The 12AU7 (European type ECC82) is a twin medium-μ triode tube with a center-tapped filament for use in either 6.3 V / 300 mA or 12.6 V / 150 mA heater circuits. It is likely the first tube manufactured with a B9A (Noval) miniature 9-pin base (from 1946).
The 5814 is a high-rel version with increased heater current.
Tek part number: 154-0041-00, 154-0287-00
|Aged/Checked/Matched Pair Details|
|Used in||Tek Part#||S/N Range|
|Type C Plug-in (V3203,V4203)||157-0025-00||All|
|Type D Plug-in||157-0049-00||All|