Thank you all.
Disturbing news nevertheless.
I suppose when you hear a sound at night in your bedroom you can s-l-o-w-l-y determine what it is!
A year ago when I first found out about x-10. I bought an x-10 starter kit that had a remote, a base unit and a lamp controller.
I knew better than to dim a transformer, but was not going to so I went ahead and plugged a Behringer 802 mini audio mixer into it and it worked, turning of and on (Silently I might add) for months. I finally got around to buying 3 more lamp controllers to turn off and on 3 more of the same type mixers. The mixer transformers blew out within one day. I only found out in hindsight that it was because of the slow fade turn on "feature" of
some of the lamp controllers.
So I bought some replacement transformers and 4 appliance controllers for those mixers. They go "CLACK" when you turn them on and off. This will be disturbing but it was what it was. Now in further hindsight it is clear that I can use old revision lamp controllers to control the mixer power and loose the "CLACK" too without the modifications to a appliance controller that is to silence them.
So it's back to the well again.
Sigh....
:Ron