It worked quite well with solid copper wire across concrete. Much appreciated. Thanks. I am now trying to see if there is a smaller length that could suffice for my experiments. Any thoughts on that? Is there a smaller wavelength wire that could suffice? Anway I will post in this forum the lengths that worked for me. Cheers!

petewill:
Do we need cat5? Will any cable do?
Also do i need to have this antenna at both the tx and rx? Thanks for your cool video! Will try it and report my observations. We've got concrete walls in India.. I am hoping the range is still alright