I need a narrow (Split) Permakay filter. My receiver is a TA-191-W and it has a K-8436A W filter in it. This is the big one with female RCA connectors on it. It is 2.5 x 4 x 5.5 inches. The conversion kit SK9458a has one in it. It is probably marked 8436 'S' Long live Motorola's. Paul w0rw