Thanks. Right after I posted this, I went to Kadee and asked them. Sam-the-answer-man got right back to me. Kadee is now marketing a power supply for this purpose. It's also available from Mouser. I'll order one when we get back from skiing in January.
It takes an iron man to play with a toy iron horse.
Take a look at the below link from a Google search. You will probably find some usefull info there.
http://tinyurl.com/28bl2o3
Rich
If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.
Instructions say 3 amps @ 16 volts DC or 18 volts AC, http://www.kadee.com/html/309%20ins.pdf. I don't know if the lower amp requirement makes the search easier or more difficult.
A while back, I installed the first of my Kadee #309 electromagnetic uncouplers. At the time, I was having trouble finding a power supply for this. I did find one, but it turns out it's a little weird, and just doesn't seem suited to this job.
The unit wants about 4 amps at 16 volts, as I recall. Looking around, I can't seem to find anything in this range for a reasonable price. What have other people used? More important, where did you get it? Thanks.