123: Difference between revisions

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{{Instrument Sidebar
|manufacturer=Tektronix
|model=123
|class=Amplifier
|series=
|summary=miniature preamplifier
|image=Tek 123 front.jpg
|caption=Tek 123 front
|introduced=1955
|discontinued=(?)
|designers=
|manuals=
* ''please add [[Category:Manual needed]]
}}
The '''Tektronix 123''' is a miniature preamplifier [[introduced in 1955]].   
The '''Tektronix 123''' is a miniature preamplifier [[introduced in 1955]].   
The gain is 100, input impedance is 10 MΩ, and output impedance is
31 kΩ. Frequency response is from 3 Hz to 25 kHz.


The 123 uses two [[CK512AX]] pentodes for amplification and is powered by
The gain is 100, input impedance is 10 MΩ, and output impedance is 31 kΩ. Frequency response is from 3 Hz to 25 kHz.
batteries.  


Although the 123 is an AC amplifier, the output is taken directly from
The 123 uses two [[CK512AX]] pentodes for amplification and is powered by batteries.  
the plate of one of the tubes, without an output coupling (DC block)
capacitor.  So the output signal rides on about 15 volts of DC.


The intended use of the 123 is as a preamplifier for other
Although the 123 is an AC amplifier, the output is taken directly from the plate of one of the tubes, without an output coupling (DC block) capacitor.  So the output signal rides on about 15 volts of DC.
instrumentation such as an oscilloscope, and the oscilloscope's
input coupling can simply be set to "AC".


[[List of manuals that are needed|Manual needed]].
The intended use of the 123 is as a preamplifier for other instrumentation such as an oscilloscope, and the oscilloscope's input coupling can simply be set to "AC".


<gallery>
==Pictures==<gallery>
Image:Tek 123 1958 cat.jpg|Description in 1958 Catalog
Tek 123 1958 cat.jpg|Description in 1958 Catalog
Image:Tek 123 front.png|Front panel
Tek 123 front.png|Front panel
Image:Tek 123 schematic.png|Schematic
Tek 123 schematic.png|Schematic
Image:Tek 123 partslist.png|Parts list
Tek 123 partslist.png|Parts list
Tek_123-2.jpg
Tek_123-2.jpg
Tek_123-3.jpg
Tek_123-3.jpg

Revision as of 04:45, 18 August 2021

Tektronix 123
miniature preamplifier
Tek 123 front

Produced from 1955 to (?)

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

The Tektronix 123 is a miniature preamplifier introduced in 1955.

The gain is 100, input impedance is 10 MΩ, and output impedance is 31 kΩ. Frequency response is from 3 Hz to 25 kHz.

The 123 uses two CK512AX pentodes for amplification and is powered by batteries.

Although the 123 is an AC amplifier, the output is taken directly from the plate of one of the tubes, without an output coupling (DC block) capacitor. So the output signal rides on about 15 volts of DC.

The intended use of the 123 is as a preamplifier for other instrumentation such as an oscilloscope, and the oscilloscope's input coupling can simply be set to "AC".

==Pictures==

  • Description in 1958 Catalog

    Description in 1958 Catalog

  • Front panel

    Front panel

  • Schematic

    Schematic

  • Parts list

    Parts list

  • External view

    External view

  • internal view

    internal view

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