John, After you posted the schematic for Dale's test rig for TMCC signal strength, I performed the test. My three TMCC bases all check OK {one from the home layout, one from the layout in the Catskills, one spare}. My Legacy base shows Zero 455KHz signal. The shipping label was emailed to me the day after I talked on the phone with the service person, just as promised. I will send it to Lionel for repair.
Regards, Paul