D: Difference between revisions
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Type D was [[introduced in 1954|introduced]] with the [[531]] and [[535]] in 1954 as Type 53D, | Type D was [[introduced in 1954|introduced]] with the [[531]] and [[535]] in 1954 as Type 53D, | ||
was briefly renamed Type 53D/54D in 1955 with the introduction | was briefly renamed Type 53D/54D in 1955 with the introduction | ||
of the [[541]] and [[545], then quickly renamed Type 53/54D, | of the [[541]] and [[545]], then quickly renamed Type 53/54D, | ||
then shortened to Type D in 1959 with the introduction of | then shortened to Type D in 1959 with the introduction of | ||
the 5xxA scopes. Its last year was 1968. | the 5xxA scopes. Its last year was 1968. | ||
Some production used a pair of 5814 tubes at the input while others used 12AU7's. | Some production used a pair of [[5814]] tubes at the input while others used [[12AU7]]'s. | ||
These two tube types have different heater currents, and because the heaters are | These two tube types have different heater currents, and because the heaters are | ||
series-wired, you cannot switch from one type to the other without circuit modification. | series-wired, you cannot switch from one type to the other without circuit modification. | ||
Revision as of 20:53, 23 November 2010
The Tektronix Type D is a plug-in for 500-series scopes.
It has high gain, and the bandwidth depends on the gain, ranging from 2MHz at 50mV/div and up, to 300kHz at 1mV/div. It displays the difference between two input signals, with a common-mode rejection ratio of 10,000. It has six tubes, on a shock-mounted subchassis to avoid microphonics.
Type D was introduced with the 531 and 535 in 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, then shortened to Type D in 1959 with the introduction of the 5xxA scopes. Its last year was 1968.
Some production used a pair of 5814 tubes at the input while others used 12AU7's. These two tube types have different heater currents, and because the heaters are series-wired, you cannot switch from one type to the other without circuit modification.