A little ot but still coax related

[tcg]

I have cable from my local cable company but they don't supply my local over air digital channels only the main channel for each station not the sub channels.

My cable drop line comes in to a splitter that feeds 3 tvs. I want to put up an outdoor antenna and run that line to the same splitter to feed the same tvs.

The tv would have a splitter to feed a digital converter box and the tv.

In other words I don't want to run new coax to each tv but share the same line with an outdoor antenna and the cable.

If I explained that right will it work?

Matt

[N_Jay]

No, don't do it.

Hooking an antenna to the cable system will allow the cable system to radiate (Bad thing one), and will allow outside signals onto the cable (Bad thing 2)

Splitters work both ways,

[n5ims]

I agree, you should never attach an antenna to a cable-tv system. If you have a bad cable TV system, this will just make things worse. If you have a good one, they will locate the signal "leak" from your antenna and charge you for the service call to "fix" the problem.

One other bad thing that this will cause is if you have a local signal on the same channel used by the cable-TV system, this will make so that channel will not be good for either the over-the-air or cable signal, even if they broadcast the same "channel" on it.

[tcg]

OK

New cable run it is.

Thanks

[k4sgt]

One more important reason that this is a no-go is because cable systems use nearly all frequencies from 25 to 1000 mhz. This means that the local TV station freqs are already in use in the coax. You will be mixing signals and causing problems for you neighbors. It won't take long for the cable company to track the problem down to your home. I have seen TV sets feeding AC back on the line and messing up neighbors cable reception. This would be way worse.

Barry
K4SGT