Vacuum tube type 6SN7GTB
||Printed in silver ink around the glass envelope.
overall: 3 in x 1 1/4 in x 1 1/4 in
This is a medium-mu twin triode in a glass envelope with an eight-pin octal base. This is a spare tube for Bus Driver Flip-Flop Storage Rack S/N 6.
Gift of the Digital Equipment Corporation