Tube Substitutions for:
4HA7
Twin Triode
| Type | Substitutes | Base Diagram |
|---|---|---|
| 4HA7 | 4HC7 |  |
| Web References | 4HA7 (GE) @ Franks Electron Tubes 4HA7 @ RadioMuseum.org | |
Twin Triode
MECHANICAL DATA
| Basing | 12FQ |
ELECTRICAL DATA
HEATER CHARACTERISTICS
| Heater Voltage | 4.2 | Volts |
| Heater Current | 0.6 | A |