This record consists of 8 tubes. The 6136 is a sharp-cutoff pentode in a miniature seven-pin glass envelope. Each object has a small yellow and a small blue dab of paint on top of the glass envelope near the tip. Each tube has a set of numbers printed vertically in two rows in white ink: two objects are marked with '56-22 188-5'; three are marked '56-26 188-5'; and two are marked '57-17 188-4.' The marking is illegible on one.
Manufacturer
General Electric
Place Manufactured
U. S.
Identifying Numbers
Model number
6136
Printed in silver ink, and also in white ink, around the glass envelope.
