3A1S: Difference between revisions

Revision as of 11:26, 14 August 2021

Tektronix 3A1S
25 MHz vertical amplifier 3A1S front view Compatible with 560-series scopes Produced from 1961 to (?) Manuals Tektronix 561S / 3A1S / 3B1S Manual (PDF) (All manuals in PDF format unless noted otherwise)

The Tektronix 3A1S is a vertical plug-in for the 561S.

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.

@@ Line 1: / Line 1: @@
-{{Plugin Sidebar 2|
+{{Plugin Sidebar|
-title=Tektronix 3A1S |
+manufacturer=Tektronix |series=560-series scopes |type= 3A1S |
 summary=25 MHz vertical amplifier|
 image=Tek 3a1s.jpg |
@@ Line 6: / Line 6: @@
 introduced=1961 |
 discontinued=(?) |
-series=[[560-series scopes]]|
+designers= |
-manuals=* [http://w140.com/tek-561s.pdf Tektronix 561S / 3A1S / 3B1S Manual (PDF)]
+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]].
@@ Line 20: / Line 20: @@
 ==Internals==
-The input signal passes through a compensated attenuator switch and
+The input signal passes through a compensated attenuator switch and then into a [[7586]] cathode-follower biased with 2 mA plate current.
-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
+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.
-deflection plates is a transistor/pentode cascode circuit with T-coil loading.
 The 3A1S is built in traditional ceramic-strip construction.