Update: I gathered up your suggestions; Planning to work on them today.

Then, a friend reminded me that I have a box of X-10 stuff from one of my house-moves... He was correct.

In the box I found two Power-house RR501 transceivers. I decided to eliminate/isolate. I hope I did not over-simplify this...

I plugged the RR501 and the TM51 into an outlet in my garage.

Bottom-line… Neither unit would activate after moving 10-feet from them. It seems to me the common-denominator is the KR19A transmitter? Checked the new battery again…Fully charged.

The HR12A PalmPad Remote Control is a bit large/clumsy. Are there any other transmitters other than the HR12A and the KR19A?