Attenuator

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This device will decrease the strength of the signals passing through it. 6 dB attenuators can be bought at Radio Shack. A 6 dB attenuator will reduce a signal to one-half its original voltage (one-quarter of its power). It employs a resistor network designed to not cause any reflections in the transmission lines. The Radio Shack attenuator will not pass DC and thus must not be inserted between the mast-mounted amplifier and its power injector.

If an antenna system needs two amplifiers, where the output of one amp feeds into the other amp, too much gain (overload) can result and an attenuator is usually the simplest solution. If you don