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Difference between revisions of "A"

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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 |
A 545 with a Type A has a system risetime of 18 nanoseconds.  The plug-in uses a 12AU6
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title=Tektronix Type A |
in the front end as a cathode follower.  This input stage drives the second stage, a
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summary=20 MHz amplifier plug-in |
differential amplifier made of two 12AU6 tubesThe second stage drives the output stage,
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image=Tek_type_a_1.jpg |
a pair of cathode followers made of both halves of at 12AT7 tube.  The plate of each output tube
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caption=Tektronix Type 53A |
is connected to the cathode of the other output tube by a 0.005 microfarad capacitor.  This
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series=[[500-series scopes]] |
is intended to improve high-frequency balance.
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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]].
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It provides two inputs and has a switch to select between them.
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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/
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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. 
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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.
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Although 1959 was the first year one could find a "Type A" in the catalog, the same
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instrument with earlier "Type 53/54A" nomenclature was in the August 1956
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Short Form catalog, and its slower Type 53A ancestor was in the August 1954
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catalog which introduced the first 500-series scopes, the [[531]] and the [[535]].
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Type 53A has only three tubes, and a bandwidth of 10 MHz in the 530 mainframes.
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Tek never documented its performance in the 540 mainframes.
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Type A was the first letter-series plug-in to be discontinued, in 1962.
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Customers were told to get Type [[B]] instead, although it cost more.
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==Specifications==
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[[Category:Specifications needed]]''Please add''
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==Pictures==
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<gallery>
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53A 1.JPG|53A front
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53A 2.JPG|53A chassis
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53A 3.JPG|53A chassis bottom
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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
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</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