Is there an ideal length for the center wire in a TV's coaxial cable? Sometimes I'll get snow on the screen. When I do I jiggle or disconnect and reconnect the coaxial and the picture will become crystal clear. Then later, usually when I turn the TV on again, the snow might be back. I've already swapped out the coaxial cable and it didn't help. I'm wondering if there heeds to be a "standard" length of center wire and mine is either too long, or too short -- but I don't know which. Any ideas on how I can get the snow to go away permanently?
I doubt it has anything to do with the length of the center wire and/or the length of the cable... unless you're talking about miles.
I'd be willing to bet that the RF terminal on the back of the TV is loose, or has an intermittent connection to the tuner. That's why it works when you wiggle it.
You'll probably need to have a service tech check the RF connection and resolder some stuff. Worst case is that the RF tuner needs to be replaced. If you're good with a soldering iron, you may be able to diagnose and repair this yourself, but be careful if you do.
There should be at leat 1-2 milimeters sticking out of the end or "screw" of the coaxial cable. Ive tried a bunch of different designs and this one seems to work best. But if you are getting a snowy picture, its time to get a new cable because this one sounds like its old.
sorry just reread the question, there really isnt a legnth for a coax cable but if you do get snow even after you've changed it then do what matt whitlock said. But make sure to be careful in doing this because there is a risk of electrocution. Make sure still that there is a 1-2 milimeter cable coming out of the screw.