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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 | For example, in the front-end cathode followers | ||
of the [[3A1]], the plate voltage of the 7586 tubes, V113 and V123, is 55 V, | 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. |