6146W JAN RCA Vacuum Tube (aka 7212), Hickok Tested

This is an RCA tube, a 6146W. 

The W means it is the rugged version of a 6146.  It's also the same as a 7212. 

It's a JAN tube, which means Joint Army Navy.  JAN tubes are known for their ability to stand up to harsher than usual treatment.

Tested on Hickok 533A, Gm recorded on side of the tube box.

Photos are of one example of this tube, it may or may not be the exact one you receive.

• Black plates. 
• Made in USA.
• Ships quickly and safely from Mississippi.