Western electric 101 m brochure

Page 1

BELL SYSTEM PRACTICES SECTIION 1A?46.1Ol19I5V(I)
' ' ssue , anuary
gzgifis'ige Iglaineenng Data AyT.&T. Co. Standard

£12

TRIODE ,
AUDIO-FREQUENCY AMPLIFIER WSW! £136,776

DESCRIPTION

The 101M is a filamentary type triode. It is designed for use as an audio-frequency
amplifier or modulator. This tube is intended for use in equipment where quick filament
heating is required. Better thermionic life will be obtained by using other types of the 101
series of tubes when filament heating time is not a factor.

CHARACTERISTICS

Filament Current . . . . . . . . . . . . . . 250 milliamperes
Maximum Plate Voltage . . , . . . . . . . . . . 180 volts
Amplification Factor . u . . . . . . . u . . 6.5

ELECTRON TUBE DATA SHEET
FILE: GENERAL PURPOSE SECTION '0' M
6-49

TRIODE

Page 2

IO'IM- PAGE 2

GENERAL CHARACTERISTICS

ELECTRICAL DATA

Filament Current .

Filament Voltage, NominaP .
Direct Interelectrode Capacitances

Grid to Plate
Input
Output

MECHANICAL DATA

Cathode
Base , .
Mounting Position ,

250 milliamperes
3.75 volts

without external
shield

6.0 uuf
3.9 uuf
2.8 uuf

. . . . . Coated Filament
NIedium 4-pin type with bayonet pin
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, Design-Center Values

Plate Voltage . . . a . . . . . . . . . . . . . 180 volts
Plate Dissipation . . . . . . . . . . . . . . . 2.0 watts
Plate Current . . . . . . . , . . . a . . . . . 15 milliamperes

TYPICAL OPERATING CONDITIONS AND CHARACTERISTICS-CLASS AI AMPLIFIER

Filament Current, D-C , o . . . . . . . . . 250 250 milliamperes
Plate Voltage. . . . . , . , . . . . . . V 130 160 volts

Grid Voltage . . . . . . . . . . . . . . -8 -10 volts

Peak A-F Grid Voltage , . i . . . . . . . . . 8 10 volts

Plate Current . . l . . . . . . . . . . . 6.8 10.2 milliamperes
Transconductance . , . o , . . . . . . . 1080 1240 micromhos
Amplification Factor . , , t . . . . . . . 6.5 6.5

Plate Resistance . . o . . . . . . . . . . . 6000 5200 ohms

Load Resistance . . . . o . . . . . . . . . 6000 5200 ohms
.\'Iaximum Signal Power Output . . . . . . . . . 60 100 milliwatts
Total Harmonic Distortion . . . . . . . . . . 3.4 3.2 per cent

"Ihe 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.