The recordograph

[Aerodyne]

I did one come across some information that implied the use of film stock for radio programme recording. Radio Luxembourg was said to use such a method in the late 1940s. I assumede at the time that the film was used to record in the optical manner, the main advantage to a broadcasting station being the long time period available for recording when compared to the usual disk method. It might be that the recordpgraph was the system used, however. I wonder what happened to it?
Good thread, this!
-Tony