When I worked at a music school I built a system to record the various concerts and events that happened in the recital hall.

It consisted of a mac mini connected to a usb audio interface, running Audio Hijack. This is a simple piece of software that can be programmed like a VCR to make scheduled recordings and save them in a folder. A piece of Applescript then synced this local folder with another on a server, creating an archive of all the school’s concerts that anyone could access.

The computer lived in a locked cupboard and could be accessed via Apple Remote Desktop when I needed to set up new scheduled recordings. Tie lines to and from the cupboard to the studio meant that anything could be routed to the recorder (though it was by default normalled to a stereo mic installed in the ceiling of the recital hall), and the output from the audio interface could be monitored through the desk in the studio. Maybe a similar kind of setup would work for a radio station? An old PC set to make low-quality MP3 recordings through the line-in whenever the station is on-air? If you had time, you could even schedule the recordings on a show-by-show basis and in better quality to create a usable archive of all the programmes that are broadcast (so DJs can keep a copy of their show if they did a good mix etc).

Just had a quick look for a PC equivalent and Total Recorder seems to do the same thing.

Free Audio Recorder is an easy to use free software that enables you to easily record any sound you can hear on your computer, from internet radio stations to streaming music. You can set the recording audio quality, from a low quality taking minimal disk space, up to CD quality. For more information Radio ads and Radio commercials

You can record online radio from any popular sites with the aid of a simple yet powerful Windows screen recorder, like Joyoshare Screen Recorder. It gives me nice user experience. I can skip unwanted sections and cut recordings to different portions with a wide range formats and devices supported.