A nut shell filter allows the shell filter media to be scrubbed without being removed from the filter vessel. In an MPEG stream, a header is followed by DCT blocks. The pintle is mounted longitudinally in the housing, is rotatably relative to the housing and has an outer end and an inner end. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RFbaseband conversion. Projectiles include two relatively massive ends fabricated from balls similar to golf balls, separated by a flaccid cord or rope.