FYI I think the cable from the RFX to aerial itself plays a part in the signal.
I originally had it just loose in a circle between the RFX and aerial and decided to tidy it up so it wasn't loose.
I then started to see dropouts to the far items so made it loose in a loop once again.
I think it is ...

My wireless pulse counter is Very low-power. It is also very versatile.

http://foogadgets.tictail.com/product/w ... se-counter