For your consideration is one Type-10 power triode vacuum tube with ceramic base. Tube features charcoal-black plates, dimpled-D-foil getter and ceramic base construction. Hickok 539B is a mutual conductance (Gm) type tube tester.
Item Tag: No brand name on tube !!!
Sylvania?? USA made Type-10 Ceramic Base Power Triode Tube(VT-25 VT-62 801A 210)
For your consideration is one Type-10 power triode vacuum tube with ceramic base. Tube features charcoal-black plates, dimpled-D-foil getter and ceramic base construction. Hickok 539B is a mutual conductance (Gm) type tube tester.