3A2: Difference between revisions

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{{Plugin Sidebar 2|
{{Plugin Sidebar
title=Tektronix Type 3A2 |
|manufacturer=Tektronix
summary=Dual trace amplifier plugin |
|series=560-series scopes
image=3a2 front.jpg |  
|type=3A2
caption=Type 3A2 front view |
|summary=500 kHz dual-trace amplifier plug-in
series=[[560-series scopes]] |
|image=Tek 3a2 front.jpeg
introduced=1964 |
|caption=Type 3A2 Front View
discontinued=1974 |
|introduced=1964
manuals=
|discontinued=1974
* [http://w140.com/mmm/tek-3a2.pdf Tektronix 3A2 Manual (PDF)]
|manuals=
* [http://bama.edebris.com/download/tek/3a2/3a2.djvu Tektronix 3A2 Manual (DjVu)]
* [[Media:070-354.pdf|Tektronix 3A2 Manual]]
<small>
'''Alternate copy'''
* [https://bama.edebris.com/download/tek/3a2/3a2.djvu Tektronix 3A2 manual] (DjVu @ BAMA)
</small>
}}
}}
The '''Tektronix Type 3A2''' is a dual-trace amplifier plug-in [[introduced in 1963]] for [[560-series scopes]].
The '''Tektronix 3A2''' is a 500 kHz dual-trace amplifier plug-in [[introduced in 1963]] for [[560-series scopes]].
It was designed for compatibility with the digital unit in the [[567]], e.g, the [[6R1]] or [[6R1A]].
It was designed for compatibility with the digital unit in the [[567]], e.g, the [[6R1]] or [[6R1A]].


Line 17: Line 21:
{{Spec | Bandwidth | 500 kHz }}
{{Spec | Bandwidth | 500 kHz }}
{{Spec | Input impedance | 1 MΩ // 47 pF }}
{{Spec | Input impedance | 1 MΩ // 47 pF }}
{{Spec | Deflection factor | 10 mV/div to 25 V/div }}
{{Spec | Deflection   | 10 mV/div to 25 V/div }}
{{EndSpecs}}
{{EndSpecs}}
==Links==
{{Documents|Link=3A2}}


==Internals==
==Internals==
Line 27: Line 34:


The "CHOP" mode of the 3A2 switches back and forth between the two inputs
The "CHOP" mode of the 3A2 switches back and forth between the two inputs
at a rat of a few kilohertz.
at a rate of a few kilohertz.
The signal that causes the switching is generated by a relaxation oscillator
The signal that causes the switching is generated by a relaxation oscillator
formed using a capacitor and a pair of Shockley diodes, D385 and D386.
formed using a capacitor and a pair of [[152-108]] [[Shockley diode]]s, D385 and D386.
 
==Pictures==
==Pictures==
<gallery>
<gallery>
3a2 front.jpg
3a2 front.jpg | 3A2 Front
3a2 left.jpg
3a2 left.jpg | 3A2 Left
3a2 right.jpg
3a2 right.jpg | 3A2 Right
3a2 top.jpg
3a2 top.jpg | 3A2 Top
3a2 bottom.jpg
3a2 bottom.jpg | 3A2 Bottom
Tek 3a2 ch1 input.png|Channel 1 Input Amp
Tek 3a2 ch1 input.png|3A2 Channel 1 Input Amp
Tek 3a2 ch2 input.png|Channel 2 Input Amp
Tek 3a2 ch2 input.png|3A2 Channel 2 Input Amp
Tek 3a2 switching and output.png|Switching and Output Amp
Tek 3a2 switching and output.png|3A2 Switching and Output Amp
Tek 3a2 attenuator switches.png|Attenuator Switches
Tek 3a2 attenuator switches.png|3A2 Attenuator Switches
</gallery>
</gallery>
==Components==
{{Parts|3A2}}


[[Category:560 series plugins]]
[[Category:560 series plugins]]

Latest revision as of 05:47, 29 November 2023

Tektronix 3A2
500 kHz dual-trace amplifier plug-in
Type 3A2 Front View

Compatible with 560-series scopes

Produced from 1964 to 1974

Manuals

Alternate copy

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

The Tektronix 3A2 is a 500 kHz dual-trace amplifier plug-in introduced in 1963 for 560-series scopes. It was designed for compatibility with the digital unit in the 567, e.g, the 6R1 or 6R1A.

