DLW Associates FL1718: High Pass Filter, AM Broadcast Band Reject, Brick-Wall, 200 W CW & SSB, SO-239, Each - DLW Associates AM Broadcast Band Brick-Wall High Pass Filters are 9th order elliptic designs that have a very sharp slope occurring between 1.8 and 1.7 MHz. These filters ...DLW Associates FL1718: High Pass Filter, AM Broadcast Band Reject, Brick-Wall, 200 W CW & SSB, SO-239, Each - DLW Associates AM Broadcast Band Brick-Wall High Pass Filters are 9th order elliptic designs that have a very sharp slope occurring between 1.8 and 1.7 MHz. These filters effectively attenuate all AM broadcast band signals in excess of 40 d - B.
It's just as if those signals run into a brick wall! Proper location for these filters is at the output of an HF transceiver and before an amplifier, antenna tuner or antenna. They are optimized for a 50 ohm input and output impedance. - These filters are packaged in high-quality cast aluminum (O-ring sealed) cases with SO-239 flanged PTFE dielectric coaxial fittings.
Their components consist of high-Q high-voltage NPO ceramic and mica capacitors and high-Q toroidal coils mounted on a double sided printed circuit board. The PCB and coils are coated for stability and long life. All mounting hardware is of quality stainless steel.
- FL1718 filter specifications:* Maximum transmit power ratings: 200W CW or SSB* Pass band loss: less than 0.85d - B (1.8 to 54 MHz)* Stop band loss: greater than 40d - B (1.7 MHz and below)* Return loss: less than 20d - B (1.8 - 54 MHz)* SWR: less than 1.2:1 (1.8 - 54 MHz)Got BCI on 160 meters or higher? Broadcast Band Interference is common when your location is near AM Broadcast stations. Put up a brick wall against it! Order DLW Associates AM Broadcast Band Brick-Wall High Pass Filters from DX Engineering.