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Tube Substitutions for:
1X2B
HV Half-Wave Rectifier

Type	Substitutes	Base Diagram
1X2B	1BX2, 1X2-C
Web References	1X2B (RCA (HB3)) @ Franks Electron Tubes 1X2B (General Electric) @ Franks Electron Tubes 1X2B (Tung-Sol) @ Franks Electron Tubes 1X2B @ RadioMuseum.org

Sylvania Type 1X2B
H-V HALF-WAVE RECTIFIER


MECHANICAL DATA

Bulb	T-61/2
Outline	6A-2
Base	Small Button 9-Pin
Basing	9Y
Top Cap	Skirted Miniature
Mounting Position	Any

ELECTRICAL DATA

FILAMENT CHARACTERISTICS

Filament Voltage A C	1.25	Volts
Filament Current	200	Ma

DIRECT INTERELECTRODE CAPACITANCES

Plate to Filament

1.0

��f

MAXIMUM RATINGS (Design Center Values)
Flyback Rectifier Service²

Peak Inverse Plate Voltage (Abs. Max.)	22	kV
Steady State Peak Plate Current	45	Ma
D C Output Current	0.5	Ma
Tube Voltage Drop for Ib=7 Ma	100	Volts

CHARACTERISTICS AND TYPICAL OPERATION
Flyback Rectifier Service²

Positive Peak Plate Voltage	18	kV
Negative Peak Plate Voltage	2.0	kV
D C Output Voltage (approx.)	18	kV
D C Output Current (approx.)	100	�a
Peak Plate Current	35	Ma

NOTES:

1	Pins 3 and 7 can be used as a tie point for the filament dropping resistor and high voltage resistor. Do not connect to the low voltage circuits.
2	For operation in a 525 line, 30 frame system, the duty cycle of the voltage pulse must not exceed 15% of one scanning cycle.

APPLICATION
Sylvania Type 1X2B is a miniature filament type diode designed for use as a high voltage rectifier in television receivers and other high voltage rectifier applications. It is applicable for use in both flyback and r f types of supplies as well as for use at power line frequency. The 1X2B supersedes the 1X2 and 1X2A which are identical except for lower Peak Inverse Plate Voltage.


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