12BY7: Difference between revisions

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The '''12BY7''' is a miniature 6.5 W power pentode.  The '''12BY7A''' (European equivalent '''EL180''') is a compatible and slightly improved version.   
{{Vacuum Tube
|Type=Pentode
|Number=12BY7
|EuroNumber=
|RussianNumber=
|Part_nos=
|Description=miniature 6.5 W power pentode
|Used_in=106;531;533;535;536;541;543;545;555;
|Designers=
}}.  The '''12BY7A''' (European equivalent '''EL180''') is a compatible and slightly improved version.   


Both are all-glass types with a {{B9A base}} and share the EIA 9BF pinout with a number of other miniature pentode tubes of the era.
Both are all-glass types with a {{B9A 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)
Tek part number: 154-0047-00 (12BY7A)
{| class="wikitable"
{| class="wikitable"
{{Checkedtubes TableHeader}}     
{{Checkedtubes TableHeader}}     
Line 9: Line 19:
|  [[531]], [[533]], [[535]], [[536]], [[541]], [[543]], [[545]], [[555]]  || 157-0053-00  || ?
|  [[531]], [[533]], [[535]], [[536]], [[541]], [[543]], [[545]], [[555]]  || 157-0053-00  || ?
|-  
|-  
|  [[106]]  || 157-0115-00  || Note1
|  [[106]]  || 157-0115-00  || Note 1
|}
|}
Note1:Made obsolete soon after the number was allocated.
Note 1: Made obsolete soon after the number was allocated.


{{Tube aging reference}}
{{Tube aging reference}}

Revision as of 12:03, 10 October 2021

The 12BY7 is a miniature 6.5 W power pentode vacuum tube. 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 ?
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