The MFJ-1046 Receiver Passive Preselector 1.6 - 33 MHz is a highly effective device that significantly enhances the performance of HF and shortwave receivers/transceivers. It is particularly beneficial for receivers with broadband front-ends that are susceptible to overload. This preselector safeguards your receiver input from potential damage caused by strong signals from multiple transmitters, multi-band operations, contests, field day activities, nearby hams, CBers, and TV/FM/AM stations.

One of its key advantages is its ability to eliminate phantom signals by suppressing strong out-of-band signals that cause intermodulation, blocking, and cross-modulation. It completely eradicates second-order intermodulation issues resulting from the mixing of strong out-of-band shortwave broadcast signals, thereby preventing the production of unwanted in-band signals. The MFJ-1046 features a unique Hi-Q series tunable circuit that delivers exceptional performance. This tunable series-tuned circuit operates into a very low impedance created by broadband toroidal transformers. It offers a narrow bandwidth, excellent stopband attenuation, minimal loss, constant bandwidth and gains across each band, and outstanding attenuation in adjacent contest bands.

The device covers the entire 1.6 to 33 MHz HF band using five overlapping bands. It is housed in a fully shielded metal enclosure with a durable black finish. Overall, the MFJ-1046 Receiver Passive Preselector 1.6 - 33 MHz is a reliable and efficient solution for improving the dynamic range of your receiver and protecting it from strong signals and unwanted interference.