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The '''Tektronix Type 290 Transistor Switching Time Tester''' is a test fixture
{{Instrument Sidebar
[[introduced in 1962]] with built-in power supplies for the collector current and the base bias.
|manufacturer=Tektronix
|model=290
|class=Test fixture
|series=
|summary=Transistor Switching Time Tester
|image=Tek 290 front.jpg
|caption=Tek 290 front
|introduced=1962
|discontinued=(?)
|designers=
|manuals=
* [http://w140.com/tek_290.pdf Tektronix 290 Manual (PDF)]
}}
The '''Tektronix Type 290 Transistor Switching Time Tester''' is a test fixture [[introduced in 1962]] with built-in power supplies for the collector current and the base bias.
It handles NPN and PNP transistors.   
It handles NPN and PNP transistors.   


The 290 has two modes, low-voltage (collector voltage 0 to 30 V) and high-voltage
The 290 has two modes, low-voltage (collector voltage 0 to 30 V) and high-voltage (collector voltage from 0 to 100 V).  
(collector voltage from 0 to 100 V). The fixture's input and output are 50 Ω
The fixture's input and output are 50 Ω GR-874 connectors, so it can be used with standard cables and test instruments while maintaining good signal integrity.   
GR-874 connectors, so it can be used with standard cables and test
The instrument itself is rated to have a risetime of under 1 ns.  
instruments while maintaining good signal integrity.  The instrument itself is rated
to have a risetime of under 1 ns.  


* [http://w140.com/tek_290.pdf Tektronix 290 Manual (PDF)]
==Pictures==
<gallery>
<gallery>
Tek 290 front.jpg
Tek 290 front.jpg

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