Nuvistor: Difference between revisions
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As high-impedance buffers (cathode follower), Nuvistors were replaced by JFETs. | As high-impedance buffers (cathode follower), Nuvistors were replaced by JFETs. | ||
As voltage amplifiers, they were mostly replaced by BJTs. | As voltage amplifiers, they were mostly replaced by BJTs. | ||
Some products such as the [[1A1]] and [[453]] started production | Some products such as the [[1A1]] and [[453]] started production with Nuvistors and then later switched to transistors. | ||
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. | ||
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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== | ==Links== | ||
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Nuvistor_7587.jpg | 7587 Nuvistor | Nuvistor_7587.jpg | 7587 Nuvistor | ||
</gallery> | </gallery> | ||
{{#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 | |||
}} | |||
[[Category:Vacuum tubes]] | [[Category:Vacuum tubes]] | ||
[[Category:Repair issues]] | [[Category:Repair issues]] | ||
Revision as of 16:22, 10 October 2021
Nuvistors are miniature, rugged, metal-ceramic enclosed vacuum tubes. There are used in many Tektronix products of the 1960's. Nuvistors used in Tek gear include:
- 6CW4 (in 1A7, 3B2, 3A8)
- 7586 (in 1A1, 1A2, 1A5, 11B1, 321, 3A1, 3A3, 3A8, 3A74, 3S76, 4S1, 6R1A, 82, 86, and M)
- 7587 (in 184)
- 7895 (in 3B1, 3B3)
- 8056 (in 422, 502, early W, 1S1, 3A7, early 3S3, 3T4, 5T3, and 10A1)
- 8393 (in 1A7, 453 and 503)
As high-impedance buffers (cathode follower), Nuvistors were replaced by JFETs. 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. 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. 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.
Links
-
Several nuvistors
-
Dimensional drawing (6CW4)
-
7587 Nuvistor
| Page | Class | Manufacturer | Model | Part nos | Description | Used in | Designers |
|---|---|---|---|---|---|---|---|
| 6CW4 | Vacuum Tube (Triode) | 6CW4 | 154-0323-00 | Nuvistor triode | 1A7 • 3A8 • 3B2 • 3S76 • 6R1 • 565 • S-311 | ||
| 7586 | Vacuum Tube (Triode) | 7586 | 154-0306-00 | Nuvistor triode | M • 1A1 • 1A2 • 1A5 • 10A2 • 10A2A • 11B1 • 11B2A • 321 • 321A • 3A1 • 3A1S • 3A3 • 3A5 • 3A6 • 3A7 • 3A8 • 3A74 • 3S76 • 3T77 • 3T77A • 3B5 • 4S1 • 4S2 • 6R1 • 6R1A • 9A1 • 9A2 • 82 • 86 • S-311 | ||
| 7587 | Vacuum Tube (Tetrode) | 7587 | 154-0465-00 | sharp-cutoff Nuvistor tetrode | 184 | ||
| 7895 | Vacuum Tube (Triode) | 7895 | 154-0378-00 | Nuvistor Triode | 3B1 • 3B1S • 3B3 | ||
| 8056 | Vacuum Tube (Triode) | 8056 | 154-0417-00 | low-voltage Nuvistor triode | 422 • 502 • W • 1S1 • 3A7 • 3S3 • 3T4 • 5T3 • 10A1 | ||
| 8393 | Vacuum Tube (Triode) | 8393 | 154-0461-00 | Nuvistor triode | 453 • 454 • 1A6 • 1A7 • 503 |