Actually using radio defeats the purpose which is to know where the corners of the yard are. since we can assume one has correctly working ears, they are a very fine means of detecting locations of appropriate sounds. So why replace the existing location devices with radio which isn't realy good at doing location particularly close in.
I'd now, that I've looked up the beeper box, bet it is simple enough to have the appropriate square wave output and will do fine. Tom Fowle
