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D: Difference between revisions
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six tubes, on a shock-mounted subchassis to avoid microphonics. | six tubes, on a shock-mounted subchassis to avoid microphonics. | ||
Type D was [[introduced in 1954|introduced]] with the [[531]] and [[535]] in [[introduced in 1954|1954]] as Type 53D | Type D was [[introduced in 1954|introduced]] with the [[531]] and [[535]] in [[introduced in 1954|1954]] as Type 53D. | ||
was briefly renamed Type 53D/54D in 1955 with the introduction of the [[541]] and [[545]], then quickly renamed Type 53/54D | It was briefly renamed Type 53D/54D in 1955 with the introduction of the [[541]] and [[545]], | ||
then shortened to Type D in 1959 with the introduction of the 5xxA scopes. | and then quickly renamed Type 53/54D. | ||
by the constant-bandwidth model [[1A6]]. | Its name was then shortened to Type D in 1959 with the introduction of the 5xxA scopes. | ||
Its last year was 1968, having been superseded by the constant-bandwidth model [[1A6]]. | |||
[[K]], [[L]], and [[T]] are tied for longest production life, at 16 years. | [[K]], [[L]], and [[T]] are tied for longest production life, at 16 years. | ||