Artifact Details Title Vacuum tube type 4JC6A Catalog Number 102731118 Type Physical object Description These are two vacuum tubes, type 4JC6, manufactured by Radio Corportion of America (RCA) with 9 connector pins. Sharp cut-off pentode, 4.5volts required voltage. Manufacturer Radio Corporation of America (RCA) Place Manufactured Japan Identifying Numbers Model number 4JC6A Stamped on tube in gray. Other number A-23 Stamped on tube in gray. Other number WXY Stamped on side in gray. Dimensions overall: 2 in x 3/4 in Category Component/vacuum tube