The requirements for receivers at SLF frequencies is less stringent than transmitters, because the signal strength ( set by atmospheric noise ) is far above the noise floor of the receiver, so small, inefficient antennas can be used.
22.
The low bandwidth of the code signal, due in part to low information transmission rate, allowed very selective filters to be used in the receiver which blocked out much of the atmospheric noise that would otherwise reduce the intelligibility of the signal.
23.
There was no independent confirmation of the reported reception, and the transmissions were difficult to distinguish from atmospheric noise . ( A detailed technical review of Marconi's early transatlantic work appears in John S . Belrose's work of 1995 . ) The Poldhu transmitter was a two-stage circuit.
24.
In October 2011, Gilbert's short story " Sliding Off the World ", first released as a spoken-word piece set to atmospheric noise on the CD " Touch 25 " in June 2006, was published in the anthology " Murmurations " by Nicholas Royle ( Two Ravens Press, ISBN 978-1-906120-59-7 ).
