
Capacitances (Grounded Grid Connection)
Input
Output
Feed-through
450 pF
165 pF
0.7 pF
Amplification Factor (g1-g2) 4.5
Base Special Coaxial
Recommended Filament Power/Water
Connectors (2 required)		 SK-2310
Recommended Filament RF
Connector (1 required)		 SK-2315
Maximum Seal & Anode Core Temperature 200°C
Maximum Length 18.25 in; 46.36 cm
Maximum Diameter 17.03 in; 43.26 cm
Weight (approximate) 170 lb; 77.3 kg
Operating Position Vertical, base down
Specifications may change without notice

THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS
Manufacturer Transmitter specifications Power in kW
Continental Electronics 420 B 500
420 C 500


THIS TUBE IS AVAILABLE FROM
Manufacturer Rebuilder Distributor


Richardson Electronics


PRICE LEVEL (US$)
1 2 3 4 5 6
0 - 10 10 - 100 100 - 1000 1000 - 10,000 10,000 - 50,000 50,000 - 100,000