MFJ's new Passive Preselector has extremely high dynamic range! It improves the performance of nearly any HF or shortwave receiver/transceiver, even the most expensive receivers. Especially helpful to those with broadband front-ends that are prone to overload.
Protects your sensitive receiver input from damage (including switching diodes and attenuator resistors) caused by very strong signals from multi-transmitter, multi-band operation -- contests, field day, nearby hams, CBers, TV/FM/AM stations.
It eliminates phantom signals by suppressing strong out-of-band signals that cause intermod, blocking and cross modulation. Completely eliminates second order intermod problems caused by strong out-of-band shortwave broadcast signals mixing and producing unwanted in band signals.
Note: This is not a pre-amplifier, it does not boost signals.
