View source for 661 Vertical Test Load Unit

The 661 Vertical Test Load Unit is a plug-in for testing 
the power supplies and interconnections in a Tektronix [[661]] sampling scope.
It serves a similar purpose to the [[TU-4]] (for the 560-series) and [[1M1]] (for the 500-series).
It contains load resistors for testing the mainframe's power supply.
It also contains a switch for testing the wiring between the plug-in interface
and the multi-pin digital output connector on the rear of the 661 mainframe.
There is a banana connector on the front of the plug-in that is wired to the
+300 V pin on the interface connector via a fuse. 


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Tek 661 vertical test load unit 1.jpg
Tek 661 vertical test load unit 2.jpg
Tek 661 vertical test load unit 3.jpg
Tek 661 vertical test load unit 4.jpg
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[[Category:Calibration fixtures]]