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Originally Posted by marcel
Hello, It is for me the first time to that I on these forum a bulletin writes. My English is unfortunately not best.
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Don't worry! My English was very bad when I start to write English emails. But the efforts are worthwhile. There are many fantastic people all around the world which share our interests.And errors in the English writings will not be punished here
(I hope so?!)
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Originally Posted by John Folsom
? No shunt regulator in the K4? How did they get away with that?
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The high voltage is regulated by a reference impulse from the flyback transformer which is given on the grid of the triode of PCF80 (Rö 302T). I don't know whether picture width might react to changing in the beam currents. But I have a similar function in my Saba color (without shunt regulator) which is operating well.
BTW: The majority of these tv sets went to Canada. I think it must be easier to obtain such a set on the American continent than in Europe.