Difference between revisions of "3A1S"

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The Tektronix 3A1S is a vertical plug-in for the [[561#561S|561S]].
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{{Plugin Sidebar 2|
It is specified to have an input impedance of 47pF in parallel with 1 megohm.
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title=Tektronix 3A1S |
Input sensitivity in a 561S is from 10mV/div to 10V/div.
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summary=25 MHz vertical amplifier|
Risetime is specified to be 14ns, giving a -3dB frequency of 25MHz.
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image=Tek 3a1s.jpg |
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caption=3A1S front view |
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introduced=1961 |
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discontinued=(?) |
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series=[[560-series scopes]]|
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manuals=* [http://w140.com/tek-561s.pdf Tektronix 561S / 3A1S / 3B1S Manual (PDF)]
  
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}}
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The '''Tektronix 3A1S''' is a vertical plug-in for the [[561#561S|561S]].
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{{BeginSpecs}}
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{{Spec | Deflection      | from 10 mV/Div to 10 V/Div (in a 561S)  }}
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{{Spec | Bandwidth      | 25 MHz }}
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{{Spec | Rise time      | 14 ns }}
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{{Spec | Input impedance | 1 MΩ // 47 pF }}
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{{EndSpecs}}
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==Internals==
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The input signal passes through a compensated attenuator switch and
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then into a [[7586]] cathode-follower biased with 2 mA plate current.
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The gain stages use a mix of transistors and  output stage driving the
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deflection plates is a transistor/pentode cascode circuit with T-coil loading.
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The 3A1S is built in traditional ceramic-strip construction.
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==Pictures==
 
<gallery>
 
<gallery>
File:Tek-561s vert1.png
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File:Tek 3a1s.jpg
File:Tek-561s vert2.png
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File:Tek 3a1s left.jpg
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File:Tek 3a1s right.jpg
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File:Tek-561s vert1.png|3A1S input amplifier and switching
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File:Tek-561s vert2.png|3A1S output amplifier
 
</gallery>
 
</gallery>
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[[Category:560 series plugins]]

Latest revision as of 17:43, 19 April 2016

Tektronix 3A1S
25 MHz vertical amplifier
3A1S front view

Compatible with 560-series scopes

Produced from 1961 to (?)

Manuals
Manuals – Specifications – Links – Pictures

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

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