Teletext - Teefax
If anyone is running a teletext TV or a vintage external decoder and a Raspberry Pi you can have something to decode with Teefax. Some software called Vbit 2 generates a teletext signal on the PAL output of the Pi which can be decoded by a suitable receiver. It would be interesting to see if the Tifax XM11 could decode it, I remember that type of decoder stopped working when fastext was introduced.
There are a couple of off screen shots, taken on a plasma TV as I don't have anything old with teletext, there is a facebook group which contributes pages so there is plenty to look at, even Bamboozle if you have a decoder with fastext.
Here is a link to the site with the code;
I don't really understand the code but I was able to follow the instructions to make it work.