Western electric 345 a brochure

Page 1

BELL SYSTEM PRACTICES SECTION A346.345A
TRANSMISSION ENGINEERING AND DATA ISSUE I, AUGUST I943
ELECTRON TUBE DATA ATE-T. CO. STANDARD

RECTIFIER
FULL-WAVE, HIGH VACUUM Western Electric

DESCRIPTION

The 345A is a full-wave rectifier with indirectly heated cathodes. It is designed to
. supply direct current from an alternating current source or to rectify radio-frequency
currents for feedback purposes in broadcast transmitters.

CHARACTERISTICS
Heater Voltage I . . . , . . , I 6.3 volts

. Maximum Plate Voltage (RMS) per Plate . . 400 volts
Maximum D-C Output Current . . , I , . I . . 100 milliamperes
ELECTRON TUBE DATA SHEET I
FILE: RECTIFIER SECTION

1-48 C

Page 2

345A - PAGE 2

GENERAL CHARACTERISTICS

ELECTRICAL DATA

Heater Voltage
Heater Current

MECHANICAL DATA

Cathode

Bulb

Base

Mounting Position

Dimensions and pin connections shown in outline drawing on Page 4

MAXIMUM RATINGS, Design-Center Values

Peak Inverse Voltage

Peak Plate Current per Plate

Peak Transient Plate Current per Plate
Peak Heater-Cathode Voltage

With Choke-Input Filter:
A-C Plate Voltage per Plate (RMS)
D-C Output Current
Minimum Input-Choke Inductance

With Condenser-Input Filter:
A- C Plate Voltage per Plate (RMS)
D- C Output Current
Minimum Total EHective Plate-Supply Impedance per Plate

TYPICAL OPERATING CONDITIONS

With Choke-Input Filter:
A- C Plate Voltage per Plate (RMS)
D- C Output Current
D- C Output Voltage. Approximate, at Input to Filter
Filter Input Choke

With Condenser-Input Filter:
A-C Plate Voltage per Plate (RMS)
D-C Output Current
D-C Output Volts, Approximate, at Input to Filter
Total Effective Plate-Supply Impedance per Plate
Filter Input Condenser

6.3 volts
1.0 ampere

Coated unipotential

ST12

Small 5-pin

Any

1250
300
1.0
450

400
100

350
100
75

350
100
290

300
90
340
150
4

volts
milliamperes
ampere

volts

volts
milliamperes
henrys

volts
milliamperes
ohms

volts
milliamperes
volts

henrys

volts
milliamperes
volts

ohms
microfarads