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The Tektronix TU-4 is a plug-in for testing [[560-series scopes|560-series oscilloscope mainframes]]. | The '''Tektronix TU-4''' is a plug-in for testing [[560-series scopes|560-series oscilloscope mainframes]]. | ||
It contains load resistors for testing the power supplies of the scope. | It contains load resistors for testing the power supplies of the scope. | ||
It has an Y-input for driving the vertical deflection, | It has an Y-input for driving the vertical deflection, | ||
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<gallery> | <gallery> | ||
Tek tu4 front.jpg | |||
Tek tu4 left.jpg | |||
</gallery> | </gallery> | ||