I've just installed it but I must have made something wrong because my Tv can't see the Composite searching among the sources for it with the Atari turned on even.
What I've made is to use another device that uses Composite, select the Source with the Tv (it found it fast) and then to connect and switch on my Atari 400 instead. It showed something on screen, but awful. It was working though. If I insert the Video chip again, the RF connection works right like before and everything's fine.
And it's not my UAV Rev D. that fails as I had another as do-it-yourself kit that I've mounted and I've tried both with the same results. The jumpers seem to be ok.
I guess that it has to be something very wrong to not show the Composite Source even.
Do I also solder a ground cable to the board?. If so, where do I take it from?.
Attached a photo of the second board I've tried: the do-it-yourself one.
Edit: I have to say that I've made a mod soldering 4 cables and I'm using a new board to have 48K. I've tried the BattleZone cart and it was working although it's shown very very badly with the UAV board by now. I'm sure that it will look nice using RF.