Hey Ed,

Doing it your way with the Radio Shack piece will be ok if the runs are not that far, and you keep the cables from running parallel with any power wires and other strong RF emitting devices. The outputs on the Radio Shack piece are buffered but, you could suffer from lack of output if the runs are to long and RF noise problems. The advantage with modulator is that when using coax you have better shielding in theory, it carries both the audio and video signal on one cable, and because of the strong output on the modulator you can run long runs to a lot of TV’s before having to boost the signal. You could use the coax cable to run your video from the Radio shack device to the TV’s and use an RF to RCA connection to hookup to your video inputs on the back of your TV’s and Radio Shack device. There are several reasons why we do not do it this way but, it doesn’t mean that you can not do it your way providing that you are a little more careful.

Good Luck
Greg Brown
Entertainment Technologies
Dallas TX