Tube Substitutions for:
1231
Pentode Amplifier
| Type | Substitutes | Base Diagram |
|---|---|---|
| 1231 | 7V7 |  |
| Web References | 1231 (Sylvania) @ Franks Electron Tubes 1231 @ RadioMuseum.org | |
Pentode Amplifier
MECHANICAL DATA
| Basing | 8V |
ELECTRICAL DATA
HEATER CHARACTERISTICS
| Heater Voltage | 6.3 | Volts |
| Heater Current | 0.45 | A |