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Tube Substitutions for:
1AH4
RF Pentode

Type	Substitutes	Base Diagram
1AH4	1AK4, 5875, 1AK4*	1AD4
Notes:	* - Parallel filaments
Web References	1AH4 (Tung-Sol) @ Franks Electron Tubes 1AH4 @ RadioMuseum.org

Type 1AH4
RF Pentode


MECHANICAL DATA

Basing

1AD4

ELECTRICAL DATA

HEATER CHARACTERISTICS

Heater Voltage	1.25	Volts
Heater Current	0.04	A

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