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