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|designers=Hiro Moriyasu
|designers=Hiro Moriyasu
|manuals=
|manuals=
* [[Media:070-323.pdf|Tektronix Type O Manual]] (PDF)
* [[Media:070-323.pdf|Tektronix Type O Manual]]
* [[Media:Tek type o preliminary no ocr.pdf|Tektronix Type O Preliminary Manual]] (needs OCR)
* [[Media:Tek type o preliminary.pdf|Tektronix Type O Preliminary Manual]]
* [[Media:Tek type o irb.pdf|Tektronix Type O Instrument Reference Book]] (OCR)
* [[Media:Tek type o irb.pdf|Tektronix Type O Instrument Reference Book]] (OCR)
<small>
'''Accessories'''
* [[Media:070-0386-01.pdf|Tektronix 013-067 Log Adapter Manual]] (bad-OCR)
* [[Media:Tek type o grid current checker.pdf|Grid Current Checker for Type O]]
* [[Media:Tek type o ac coupler.pdf|Tektronix Type O AC Coupler]]


'''Applications'''
'''Applications'''
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</small>
</small>
}}
}}
The '''Tektronix Type O''' is a [[letter-series and 1-series plug-ins|letter-series plug-in]] that contains two op-amps.
 
It was designed by [[Hiro Moriyasu]].
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.
It was [[introduced in 1962|introduced in mid-1962]] and was available through 1973.


The input and feedback networks of the op-amps can be configured from the front panel using knobs and/or user-supplied components.
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.
There are sockets on the front panel for banana plugs.
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.


Type O also has a regular signal input that does not involve the op-amps. 
A mode switch selects the display to be taken from either op-amp's output, or the vertical amplifier input.
A mode switch selects which op-amp's output will be displayed, or the regular signal input.


The Type O can be used with the included [[013-0049-01]] blank covers, a custom feedback network connected externally or built into a [[013-0048-01]] adapter box,
{{BeginSpecs}}
a [[013-081]] compensating adapter to increase its bandwidth, a [[013-068]] Gating Adapter, a [[013-0086-00]] Leakage Current Adapter, or a [[013-0067-00]] Logarithmic Amplifier.
{{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>


{{MissingSpecs}}
===Accessories===
Regular signal bandwidth is 25 MHz, maximum sensitivity is 50 mV/div, op-amp gain-bandwidth product is 15 MHz, and open-loop DC gain is 2500.
{{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==
==Prices==
* $625 in 1971 ($4,200 in 2021 dollars)
* $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==
==Pictures==
<gallery>
<gallery>
Tek Type O front.jpg | Front view
Tek Type O front.jpg       | Front view
Type_o_front.jpg|Front view
Tek_Type_O_front_Peter.jpg | Front view
Type_o_top.jpg|Top view
Type_o_top.jpg             | Top view
Type_o_right.jpg|Right view
Type_o_right.jpg           | Right view
Type_o_left.jpg|Left view
Type_o_left.jpg           | Left view
Type-o.jpg
Type-o.jpg
Tek type o adp1.JPG
Tek type o adp1.JPG
Tek type o adp2.JPG
Tek type o adp2.JPG
Tek type o schem.png|Opamp Schematic
Tek type o preamp.png|Preamp Schematic
Tek o fr1.jpg
Tek o fr1.jpg
Tek o fr2.jpg
Tek o fr2.jpg
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</gallery>
</gallery>


'''Schematics'''
<gallery>
Tek type o schem.png|Opamp Schematic
Tek type o preamp.png|Preamp Schematic
</gallery>
==Components==
{{Parts|O}}
{{Parts|O}}


[[Category:500 series plugins]]
[[Category:500 series plugins]]
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