Tube Substitutions for:
4HA5
High-Mu Triode
| Type | Substitutes | Base Diagram |
|---|---|---|
| 4HA5 | 4HK5†, 4HQ5, 4HM5, 4HQ5 |  |
| Notes: | † - Series circuit no controlled warm-up | |
| Web References | 4HA5 (RCA (RC30)) @ Franks Electron Tubes 4HA5 @ RadioMuseum.org | |
High-Mu Triode
MECHANICAL DATA
| Basing | 7GM |
ELECTRICAL DATA
HEATER CHARACTERISTICS
| Heater Voltage | 3.9 | Volts |
| Heater Current | 0.3 | A |