133: Difference between revisions

Latest revision as of 09:27, 20 August 2021

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.

Tektronix 133
Module power supply Tek 133 front view Produced from 1961 to (?) Manuals Tektronix 133 Manual (PDF) Tektronix 133 in 1968 Catalog (PDF) (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

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 inside
right view
top view
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
133 housing a 1A7
133 housing a 1A7
133 housing a 1A7
Power supply schematic
Plug-in connector and sync schematic
Amplifier schematic

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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 schematics are here:
+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.
-* http://w140.com/kurt/tek_133_schematics.pdf
+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>
-Image:133front.jpg|front view
+front.jpg|front view
-Image:133tq.jpg|front inside
+tq.jpg|front inside
-Image:133right.jpg|right view
+right.jpg|right view
-Image:133top.jpg|top view
+top.jpg|top view
-Image:133left.jpg|left view shows power supply and TO-3 output power transistors
+left.jpg|left view shows power supply and TO-3 output power transistors
-Image:133bottom.jpg|bottom view shows solid state rectifiers and capacitors for low-voltage high-current output amplifier
+bottom.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]]