AVS Special Member
Join Date: Aug 2004
Location: N.W. Washington
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Your Sony A/V amplifier is NOT a cable TV or FM amplifier.
I am guessing the cable guy on the service call checked your signal levels at the demarcation point (usually the ground block) and they were within specifications.
So the problem lies within your home and adding a signal amplifier will probably not help. You need to check every cable run and connection for bad crimps, bad cable (replace any long RG-59 cable runs with RG-6 cable), replace any old splitters that are rated less than 1 Ghz, remove any splitters that are not really needed.
If you can not do this yourself, some cable companies will do it for you, but they charge for this type of service. Ask around maybe one of your friends or coworkers can help you or know someone who will do it cheaply...
A 'phile and his money are soon parted...