A Pair of NOS RCA5691 / 6SL7GT made for and labeled Westinghouse.

This auction is for a pair, you get both tubes.

These tubes were made for the military and utilize lowgrid current and balanced sections. They met Special test requirements forshock, vibration fatigue, extended life, stabilization, and heater cycle.These tubes were designed and specified for the Mercury Redstone RocketProgram.

These tubes are marked with a star signifying the specialquality of these tubes. They have a short glass envelope. Nice yellowscreening. Clean Straight pins. The boxes are a little rough.

These tubes were tested properly on our calibrated TV-7D/U.

Where minimum = 32

Tube 1 Triode 1 =69 Triode 2=64

Tube 2 Triode 1 = 60 Triode 2=70

No Gas or shorts.

Your Tubes will be packed and shipped Properly!