Tube Substitutions for:
28D7W
Twin Beam Amplifier
| Type | Substitutes | Base Diagram |
|---|---|---|
| 28D7W | 1238 |  |
Twin Beam Amplifier
MECHANICAL DATA
| Basing | 8BS |
ELECTRICAL DATA
HEATER CHARACTERISTICS
| Heater Voltage | 28 | Volts |
| Heater Current | 0.4 | A |
| Type | Substitutes | Base Diagram |
|---|---|---|
| 28D7W | 1238 | |
| Basing | 8BS |
| Heater Voltage | 28 | Volts |
| Heater Current | 0.4 | A |