Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!know!sdd.hp.com!hp-col!col!ppa From: ppa@col.hp.com (Paul Austgen) Newsgroups: sci.electronics Subject: Re: CATV filters Message-ID: <38610008@col.hp.com> Date: 11 Apr 91 16:12:47 GMT References: Organization: HP Colorado Springs Division Lines: 12 In my opinion, you should always try to buy a commercially available filter whenever possible. Filter design is tricky and time consuming. You might check with local electronics suppliers that carry CATV/MATV product lines. The output of a VCR is generally very "dirty", and a bandpass filter on the output would probably help. You should also be aware that if you are combining signals on the cable feed, you run the potential of interfering with aircraft and other commercial radio, and are probably in violation of local regulations of the cable company. Such tinkering needs to be done properly, or lots of trouble may result.