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(New page: The Tektronix 121 is a wideband preamplifier intended for 511 scopes. * [http://bama.edebris.com/download/tek/121/tek%20121.pdf Tektronix 121 Manual (PDF)] <gallery> Image:Tek 121.jp...)
 
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The Tektronix 121 is a wideband preamplifier intended for [[511]] scopes.
{{Instrument Sidebar
|manufacturer=Tektronix
|model=121
|class=Amplifier
|series=
|summary=Wideband preamplifier
|image=Tek 121 front.jpg
|caption=Tek 121 front
|introduced=1950
|discontinued=(?)
|designers=
|manuals=
* [[Media:IM-121.pdf|Tektronix 121 Manual]]
* [[Media:Tek_type_121_factory_cal_proc.pdf|Tektronix 121 Factory Calibration Procedure]]
}}
The '''Tektronix 121''' is a wideband preamplifier intended for [[511]] scopes.  The [[1121]] can be considered the successor to the 121.


* [http://bama.edebris.com/download/tek/121/tek%20121.pdf Tektronix 121 Manual (PDF)]
{{MissingSpecs}}
Its voltage gain is 100, input impedance is 1 MΩ in parallel with 25 pF, frequency response is 5 Hz to 12 MHz.


==Internals==
The 121 has an unbalanced signal path with switchable compensated attenuators before and after the first gain stage, a [[6CB6]] common-cathode amplifier. 
==Comparison of 121 and 112==
The 121 and [[112]] are both standalone amplifiers produced by Tektronix in the 1950s.
A comparison shows their differences.
:{|class="wikitable" border="1" style="text-align: center;"
! scope="col" |
! scope="col" | 121
! scope="col" | 112
|-
! scope="col" | Bandwidth
| 5 Hz to 12 MHz
| DC to 2 MHz
|-
! scope="col" | Voltage Gain
| 100
| 5000
|-
! scope="row" | Year of Introduction
| 1950
| 1950
|-
! scope="row" | Weight
| 18 lbs (8 kg)
| 32 lbs (15 kg)
|-
! scope="row" | Price in 1950 catalog
| $265
| $495
|-
! scope="row" | Front View
| style="vertical-align:bottom;" | [[File:Tek_121_front.jpg|100px]]
| [[File:Tek_112_front_crop.jpg|100px]]
|-
|}
==Picturess==
<gallery>
<gallery>
Image:Tek 121.jpg
Tek 121 front.jpg
Tek 121 bottom.jpg
Tek 121 left.jpg
Tek 121 right.jpg
Tek 121 top.jpg
Tek-121-block.png|Block diagram
</gallery>
</gallery>
[[Category:Amplifiers]]

Latest revision as of 12:02, 21 September 2023

Tektronix 121
Wideband preamplifier
Tek 121 front

Produced from 1950 to (?)

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

The Tektronix 121 is a wideband preamplifier intended for 511 scopes. The 1121 can be considered the successor to the 121.

Key Specifications

  • please add

Its voltage gain is 100, input impedance is 1 MΩ in parallel with 25 pF, frequency response is 5 Hz to 12 MHz.

Internals

The 121 has an unbalanced signal path with switchable compensated attenuators before and after the first gain stage, a 6CB6 common-cathode amplifier.

Comparison of 121 and 112

The 121 and 112 are both standalone amplifiers produced by Tektronix in the 1950s. A comparison shows their differences.

121 112
Bandwidth 5 Hz to 12 MHz DC to 2 MHz
Voltage Gain 100 5000
Year of Introduction 1950 1950
Weight 18 lbs (8 kg) 32 lbs (15 kg)
Price in 1950 catalog $265 $495
Front View

Picturess