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