16-11-2023, 12:33 PM
Getting larger screens was a big challenge in the early days and even in the not so early days. In the late 1940s the limit for a direct view CRT was about 15". The ultimate limit turned out to be 37", a truly monstrous telly that wouldn't fit through many doorways.
Metal cone CRTs were an attempt to reduce weight and cost. Apparently they were almost implosion-safe, like rimband CRTs. But they had too many problems and were a dead end.
Projection CRTs were a possible solution for midsize domestic TVs. Despite various attempts, including this RCA set, they were never very popular. Projection CRTs were pushed to the utmost limits for cinema systems, with EHT approaching 100kV, liquid cooling and lots of lovely Xrays.
The complete madness of Eidophor. The equally mad Jumbotron.
Now we have DLP projectors in all sorts of sizes. They work rather well.
Metal cone CRTs were an attempt to reduce weight and cost. Apparently they were almost implosion-safe, like rimband CRTs. But they had too many problems and were a dead end.
Projection CRTs were a possible solution for midsize domestic TVs. Despite various attempts, including this RCA set, they were never very popular. Projection CRTs were pushed to the utmost limits for cinema systems, with EHT approaching 100kV, liquid cooling and lots of lovely Xrays.
The complete madness of Eidophor. The equally mad Jumbotron.
Now we have DLP projectors in all sorts of sizes. They work rather well.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
