When I first started using X10, I installed a signal bridge and everything seemed to work okay, but as I installed more devices, I started to have intermittent problems. And, as time passed the problems happened more frequently.

I installed an amplified bridge two weeks ago and everything now works in a reliable manner - or at least as reliable as I expect X-10 to work - this is not a mission critical signaling system - you wouldn't want it to be part of the space shuttle, but it is far more reliable than any computer that I have owned in the past 15 years and I am pleased with it.

Btw, as each X-10 receiver 'sees' the signal, I wonder if an increase in the number of receivers might increase the likelihood that amplification might be needed.

Cheers, Jim.