A: Difference between revisions

Jump to navigation Jump to search

A (view source)

Revision as of 22:26, 8 October 2021

5 bytes added ,  8 October 2021
re-sorted paragraphs and removed contradiction
(make text match artwork better)
(re-sorted paragraphs and removed contradiction)
Line 20: Line 20:
A [[545]] with a Type A has a system risetime of 18 nanoseconds and a bandwidth of 20 MHz.   
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. 
Although 1959 was the first year one could find a "Type A" in the catalog, the same instrument  
This input stage drives the second stage, a differential amplifier made of two more 12AU6 tubes. 
with earlier "Type 53/54A" nomenclature was in the August 1956 Short Form catalog, and its  
The second stage drives the output stage, a pair of cathode followers made of both halves of
Type 53A ancestor was in the August 1954 catalog which introduced the first 500-series scopes,  
a [[12AT7]] tube.  The plate of each output tube is connected to the cathode of the other output
the [[531]] and the [[535]].
tube by a 5 nF capacitor.  This "cross-bootstrapping" 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 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, no [[T-coil peaking|T-coils]] or cross-bootstrap, and a bandwidth of 10 MHz in the 530 mainframes.
Catalogs don't list 53A performance in the 540 mainframes.  The Factory Cal Procedure says 20 MHz, but this is wrong.  (A Type 53A's measured 3dB point was around 17MHz while a Type A made 23MHz. Furthermore, the front-panel artwork reads ".017 usec" for 53A and .015 for A.)


Type A was the first letter-series plug-in to be discontinued, in 1962.
Type A was the first letter-series plug-in to be discontinued, in 1962.
Line 37: Line 30:
==Specifications==
==Specifications==
[[Category:Specifications needed]]''Please add''
[[Category:Specifications needed]]''Please add''
Bandwidth is 10 MHz in the 530 mainframes.
Catalogs don't list 53A performance in the 540 mainframes.  The Factory Cal Procedure says 20 MHz, but this is wrong.  (A Type 53A's measured 3 dB point was around 17 MHz while a Type A made 23 MHz. Furthermore, the front-panel artwork reads ".017 usec" for 53A and .015 for A.)
==Internals==
Type 53A has only three tubes, and no [[T-coil peaking|T-coils]].
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-bootstrapping" extends the high-frequency response.


==Pictures==
==Pictures==
Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/69393"

Navigation menu