I'm looking for any info on the Bauer FB-5000J 5kW AM
transmitter...specifically, how big/heavy it is, tube replacement and
reliability, and AC power requirements. If anyone has any pictures of
it, that would be helpful too.

Now you're talking:

http://www.bauertx.com/used.htm

The factory still supports all their models.

A 5Kw is for sale in the above link together with showing the tube
lineup.

Nice box.

Not as nice as my Nautel:-)
--
Philip de Cadenet
Transmitters 'R' Us
http://www.transmittersrus.com