3A1S: Difference between revisions
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{{Plugin Sidebar| | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=25 MHz vertical amplifier| | |series=561S | ||
image=Tek 3a1s.jpg | | |type=3A1S | ||
caption=3A1S | |summary=25 MHz vertical sampling amplifier plug-in | ||
|image=Tek 3a1s.jpg | |||
|caption=Tektronix 3A1S | |||
|introduced=1961 | |||
manuals= | |discontinued=(?) | ||
[[ | |manuals= | ||
* [[Media:070-417.pdf|Tektronix 561S/3A1S/3B1S Manual 070-417]] | |||
}} | }} | ||
The Tektronix 3A1S is a | The '''Tektronix 3A1S''' is a Vertical Sampling Amplifier Plug-in for the [[561#561S|561S]]. | ||
It does not work in other 560-series mainframes. | |||
{{BeginSpecs}} | |||
{{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}} | |||
==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== | ||
<gallery> | <gallery> | ||
Tek 3a1s.jpg | |||
Tek 3a1s left.jpg | |||
Tek 3a1s right.jpg | |||
Tek-561s vert1.png|3A1S input amplifier and switching | |||
Tek-561s vert2.png|3A1S output amplifier | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|3A1S}} | |||
[[Category:560 series plugins]] | |||
Latest revision as of 00:30, 29 November 2023
The Tektronix 3A1S is a Vertical Sampling Amplifier Plug-in for the 561S.
It does not work in other 560-series mainframes.
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
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3A1S input amplifier and switching
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3A1S output amplifier
