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Tektronix Type T
Timebase plugin
Tektronix Type T timebase

Compatible with 500-series scopes

Produced from 1957 to 1973


Manuals – Specifications – Links – Pictures

The Tektronix Type T is a timebase plug-in primarily intended for use in the model 536 X-Y scope. It contains trigger and sweep circuitry. The typical use of a Type T plug-in is as the X-axis plug-in in a 536, to make the 536 behave like a normal oscilloscope instead of an X-Y scope. However, there is no capability for internal triggering – a jumper must be connected from the Vertical Signal Out on the 536 to the External Trig on the Type T.

Plugging a Type T into a vertical slot of a normal 500-series scope produces a raster, and using the scope's Z-axis input this allows a crude video display.

The banana jack on the back of the plugin is to provide retrace blanking when used in the horizontal slot of a 536.

The Type T was introduced in 1957 and dropped after 1972, the same as its primary host, the 536. (Types K, L, and T are tied for longest production life, at 16 years, B, D, and G are next at 15 years.)

Key Specifications

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Some Parts Used in the T

Page Class Description Used in
6AL5 Vacuum Tube (Dual Diode) high-perveance dual diode 163 181 190 310 310A 315 316 317 502 502A 503 511 511A 512 516 526 535 535A 545 545A 549 581 581A 585 585A 551 T Telequipment S52
6AU8 Vacuum Tube (Triode/Pentode) triode-pentode combo T
6BQ7A Vacuum Tube (Dual Triode) dual triode 107 163 310 316 360 181 315 524 531 532 535 536 541 545 T
6U8 Vacuum Tube (Triode/Pentode) triode-pentode combo 130 160 163 310 315 316 535 545 T