Difference between revisions of "3A1S"

From TekWiki
Jump to: navigation, search
(headline)
Line 11: Line 11:
 
}}
 
}}
 
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]].
 
The input signal passes through a compensated attenuator switch and
 
then into a [[7586]] cathode-follower biased with 2 mA plate current.
 
  
 
{{BeginSpecs}}
 
{{BeginSpecs}}
Line 21: Line 18:
 
{{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-coli loading.
 +
 +
The 3A1S is built in traditional ceramic-strip construction.
  
 
==Pictures==
 
==Pictures==

Revision as of 01:51, 10 December 2015

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-coli loading.

The 3A1S is built in traditional ceramic-strip construction.

Pictures