Tube Substitutions for:
3S4SF
Pentode Power Amplifier
| Type | Substitutes | Base Diagram |
|---|---|---|
| 3S4SF | 3S4*, 3Q4*§, 3W4, 3Z4 |  |
| Notes: | * - Parallel filaments § - May not work in all circuits |
Pentode Power Amplifier
MECHANICAL DATA
| Basing | 7BA |
ELECTRICAL DATA
HEATER CHARACTERISTICS
| Heater Voltage | 2.8/1.4 | Volts |
| Heater Current | 0.05/0.10 | A |