1A7GT

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

 

Posted in Categories: Vacuum Tube.

Last modified: July 25, 2024