I have been doing some wiring in my house and need some help.  I have 2 different RG-6 coax feeds I want to go to each TV.   RG-6 A is Comcast (basic) but it carries my HD locals to all TVs.  RG-6 B is a modulator that has my DTV and Comcast digital box.  I can get RG-6 A to each TV and get HD locals and I can get RG-6 B to each TV and get comcast or DTV.  I want to combine these 2 signals so I get both hd locals and the modulated channels (72, 82) on 1 run to each TV.  
Is there a combiner that will allow both signal down 1 coax?  I am familiar with satellite and home theater but not much of a cable guy.  Thanks
Ken
    
    Two cable sources
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