Vintage Tested Strong Raytheon 25BQ6GT Sweep Vacuum Tube Black Plate

Vintage Tested Strong RCA 25BQ6GT Sweep Vacuum Tube

Raytheon NOS 25BQ6GT Vacuum Tube Tested

Pair Sylvania 25BQ6GT & 25BQ6GTB Tubes - NOS/NIB - Tested GOOD on Hickok 539B

RAYTHEON - NOS 6AY3B Electronic Tube - Tested STRONG

(1) Tested Strong Raytheon 25L6GT Tube Date Code 6-48 Raytheon 25L6 GT Tube

VACUUM TUBE ~ 25BQ6GTB / 25CU6 ~ RCA ~ NOS ~ 25BQ6GT B

(1) Tested Strong Raytheon 25L6GT Tube Date Code M-R Raytheon 25L6 GT Tube