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The Tektronix Type 290 Transistor Switching Time Tester is a test fixture
The Tektronix Type 290 Transistor Switching Time Tester is a test fixture
[[introduced in 1963]] with built-in power supplies for the collector current and the base bias.
[[introduced in 1962]] with built-in power supplies for the collector current and the base bias.
It handles NPN and PNP transistors.  It has two modes: low-voltage and high-voltage.
It handles NPN and PNP transistors.  It has two modes: low-voltage and high-voltage.
In the low-voltage mode, Vcc can be adjusted from 0V to 30V.  In the high-voltage
In the low-voltage mode, Vcc can be adjusted from 0V to 30V.  In the high-voltage

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