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series=500-series scopes | | series=500-series scopes | | ||
manuals= | manuals= | ||
* [[Media:070-228.pdf|Tektronix Type D Manual]] (PDF, OCR, bad-OCR) | |||
* [[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)]] | * [[Media:tek_type_d_fcp.pdf|Tektronix Type D Factory Calibration Procedure (PDF, OCR)]] | ||
* [[Media:Tek type d cal outline.pdf|Tektronix Type D Calibration Outline (PDF, OCR)]] | * [[Media:Tek type d cal outline.pdf|Tektronix Type D Calibration Outline (PDF, OCR)]] | ||
<!-- * [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] --> | |||
}} | }} | ||
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]]. | ||
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This scheme would be reprised in Type [[W]]. | This scheme would be reprised in Type [[W]]. | ||
It displays the difference between two input signals, with a common-mode rejection ratio of 10,000. It has | It displays the difference between two input signals, with a common-mode rejection ratio of 10,000. | ||
six tubes, on a shock-mounted subchassis to avoid microphonics. | It has six tubes, on a shock-mounted subchassis to avoid microphonics. | ||
Along with Types [[A]], [[B]], and [[C]], Type D was introduced with the [[531]] and [[535]] in [[introduced in 1954|1954]]. | Along with Types [[A]], [[B]], and [[C]], Type D was introduced with the [[531]] and [[535]] in [[introduced in 1954|1954]]. | ||
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==Internals== | ==Internals== | ||
Instruments below serial number 3462 used a pair of [[5814]] tubes at the input; later production used [[12AU7]]'s. | Instruments below serial number 3462 used a pair of [[5814]] tubes at the input; later production 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. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||