Antennæ for Wireless Telegraphy

Abstract

I WAS interested to see Mr. Campbell Swinton's letter on wireless receiving with his bedstead as an aërial. Many of the more powerful stations are, however, much easier to receive than is generally supposed; for instance, I have been able to read the Eiffel Tower nine o'clock news message with only 12 ft. of No. 18 S.W.G. copper wire stretched across my attic (second floor, about 25 ft. from the ground) using good earth to waterpipes, with usual tuning coils and condensers, bornite-zincite detector, and very sensitive 4000 ohm telephone (H. W. Sullivan), without any relay. Even when the aërial was reduced to 6 ft. of wire the signals were just audible, but very faint.