This is a medium-mu twin triode in a glass envelope with an eight-pin octal base. This is a spare tube for Bus Drive Flip-flop Storage Rack serial # 11.
Date
ca. 1957
Manufacturer
RCA
Place Manufactured
U. S.
Identifying Numbers
Model number
6SN7GTB
Printed in silver ink around the glass envelope.
Other number
N18884
Stamped in green ink near the bottom of the glass envelope.
Other number
ODC V18-2
Handwritten vertically in green ink on the glass envelope.
