MFJ 1048 Passive Preselector
MFJ's new Passive Preselector has extremely high dynamic range! It improves
the performance of nearly any HF or shortwave receiver/transceiver.
It vastly improves 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 multi0transmitter,
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.
MFJ's unique Hi-Q series tunable circuit gives you superb performance. The
tunable series tuned circuit works into a very low impedance formed by broadband
toroid transformers.
Has narrow bandwidth, excellent stopband attenuation, very low loss, constant
bandwidth and gain over each band. Excellent attenuation in adjacent contest
bands.
The entire 1.6 to 33 MHz HF band is covered in five overlapping bands.
An RF sense transmit/receiver switch w with adjustable time delay automatically
bypasses your MFJ-1048 when you transmit. Also has PTT line T/R switching. Plugs
between antenna and transceiver.
Fully shielded metal enclosure. Tough black finish.
Download Manual
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