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Max sensitivity is 50mV/div, and bandwidth in a [[545]] is 30MHz.
Max sensitivity is 50mV/div, and bandwidth in a [[545]] is 30MHz.
Type 53K/54K was [[introduced in 1955|introduced in March 1955]] along with the 541/545.
At that time, it was the only plugin that could utilize the
new mainframes' speed; the redesigned Types [[A]], [[B]], and [[C]]
weren't ready until August 1956.  In August 1955, just five months
after introduction, it was renamed Type 53/54K, and, in 1959,
when the 541A/545A mainframes came out, it got its final name, Type K.
It was dropped after 1970.


Type K was the fastest of the single-channel plugins.
Type K was the fastest of the single-channel plugins.
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The name was deliberately chosen to be halfway into the alphabet.  Slow
The name was deliberately chosen to be halfway into the alphabet.  Slow
plugins would use A-J and fast ones L-Z.  This idea never went anywhere.
plugins would use A-J and fast ones L-Z.  This idea never went anywhere.
Type 53K/54K was [[introduced in 1955|introduced in March 1955]] along with the 541/545.
At that time, it was the only plugin that could utilize the
new mainframes' speed; the redesigned Types [[A]], [[B]], and [[C]]
weren't ready until August 1956.  In August 1955, just five months
after introduction, it was renamed Type 53/54K, and, in 1959,
when the 5xxA mainframes came out, it got its final name, Type K.
It was dropped after 1970.


Late versions had a [[Connectors#BNC|BNC connector]] instead of a
Late versions had a [[Connectors#BNC|BNC connector]] instead of a
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