In article , Garrett Wollman wrote:

They are certainly dwindling. I've visited a few sites that still
have Continental 317s active, but for the most part these transmitters

Especially since the older tube transmitters won't work well with IBOC
according to articles I've read in BE Radio magazine. You really need a
solid-state transmitter.

--
Sven Weil
New York City, U.S.A.