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The Tektronix Type A is a single-channel preamp [[introduced in 1959]] for [[500-series scopes]]. | {{Plugin Sidebar 2 | | ||
title=Tektronix Type A | | |||
summary=20 MHz amplifier plug-in | | |||
image=53A 1.JPG | | |||
caption=Tektronix Type A | | |||
series=[[500-series scopes]] | | |||
introduced=1959 | | |||
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)] | |||
}} | |||
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 | 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 | |||
differential amplifier made of two more 12AU6 tubes. The second stage drives the output stage, | 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 | 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 | The second stage drives the output stage, a pair of cathode followers made of both halves of | ||
"cross-coupling" extends the high-frequency response. | 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 | 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 | 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. | ||
==Specifications== | |||
[[Category:Specifications needed]]''Please add'' | |||
==Pictures== | |||
<gallery> | <gallery> | ||
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File:Tek type a schem.png|schematic | File:Tek type a schem.png|schematic | ||
</gallery> | </gallery> | ||
[[Category:500 series plugins]] | |||