A: Difference between revisions

From TekWiki
Jump to navigation Jump to search
No edit summary
No edit summary
(23 intermediate revisions by 6 users not shown)
Line 1: Line 1:
The Tektronix Type A is a single-channel preamp introduced in 1959 for 500-series scopes.
{{Plugin Sidebar 2 |
A 545 with a Type A has a system risetime of 18 nanoseconds.  The plug-in uses a 12AU6
title=Tektronix Type A |
in the front end as a cathode follower.  This input stage drives the second stage, a
summary=20 MHz amplifier plug-in |
differential amplifier made of two 12AU6 tubes.  The second stage drives the output stage,
image=Tek_type_a_1.jpg |
a pair of cathode followers made of both halves of at 12AT7 tubeThe plate of each output tube
caption=Tektronix Type 53A |
is connected to the cathode of the other output tube by a 0.005 microfarad capacitor.  This
series=[[500-series scopes]] |
is intended to improve high-frequency balance.
introduced=1954 |
discontinued=1962 |
manuals=
* [http://bama.edebris.com/manuals/tek/a/ Tektronix Type A Manual (PDF)]
<!-- * [http://w140.com/tek_fcp/tek_type_a_factory_cal_proc.pdf Tektronix Type A Factory Calibration Procedure (PDF)] -->
* [[Media:tek_manuals_type_a.pdf|Tektronix Type A Manual (PDF, OCR, bad-OCR)]]
* [[Media:tek_type_a_fcp.pdf|Tektronix Type A Factory Calibration Procedure (PDF, OCR)]]
* [[Media:Tek 53a cal outline.pdf|Tektronix Type A Calibration Outline (PDF, OCR)]]
}}
The '''Tektronix Type A''' is a single-channel preamp [[introduced in 1959]] for [[500-series scopes]].
It provides two inputs and has a switch to select between them.
A [[545]] with a Type A has a system risetime of 18 nanoseconds and a bandwidth of 20 MHz.   


* http://bama.edebris.com/manuals/tek/a/
The plug-in uses a [[12AU6]] in the front end as a cathode follower. 
* http://w140.com/tek_fcp/tek_type_a_factory_cal_proc.pdf
This input stage drives the second stage, a differential amplifier made of two more 12AU6 tubes. 
The second stage drives the output stage, a pair of cathode followers made of both halves of
a [[12AT7]] tube.  The plate of each output tube is connected to the cathode of the other output
tube by a 5 nF capacitor. This "cross-coupling" extends the high-frequency response.
 
Although 1959 was the first year one could find a "Type A" in the catalog, the same
instrument with earlier "Type 53/54A" nomenclature was in the August 1956
Short Form catalog, and its slower Type 53A ancestor was in the August 1954
catalog which introduced the first 500-series scopes, the [[531]] and the [[535]].
Type 53A has only three tubes, and a bandwidth of 10 MHz in the 530 mainframes.
Tek never documented its performance in the 540 mainframes.
 
Type A was the first letter-series plug-in to be discontinued, in 1962.
Customers were told to get Type [[B]] instead, although it cost more.
 
==Specifications==
[[Category:Specifications needed]]''Please add''
 
==Pictures==
 
<gallery>
53A 1.JPG|53A front
53A 2.JPG|53A chassis
53A 3.JPG|53A chassis bottom
Tek 53-54a front.jpg|53/54A front
Tek 53-54a top.jpg|53/54A top (dirty, missing two tubes)
Tek 53-54a bottom.jpg|53/54A bottom
Tek 53-54a left.jpg|53/54A left
Tek 53-54a rear.jpg|53/54A rear
Tek type a 1.jpg|Type A front
Tek type a schem.png|schematic
</gallery>
 
 
[[Category:500 series plugins]]

Revision as of 18:00, 3 May 2021

Template:Plugin Sidebar 2 The Tektronix Type A is a single-channel preamp introduced in 1959 for 500-series scopes. It provides two inputs and has a switch to select between them. A 545 with a Type A has a system risetime of 18 nanoseconds and a bandwidth of 20 MHz.

The plug-in uses a 12AU6 in the front end as a cathode follower. This input stage drives the second stage, a differential amplifier made of two more 12AU6 tubes. The second stage drives the output stage, a pair of cathode followers made of both halves of a 12AT7 tube. The plate of each output tube is connected to the cathode of the other output tube by a 5 nF capacitor. This "cross-coupling" extends the high-frequency response.

Although 1959 was the first year one could find a "Type A" in the catalog, the same instrument with earlier "Type 53/54A" nomenclature was in the August 1956 Short Form catalog, and its slower Type 53A ancestor was in the August 1954 catalog which introduced the first 500-series scopes, the 531 and the 535. Type 53A has only three tubes, and a bandwidth of 10 MHz in the 530 mainframes. Tek never documented its performance in the 540 mainframes.

Type A was the first letter-series plug-in to be discontinued, in 1962. Customers were told to get Type B instead, although it cost more.

Specifications

Please add

Pictures