Color subcarrier visible in retrace on early TVs

[Gleb]

Originally Posted by NoPegs

You may have to fiddle with the DVD player menus a bit to get it to run non-progressive video out of the component outputs. If you set it to 480P it'll look like your vertical sync is off by 2x.

I need 576i (625/50).

I'm interested in a more general solution like some kind of filter or blanking pulse shaper. It seems like the days of analog broadcasting are numbered, and the problem may reappear with digital TV receivers. Who knows how they will decide to f..ck up that blanking intervals in the future...

I've aldeady messed with visibility of teletext signals in vertical retrace. I developed a retrace blanking circuit and installed some sort of it in each antique TV. It's just a simple differentiating circuit which forms rectangular pulses from the vertical sawtooth fall and injects them into the brightness control. Of course, I made it out of vintage components so they are almost invisible in the original circuits.