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
Front
Chassis
Chassis bottom
Mercury switch
Some Parts Used in the S
| Page | Class | Description | Used in |
|---|---|---|---|
| 12AT7 | Vacuum Tube (Dual Triode) | dual high-gain triode | 161 • 180 • 310 • 310A • 315 • 316 • 360 • 502 • 502A • 512 • 513 • 513D • 514 • 514AD • 514D • 516 • 524AD • 529 • RM529 • 544 • 546 • 547 • 556 • 3A2 • 3A75 • 1M1 • A • B • C • G • H • K • L • M • N • K • R • S • Z |
| 12AU6 | Vacuum Tube (Pentode) | RF pentode | 81 • 112 • 512 • 556 • 575 • 545 • 549 • 581 • 585 • A • B • C • G • K • H • L • M • N • O • R • S • Z |
| 6AK5 | Vacuum Tube (Pentode) | RF pentode | B • C • CA • G • K • L • S • Z • 517 • 517A |
| 6GM8 | Vacuum Tube (Dual Triode) | dual triode | 81 • 516 • S |