a little help with capacitive power supply values

[dhouston]

To learn the secrets of it’s communication wave form, if you will.

Simpler and safer is to use a stepdown transformer connected to the powerline and view the communication wave form through it. You don't even have to open the X-10 modules. A high pass filter passes 120kHz and blocks the 60Hz.

[Dennis]

Yes agreed or use a lower AC voltage at the same frequency running completely off the mains ?

Dennis