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Tube Substitutions for:
5W4G
Full-Wave Rectifier

Type	Substitutes	Base Diagram
5W4G	5W4, 5W4GT, 5W4GT/G, 5AR4, 5CG4, 5R4G, 5R4GTY, 5R4GYA, 5R4GYB, 5T4, 5V4G, 5V4GA, 5V4GY, 5Y3G, 5Y3GA, 5Y3GT, 5Y3GT/G, 5Z4, 5Z4G, 5Z4GT, 5Z4GT/G, 5Z4MG
Web References	5W4G (RCA (HB3)) @ Franks Electron Tubes 5W4G (Tung-Sol) @ Franks Electron Tubes 5W4G (Triad) @ Franks Electron Tubes 5W4G @ RadioMuseum.org

RCA Type 5W4G
FULL-WAVE HIGH-VACUUM RECTIFIER

Bulb	ST-12
Base	Small Wafer Octal
Basing	5T
Mounting Position	Vertical preferred.

ELECTRICAL DATA

HEATER CHARACTERISTICS

Heater Voltage	6.3	Volts
Heater Current	1.5	Amps
Heater Positive with respect to Cathode	200	Volts (Max)
Heater Negative with respect to Cathode	200	Volts

MAXIMUM RATINGS
Full-Wave Rectifier Condenser-Input Filter

Peak Inverse Voltage	1400	Volts
Peak Plate Current Per Plate	300	Ma
A-C Plate Voltage per Plate (RMS)	350	Volts
Total Effective Plate Supply Impedence Per Plate1	25	Ohms (Min)
D-C Output Current	100	Ma

Full-Wave Rectifier Choke-Input Filter

Peak Inverse Voltage	1400	Volts
Peak Plate Current Per Plate	300	Ma
A-C Plate Voltage per Plate (RMS)	500	Volts
Input-Choke Inductance	6	Henries (Min)
D-C Output Current	100	Ma

NOTES:

1	When a filter-input condenser larger than 40�f is used, it may be necessary to use more plate-supply impedance than the minimum value shown to limit the peak plate current to the rated value.

APPLICATION
The base of the 5W4G fits the standard octal socket which should be mounted to hold the tube preferably in a vertical position. Horizontal operation is permissible if pins 2 and 8 are in a horizontal plane. Provision should be made for adequate ventilation to prevent overheating. The coated filament of the 5Y3G is designed to operate from the a-c line through a step-down transformer. The voltage at the filament terminals should be 5.0 volts under operating conditions at an average line voltage of 117 volts.


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