6SF7 JAN METAL
Robust mil. spec. diode pentode tubes manufactured in the United States by General Electric. These metal 8 pin octal based tubes serve as combined IF amplifier, detector and AVC rectifier for radio receivers. They are printed in white with GE logo, JAN-CG-6SF7 MADE IN U.S.A. and coded 2-26 188-5. Boxes are standard military beige printed JAN CG 6SF7 GENERAL ELECTRIC CO. ACC 4/52 indicating 1952 production.