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Vintage dave (talk | contribs) (157-0099-00 selection procedure exceeds tube max ratings!) |
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[[File:Nuvistor 8056.jpg |thumb|350px|right|Nuvistor 8056]] | [[File:Nuvistor 8056.jpg |thumb|350px|right|Nuvistor 8056]] | ||
{{Vacuum Tube | |||
|Type=Triode | |||
|Number=8056 | |||
|EuroNumber= | |||
|RussianNumber= | |||
|Part_nos=154-0417-00 | |||
|Description=low-voltage [[Nuvistor]] triode | |||
|Used_in=422;502;W;1S1;3A7;3S3;3T4;5T3;10A1; | |||
|Designers= | |||
}} with a 6.3 V heater. | |||
It is used in the [[422]], [[502]], early [[W]], [[1S1]], [[3A7]], early [[3S3]], [[3T4]], [[5T3]], and [[10A1]]. | It is used in the [[422]], [[502]], early [[W]], [[1S1]], [[3A7]], early [[3S3]], [[3T4]], [[5T3]], and [[10A1]]. | ||
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The 8056 has a maximum plate-to-cathode voltage of 50 V. | The 8056 has a maximum plate-to-cathode voltage of 50 V. | ||
Contrast this with another Nuvistor triode, the [[7586]], | Contrast this with another Nuvistor triode, the [[7586]], which has a maximum plate-to-cathode voltage of 110 V | ||
which has a maximum plate-to-cathode voltage of 110 V | (however, one of the 8056 test conditions for 157-0099-00 puts 100 V on the plate.) | ||
( | |||
The 7586 and 8056 have the same pinout, | The 7586 and 8056 have the same pinout, but the two tubes are not interchangeable since they have different voltage ratings. | ||
but the two tubes are not | |||
since they have different voltage ratings. | |||
For example, in the front-end cathode followers | For example, in the front-end cathode followers of the [[3A1]], the plate voltage of the 7586 tubes, | ||
of the [[3A1]], the plate voltage of the 7586 tubes, V113 and V123, is 55 V, | V113 and V123, is 55 V, and possibly a bit higher during warm-up. | ||
and possibly a bit higher during warm-up. | This exceeds the maximum plate voltage of the 8056, unless the 3A1 is modified for lower front-end plate voltages. | ||
This exceeds the maximum plate voltage of the 8056, | |||
unless the 3A1 is modified for lower front-end plate voltages. | |||
{| class="wikitable" | {| class="wikitable" | ||
{{Checkedtubes TableHeader}} | {{Checkedtubes TableHeader}} | ||
| Line 28: | Line 32: | ||
{{Tube aging reference}} | {{Tube aging reference}} | ||
==Links== | ==Links== | ||
* [ | * [[Media:Rca 8056 datasheet.pdf|RCA 8056 Datasheet]] | ||
* [ | * [[Media:8056-siemens1964.pdf|Siemens 8056 Datasheet]] | ||
* [ | * [[Media:RCA Nuvistors.pdf|RCA Nuvistor Reference]] | ||
* [[tube:8056|8056 @ radiomuseum.org]] | * [[tube:8056|8056 @ radiomuseum.org]] | ||
{{Part usage}} | |||
[[Category:Triodes]] | [[Category:Triodes]] | ||
[[Category:Nuvistors]] | [[Category:Nuvistors]] | ||
Latest revision as of 07:13, 15 December 2023
The 8056 (P/N 154-0417-00) is a low-voltage Nuvistor triode vacuum tube with a 6.3 V heater.
It is used in the 422, 502, early W, 1S1, 3A7, early 3S3, 3T4, 5T3, and 10A1. It can sometimes be replaced with a MPF102 FET.
The 8056 has a maximum plate-to-cathode voltage of 50 V. Contrast this with another Nuvistor triode, the 7586, which has a maximum plate-to-cathode voltage of 110 V (however, one of the 8056 test conditions for 157-0099-00 puts 100 V on the plate.)
The 7586 and 8056 have the same pinout, but the two tubes are not interchangeable since they have different voltage ratings.
For example, in the front-end cathode followers of the 3A1, the plate voltage of the 7586 tubes, V113 and V123, is 55 V, and possibly a bit higher during warm-up. This exceeds the maximum plate voltage of the 8056, unless the 3A1 is modified for lower front-end plate voltages.
| Aged/Checked/Matched Pair Details | ||
|---|---|---|
| Used in | Tek Part# | S/N Range |
| 502, W, 3A7, 10A1 | 157-0099-00 | All |
Reference:
Links
Some instruments using part 8056
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| 10A1 | Tektronix | Plug-in | 10A1 | Differential amplifier plug-in | 1965 |
| 1S1 | Tektronix | Plug-in | 1S1 | 1 GHz sampling system | 1965 |
| 3A7 | Tektronix | Plug-in | 3A7 | Differential amplifier plug-in | 1965 |
| 3S3 | Tektronix | Plug-in | 3S3 | Dual-trace sampling plug-in | 1963 |
| 3T4 | Tektronix | Plug-in | 3T4 | Programmable sampling sweep plug-in | 1965 |
| 422 | Tektronix | Oscilloscope | 422 | 15 MHz portable dual-trace scope | 1965 |
| 502 | Tektronix | Oscilloscope | 502 | 1 MHz dual beam differential scope | 1958 |
| 5T3 | Tektronix | Plug-in | 5T3 | Timing plugin | 1965 |
| W | Tektronix | Plug-in | Type W | 8-23 MHz differential comparator | 1965 |