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The Tektronix Type 127 is a power supply, calibrator, and unity-gain preamplifier for | The Tektronix Type 127 "Preamplifier Power Supply", [[introduced in 1958]], | ||
is a power supply, calibrator, and unity-gain preamplifier for two | |||
[[letter-series and 1-series plug-ins|letter-series or 1-series plug-ins]]. | |||
The 127 targets applications where one wants to use Tektronix plug-ins | It is a rack-mount unit with a power supply that resembles the power supply | ||
as front-end amplifiers for other instrumentation. | of an early [[500-series scopes|500-series oscilloscope]]: a 50/60 Hz transformer, | ||
Since [[letter-series and 1-series plug-ins]] have relatively high output impedance, | [[selenium rectifiers]], a single voltage reference tube controlling all output | ||
their outputs | voltages, and [[6080]] pass tubes for the regulated outputs. | ||
(i.e., differentially between pins 1 and 3 of the plug-in-to-scope interconnecting plug) | |||
are not suitable for directly driving long cables. | The 127 targets applications where one wants to use Tektronix plug-ins as front-end amplifiers | ||
The 127 provides | for other instrumentation. Since [[letter-series and 1-series plug-ins]] have relatively high | ||
drive long cables and other low impedance loads. | output impedance, their outputs (i.e., differentially between pins 1 and 3 of the | ||
Each of the two amplifiers in the 127 is fully differential and | plug-in-to-scope interconnecting plug) are not suitable for directly driving long cables. | ||
outputs are on the front and rear panels. | |||
The 127 has unity gain if the output is taken differentially and | The 127 provides 20 MHz unity gain amplifiers that can drive long cables and other low impedance loads. | ||
the load on each output is | Each of the two amplifiers in the 127 is fully differential and outputs are on the front and rear panels. | ||
The 127 has unity gain if the output is taken differentially and the load on each output is 170 Ω. | |||
The 127 is a 5U (8.75"/22.2cm) rackmount unit and weighs 37 pounds (16.9kg). | The 127 is a 5U (8.75"/22.2cm) rackmount unit and weighs 37 pounds (16.9kg). | ||
Maximum power consumption is | Maximum power consumption is 450 W. | ||
<gallery> | <gallery> | ||
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* [http://w140.com/tek_fcp/tek_type_127_factory_cal_proc.pdf Tektronix 127 Factory Calibration Procedure (PDF)] | * [http://w140.com/tek_fcp/tek_type_127_factory_cal_proc.pdf Tektronix 127 Factory Calibration Procedure (PDF)] | ||
* [http://w140.com/tek_127_1968_catalog.pdf Tektronix 127 in 1968 Catalog (PDF)] | * [http://w140.com/tek_127_1968_catalog.pdf Tektronix 127 in 1968 Catalog (PDF)] | ||
[[Category:500 series scopes]] | |||