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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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The Tektronix Type A is a single-channel preamp [[introduced in 1959]] for [[500-series scopes]].
A 545 with a Type A has a system risetime of 18 nanoseconds.  The plug-in uses a 12AU6
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A [[545]] with a Type A has a system risetime of 18 nanoseconds.  The plug-in uses a [[12AU6]]
 
in the front end as a cathode follower.  This input stage drives the second stage, a
 
in the front end as a cathode follower.  This input stage drives the second stage, a
 
differential amplifier made of two 12AU6 tubes.  The second stage drives the output stage,
 
differential amplifier made of two 12AU6 tubes.  The second stage drives the output stage,
a pair of cathode followers made of both halves of at 12AT7 tube.  The plate of each output tube
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a pair of cathode followers made of both halves of at [[12AT7]] tube.  The plate of each output tube
 
is connected to the cathode of the other output tube by a 0.005 microfarad capacitor.  This  
 
is connected to the cathode of the other output tube by a 0.005 microfarad capacitor.  This  
 
is intended to improve high-frequency balance.
 
is intended to improve high-frequency balance.

Revision as of 05:55, 5 July 2010

The Tektronix Type A is a single-channel preamp introduced in 1959 for 500-series scopes. A 545 with a Type A has a system risetime of 18 nanoseconds. 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 12AU6 tubes. The second stage drives the output stage, a pair of cathode followers made of both halves of at 12AT7 tube. The plate of each output tube is connected to the cathode of the other output tube by a 0.005 microfarad capacitor. This is intended to improve high-frequency balance.