Ramiros, thank You very much for Your fast and kind help!

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...if possible connect the console to the low-frequency input.
If I think well, does it mean that I need an old tv? You know, I have another old console, a Conic TVG-101 (Made in 1977). That machine works, but I can't fix the screen on my tv. The screen jumps vertically very fast. So I decided to buy a contemporary tv (a Junoszty, or a hungarian made) to test these old games, because I'm not sure that today's televisions are suitable for it.

Can I ask what is Your opinion about the fourth picture? Do You think it is normal that the two cables (in the red circle) are connected to each other?