NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states “Individual tubes, like any manufactured product, may have characteristics that range above or below the values given.
Item Tag: 5V4G
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5V4 General Electric Rectifier Radio Vacuum Guitar Tube 115% NOS Balanced Strong
One NOS General Electric 5V4 G rectifier tube. Was tested on the Jackson model 103 Hickok style tester where the minimum good value is 25 and the average NOS value is 40. Tube type(s) Thru plate. Bottom large D getter.
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Matched Pair RCA 5V4G Rectifier Tubes Black Plates D Getters Tests Strong TV-7BU
Matched Pair RCA 5V4G Rectifier Tubes Black Plates D Getters. Tube 1 tests at 60/60 and tube 2 at 56/58 with 40 being the minimum score for a good tube (with 65% life remaining).