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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. | |||
{{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> | ||
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 11:02, 21 September 2023
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
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Block diagram
