Electron Tubes for Industrial, Broadcast and Ham Radio Applications
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7T85RB
|
Filament
|
Thoriated
Tungsten
|
|
Filament
Voltage
|
6.3V
|
|
Filament
Current
|
35.0A
|
|
Capacitances
(Gnd.Kath.
Connection)
|
15.0pF
|
35.0pF
|
|
0.5pF
|
0.9pF
|
|
13.0pF
|
20.0pF
|
|
Amplification Factor
|
21
|
|
Frequency
for Max. Ratings (CW)
|
110MHz
|
|
Transconductance
|
5mS
|
|
Cooling
|
Forced Air
|
|
Maximum
Seal&Anode Core Temperature
|
250℃
|
|
Weight
(approximate)
|
1.5kg
|
|
Operating
Position
|
Vertical,
base up or down
|
Max.
Ratings (Class C)
|
|
Continuous
Service
|
Intermittent
Service
|
|
Plate
Voltage (kV)
|
8.0
|
8.5
|
|
Plate
Current (A)
|
1.0
|
1.2
|
|
Grid Current
(A)
|
0.3
|
0.35
|
|
Plate
Dissipation(kW)
|
2.5
|
2.5
|
|
Grid
Dissipation(W)
|
130
|
150
|
TYPICAL OPERATION（RF
Power Amplifier or Oscillator, Class C)
|
|
Continuous
Service
|
Intermittent
Service
|
|
Plate
Voltage (kV)
|
7.5
|
8
|
|
Plate
Current (A)
|
0.9
|
1
|
|
Output Power
(kW)
|
5.1
|
6
|
|
Grid Current
(A)
|
0.2
|
0.25
|
|
Grid
Impedance(Ω)
|
4500
|
4500
|
Note: The
Intermittent Service means that the working time is 10s, and the
duty factor is 50%.
GREENSTONE USA
Copyright © 2001 GREENSTONE USA All rights reserved.
Revised:
October 20, 2010
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