The AE1L9080 from Anatech Electronics is a low pass filter that operates up to 1 MHz. It has an insertion loss under 0.5 dB, return loss of more than 15 dB and a rejection of more than 45 dB at frequencies above 3 MHz. It is available in a module that measures 2.5 x 1.50 x 0.75 inches with BNC male-female connectors.
