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Nuvistor: Difference between revisions
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[[File:Nuvistor.jpg|thumb|right|250px|Nuvistor]][[File:Nuvistor bottom.jpg | thumb|right|250px]] | |||
'''Nuvistors''' are miniature, rugged, metal-ceramic enclosed vacuum tubes introduced by [[RCA]] in 1959 (first being the [[7586]]). They are used in many Tektronix products of the 1960s. | |||
As high-impedance buffers (cathode follower), | As high-impedance buffers (cathode follower), Nuvistors were replaced by JFETs. As voltage amplifiers, they were mostly replaced by BJTs. | ||
Nuvistors were replaced by JFETs. | Some products such as the [[1A1]] and [[453]] started production with Nuvistors and then later switched to transistors. | ||
As voltage amplifiers, they were mostly replaced by BJTs. | |||
Some products such as the [[1A1]] and [[453]] started production | |||
with Nuvistors and then later switched to transistors. | |||
Nuvistors, like all tubes, eventually need to be replaced. | Nuvistors, like all tubes, eventually need to be replaced. | ||
They are no longer manufactured but they are still | They are no longer manufactured but they are still available online from old stock. | ||
Another repair option is to convert the circuit to use a transistor. | Another repair option is to convert the circuit to use a transistor. | ||
In at least one case (the [[422]]), JFETs can be plugged directly | In at least one case (the [[422]]), JFETs can be plugged directly into the Nuvistor sockets with no further circuit modification, and proper function of the scope is restored. | ||
into the Nuvistor sockets with no further circuit modification, and | |||
proper function of the scope is restored. | ==Links== | ||
* [http://w140.com/RCA_Nuvistors.pdf RCA Nuvistor Reference (PDF)] | * [http://w140.com/RCA_Nuvistors.pdf RCA Nuvistor Reference (PDF)] | ||
* [http://www.r-type.org/articles/art-150.htm Detailed article on Nuvistors] | |||
==Pictures== | |||
<gallery> | |||
Assorted nuvistors.jpg | Several nuvistors | |||
6CW4-dimensions.jpg | Dimensional drawing ([[6CW4]]) | |||
Nuvistor_7587.jpg | 7587 Nuvistor | |||
</gallery> | |||
'''Nuvistors used in Tek gear include:''' | |||
<small> | |||
{{#cargo_query: | |||
tables=Components | |||
|fields=_pageName=Page,Class=Class,Manufacturer=Manufacturer,Model=Model,Part_nos__full=Part nos,Description=Description,Used_in__full=Used in,Designers__full=Designers | |||
|where=Class like 'Vacuum%' and Description like '%Nuvistor%' | |||
|order by=_pageName ASC, Class ASC, Manufacturer ASC, Model ASC, Part_nos__full ASC | |||
|limit=1000 | |||
|offset=0 | |||
}} | |||
</small> | |||
[[Category:Nuvistors]] | |||
[[Category:Repair issues]] | |||