Kuba PAL PortaColor on E-Bay Germany

[Mikey405]

Well done Eckhard for rescuing that Kuba set. I kinda-like those sets. They always feel like they'll drop to bits at any minute when you pick them up and the picture always seems fuzzy on those low-definition tubes, but they do have a kind of charm about them.

Originally Posted by Robert Grant

It must be in there, but I don't see how the set "knows" which lines are R-Y, and which are Y-R.

Hi Robert. With 625 line PAL, each alternate line has a burst signal which "swings" +/- 45 degrees relative to the previous line. This "swinging burst" is then rectified to generate a 7.8KHz (half line frequency) square wave which then operates the PAL switch so that the R-Y synchronous demodulator recieves a reference signal in the "correct" phase relative to the signal.

Hope my dodgy explanation helps. Probably does more harm than good.

Kind regards.

From Mike.