Where does a tv antenna booster / amplifier in the plug?

ie plug it into an outlet or is there a point on the same antenna so that the booster can be connected?

no, not the air itself.you have the cable from the antenna and connect the TV now, if you want using antenna amplifier and then the cable from the antenna is pluged in signal booster (The cable must connect to the site of entry of reinforcement) and then must make another cable to connect from the output of reinforcement for the tv. Note: you may have connectors for the antenna cable and output cable to connect to the dose reinforcement.

Mini Amplifier/volume booster (dealextreme.com)

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