3A1S: Difference between revisions
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m (clean up, replaced: title=Tektronix → manufacturer=Tektronix |series=560-series scopes |type=, {{Plugin Sidebar 2 → {{Plugin Sidebar, series=560-series scopes → designers=) |
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{{Plugin Sidebar | {{Plugin Sidebar| | ||
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 | | ||
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introduced=1961 | | introduced=1961 | | ||
discontinued=(?) | | discontinued=(?) | | ||
designers= | | |||
manuals= | manuals= | ||
[ | * [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]]. | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
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{{Spec | Input impedance | 1 MΩ // 47 pF }} | {{Spec | Input impedance | 1 MΩ // 47 pF }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
==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== | ==Pictures== |
Revision as of 12:26, 14 August 2021
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) |
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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
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3A1S input amplifier and switching
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3A1S output amplifier