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

Vintage Tested Strong Raytheon 25BQ6GT Sweep Vacuum Tube Black Plate

NOS Vintage Vacuum Tube NIB Raytheon 25BQ6 25BQ6GT New In Box MADE IN USA

Vintage Tested Strong RCA 25BQ6GT Sweep Vacuum Tube

RAYTHEON - NOS 6AY3B Electronic Tube - Tested STRONG

RAYTHEON - NOS 16AQ3 Electronic Tube - Tested STRONG

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

DUMONT - NOS 6B10 Electronic Tube - Tested STRONG