A world of radio listening on the longest of long-waves.
The first ever jingle heard on BBC Radio One, in those days medium-wave only on 247 metres.
If you tune a radio a long way below Long Wave, you come across the very strange world of Very Low Frequency radio.
A world of time signals, very slow data communications with submarines and where the effects of the weather produce strange signals.
Connect an antenna to your computer's microphone input and you can hear VLF radio signals.
Mechanical transmitter down on 17.2 kHz in Sweden.
Is there a place for Very Low Frequency technology these days?
