Western electric 264 c brochure

Page 1

BELL SYSTEM PRACTICES SECTION AB46.264C
Transmission Engineering Data Issue 1, September 1950
Vacuum Tube Data A.Tr&T. Co. Standard

TRIODE
AUDIO-FREQUENCY AMPLIFIER @512! Electric

DESCRIPTION

The 264C is a filamentary type triode designed for use as an audio-frequency amplifier in
applications requiring low tube noise or high input resistance.

CHARACTERISTICS

Filament Voltage . . , . . . . . . . . . . . . . . 1.5 volts
Maximum Plate Voltage . . . . . . . . . . . . . . . 135 volts
Amplification Factor . . . . . . . . . . r . . . . . 7.2

ELECTRON TUBE DATA SHEET
FILE: GENERAL PURPOSE SECTION
10.48 2 64C

TRIODE

Page 2

264C ~ PAGE 2

GENERAL CHARACTERISTICS

ELECTRICAL DATA

Filament Voltage .
Filament Current. .
Direct Interelectrode Capacitances (without external shield)

Grid to Plate .
Input
Output .

MECHANICAL DATA

Cathode

Bulb

Base . .
Mounting Position

Dimensions and pin connections shown in outline drawing on Page 4

MAXIMUM RATINGS, Design-Center Values

Plate Voltage .
Plate Current .

1.5 volts
300 milliarnperes

4.9 uuf
3.0 uuf
2.6 uuf

Coated Filament
T9

Small 4-pin

Any

135 volts
3.5 milliamperes

TYPICAL OPERATING CONDITIONS AND CHARACTERISTICS-CLASS A. AMPLIFIER

Plate Voltage . . . . . . . . . . . . . . 60
Grid Voltage . . . . . . . . . . . . , -2
Peak A-F Grid Voltage . . . . . . . . . . . 2
Plate Current. . . . . . . . . . . . . 2.35
Transconductance 1 1 . . . . . . . . . . 620
Amplification Factor . . . . . . . . . . 1 1 73
Plate Resistance . . 1 . 1 . . . . . . . . 11700
Load Resistance . 1 . . . . . . . 23400
Maximum Signal Power Output. . . . . . . . . 2.1
Total Harmonic Distortion Less Than . . . . . . . 1

Ef=1,5 vous, D.C. ;

PLATE CURRENT IN MILLIAMPERES

GRID VOLTAGE

100 volts
-8 volts
8 volts
2.10 milliamperes
580 micromhos
7.2
12400 ohms
24800 ohms
30 milliwatts
3 per cent