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The Tektronix Type A is a single-channel preamp [[introduced in 1959]] for [[500-series scopes]]. | 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 20MHz. The plug-in uses a [[12AU6]] | A [[545]] with a Type A has a system risetime of 18 nanoseconds and a bandwidth of 20MHz. 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 | ||