3A1S: Difference between revisions

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{{Plugin Sidebar|
{{Plugin Sidebar|
title=Tektronix 3A1S |
manufacturer=Tektronix |series=560-series scopes |type= 3A1S |
summary=25 MHz vertical amplifier|
summary=25 MHz vertical amplifier|
image=Tek 3a1s.jpg |  
image=Tek 3a1s.jpg |  
caption=3A1S front view|
caption=3A1S front view |
years=1961? – ? |
introduced=1961 |
type=Vertical Amplifier|
discontinued=(?) |
series=[[560-series scopes]]|
designers= |
manuals=
manuals=
[[Category:Manual needed]]
* [http://w140.com/tek-561s.pdf Tektronix 561S / 3A1S / 3B1S Manual (PDF)]
}}
}}
The Tektronix 3A1S is a vertical plug-in for the [[561#561S|561S]].
The '''Tektronix 3A1S''' is a vertical plug-in for the [[561#561S|561S]].


The input signal passes through a compensated attenuator switch and
{{BeginSpecs}}
then into a [[7586]] cathode-follower biased with 2 mA plate current.
{{Spec | Deflection      | from 10 mV/Div to 10 V/Div (in a 561S)  }}
{{Spec | Bandwidth      | 25 MHz }}
{{Spec | Rise time      | 14 ns }}
{{Spec | Input impedance | 1 MΩ // 47 pF }}
{{EndSpecs}}


==Specifications==
==Internals==
The input signal passes through a compensated attenuator switch and then into a [[7586]] cathode-follower biased with 2 mA plate current.


* Deflection: from 10 mV/Div to 10 V/Div (in a 561S)
The gain stages use a mix of transistors and  output stage driving the deflection plates is a transistor/pentode cascode circuit with T-coil loading.
* Rise time: 14 ns
 
* Bandwidth: 25 MHz
The 3A1S is built in traditional ceramic-strip construction.
* Input impedance: 1 MΩ || 47 pF


==Pictures==
==Pictures==
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File:Tek-561s vert2.png|3A1S output amplifier
File:Tek-561s vert2.png|3A1S output amplifier
</gallery>
</gallery>
[[Category:560 series plugins]]

Revision as of 12:26, 14 August 2021

Tektronix 3A1S
25 MHz vertical amplifier
3A1S front view

Compatible with 560-series scopes

Produced from 1961 to (?)

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

The Tektronix 3A1S is a vertical plug-in for the 561S.

Key Specifications

Deflection from 10 mV/Div to 10 V/Div (in a 561S)
Bandwidth 25 MHz
Rise time 14 ns
Input impedance 1 MΩ // 47 pF

Internals

The input signal passes through a compensated attenuator switch and then into a 7586 cathode-follower biased with 2 mA plate current.

The gain stages use a mix of transistors and output stage driving the deflection plates is a transistor/pentode cascode circuit with T-coil loading.

The 3A1S is built in traditional ceramic-strip construction.

Pictures