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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 | ||