The 12BY7 is a miniature 6.5 W power pentode. The 12BY7A (European equivalent EL180) is a compatible and slightly improved version.
Both are all-glass types with a B9A (Noval) miniature 9-pin base and share the EIA 9BF pinout with a number of other miniature pentode tubes of the era.
Tek part number: 154-0047-00 (12BY7A)
|Aged/Checked/Matched Pair Details|
|Used in||Tek Part#||S/N Range|
|531, 533, 535, 536, 541, 543, 545, 555||157-0053-00||?|
Note1:Made obsolete soon after the number was allocated.
Tube aging procedure :Tube Aging
Selection/checking procedure :157- Checked and Tested Tubes: Specs and Procedure
Data sheets and Links
- General Electric 12BY7A Datasheet (PDF)
- 12BY7 / 12BY7A @ radiomuseum.org