Tube Substitutions for:
HBC91
Double Diode-Triode
| Type | Substitutes | Base Diagram |
|---|---|---|
| HBC91 | 12AT6, 12AT6A, 12AV6A, 12BK6, 12AV6 |  |
| Web References | HBC91 (Lorenz) @ Franks Electron Tubes HBC91 @ RadioMuseum.org | |
Double Diode-Triode
MECHANICAL DATA
| Basing | 7BT |
| Type | Substitutes | Base Diagram |
|---|---|---|
| HBC91 | 12AT6, 12AT6A, 12AV6A, 12BK6, 12AV6 | |
| Web References | HBC91 (Lorenz) @ Franks Electron Tubes HBC91 @ RadioMuseum.org | |
| Basing | 7BT |