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Details
4CX250B has a maximum plate dissipation rating of 250 watts and a maximum input-power rating of 500 watts. The 4CX250B is designed to operate with a heater voltage of 6.0 volts.
|
Features |
Units |
Values |
|
Filament |
|
Oxide-coated Unipotential |
|
Cooling |
|
Forced Air |
|
Frequency |
MHz |
500 |
|
Plate Voltage |
kV |
6.0 |
|
Plate Current |
A |
2.6 |
|
Output Power |
kW |
0.25 |
|
Type |
|
Tetrodes |
CHARACTERISTICS：
|
Cathode
|
Oxide-coated Unipotential | |
|
Cathode Voltage
|
6.0V | |
|
Cathode Current
|
2.6A | |
|
Capacitances
(Gnd.Cath. Connection)
|
Input
|
15.7pF |
|
Output
|
4.5pF | |
|
Feed-through
|
0.04pF | |
|
Capacitances
(Gnd.Grid. Connection)
|
Input | 13.0pF |
|
Output
|
4.5pF | |
|
Feed-through
|
0.01pF | |
|
Amplification Factor
|
5 | |
|
Screen Dissipation (Max.)
|
12W | |
|
Plate Dissipation (Max.)
|
250W | |
|
Grid Dissipation (Max.)
|
2W | |
|
Recommended Air-System Socket
|
SK-600A | |
|
Recommended Air Chimney
|
SK-606 | |
|
Frequency for Max. Ratings(CW)
|
500MHz | |
|
Base
|
9-Pin Special | |
|
Cooling
|
Forced Air | |
|
Maximum Seal&Anode Core Temperature
|
250℃ | |
|
Weight(approximate)
|
113g | |
|
Operating Position
|
Any |
|
|
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
Up to 175MHz
|
2000
|
0.25 |
2000
|
0.25
|
2.9
|
390
|
300
|
|
C
|
RF Amplifier Plate Modulated Up to 175MHz
|
1500
|
0.20
|
1500
|
0.20
|
1.7
|
235
|
250
|
|
AB1
|
RF Linear Amplifier Up to 175MHz
|
2000
|
0.25
|
2000
|
0.25
|
-
|
300
|
350
|
|
AB1
|
RF Linear Amplifier(AM Service) Up to 175MHz
|
2000
|
0.25
|
2000
|
0.15
|
-
|
65+
|
350
|
|
AB1
|
AF Amplifier or Modulator
|
2000
|
0.25
|
2000
|
0.50* |
-
|
600*
|
350
|
*Two tubes
+Carrier power
