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The Type O is a [[letter-series and 1-series plug-ins|letter-series plug-in]] that contains two op-amps.
{{Plugin Sidebar
The input and feedback networks of the op-amps can be configured from the front panel using knobs
|manufacturer=Tektronix
and/or user-supplied components. There are sockets on the front panel for banana plugs.
|series=500-series scopes
Type O also has a regular signal input that does not involve the op-amps. 
|type=Type O
A mode switch selects which op-amp's output will be displayed, or the regular signal input.
|summary=Dual opamp plugin
|image=Tek Type O front.jpg
|caption=Type O front view
|introduced=1962
|discontinued=1974
|designers=Hiro Moriyasu
|manuals=
* [[Media:070-323.pdf|Tektronix Type O Manual]]
* [[Media:Tek type o preliminary.pdf|Tektronix Type O Preliminary Manual]]
* [[Media:Tek type o irb.pdf|Tektronix Type O Instrument Reference Book]] (OCR)


Regular signal bandwidth is 25MHz, maximum sensitivity is 50mV/div,
'''Applications'''
op-amp gain-bandwidth product is 15MHz, and open-loop DC gain is 2500.
* [[Media:tek_opamps_apps.pdf|Tektronix Opamps and Their Applications]] (bad-OCR)


Type O was [[introduced in 1962|introduced in mid-1962]] and it was
'''Calibration'''
"in at the finish", available right up to the discontinuance of the entire classic plug-in scope line in 1974.
* [[Media:tek_type_o_fcp.pdf|Tektronix Type O Factory Calibration Procedure]] (bad-OCR)
* [[Media:Tek type o fcp oct 1967.pdf|Tektronix Type O Factory Calibration Procedure Oct 1967]]
* [[Media:Tek type o cal outline.pdf|Tektronix Type O Calibration Outline]] (OCR)


The Type O can be used with any of the following adapters:
'''Alternate copies'''
[[013-081]], [[013-068]], [[013-0048-01]], [[013-0049-01]], [[013-0086-00]], [[013-0067-00]] (manual below).
* [https://bama.edebris.com/manuals/tek/o/ Tektronix Type O Manual] (DJVU @ BAMA)


* [http://bama.edebris.com/manuals/tek/o/ Tektronix Type O Manual (BAMA)]
'''Catalogs'''
* [http://w140.com/tek_fcp/tek_type_o_factory_cal_proc.pdf Tektronix Type O Factory Calibration Procedure (PDF)]
* [[Media:tektronix_type_o_1968_cat.pdf|Tektronix Type O in 1968 Catalog]]
* [http://w140.com/tek_type-o_1968_catalog.pdf Tektronix Type O in 1968 Catalog (PDF)]
* [[Media:A-2078-3.pdf|Type O Brochure (PDF)]]
* [http://w140.com/013-067_Log_adapter.pdf Tektronix 013-067 Log Adapter Manual (PDF)]
</small>
* [http://w140.com/tek_opamps_and_applications.pdf Tektronix Opamps and Their Applications (PDF)]
}}


The '''Tektronix Type O''' is a [[letter-series and 1-series plug-ins|letter-series plug-in]], designed by [[Hiro Moriyasu]], that contains two operational amplifiers and a vertical amplifier.
It was [[introduced in 1962|introduced in mid-1962]] and was available through 1973.
The input and feedback networks of the operational amplifiers can be configured from the front panel switches and/or by way of user-supplied components plugged into the front panel banana jacks.
Tektronix made several pre-configured plug-in modules to plug directly into those jacks.
See the ''Accessories'' section below.
Note that one of the accessories is an empty box with mating banana plugs for a user-designed circuit.
A mode switch selects the display to be taken from either op-amp's output, or the vertical amplifier input.
{{BeginSpecs}}
{{Spec | Bandwidth    | DC to 25 MHz (Vertical amplifier<sup>1</sup>) }}
{{Spec | Rise time    | 14 ns (Vertical amplifier <sup>1</sup>) }}
{{Spec | Deflection    | 50 mV/div to 10 V/div, 1–2–5, and variable (Vertical amplifier) }}
{{Spec | Input        | 1 MΩ // 47 pF (Vertical amplifier) }}
{{Spec | Op-Amp GBW    | 15 MHz }}
{{Spec | Op-Amp gain  | 2500 }}
{{Spec | Op-Amp output | ±50 V, ±5 mA; output impedance 30 Ω @ 1 MHz }}
{{Spec | Op-Amp noise  | typ. 0.5 mV<sub>p-p</sub> referred to the input }}
{{Spec | Internal Z    | input and feedback can be selected from 10 kΩ, 100 kΩ, 200 kΩ, 500 kΩ, 1 MΩ<br>or 10 pF to 1 μF in decade steps }}
{{EndSpecs}}
''Note 1: In 540- and 580-series scopes and 555''
<small>
===Accessories===
{{2ColBegin}}
* [[013-0049-01]] Standard Shielded Cover (two supplied with each plugin)
* [[013-0048-01]] Terminal Adapter Assembly (empty box for user chosen components)
* [[013-0081-00]] Compensating Adapter
* [[013-0068-00]] Gating Adapter
* [[013-0086-00]] Leakage Current Adapter
* [[013-0067-00]] Logarithmic Amplifier Adapter
* [[067-0507-00]] Grid Current Checker (calibration fixture)
{{2ColEnd}}
</small>
==Prices==
* $625 in 1971 ($4,700 in 2023 dollars)
==Internals==
The opamps are implemented using two [[12AU6]] as a differential pair followed by two systems of a [[6DJ8]] as a bootstrapped cathode follower.
The vertical amplifier also starts with a 12AU6 differential pair, which is followed by a pair of [[2N1143]] 200 MHz transistors.
==Pictures==
<gallery>
Tek Type O front.jpg      | Front view
Tek_Type_O_front_Peter.jpg | Front view
Type_o_top.jpg            | Top view
Type_o_right.jpg          | Right view
Type_o_left.jpg            | Left view
Type-o.jpg
Tek type o adp1.JPG
Tek type o adp2.JPG
Tek o fr1.jpg
Tek o fr2.jpg
Tek o fr3.jpg
Tek o fr4.jpg
Tek o fr5.jpg
Tek o fr6.jpg
Preproduction type O.jpg|pre-production Type O
</gallery>
'''Schematics'''
<gallery>
<gallery>
Image:Type_o_front.jpg|Front view.
Tek type o schem.png|Opamp Schematic
Image:Type_o_top.jpg|Top view.
Tek type o preamp.png|Preamp Schematic
Image:Type_o_right.jpg|Right view.
Image:Type_o_left.jpg|Left view.
File:Tek type o adp1.JPG
File:Tek type o adp2.JPG
File:Tek type o preamp.png|Opamp Schematic
File:Tek type o schem.png|Preamp Schematic
</gallery>
</gallery>
==Components==
{{Parts|O}}
[[Category:500 series plugins]]
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