MFJ-8504NB lets you hook up to four SDR radios, shortwave receivers or transceivers to two receive antennas! The AM notch filter prevents noise from strong broadcast stations. This lets you monitor several signals at once -- an amazing receiving post! This broadbanded radio multi-coupler has excellent performance from 300 kHz to above 850 MHz, 30dB IP3. Reverse polarity protection, internal fuse, BNC input/output. Unused ports automatically terminated. Rugged, fully shielded aluminum, 6Wx13/4Hx33/4D in. Use 9-15 VDC@150 mAnominal or 110 VAC with MFJ-1312D. MFJ-8504 Products MFJ-8504AN Add an AM Notch filter to your MFJ-8504B and MFJ-8504S $44.95 MFJ-8504B Like MFJ-8504NB but without the Notch Filter $169.95 MFJ-8504HP1 Add a 30 MHz high pass Module to the 8504 $29.95 MFJ-8504HP2 Add a 1.7 MHz high pass Module to the 8504 $29.95 MFJ-8504LP Low Pass Module for 8504 $29.95 MFJ-8504NB SDR RECEIVER MULTI-COUPLER, W/AM NOTCH FILTER, BNC $189.95 MFJ-8504NS SDR RECEIVER MULTI-COUPLER, W/AM NOTCH FILTER,SMA $189.95 MFJ-8504S Like MFJ-8504NS, but without AM notch filter $164.95 Product Manuals Download Product Manual
