D: Difference between revisions
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title=Tektronix D| | title=Tektronix D| | ||
summary=Differential amplifier| | summary=Differential amplifier| | ||
image= | image=Tek type d front.jpg | | ||
caption=D front view| | caption=D front view| | ||
introduced=1954 | | introduced=1954 | | ||
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==Internals== | ==Internals== | ||
Some production used a pair of [[5814]] tubes at the input while others used [[12AU7]]'s. | Some production runs 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. | ||
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<gallery> | <gallery> | ||
File:D.jpeg | |||
File:D 1.JPG|Front | |||
File:D 1.JPG.JPG| Chassis | |||
File:D 3.JPG| Rubber support for elimination of microphonics | |||
File:D 4.JPG| Chassis bottom | |||
File:Tek d early schem.png|Early Schematic | File:Tek d early schem.png|Early Schematic | ||
File:Tek d late schem.png|Late Schematic | File:Tek d late schem.png|Late Schematic | ||
Revision as of 01:35, 10 December 2015
The Tektronix Type D is a differential amplifier plug-in for 500-series scopes.
It has high gain, and the bandwidth depends on the gain, ranging from 2 MHz at 50 mV/div and up, to 300 kHz at 1 mV/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.
Lavoie Laboratories produced an unauthorized clone, the Lavoie LA-265-D.
Internals
Some production runs 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.
Specifications
please add
Pictures
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Front
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Chassis
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Rubber support for elimination of microphonics
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Chassis bottom
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Early Schematic
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Late Schematic
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Late Attenuators
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Front View (vertical position knob not original)
