Radio 4's last AM broadcast in 1978
Episode 999, Mar 13, 2015, 11:55 PM
In November 1978, frequencies on many stations changed to avoid night-time interference. The UK's medium wave (AM) frequencies moved to 9 kHz spacing. Many BBC stations shifted around at the same time, meaning Radio 4 moving to its now familiar Long Wave frequency from Medium Wave. Here, enjoy its crackly medium wave farewell from David Symonds