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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 1M1 310 310A 315 316 317 502 502A 503 511 511A 512 516 517 517A 524 526 535 535A 545 545A 549 581 581A 585 585A 551 C 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 130 160 163 310 315 316 524 535 545 T