Type | Substitutes | Base Diagram |
---|---|---|
6681 | 12AX7, 12AX7WA, 5721, 6057, 7494, 7729 | |
Web References | 6681 (RCA (HB3)) @ Franks Electron Tubes 6681 (Tung-Sol) @ Franks Electron Tubes 6681 (Sylvania) @ Franks Electron Tubes 6681 (RCA (RC30)) @ Franks Electron Tubes 6681 @ RadioMuseum.org |
Basing | 9A |
Heater Voltage | 12.6 | Volts |
Heater Current | 0.15 | A |