Wendy, just seen your bit about the first telly your dad built (been away for a few days) which is almost exactly what I remember of my dad's efforts from a bit earlier perhaps. I think it was 1948 but it might even have been 1947. After having a lush time in Bournemouth in RAF uniform, playing in bands and concerts for two years or so, he was noticed, and sent off to become a radio instructor before going out to India to help in equipping an RAF base near Karachi.
After he was demobbed he had become a bit of a tv ham. and he used to use a VCR 97 tube, green as you say, but only 4 inches diameter on the front end and about eighteen inches from front to back. He said the tube was used by the RAF for bomb aiming, but he may have been having us on. I can remember proudly going to an Army surplus dealer in Dale End in 1949 or early 1950 (while I was still at school) to buy a replacement tube for Fifteen Shillings,
He was picking up test signals from Alexandra Palace in London, before the transmitter near Blake Street started, I think, in 1948 or 1949, and neighbours would come round to look at this tiny picture about two inches by three, white on green. The "set" was in three parts - the power pack with a massive transformer, the receiver with lots of valves and tuning condensers, and the amplifier. On top of that was this tapering tube, four inches across at its wide end. To start with he mounted it on a three-tier tea trolley with castors. Everything was quite exposed and we were all warned not to touch anything. The result could have been serious.
After a bit he made a 'cabinet' which had a three-tier wooden frame to support the three chassis, but was then enclosed with 1/8 inch hardboard. What amused me was that he covered the all the corners with gummed paper parcel tape and then painted the whole 'cabinet' walnut brown with brush graining. The deception didn't really work, as the oil paint lifted the gummed paper tape off most of the hardboard.
But it did work and we used to see Muffin the Mule, Sylvia Peters, and lots of horse racing I remember. The programmes were very amateurish at first, but I think by the time of the Coronation in 1953 they had become a bit slicker. Not that I saw much tv in those days as I was more interested in getting out and about, not to mention courting.
Peter