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The Tektronix Type 127 is a power supply and preamplifier for  
{{Instrument Sidebar
two [[letter-series and 1-series plug-ins|letter-series or 1-series plug-ins]]
|manufacturer=Tektronix
The Type 127 was [[introduced in 1958]].
|model=127
It is a rack-mount unit with a power supply that resembles the power supply of an early
|class=Power supply
[[500-series scopes|500-series oscilloscope]]: a 50/60Hz transformer, [[selenium rectifiers]],
|series=500-series scopes
a single voltage reference tube controlling
|summary=Preamplifier Power Supply
all output voltages, and [[6080]] pass tubes for the regulated outputs.  The 127 contains a
|image=127_front.JPG
fully differential DC-coupled 15MHz amplifier for each channel with cathode follower outputs
|caption=Tek 127 front view
on the front and rear panels.   
|introduced=1958
|discontinued=1972
|designers=
|manuals=
* [[Media:070-284.pdf|Tektronix 127 Manual]] (PDF)
* [https://w140.com/tek_fcp/tek_type_127_factory_cal_proc.pdf Tektronix 127 Factory Calibration Procedure (PDF)]
* [https://w140.com/tek_127_1968_catalog.pdf Tektronix 127 in 1968 Catalog (PDF)]
}}
The '''Tektronix Type 127''' "Preamplifier Power Supply", [[introduced in 1958]] and made until 1971, 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]].   


It is a rack-mount unit with a power supply that resembles the power supply of an early [[500-series scopes|500-series oscilloscope]]:
a 50/60 Hz transformer, [[selenium rectifiers]], a single voltage reference tube controlling all output voltages, and [[6080]] pass tubes for the regulated outputs. 
The 127 targets applications where one wants to use Tektronix plug-ins as front-end amplifiers for other instrumentation. 
Since [[letter-series and 1-series plug-ins]] have relatively high output impedance, their 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 provides 20 MHz unity gain amplifiers that can drive long cables and other low impedance loads.
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). Maximum power consumption is 450 W.


<gallery>
<gallery>
Image:127_front.JPG|front view
127_front.JPG|front view
Image:127_open.JPG|open
127_open.JPG|open, selenium rectifier
Tek 127 empty.jpg
Tek 127 rear.jpg
Tek 127 de1.jpg
Tek 127 de2.jpg
Tek 127 de3.jpg
Tek 127 de4.jpg
Tek 127 de5.jpg
Tek 127 de6.jpg
Tek 127 de7.jpg
Tek 127 de8.jpg
Tek 127 de9.jpg
</gallery>
</gallery>


* [http://bama.edebris.com/download/tek/127/Tek%20127.pdf Tektronix 127 Manual (PDF)]
 
* [http://w140.com/tek_fcp/tek_type_127_factory_cal_proc.pdf Tektronix 127 Factory Calibration Procedure (PDF)]
 
[[Category:Plugin power supplies]]

Latest revision as of 06:23, 18 August 2021

Tektronix 127
Preamplifier Power Supply
Tek 127 front view

Produced from 1958 to 1972

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix Type 127 "Preamplifier Power Supply", introduced in 1958 and made until 1971, is a power supply, calibrator, and unity-gain preamplifier for two letter-series or 1-series plug-ins.

It is a rack-mount unit with a power supply that resembles the power supply of an early 500-series oscilloscope: a 50/60 Hz transformer, selenium rectifiers, a single voltage reference tube controlling all output voltages, and 6080 pass tubes for the regulated outputs.

The 127 targets applications where one wants to use Tektronix plug-ins as front-end amplifiers for other instrumentation. Since letter-series and 1-series plug-ins have relatively high output impedance, their 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 provides 20 MHz unity gain amplifiers that can drive long cables and other low impedance loads. 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). Maximum power consumption is 450 W.