Who is the largest supplier of electronic tube to the US currently?

Question

Who is the largest supplier of electronic tube to the US currently?

Answer 1

The big suppliers in the old days, Sylvania, GE, RCA shut down their plants years ago.

Last I heard, 15 years ago, Tungsram in eastern Europe were supposed to be the only ones still manufacturing. I have no idea if any are even made anymore. Most guys on the internet appear to be reselling tubes (many in new condition in original boxes) made years ago.

Answer 2

There are still big klystrons being produced, possibly by Varian.  I believe Eimac split from Varian and still produces power tubes.

These would probably be the largest manufactures in Dollar Volume.  That is because these tubes go for thousands of dollars each.  For instance, the Varian EIMAC X2242 tube produces 3 megawatts at 130 MHz.

If you include magnetrons then the manufactures of microwave oven tubes would probably be the largest.  That would be hard to tie down because parts that go into a magnetron tube probably come from all over the world.

Other manufactures are:

Electro-Harmonix  

Philips

Sylvania

GE

Mullard

Tung-Sol KT66

Etc.  See Link