by DrZarkov » Wed Oct 15, 2008 3:24 pm
I've never heard of a surviving TeKaDe mirrorscrew receiver, or a real replica. Maybe we should ask TeKaDe (it became later ITT, now I think it's a part of GE). The problem was, that in Germany the systems changed very fast between 1929 and 1937, when finally 441 lines became standard. I guess that a receiver for let's say 90 lines was disassembled when it became obsolete. Even in 1935, when the Nazis declared the 180 lines system the first "high definition" television system in the world, they changed it shortly after that in 180 lines with interlace (which was possible with a mirrorscrew, you just had to change the mirrorscrew), and only 2 years later to 441 lines. TeKaDe made both, TVs with CRT and mirrorscrew. I know that some early CRT-TVs survived at the post-museum in Nuremberg you can see one. So I wonder how many mirrorscrews were really made.