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Tube Substitutions for:
1AX2
HV Half-Wave Rectifier

Type	Substitutes	Base Diagram
1AX2	1BK2, 1S2
Web References	1AX2 @ RadioMuseum.org

Sylvania Type 1AX2
HIGH VOLTAGE HALF-WAVE RECTIFIER


MECHANICAL DATA

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

ELECTRICAL DATA

FILAMENT CHARACTERISTICS

Filament Voltage1	1.4	Volts
Filament Current	650	Ma

DIRECT INTERELECTRODE CAPACITIES

Plate to Filament

0.7

��f

MAXIMUM RATINGS (Design Center Values -- Except as Noted)
Flyback Rectifier Service²

Maximum Inverse Plate Voltage Total DC & Peak	25	kV
Maximum Inverse Plate Voltage DC	20	kV
Peak Plate Current	45	Ma
Average Plate Current	0.5	Ma

CHARACTERISTICS

Tube Voltage Drop (Conducting 7 Ma)

200

Volts

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	The filament voltage should never be less then 1.2. volts or more than 1.6 volts.
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.

WARNING
This tube may produce soft X-rays which can constitute a health hazard unless adequately shielded.


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