Origins of the 405 line system.

[Geordie McBoyne]

Actually it wasn't a French television system but in fact it was the apparatus was installed by the Germans during the occupation of Paris. Original pre-war French transmitter, 30KWatts, the most powerful television transmitter in Europe. AP was 17Kwatts. 405 lines frame blanking period is 1.4milliseconds and my calcs come out with 2.26milliseconds for 441 lines.

Geordie McBoyne.