Tube Substitutions for:
3W4
Pentode Power Amplifier
| Type | Substitutes | Base Diagram |
|---|---|---|
| 3W4 | 3Q4, 3S4*, 3Z4, 3S4SF, 3Q4*§ |  |
| Notes: | * - Parallel filaments § - May not work in all circuits | |
| Web References | 3W4 (EIAJ) @ Franks Electron Tubes 3W4 @ RadioMuseum.org | |
Pentode Power Amplifier
MECHANICAL DATA
| Basing | 7BA |
ELECTRICAL DATA
HEATER CHARACTERISTICS
| Heater Voltage | 2.8/1.4 | Volts |
| Heater Current | 0.025/0.05 | A |