This listing is for a vintage RCA type 5T4 full-wave rectifier vacuum tube.

This tube appears to be NOS (New Old Stock) and the box is marked as such, but I don't know for sure.

At any rate, this tube tested great on a reliable Hickock 800A tube tester. 

The sections tested at 2200/2150 on a scale of 0-3000, where 1500 or more is "GOOD".   ...and NO shorts or gas detected.

Ref:  New tubes will typically only test in the 2000-2300/2000-2300 range on this tester.   This tube has almost perfectly matched sections!

Satisfaction guaranteed!   --   $-$-$  --  Check out all the other items I have for $ale!   --  $-$-$

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