S

The Tektronix Type S is a 500-series plug-in for measuring semiconductor diode recovery characteristics.

Manuals – Specifications – Links – Pictures

It can be thought of as having two parts, a stimulus subsystem and a measurement subsystem. The stimulus comes from mercury switch that drives a 6GM8/ECC86 tube that operates in a current-steering mode. The measurement subsystem is a wideband amplifier that converts the single-ended voltage on the diode under test to the differential signal that the oscilloscope mainframe takes. One terminal of the diode is grounded.

Measurements with the Type S are typically made by applying a current step to the diode while observing the voltage across the diode.

The Type S was introduced in 1960 and produced through 1966.

Key Specifications

Current ranges	Forward – 1, 2, 5, 10, and 20 mA; Reverse – 0, 0.1, 0.2, 0.5, 1.0, and 2.0 mA
Vertical Deflection	50 or 500 mV/div
Shunt Capacitance	~16 pF at 50 mV/div, ~9 pF at 500 mV/div
Rise time	1 ns

Pictures

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  Front

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  Chassis

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  Chassis bottom

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  Mercury switch