3A3: Difference between revisions
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* [[Media:Tek 3a3 cal outline.pdf|Tektronix 3A3 Calibration Outline]] (OCR) | * [[Media:Tek 3a3 cal outline.pdf|Tektronix 3A3 Calibration Outline]] (OCR) | ||
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The '''Tektronix | The '''Tektronix 3A3''' is a dual-trace differential amplifier plug-in for [[560-series scopes]]. | ||
It was designed by [[Roy Hayes]]. | It was designed by [[Roy Hayes]]. | ||
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{{Spec | Input impedance | 1 MΩ // 47 pF }} | {{Spec | Input impedance | 1 MΩ // 47 pF }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
==Links== | |||
{{Documents|Link=3A3}} | |||
{{PatentLinks|3A3}} | |||
==Internals== | ==Internals== |
Latest revision as of 05:25, 13 July 2024
The Tektronix 3A3 is a dual-trace differential amplifier plug-in for 560-series scopes. It was designed by Roy Hayes.
Key Specifications
Bandwidth | 500 kHz or 5 kHz (switch-selectable) |
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Deflection | 0.1 mV/Div to 10 V/Div, in 1−2−5 steps |
Input impedance | 1 MΩ // 47 pF |
Links
Documents Referencing 3A3
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Patents that may apply to 3A3
Page | Title | Inventors | Filing date | Grant date | Links |
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Patent US 3423685A | Bootstrapped cascode differential amplifier | Roy Hayes | 1964-08-27 | 1969-01-21 | 3A3 |
Internals
Early 3A3s use a 7586 Nuvistor for the front end cathode follower. Serial numbers 4990 and up use a dual JFET.
Pictures
Older version (below SN 4990, Nuvistor in input stage)
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3A3 Front
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3A3 Right
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3A3 Left
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3A3, Nuvistor in Input Stage
Newer version (from SN 4990 up, FET in input stage)
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3A3 Front
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3A3 Right
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3A3 Left
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3A3 Top
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3A3 Bottom
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3A3, Dual JFET in Input Stage