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used as shorthand for the official "Type 53C" and "Type 53/54C" nomenclatures. | used as shorthand for the official "Type 53C" and "Type 53/54C" nomenclatures. | ||
The Type 53C is a dual-trace | The Type 53C is a dual-trace plug-in for [[500-series scopes]]. | ||
It was introduced along with the [[531]] and [[535]] mainframes in 1954. | It was [[introduced in 1954|introduced]] along with the [[531]] and [[535]] mainframes in 1954. | ||
In those scopes (Tek never documented its performance in the 540's), | In those scopes (Tek never documented its performance in the 540's), | ||
its bandwidth is 8.5MHz, and like most letter-series | its bandwidth is 8.5MHz, and like most letter-series plug-ins, | ||
its maximum vertical sensitivity is 50mV/div. Unlike Type [[A]] | its maximum vertical sensitivity is 50mV/div. Unlike the Type [[A]] | ||
and Type [[B]], Type C had the ability to invert the signal | and Type [[B]], the Type C had the ability to invert the signal | ||
before display. | before display. | ||
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At 15 tubes, the Type 53/54C and Type CA have the highest | At 15 tubes, the Type 53/54C and Type CA have the highest | ||
tube count of any letter-series | tube count of any letter-series plug-in. Each channel consists | ||
of a 6AK5 cathode-follower driving a 12AU6 differential pair | of a [[6AK5]] cathode-follower driving a [[12AU6]] differential pair | ||
which drives a 6AU6 differential pair. The two channels | which drives a [[6AU6]] differential pair. The two channels | ||
converge on a 12AT7 cross-coupled cathode-follower. Four | converge on a [[12AT7]] cross-coupled cathode-follower. Four | ||
more tubes, a 6AL5 and three 12AT7's, comprise a logic circuit | more tubes, a [[6AL5]] and three 12AT7's, comprise a logic circuit | ||
which determines which channel drives the output at any | which determines which channel drives the output at any | ||
given moment. The options are A, B, CHOPPED, or ALT. | given moment. The options are A, B, CHOPPED, or ALT. | ||
* http://w140.com/tek_fcp/tek_type_c_factory_cal_proc.pdf | * http://w140.com/tek_fcp/tek_type_c_factory_cal_proc.pdf | ||