TDP
TUBE 4CX3000A / 8169


GENERAL DESCRIPTION


photo 4CX3000A The 4CX3000A is designed to be used as a Class AB1 linear amplifier in audio or radio-frequency applications. Its characteristics of low intermodulation distortion make it especially suitable for single sideband service.
This tube is unique in that a production test is included to insure minimum distortion products. The 4CX3000A must produce a minimum of 5300 watts in Class AB1 service with 3rd order IM distortion at least 32 dB down, from one tone of two-tone signal.
The tube is also recommended for use as a class C radio-frequency power amplifier and plate-modulated, radio-frequency power amplifier.


TECHNICAL SPECIFICATIONS
Plate Dissipation (Max.) 3500 watts
Screen Dissipation (Max.) 175 watts
Grid Dissipation (Max.) 50 watts
Frequency for Max. Ratings (CW) 150 MHz
Cooling Forced Air
Filament
Voltage
Current		 Thoriated Tungsten
9.0 volts
41.5 amperes
Capacitances (Grounded Cath. Connection)
Input
Output
Feed-through
-130.0 pF
12.5 pF
1.0 pF
Capacitances (Grounded Grid Connection)
Input
Output
Feed-through
61.0 pF
12.5 pF
0.1 pF
Amplification Factor (g1-g2) 5.5
Base Special, Breechblock
Recommended Air-System Socket SK-1400
Recommended Air Chimney SK-1406
Maximum Seal & Anode Core Temperature 250°C
Maximum Length 7.90 in; 200.70 mm
Maximum Diameter 4.63 in; 117.60 mm
Weight (approximate) 5.5 lb; 2.5 kg
Operating Position Vertical
Specifications may change without notice

THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS
Manufacturer Transmitter specifications Power in kW
Collins 821A-1 250
821A-2 250
Continental Electronics 417 D 50
417 E 50
418 D-2 100
418 E 100
418 F 100


THIS TUBE IS AVAILABLE FROM
Manufacturer Rebuilder Distributor
Eimac Econco Richardson Electronics
Penta Laboratories Freeland Products Thomas J. Bruckner


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