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The Tektronix 291 Diode Switching Time Tester Power Supply was [[introduced in 1963]]. | The Tektronix 291 Diode Switching Time Tester Power Supply was [[introduced in 1963]]. | ||
* [http://bama.edebris.com/download/tek/291/Tek%20291.pdf Tektronix 291 Manual (PDF)] | * [http://bama.edebris.com/download/tek/291/Tek%20291.pdf Tektronix 291 Manual (PDF)] |