19/4/20 (tonight) 10pm BBC4

[Panrock]

My memory may be playing tricks but I really thought they ended up doing a 60-line demonstration, not 120. How was their Nipkow disc produced? An accurate 120-line disc would have been quite an achievement, even today. The only demonstration I have seen was of the one made by the late Peter Yanczer and understandably the pictures were blurry.

Steve