Nipkow disc television machine for 30 lines (1930 vintage replica). Made by Roger DUPOUY. Sold in March 2011.
Nipkow scanning disc 410 millimètres in diameter. One spiral of 30 holes; 1 millimeter in diameter.
Lighting source: Raytheon neon lamp.
Scanning disc driven by synchronous motor.
frame frequency: 12.5 images/sec. disc speed: 750 rpm.
Image ratio: 4/3. Sweeping from left to right, top to bottom.
Build partly with 1930 vintage components, this machine shows reddish coloured pictures