7189A: Difference between revisions
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|Type=Pentode | |Type=Pentode | ||
|Number=7189A | |Number=7189A | ||
|EuroNumber=E84L | |||
|RussianNumber= | |||
|Part_nos= | |||
|Description=power pentode | |Description=power pentode | ||
|Used_in=106; | |Used_in=106; | ||
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It is the higher voltage and power version of the [[6BQ5]] aka EL84 tube. | It is the higher voltage and power version of the [[6BQ5]] aka EL84 tube. | ||
Note that the pinout of the 7189A is different from the [[7189]]. | Note that the pinout of the 7189A is different from the [[7189]] - the screen grid is additionally connected with pin 6, the control grid additionally with pin 1 (for better heat dissipation). | ||
It may therefore be necessary to rewire the socket to use a 7189. | |||
GE was the only US maker of the 7189A. | GE was the only US maker of the 7189A. | ||
==Used in== | ==Used in== | ||
* | * Output stage of the [[106]] | ||
==Data== | ==Data== | ||
* [ | * [[tube:7189a|7189A @ radiomuseum.org]] / [https://www.radiomuseum.org/forum/7189a_7189a2.html Forum comment] | ||
{{MissingPics}} | |||
[[Category:Pentodes]] | [[Category:Pentodes]] | ||
Revision as of 09:02, 10 November 2021
The 7189A (European: E84L) is a power pentode vacuum tube with a B9A (Noval) miniature 9-pin base that can handle 440 V plate voltage.
It is the higher voltage and power version of the 6BQ5 aka EL84 tube.
Note that the pinout of the 7189A is different from the 7189 - the screen grid is additionally connected with pin 6, the control grid additionally with pin 1 (for better heat dissipation). It may therefore be necessary to rewire the socket to use a 7189.
GE was the only US maker of the 7189A.
Used in
- Output stage of the 106
Data
Pictures
- please add