Key Specifications

Bandwidth 500 kHz
Input impedance 1 MΩ // 47 pF
Deflection 10 mV/div to 25 V/div

Links

Documents Referencing 3A2

Internals

The input signal passes through compensated attenuators and then into a 12AT7 cathode-follower stage. Channel switching in ALTERNATE mode is done using diodes. The output stage that drives the vertical deflection plates of the scope uses a pair of 6BA8 pentodes.

The "CHOP" mode of the 3A2 switches back and forth between the two inputs at a rate of a few kilohertz. The signal that causes the switching is generated by a relaxation oscillator formed using a capacitor and a pair of 152-108 Shockley diodes, D385 and D386.

Pictures

  • 3A2 Front

    3A2 Front

  • 3A2 Left

    3A2 Left

  • 3A2 Right

    3A2 Right

  • 3A2 Top

    3A2 Top

  • 3A2 Bottom

    3A2 Bottom

  • 3A2 Channel 1 Input Amp

    3A2 Channel 1 Input Amp

  • 3A2 Channel 2 Input Amp

    3A2 Channel 2 Input Amp

  • 3A2 Switching and Output Amp

    3A2 Switching and Output Amp

  • 3A2 Attenuator Switches

    3A2 Attenuator Switches

Components

Some Parts Used in the 3A2

Part Part Number(s) Class Description Used in
12AL5 154-0038-00 Vacuum Tube (Double Diode) high-perveance dual diode 3A2 • 3B2 • 545 • 545A • 549 • N
12AT7 154-0039-00 Vacuum Tube (Dual Triode) dual high-gain triode 161 • 180 • 310 • 310A • 315 • 316 • 360 • 502 • 502A • 511A • 512 • 513 • 513D • 514 • 514AD • 514D • 516 • 524 • 529 • RM529 • 544 • 546 • 547 • 556 • 565 • 570 • 3A2 • 75 • 3A75 • 1M1 • A • B • C • G • H • K • L • ML • M • N • K • R • S • Z
4E50-28 152-108 • 152-0108-00 Discrete component Shockley diode (four-layer diode) 3A2
6BA8 154-0163-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 59 • 2A61 • 72 • 3A72 • 3A2
6DJ8 154-0187-00 • 154-0305-00 Vacuum Tube (Dual Triode) dual triode 132 • 161 • 310A • 316 • 317 • 502 • 502A • 503 • 504 • 506 • 515 • 516 • 519 • 526 • 529 • RM529 • 533 • 535 • 536 • 543 • 544 • 545 • 545A • 545B • 546 • 547 • 549 • 555 • 556 • 561A • 561S • 564 • 565 • 567 • 581 • 581A • 585 • 585A • 661 • 1A4 • 1S1 • 60 • 2A60 • 63 • 2A63 • 67 • 2B67 • 3A1 • 3A1S • 3A2 • 3A3 • 3A6 • 3A7 • 72 • 3A72 • 75 • 3A75 • 4S2 • 51 • 3B1 • 3B1S • 3B2 • 3B3 • 3B4 • 3M1 • 3S76 • 3T77 • 3T77A • 9A1 • 9A2 • 1121 • 80 • 81 • 82 • 86 • B • O • W • Z • Telequipment D56 • Telequipment S32A • Telequipment D52 • S-311 • Telequipment TD51 • Telequipment S52 • Telequipment S51 • Telequipment Type A • TU-4
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