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De Forest "Audion" radio tube
Missile, Test, RTV-N-15, also Designated Pollux
Sylvania type 6SN7W double triode
Raytheon 6SN7GT double triode
Raytheon 6SN7W / 6SN7WGT double triode
RCA type 6SN7GT double triode
RCA type 6SN7GTB double triode
Admiralty Pattern 6SN7GT double triode
Globe Trotter 8 Transistor Radio
Heathkit Assembly Manual Vacuum Tube Voltmeter
Western Electric type VT2 radio tube
Western Electric type VT2 radio tube
Western Electric type VT2 radio tube
Western Electric type VT2 radio tube
Western Electric type VT2 radio tube
Western Electric type VT2 radio tube
Western Electric type VT2 radio tube
Western Electric type VT2 radio tube