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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 | title=Tektronix Type A | | ||
summary=20 MHz amplifier plug-in | | |||
image=Tek_type_a_1.jpg | | |||
caption=Tektronix Type 53A | | |||
series=[[500-series scopes]] | | |||
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)]] | |||
}} | |||
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== | |||
[[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 17:13, 14 October 2018
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
-
53A front
-
53A chassis
-
53A chassis bottom
-
53/54A front
-
53/54A top (dirty, missing two tubes)
-
53/54A bottom
-
53/54A left
-
53/54A rear
-
Type A front
-
schematic