The 3CX3000A7 vacuum tube is a high-mu forced-air cooled power triode provides relatively high power output as an amplifier, oscillator, or modulator at low plate voltages. The tube has a low inductance cylindrical filament-stem structure which readily become part of a linear filament tank circuit for VHF operation. Operation with zero grid bias in many applications offers circuit simplicity by eliminating the bias supply. Grounded-grid operation is attractive since a power gain of over twenty times can be obtained.

The 3CX3000A7 tube is identical except for the addition of flexible leads on the base for filament and grid connections which can simplify socketing in low frequency applications.

 

 

 

Filament		Thoriated Tungsten
Filament Voltage		7.5V
Filament Current		51.5A
Capacitances (Gnd.Kath. Connection)	Input	38.0pF
	Output	0.6pF
	Feed-through	24.0pF
Capacitances (Gnd.Grid. Connection)	Input	38.0pF
	Output	24.0pF
	Feed-through	0.6pF
Amplification Factor		160
Plate Dissipation (Max.)		4000W
Grid Dissipation (Max.)		225W
Frequency for Max. Ratings(CW)		110MHz
Base		Special, coaxial
Cooling		Forced Air
Maximum Seal&Anode Core Temperature		250℃
Weight(approximate)		2.8kg
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)
C	Kathode  Driven RF Amplifier	5000	2.5	4800	1.5	435	5500+
AB2	Kathode  Driven RF Linear Amplifier	5000	2.5	4800	2.0	410	7260
AB2	Grid Driven RF Linear Amplifier AM Service	5000	2.5	4000	0.74	11.5	1130
AB2	Grid Driven AF Amplifier or Modulator	5000	2.5	4000	3.6*	115	10500
D	Switching Modulator	15000	2.5	13700	0.53	-	-