6146W Raytheon Vacuum Tube (aka 7212), Hickok Tested

This is an Raytheon tube, a 6146W. 

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

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. 
• Dual halo getters
• Made in USA.
• Ships quickly and safely from Mississippi.