S
The Tektronix Type S is a 500-series plug-in for measuring semiconductor diode recovery characteristics.
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
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Some Parts Used in the S
| Part | Part Number(s) | Class | Description | Used in |
|---|---|---|---|---|
| 12AT7 | 154-0039-00 | Vacuum Tube (Dual Triode) | dual high-gain triode | 161 • 180 • 310 • 310A • 315 • 316 • 360 • 502 • 502A • 511A • 512 • 513 • 513D • 514 • 514AD • 514D • 516 • 524 • 529 • RM529 • 544 • 546 • 547 • 556 • 565 • 570 • 3A2 • 75 • 3A75 • 1M1 • A • B • C • G • H • K • L • M • N • K • R • S • Z |
| 12AU6 | 154-0040-00 | Vacuum Tube (Pentode) | RF pentode | 81 • 112 • 1L10 • 1L20 • 1L60 • 512 • 556 • 575 • 545 • 547 • 549 • 581 • 585 • A • B • C • G • K • H • L • M • N • O • R • S • Z |
| 6AK5 | 154-0014-00 • 154-0206-00 • 154-0084-00 | Vacuum Tube (Pentode) | RF pentode | B • C • CA • G • K • L • S • Z • 517 • 517A • 524 |
| 6GM8 | 154-259 • 154-0259-00 | Vacuum Tube (Dual Triode) | dual triode | 81 • 516 • S |