7189A: Difference between revisions

From TekWiki
Jump to navigation Jump to search
No edit summary
No edit summary
 
Line 19: Line 19:
==Used in==
==Used in==
* Four 7189As are used in the output stage of the [[106]].
* Four 7189As are used in the output stage of the [[106]].
{{Part usage}}


==Data==
==Data==

Latest revision as of 05:42, 17 September 2024

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/EL84 and 7189/E84L vacuum tubes. It can handle 400 volts on the screen and 440 volts on the plate. Its maximum screen dissipation is 2.2 W, and the 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). To use a 7189 in place of a 7189A in the Tektronix 106, the socket needs to be rewired.

GE was the only US maker of the 7189A.

Used in

  • Four 7189As are used in the output stage of the 106.

Some instruments using part 7189A

Instrument Manufacturer Class Model Description Introduced
106 Tektronix Pulse generator 106 Pulse generator 1966

Data

Photos