1 National Union 6F8-G Vacuum Tube 1940’s Vintage Black Plate Audio Twin Triode
Hickok TV-7D/U test reads 90/94. 1 National Union 6F8-GVacuum Tube.
1 NOS GE 6F8-G Vacuum Tube – 1943 Vintage Black Plate Audio Twin Triode
1 NOS GE 6F8-GVacuum Tube. Hickok TV-7D/U test reads 118/120.
