Western electric 102 d brochure

Page 1

BELL SYSTEM PRACTICES SECTION AB46.102D
Transmission Engineering Data Issue 1, January 1950
Vacuum Tube Data AT,&T. Co. Standard

TRIODE .
AUDIO-FREQUENCY AMPLIFIER lye-579171 157961776

DESCRIPTION

The 102D is a filamentary type triode. It is designed for use as an audio-frequency
voltage amplifier or modulator.

CHARACTERISTICS

Filament Current . r . . . . . . . . . . . . . . 1.0 ampere
Maximum Plate Voltage . . , . . i . . . . . . . . 180 volts
Amplification Factor . . . _ A . r r . i i . . . 30

ELECTRON TUBE DATA SHEET
FILE: GENERAL PURPOSE SECTION
6-49 02 D

TRIODE

Page 2

1020 - PAGE 2

GENERAL CHARACTERISTICS

ELECTRICAL DATA

Filament Current . . . . . . . . . . . . . . . . . 1.0 ampere
Filament Voltage, Nominal . I . . . . . . . . . . . . 2.1 volts
Direct Interelectrode Capacitance: Without external
shield
Grid to Plate . . . . . . . I . . . . . . . . . 5.4 uuf
Input . . . . . . . . . . . . . . . . . . . . 4.1 uuf
Output . . . . . . . . . . . . . . . . . . . 2.6 uuf

MECHANICAL DATA

Cathode . . . . . . . . . . . . . . . . . . Coated Filament
Base . . . . . . . I . . . . Medium 4-pin type with bayonet pin
Mounting Position . . . . . . . . Preferably vertical; if horizontal, pins #1

and #2 must lie in same vertical plane
Dimensions and pin connections shown in outline drawing on Page 5

MAXIMUM RATINGS, Deslgn-Center Values

Plate Voltage . . I . . . I I . . . . . . . . . 180 volts
Plate Dissipation . . . . . . . . . . . . . . . . 0.5 watt
Plate Current . . I I . . . . . . . . . . . . . 7.5 milliamperes

TYPICAL OPERATING CONDITIONS AND CHARACTERISTICS-CLASS AI AMPLIFIER

Filament Current1 D-C . . . . . . . . . . . 1.0 1.0 ampere
Plate Voltage . . , . . . . . I . . . . 130 160 volts

Grid Voltage . t . . . . . . . . . . . -l.5 -2.0 volts
Peak A-F Grid Voltage . . . . . . . . . . . 1.5 2.0 volts

Plate Current , . . . , . . . . . . t . 0.65 037 milliampere
Transconductance . . . . . . . . . . . . 500 560 micromhos
Amplification Factor . . . . . . . . . . . 29.9 29.9

Plate Resistance . . . . . . . . . . . . 60000 53500 ohms
Load Resistance . . . . . . . . . . . . 300000 300000 ohms
Maximum-Signal Voltage Output . . . . . . . . 29 37 peak volts
Total Harmonic Distortion Less Than . . . . . . 1.0 1.0 per cent

Tbe filament resistance of this tube increases slightly during the first year of operating life.
The voltage given above is the nominal value after the filament resistance has stabilized.