after a counsel into this forum, I bought a 2.4ghz Lawmate vtx (500mw) and his dedicated law mate vrx:
Now, I have powered the vtx with 2s lipo, so his built in cable voltage regulator will power the vtx at 5V (my voltmeter says 4,96Volts, so it's perfect!), and the vrx at 3s (12VDC), it work great!
The quality of video is good, but there is a problem: The image slide continuously to the left, and come back from the right, why this problem?
I tryed to test with a 8dbi patch antenna, the quality is ever good, but the image will ever slide to the left....