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The Tektronix Type R is a plug-in for [[500-series scopes]]. It is designed to measure risetime of a NPN and PNP transistors, | {{Plugin Sidebar 2 | | ||
but it works well with FETs as well. | title=Tektronix Type R| | ||
summary=Tranistor rise-time test set | | |||
series=[[500-series scopes]] | | |||
image=Tek type r front.jpg | | |||
caption=Type R | | |||
introduced=1958 | | |||
discontinued=1966 | | |||
manuals= | |||
* [http://bama.edebris.com/manuals/tek/r/ Tektronix Type R Manual (BAMA)] | |||
* [http://w140.com/tek_fcp/tek_type_r_factory_cal_proc.pdf Tektronix Type R Factory Calibration Procedure (PDF)] | |||
}} | |||
The '''Tektronix Type R''' is a plug-in for [[500-series scopes]]. It is designed to measure risetime of a NPN and PNP transistors, | |||
but it works well with FETs as well. | |||
Type R can operate in grounded-emitter or grounded-base configurations. | |||
In the grounded-emitter configuration, it provides a variable collector voltage through a collector resistor | In the grounded-emitter configuration, it provides a variable collector voltage through a collector resistor | ||
which is used to sense the collector current. It provides a base bias voltage and a base pulse signal, | which is used to sense the collector current. It provides a base bias voltage and a base pulse signal, | ||
fed to the base of the transistor through a resistor. The base pulse is generated by a [[mercury switch]] | fed to the base of the transistor through a resistor. The base pulse is generated by a [[mercury switch]] | ||
and its rise time is specified to be less than 5 nanoseconds. | and its rise time is specified to be less than 5 nanoseconds. | ||
Base and collector bias conditions can be set independently. The collector signal is AC-coupled to | Base and collector bias conditions can be set independently. | ||
The collector signal is AC-coupled to | |||
an amplifier whose output is fed to the oscilloscope. The Type R has its own on-board low-voltage, | an amplifier whose output is fed to the oscilloscope. The Type R has its own on-board low-voltage, | ||
high-current regulated power supplies which feature germanium power transistors. | high-current regulated power supplies which feature germanium power transistors. | ||
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and the Type [[H]] plug-in. It is the first plug-in with transistors. It was dropped after 1966 or 1967. | and the Type [[H]] plug-in. It is the first plug-in with transistors. It was dropped after 1966 or 1967. | ||
==Pictures== | |||
<gallery> | <gallery> | ||
Image:Type_r_with_adapters.jpg | Image:Type_r_with_adapters.jpg | ||