Very thanks, Billy.
Yesterday I use 12v and it´s Ok, work perfect.
First I open the injector, and it´s very simple circuit, one diode, two transistors, two leds, three condensers and eight resistors. I checked the specification of all components, and 12 volts is not a problem for it, and the amp specification is 9-12v +/- 1v.
The system works perfect (IFB100 + L-Com Amp + SCR12 Antenna), but I can´t use the same battery for L-Com Amp and my analog material (SQN Mixer / Audio Ltd Wireless) because it inject noise of 2.4 modulation on my audio signal.
The other problem is that less 10 meters, I have this noise modulatión on my audiolimited Tx2040 wireless... But for this distance I don´t need 1W Output.
Thanks!!!