(2) Raytheon 6SN7GTB Tubes Black Plates O Getters. Tested on an Amplitrex AT1000.
Item Tag: 6SN7GTB
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NOS 6SN7 GTB Carbonized Black Plates Ring Getter Mullard Tooling, 1-gold Pin
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.