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Tektronix Type S
Diode recovery tester plug-in
Type S front view

Compatible with 500-series scopes

Produced from 1960 to 1967


Manuals – Specifications – Links – Pictures

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


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Some Parts used in the S

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