TELEWAVE's TPCP-1542C 148 – 174 MHz two-cavity preselector offers high performance in a compact design. Custom-extruded 4 sq-in cavities allow horizontal mounting on a standard 19 in rack, with rack height of 5.25 in. The TPCP-1542C uses two cavities to provide typical attenuation of better than 50 dB at +/- 5 MHz, and insertion loss of 1.0 dB or less.