133: Difference between revisions

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|manuals=
|manuals=
* [[Media:070-290.pdf|Tektronix 133 Manual]] (PDF)
* [[Media:070-290.pdf|Tektronix 133 Manual]] (PDF)
* [https://w140.com/tek_133_1968_catalog.pdf Tektronix 133 in 1968 Catalog (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 '''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]].

Latest revision as of 09:27, 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