"Garrett Wollman" wrote in message
...
In article ,
t.hoehler wrote:
I wonder if there are any 50KW AM vacuum tube transmitters in use
anymore?

They are certainly dwindling. I've visited a few sites that still
have Continental 317s active, but for the most part these transmitters
are being retired rather rapidly now, in favor of new Harris and
Nautel solid-state units.

But aren't there still a lot of tube 50s in backup role? A couple of years
ago WTOP still had a tube rig as backup.