Background static to echoes from the moon
Heavy line noise on transatlantic circuit. (Static)
Static. (Continuous background)
Tuning a communications receiver on the medium-wave band
VHF receiver with aerial disconnected. (Unintelligible speech and heavy distortion)
Tuning VHF receiver
Severe mains hum and static
Radio interference from electric fence
Tuning small medium-wave receiver
Tuning communications receiver - medium wave band
VHF receiver with aerial disconnected. Speech, heavily distorted
Severe mains hum & static
Slow tuning across 9 Mhz, with static and heavy interference
Quick tuning across 49 metre band
Slow tuning across 31 metre band (Short Wave Communications Receiver)
Heavy line noise on Transatlantic circuit
Electronic interference
Radio interference
Short Wave radio interference
Short Wave radio interference
