7189A: Difference between revisions
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m (Added this entry for the 7189A, which had been missing.) |
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|EuroNumber= | |EuroNumber= | ||
|RussianNumber= | |RussianNumber= | ||
|Part_nos= | |Part_nos=154-0503-00 | ||
|Description=power pentode | |Description=power pentode | ||
|Used_in=106; | |Used_in=106; | ||
|Designers= | |Designers= | ||
}} with a {{B9A base}} | }} with a {{B9A base}}. | ||
The 7189A is the higher voltage and power version of the [[6BQ5]] aka EL84 tube and of the [[7189]]. It can handle 400 volts on the screen and 440 volts on the plate. It's maximum screen dissipation is 2.2 W, while maximum plate dissipation is 13.2 W. | |||
Note that the pinout of the 7189A is different from the [[7189]] - the screen grid is additionally connected | Note that the pinout of the 7189A is different from the [[7189]] - the screen grid is additionally connected to pin 6, and the control grid additionally to pin 1 (for better heat dissipation). | ||
You must rewire the socket to use a [[7189]] in place of a 7189A in the Tektronix [[106]]. | |||
GE was the only US maker of the 7189A. | GE was the only US maker of the 7189A. | ||
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==Data== | ==Data== | ||
* [[Media:7189A.pdf|7189A data sheet]] | * [[Media:7189A.pdf | 7189A GE data sheet]] | ||
* [[tube:7189a|7189A @ radiomuseum.org]] / [https://www.radiomuseum.org/forum/7189a_7189a2.html | * [[tube:7189a|7189A @ radiomuseum.org]] / [https://www.radiomuseum.org/forum/7189a_7189a2.html] | ||
{{MissingPics}} | {{MissingPics}} | ||
[[Category:Pentodes]] | [[Category:Pentodes]] | ||
Revision as of 10:50, 10 November 2021
The 7189A (P/N 154-0503-00) is a power pentode vacuum tube with a B9A (Noval) miniature 9-pin base.
The 7189A is the higher voltage and power version of the 6BQ5 aka EL84 tube and of the 7189. It can handle 400 volts on the screen and 440 volts on the plate. It's maximum screen dissipation is 2.2 W, while maximum plate dissipation is 13.2 W.
Note that the pinout of the 7189A is different from the 7189 - the screen grid is additionally connected to pin 6, and the control grid additionally to pin 1 (for better heat dissipation). You must rewire the socket to use a 7189 in place of a 7189A in the Tektronix 106.
GE was the only US maker of the 7189A.
Used in
- Output stage of the 106
Data
Pictures
- please add