TUBE 3CW20,000A7

GENERAL DESCRIPTION


photo 3CW20,000A7 The 3CW20,000A7 is a ceramic and metal power triode intended to be used as a zero-bias Class-B amplifier in audio or radio-frequency applications. Operation with zero grid bias offers circuit simplicity by eliminating the bias supply. In addition, grounded-grid operation is attractive since a power gain as high as twenty times can be obtained with the 3CW20,000A7.

The 3CW20,000A7 is electrically identical to the air-cooled 3CX10,000A7 except for its 20 kW plate dissipation rating.		 picture 3CW20,000A7


TECHNICAL SPECIFICATIONS
Plate Dissipation (Max.) 20,000 watts
Grid Dissipation (Max.) 500 watts
Frequency for Max. Ratings (CW) 110 MHz
Cooling Water and Forced Air
Filament
 Voltage
 Current		 Thoriated Tungsten
7.5 volts
99.0 amperes
Capacitances (Gnd. Cath. Connection)
 Input
 Output
 Feed-through
59.0 pF
0.2 pF
36.0 pF
Capacitances (Gnd. Grid Connection)
 Input
 Output
 Feed-through
59.0 pF
36.0 pF
0.2 pF
Amplification Factor 200
Base Coaxial
Recommended Air System Socket SK-1300
Maximum Seal Temperature 250°C
Maximum Length 11.22 in; 285.00 mm
Maximum Diameter 4.65 in; 118.10 mm
Weight (approximate) 11.5 lb; 5.2 kg
Operating Position Vertical, base up or down
Specifications may change without notice

THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS
Manufacturer Transmitter specifications Power in kW
Continental Electronics 419 F 250
419 F-2 250
419 G 250
420 B 500
420 C 500
RIZ Transmitters OR 250 K-02/A 250
OR 300 K-02/A 300
OR 500 K-01/A 500


THIS TUBE IS AVAILABLE FROM
Manufacturer Rebuilder Distributor
Eimac Econco Richardson Electronics
Penta Laboratories Kennetron


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