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The Tektronix 133 is an external enclosure and power supply for a letter-series or 1-series plug-in.  The enclosure supplies power to the plug-in and the outputs from the plug-in are available.  The bandwidth of the 133's outputs is 100Khz, which is much slower than the 16MHz bandwidth of the 132.  However, the 133 has a 2-ohm output impedance compared to 5k-ohms for the 132.  And the 133 can drive 1.5 amperes at its output, versus a maximum of 10mA for the 132.
{{Instrument Sidebar
|manufacturer=Tektronix
|model=133
|class=Power supply
|series=500-series scopes
|summary=Module power supply
|image=133front.jpg
|caption=Tek 133 front view
|introduced=1961
|discontinued=(?)
|designers=
|manuals=
* [[Media:070-290.pdf|Tektronix 133 Manual]] (PDF)
* [https://w140.com/tek_133_1968_catalog.pdf Tektronix 133 in 1968 Catalog] (PDF)
}}
The '''Tektronix 133''' is an external enclosure and power supply for a [[letter-series_and_1-series_plug-ins|letter-series or 1-series plug-in]].  It was [[introduced in 1961]].
The enclosure supplies power to the plug-in and the outputs from the plug-in are available.   
The bandwidth of the 133's outputs is 100 kHz, which is much slower than the 16 MHz bandwidth of the [[132]].   
However, the 133 has a 2 Ω output impedance compared to 5 kΩ for the [[132]], and the 133 can drive 1.5 amperes at its output, versus a maximum of 10 mA for the [[132]].
 
The signal path in the 133 starts with a differential pair of [[2N398A]] PNP transistors (Q414 and Q424) amplifying the signal from the plug-in interface.
The differential output of this first stage is used as two single-ended signals.
One phase of the differential amplifier's output is sent to the MONITOR output connector.
The other phase of the differential amplifier's output is sent to the high-current output amplifier.
NORM/INV switch selects which output gets the inverting phase, and which gets the non-inverting phase.
 
The high-current output amplifier starts with a [[2N1225]] PNP (Q444) which functions as a feedback amplifier.
The collector of Q444 drives the top and bottom halves of the push-pull output stage.
The top side of the output stage is a Sziklai pair formed by a [[TI483]] NPN (Q454) driving a [[2N1905]] PNP (Q474).
The bottom side of the output stage is a TI483 NPN (Q463) driving a 2N1905 PNP (Q483).
The output has a two ohm resistor and two ferrite beads in series.
 
==Pictures==
<gallery>
133front.jpg|front view
133tq.jpg|front inside
133right.jpg|right view
133top.jpg|top view
133left.jpg|left view shows power supply and TO-3 output power transistors
133bottom.jpg|bottom view shows solid state rectifiers and capacitors for low-voltage high-current output amplifier
Tek 133 rear.jpg
Tek 1a7 in 133 1.jpg|133 housing a [[1A7]]
Tek 1a7 in 133 2.jpg|133 housing a [[1A7]]
Tek 1a7 in 133 3.jpg|133 housing a [[1A7]]
Tek 133 ps schem.png|Power supply schematic
Tek 133 plug-in connector and sync.png|Plug-in connector and sync schematic
Tek 133 amplifier.png|Amplifier schematic
</gallery>
[[Category:Plugin power supplies]]
[[Category:Specifications needed]]

Latest revision as of 08:27, 20 August 2021

Tektronix 133
Module power supply
Tek 133 front view

Produced from 1961 to (?)

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 133 is an external enclosure and power supply for a letter-series or 1-series plug-in. It was introduced in 1961. The enclosure supplies power to the plug-in and the outputs from the plug-in are available. The bandwidth of the 133's outputs is 100 kHz, which is much slower than the 16 MHz bandwidth of the 132. However, the 133 has a 2 Ω output impedance compared to 5 kΩ for the 132, and the 133 can drive 1.5 amperes at its output, versus a maximum of 10 mA for the 132.

The signal path in the 133 starts with a differential pair of 2N398A PNP transistors (Q414 and Q424) amplifying the signal from the plug-in interface. The differential output of this first stage is used as two single-ended signals. One phase of the differential amplifier's output is sent to the MONITOR output connector. The other phase of the differential amplifier's output is sent to the high-current output amplifier. NORM/INV switch selects which output gets the inverting phase, and which gets the non-inverting phase.

The high-current output amplifier starts with a 2N1225 PNP (Q444) which functions as a feedback amplifier. The collector of Q444 drives the top and bottom halves of the push-pull output stage. The top side of the output stage is a Sziklai pair formed by a TI483 NPN (Q454) driving a 2N1905 PNP (Q474). The bottom side of the output stage is a TI483 NPN (Q463) driving a 2N1905 PNP (Q483). The output has a two ohm resistor and two ferrite beads in series.

Pictures

  • front view

    front view

  • front inside

    front inside

  • right view

    right view

  • top view

    top view

  • left view shows power supply and TO-3 output power transistors

    left view shows power supply and TO-3 output power transistors

  • bottom view shows solid state rectifiers and capacitors for low-voltage high-current output amplifier

    bottom view shows solid state rectifiers and capacitors for low-voltage high-current output amplifier

  • 133 housing a 1A7

    133 housing a 1A7

  • 133 housing a 1A7

    133 housing a 1A7

  • 133 housing a 1A7

    133 housing a 1A7

  • Power supply schematic

    Power supply schematic

  • Plug-in connector and sync schematic

    Plug-in connector and sync schematic

  • Amplifier schematic

    Amplifier schematic

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