8056: Difference between revisions
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It can sometimes be replaced with a [[MPF102]] FET. | It can sometimes be replaced with a [[MPF102]] FET. | ||
The 8056 has a maximum plate-to-cathode voltage of | 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 | which has a maximum plate-to-cathode voltage of 110 V. | ||
The 7586 and 8056 have the same pinout, | The 7586 and 8056 have the same pinout, | ||
but the two tubes are not interchangable | but the two tubes are not interchangable | ||
since they have different voltage ratings. | 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, V113 and V123, is | of the [[3A1]], the plate voltage of the 7586 tubes, 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, | This exceeds the maximum plate voltage of the 8056, | ||
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* [http://w140.com/8056-siemens1964.pdf Siemens 8056 Datasheet (PDF)] | * [http://w140.com/8056-siemens1964.pdf Siemens 8056 Datasheet (PDF)] | ||
* [http://w140.com/RCA_Nuvistors.pdf RCA Nuvistor Reference (PDF)] | * [http://w140.com/RCA_Nuvistors.pdf RCA Nuvistor Reference (PDF)] | ||
* [https://www.radiomuseum.org/tubes/tube_8056.html 8056 | * [https://www.radiomuseum.org/tubes/tube_8056.html 8056 @ radiomuseum.org] | ||
[[Category:Triodes]] | [[Category:Triodes]] | ||
[[Category:Nuvistors]] | [[Category:Nuvistors]] | ||
Revision as of 04:25, 11 October 2018
The 8056 is a low-voltage Nuvistor triode with a 6.3 V heater.
It is used in the 10A1, 422 and the 5T3. 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.
The 7586 and 8056 have the same pinout, but the two tubes are not interchangable 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.