need help on old CRT tv

a year ago by Salcie to c/retrocomputing

hi there, wondering if I could get some help here:
I have an old CRT tv black and white, I've plugged it to an HDMI/composite to RF modulator HDM69

It used to work some time ago but can't find out why it doesn't anymore

When I don't plug anything it seems alright (but not sure it really is) but as soon as I plus HDMI or composite my tv doesn't display things right
Notice that it works on my modern tv
Here is a video showing what's happening video

Any ideas ? <3

PS: the horrible noise is my vaccum cleaner

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Salcie 1 point a year ago

So what is happening is quite simple:

I AM FRENCH

which is considered bad when using old TVs. Why ?

Because we use L and L' bandes when most modulator are using B/G or things like that
So, that won't work properly.

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Salcie 1 point a year ago

So I got it working by buying an Terra MT47 modulator !

thanks to @mayasynth@eldritch.cafe and her advices !

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