The 4CX3000A / 8169 vacuum tube 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.The 4CX3000A / 8169 vacuum tube must produce a minimum of 5300 watts in Class AB1 service with 3rd order IM distortion at least 32dB down from one tone of two signal.

 

The tube is also recommended for use as a Class C radio-frequency power amplifier and plate-modulated, radio-frequency.

 

 

 

Filament		Thoriated Tungsten
Filament Voltage		9.0V
Filament Current		41.5A
Capacitances (Gnd.Kath. Connection)	Input	-1300pF
	Output	12.5pF
	Feed-through	1.0pF
Capacitances (Gnd.Grid. Connection)	Input	61.0pF
	Output	12.5pF
	Feed-through	0.1pF
Amplification Factor		5.5
Screen Dissipation (Max.)		175W
Plate Dissipation (Max.)		3500W
Grid Dissipation (Max.)		50W
Frequency for Max. Ratings(CW)		150MHz
Base		Special, coaxial
Cooling		Forced Air
Maximum Seal&Anode Core Temperature		250℃
Weight(approximate)		2.5kg
Operating Position		Vertical, base up or down

Class of Operation	Type of Service	Max. Ratings		TYPICAL OPERATION
		Plate Voltage (V)	Plate Current (A)	Plate Voltage (V)	Plate Current (A)	Drive Power (W)	Output Power (W)	Screen Voltage (volts)
C	RF Amplifier At 30 MHZ	7000	2.0	7000	1.9	41	11000	500
C	RF Amplifier Plate Modulated at 30MHZ	5000	1.4	5000	1.4	31	5750	500
AB	RF Linear Amplifier	7000	2.0	5000	1.7	-	5300+	850
AB	AF Amplifier or Modulator	6000	2.0	6000	3.1*	-	12400*	850