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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 | | ||
discontinued= | discontinued=1969 | | ||
series=[[500-series scopes]]| | series=[[500-series scopes]]| | ||
manuals= | manuals= | ||
* [http://w140.com/mmm/tek-d.pdf Tektronix Type D Manual (PDF)] | * [http://w140.com/mmm/tek-d.pdf Tektronix Type D Manual (PDF)] | ||
* [http://w140.com/tek_fcp/tek_type_d_factory_cal_proc.pdf Cal procedure] | <!-- * [http://w140.com/tek_fcp/tek_type_d_factory_cal_proc.pdf Cal procedure] --> | ||
* [http://bama.edebris.com/manuals/tek/d/ Type D manual @ BAMA] | * [http://bama.edebris.com/manuals/tek/d/ Type D manual @ BAMA] | ||
* [[Media:070-228.pdf|Tektronix Type D Manual (PDF, OCR, bad-OCR)]] | |||
* [[Media:tek_type_d_fcp.pdf|Tektronix Type D Factory Calibration Procedure (PDF, OCR)]] | |||
}} | }} | ||
The '''Tektronix Type D''' is a differential amplifier plug-in for [[500-series scopes]]. | The '''Tektronix Type D''' is a differential amplifier plug-in for [[500-series scopes]]. | ||
Type D was the most sensitive plug-in of the original four. | |||
ranging from 2 MHz at 50 mV/div | The bandwidth depends on the gain, ranging from 2 MHz at 50 mV/div to 300 kHz at 1 mV/div. | ||
There are two axes of sensitivity setting: a decade attenuator in front of a gain switch. | |||
This scheme would be reprised in Type [[W]]. | |||
It displays the difference between two input signals, | It displays the difference between two input signals, with a common-mode rejection ratio of 10,000. It has | ||
with a common-mode rejection ratio of 10,000. It has | six tubes, on a shock-mounted subchassis to avoid microphonics. | ||
six tubes, on a shock-mounted subchassis to avoid | |||
microphonics. | |||
Type D was | Along with Types [[A]], [[B]], and [[C]], Type D was introduced with the [[531]] and [[535]] in [[introduced in 1954|1954]]. | ||
[[introduced in 1954|1954]] | |||
was briefly renamed | At the time it was called Type 53D. | ||
of the [[541]] and [[545]] | It was briefly renamed 53D/54D in 1955 with the introduction of the [[541]] and [[545]]. This quickly changed to 53/54D, and finally shortened to just "D" in 1959 with the introduction of the 5xxA scopes. | ||
Its final year in the catalog was 1968; it had been superseded by Type [[W]] and then [[1A6]]. | |||
the 5xxA scopes. | |||
[[K]], [[L]], and [[T]] are tied for longest production life, at 16 years. | |||
[[B]], [[D]], and [[G]] are next at 15 years. | |||
[[Lavoie Laboratories]] produced an unauthorized clone, the [[Lavoie LA-265-D]]. | [[Lavoie Laboratories]] produced an unauthorized clone, the [[Lavoie LA-265-D]]. | ||
==Internals== | ==Internals== | ||
Early production used a pair of [[5814]] tubes at the input while late 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. | ||
Line 44: | Line 48: | ||
<gallery> | <gallery> | ||
D.jpeg | |||
D 1.JPG|Front | |||
D 1.JPG.JPG| Chassis | |||
D 3.JPG| Rubber support for elimination of microphonics | |||
D 4.JPG| Chassis bottom | |||
Tek d early schem.png|Early Schematic | |||
Tek d late schem.png|Late Schematic | |||
Tek d late attenuators.png|Late Attenuators | |||
Tek type d front.jpg|Front View (vertical position knob not original) | |||
</gallery> | </gallery> | ||
[[Category:500 series plugins]] | [[Category:500 series plugins]] | ||
[[Category:Differential amplifiers]] | [[Category:Differential amplifiers]] |
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