Tube Type#
1A7GT
Description
Gaseous full-wave rectifier for vibrator-type B supplies
Filament Characteristics
Heater Characteristics
Heater Voltage
None Required
Heater Current
None Required
Electrical Data
Maximum Ratings
Plate supply voltage, peak starting
300
Plate to plate voltage, peak
1000
Plate current,peak
200
Output voltage, d-c
300
Output current (min)
30
Output current (max)
75
Dynamic tube voltage drop, average
24
Characteristics and Typical Operation
Converter Service (separate excitation)
Plate Voltage
90 volts
Grid 2 voltage/use
45 volts/Signal Grid
Grid 3 voltage/use
45 volts/oscillator anode
Grid 4 voltage/use
0 volts
Grid 5 voltage/use
45 volts/oscillator anode
Grid 1 resistor/use
0.2 meg/oscillator grid
Plate Resistance, approx
0.6 meg
Converter Transductance
250 µmhos
Cathode Current
2.5 ma
Plate Current
0.6 ma
Grid 1 current/use
0.035 ma/oscillator grid
Grid 2 current/use
1.2 ma
Grid 3 current/use
0.7 ma/oscillator anode
Grid 5 current/use
0.7 ma/oscillator anode
Oscillator Characteristics, not oscillating
Plate Voltage
90 volts
Grid 1 voltage/use
0 volts/oscillator grid
Grid 2 voltage/use
90 volts
Grid 3 voltage/use
45 volts/oscillator anode
Grid 4 voltage/use
0 volts
Grid 5 voltage/use
45 volts/oscillator anode
Transconductance between Grid 1 & 2
550 µmhos
Amplification factor between Grid 1 & 2
40
Cathode current
2.2 ma