I need the help of the masters in atari knowledge again.
I have the jaguar with this RF out that goes to a box:

and a LG TV with that RF input:

For some reason using a RCA cable from one to another is not working. I have a very long (5m) and hard body cable that I tough it would work but it doesn't.
Using an adapter in my tv for RCA to that screw rf does not work either.
The jaguar works in another tv I have that has the normal rf screw thing.
My atari 7800 have the same problem but it works, with a bad image but it works. So I think the problem is in the cable.
What kind of cable should I get ?
I'm ordering the AV composite RCA output cable from myatari but as everybody knows, Brazil custom sucks and I'll only get the cable in 1 or 2 months from now, so I want a cheap and accessible way to play my games until the AV cable arrives.
How can I hook them ?














