RE: Making contact by FM radio
I don't know the answer to the minimum size question. Although experience shows that even powerful radios are smaller than show boxes. Not very big at all.
The antenna though is the biggest issue. To receive requires a bit of wire but to transmit requires a larger, usual a quarter or half of the wavelength which can be dozens of metres. This is not so easy to hide although it can be done.
Skean Dhude
-------------------------------
It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change. - Charles Darwin
|