Coax Cable problems

[hunterjwizard]

I know this is a little old-fashioned but I am having some trouble with a weird thing I am trying to do.

I have a media computer that outputs to a TV through an adapter(turning the VGA signal into an RCA signal, I know, super old school), I want to run that signal through an RF Modulator and hook it up to my house's legacy coax network, thus allowing me to "broadcast" whatever is being played from the computer to every room in the house.

The RCA signal is strong, when I plug it directly into a TV it looks great. BUT when I run that same signal into an RF Modulator, it gets very bad interfearance. I haven't even tried it over the ancient house lines yet, this is just running a six-foot cable from the modulator directly to a TV. I know the TV works because I bought it in a thrift store and it was sitting on the shelf displaying a beautiful, clear picture.

Anyway, I tried replacing the modulator but it didn't help. I've heard of filters and amplifiers, but I feel like the signal should be pretty strong coming RIGHT out of the converter....

[filmboss80]

I know the TV works because I bought it in a thrift store and it was sitting on the shelf displaying a beautiful, clear picture.

Anyway, I tried replacing the modulator but it didn't help.

That old TV may have had a clear picture in the store BECAUSE the picture source was not coming through an RF modulator. Your problem may be a simple issue of the TV's tuner not being fine tuned to the designated analog channel of the RF modulator (channel 3 or 4, most likely).

Other than that, I don't know how much more help you expect to find here with your specific issue. It's not like thousands of us are trying to do what you're doing. I would suggest you find a way to move forward from old analog TV.

[usually_quiet]

Try hooking the RF modulator up to a known good source, like a DVD player, and see if the picture improves. If not, and the TV is tuned to the correct channel and the connections are all nice and tight, then it is likely that your RF modulator produces a lousy signal. If you have a VCR, you could try using that as your RF modulator to see if it produces a better picture.

[Nelson37]

Agree with above, test with different source, verify correct channel, try a different modulator.

After you get all that done, ditch the antique crap and get some modern equipment. You will learn what a good picture really looks like.