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The 6AU6 (European: EF94) (Russian: 6Ж4П) (P/N 154-0022-00, 157-0073-00, 157-0059-00, 154-0284-00) is an RF pentode tube for up to ~50 MHz with a miniature B7G 7-pin base, introduced in 1946.
The 12AU6 is the equivalent version with a 12 V heater.
The 6AU6 is used in the 513, 581, 585 and others as an error amplifier, in the Type 53/54C plugin, and others.
The 6AU6A is an improved version for equipment with series-connected heaters that ha controlled warm-up and heater-to-cathode voltage rating increased to 200 V. The 6AU6WA is a ruggedized version.
The 8425 (used in Type Q) is an improved successor version.
Tek part number:
- 157-0073-00 (selected pair)
- 157-0059-00 (6AU6A)
- 154-0284-00 (6AU6WA)
|Aged/Checked/Matched Pair Details|
|Used in||Tek Part#||S/N Range|
|310||157-0034-00||See Note 1|
|502 (V414,V444)||157-0056-00||Before Mod M6179|
|Type CA Plug-in||157-0059-00||All|
|502, 505 (V414, V444)||157-0073-00||?|
Note 1: Replaced by raw 6AU6 with instrument mod
- Tung Sol 6AU6 Datasheet (PDF)
- 6AU6 / 6AU6A / 6AU6WA / 8425 @ radiomuseum.org