[Arran]

I guess I had the name wrong, FADA called it a Flash-O-Graph not a Tune-A-Light, but really it's the same principle, a neon tube with a rising or falling light column. It would be neat if the bulb was still good, it was one of the forerunners of a Magic Eye tube, Sparton had a similar device called a Visoglow tube but it's display and mounting was more similar to a Magic Eye, but with a four pin socket.
One thing I hate about the Radio Museeeeum site is you can't view the schematics without a membership, they treat them like they a state secret. It would make sense if they were large factory issued folders but most look like they are copied and uploaded from a Rider's or an RCC manual which is often just a single page. If I have a schematic for a Canadian made set, and someone down South needs it, I will typically scan it and email it to them, I'm not going to try making a profit off it because I don't really own anything other then a copy.
Regards
Arran