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The Tektronix Type A is a single-channel preamp [[introduced in 1959]] for [[500-series scopes]].
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{{Plugin Sidebar 2 |
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title=Tektronix Type A |
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summary=20 MHz amplifier plug-in |
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image=Tek_type_a_1.jpg |
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caption=Tektronix Type 53A |
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series=[[500-series scopes]] |
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introduced=1954 |
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discontinued=1962 |
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manuals=
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* [http://bama.edebris.com/manuals/tek/a/ Tektronix Type A Manual (PDF)]
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<!-- * [http://w140.com/tek_fcp/tek_type_a_factory_cal_proc.pdf Tektronix Type A Factory Calibration Procedure (PDF)] -->
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* [[Media:tek_manuals_type_a.pdf|Tektronix Type A Manual (PDF, OCR, bad-OCR)]]
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* [[Media:tek_type_a_fcp.pdf|Tektronix Type A Factory Calibration Procedure (PDF, OCR)]]
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}}
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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.
 
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 20MHz.  The plug-in uses a [[12AU6]]
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A [[545]] with a Type A has a system risetime of 18 nanoseconds and a bandwidth of 20 MHz.   
in the front end as a cathode follower.  This input stage drives the second stage, a
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differential amplifier made of two more 12AU6 tubes.  The second stage drives the output stage,
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The plug-in uses a [[12AU6]] in the front end as a cathode follower.   
a pair of cathode followers made of both halves of a [[12AT7]] tube.  The plate of each output tube
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This input stage drives the second stage, a differential amplifier made of two more 12AU6 tubes.   
is connected to the cathode of the other output tube by a 0.005 microfarad capacitor.  This  
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The second stage drives the output stage, a pair of cathode followers made of both halves of  
"cross-coupling" extends the high-frequency response.
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a [[12AT7]] tube.  The plate of each output tube is connected to the cathode of the other output
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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
 
Although 1959 was the first year one could find a "Type A" in the catalog, the same
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Short Form catalog, and its slower Type 53A ancestor was in the August 1954
 
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]].
 
catalog which introduced the first 500-series scopes, the [[531]] and the [[535]].
Type 53A has only three tubes, and a bandwidth of 10MHz in the 530 mainframes.
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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.
 
Tek never documented its performance in the 540 mainframes.
  
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Customers were told to get Type [[B]] instead, although it cost more.
 
Customers were told to get Type [[B]] instead, although it cost more.
  
* [http://bama.edebris.com/manuals/tek/a/ Tektronix Type A Manual (PDF)]
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==Specifications==
* [http://w140.com/tek_fcp/tek_type_a_factory_cal_proc.pdf Tektronix Type A Factory Calibration Procedure (PDF)]
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[[Category:Specifications needed]]''Please add''
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==Pictures==
  
 
<gallery>
 
<gallery>
53A 1.JPG|front
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53A 1.JPG|53A front
53A 2.JPG|chassis
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53A 2.JPG|53A chassis
53A 3.JPG|chassis bottom
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53A 3.JPG|53A chassis bottom
File:Tek type a schem.png|schematic
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Tek 53-54a front.jpg|53/54A front
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Tek 53-54a top.jpg|53/54A top (dirty, missing two tubes)
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Tek 53-54a bottom.jpg|53/54A bottom
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Tek 53-54a left.jpg|53/54A left
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Tek 53-54a rear.jpg|53/54A rear
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Tek type a 1.jpg|Type A front
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Tek type a schem.png|schematic
 
</gallery>
 
</gallery>
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[[Category:500 series plugins]]

Latest revision as of 17:13, 14 October 2018

Tektronix Type A
20 MHz amplifier plug-in
Tektronix Type 53A

Compatible with 500-series scopes

Produced from 1954 to 1962

Manuals
Manuals – Specifications – Links – Pictures

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