On Sun, 1 Jan 2012 12:57:50 EST, Steve Bonine wrote:

So where in the US are these manufactured?

Varian still sells them - their plant was in Utah the last time I
looked. These are "jugs" the size of wastebaskets with prices to
match. There are two tube rebuilders in California who serve the
broadcast transmitters world-wide as well. I also suspect that
klystrons, TWTs, and magnetrons are in that mix, but 6SN7-s are not.
--

73 de K2ASP - Phil Kane

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon

e-mail: k2asp [at] arrl [dot] net