12BY7: Difference between revisions

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|Part_nos=
|Part_nos=
|Description=miniature 6.5 W power pentode
|Description=miniature 6.5 W power pentode
|Used_in=106;163;3B5;524;531;533;535;536;541;543;535;545;545A;549;555;3A75;
|Used_in=106;163;524;531;533;535;536;541;543;535;545;545A;549;555;75;3A75;3B5;
|Designers=
|Designers=
}}.  The '''12BY7A''' (154-0047-00), (European equivalent: '''EL180''') is a compatible and slightly improved version.   
}}.  The '''12BY7A''' (154-0047-00), (European equivalent: '''EL180''') is a compatible and slightly improved version.   
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</gallery>
</gallery>


[[Category:Vacuum tubes]]
[[Category:Pentodes]]
[[Category:Pentodes]]

Revision as of 06:33, 19 September 2023

The 12BY7 is a miniature 6.5 W power pentode vacuum tube. The 12BY7A (154-0047-00), (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.

Aged/Checked/Matched Pair Details
Used in Tek Part# S/N Range
531, 533, 535, 536, 541, 543, 545, 555 157-0053-00 ?
106 157-0115-00 Note 1

Note 1: Made obsolete soon after the number was allocated.

Reference:

Tube aging procedure / Selection and checking procedure

Data sheets and Links

9BF socket diagram
9BF socket diagram

Used in

  • the output stage of the 1121
  • the first stage of the 535, 545A, and 555

Pictures