12B4: Difference between revisions

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{{Vacuum Tube
{{Vacuum Tube
|Type=Triode
|Type=Triode
|Number=12B4
|Number=12B4(A)
|EuroNumber=
|EuroNumber=
|RussianNumber=
|RussianNumber=
|Part_nos=
|Part_nos=154-0044-00
|Description=power triode
|Description=power triode
|Used_in=126;310;310A;316;317;502;502A;526;541;541A;535;535A;545;545A;546;547;549;551;555;513;581;581A;585;585A;
|Used_in=126;310;310A;316;317;502;502A;526;541;541A;535;535A;545;545A;546;547;549;551;555;513;581;581A;585;585A;
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The 12B4 is used in the [[126]], [[551]], and [[555]], and as a pass tube in the power supply of the [[513]], [[581]] and [[585]].
The 12B4 is used in the [[126]], [[551]], and [[555]], and as a pass tube in the power supply of the [[513]], [[581]] and [[585]].
The 12B4A (154-0044-00) is similar except for the controlled heater warm-up, suitable for use in conjunction with other 600 mA types.


==Data==
==Data==
* [https://w140.com/12B4A.pdf 12B4A Datasheet]
* [https://w140.com/12B4A.pdf 12B4A Datasheet]
* [[tube:12b4|12B4]] @ radiomuseum.org
* [[tube:12b4|12B4]] / [[tube:12b4a|12B4A]] @ radiomuseum.org


==Pictures ==
==Pictures ==

Revision as of 11:40, 12 July 2022

parallel 12B4s (center left) as pass elements in 585 power supply

The 12B4(A)  (P/N 154-0044-00) is a power triode vacuum tube with a B9A (Noval) miniature 9-pin base. It has 5.5 W maximum plate dissipation, 1000 V peak plate voltage, and and 105 mA peak cathode current.

The 12B4 is used in the 126, 551, and 555, and as a pass tube in the power supply of the 513, 581 and 585.

The 12B4A (154-0044-00) is similar except for the controlled heater warm-up, suitable for use in conjunction with other 600 mA types.

Data

Pictures