8056: Difference between revisions
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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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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}} | ||
Revision as of 14:31, 10 October 2021
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: