Among the odds and ends I have collected over the past 77 or so years (I have been collecting "stuff" since I was 12) is a Western Electric Co. VT-5 (D80039) VACUUM TUBE. New in its original box, wrapped in a kind of felt-ish padding and a piece of paper with a diagram. It has a four-pin socket of a sort I have never before seen. Voltages shown are 22.5, 45, 67.5 and 90. The end of the box says U.S. Army VT-5, Signal Corps, ser no 6387 There are patent dates on the box from 12-17-18 through 6-12-25
About 2 1/2" long and 5/8 inches in diameter.
If you dig deeply enough on the web you can find a description of this tube.
Anyone interested?
- Gordon Eliot White