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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]]. | ||
The 291 uses the TF-1 test fixture. | |||
TF-1 fixtures have been known to have issues with bad connections with the diode. | |||
In at least one case, a TF-1 has been made to work reliably by replacing the weak | |||
AlNiCo magnet that holds the axial leaded (magnetic) diode in place, by | |||
replacing it with a much stronger FeNdB magnet the same size | |||
(easily available on Ebay). | |||
* [http://w140.com/tek_291.pdf Tektronix 291 Manual (PDF)] | * [http://w140.com/tek_291.pdf Tektronix 291 Manual (PDF)] | ||