Tube Substitutions for:
4BL8
Medium-Mu Triode - Sharp-Cutoff Pentode
| Type | Substitutes | Base Diagram |
|---|---|---|
| 4BL8 | 5CQ8, 5EA8, 5GH8, 5U8, 5CQ8§ |  |
| Notes: | § - May not work in all circuits | |
| Web References | 4BL8 (RCA (HB3)) @ Franks Electron Tubes 4BL8 (Tung-Sol) @ Franks Electron Tubes 4BL8 (RCA (RC30)) @ Franks Electron Tubes 4BL8 @ RadioMuseum.org | |
Medium-Mu Triode - Sharp-Cutoff Pentode
MECHANICAL DATA
| Basing | 9DC |
ELECTRICAL DATA
HEATER CHARACTERISTICS
| Heater Voltage | 4.6 | Volts |
| Heater Current | 0.6 | A |