HI,
I have search online and done as much trouble shooting as I can. We where having problem with getting on demand and the higher channels since we got a TIVO on our living room TV. We narrow the problem down to the old rg59 cables and tons of splitters. So i went out bought a spool of RG-6 Quad, compression end, Antronix amplify 8 port splitter and some cat5e while i was at it. So my friend and I re-wired the whole house, ran a new cable from the outside box to the inside of the house, and also ran a new ground and we clean and dioxide the end in the ground. We got everything working and the TIVO can see On demand now and all of the channels but on my computer and the kitchen TV i get some ground. i try different cables and nothing, i brought a tv that works fine in another location and that tv work fine in my computer location. toked the kitchen tv to a location where a good tv works good and still gets the ground loop bars. I don't know what else to do! could it be that the kitchen tv and my tv tuner card does not like the new amplifier? Also i plugged my tv tuner card straight to the main line and it works good. Any suggestion would be greatly appreciated.
thanks
Carlos
P.s. this is the only blog section that i thought this topic would fit in. Mods please move if needed.
P.s. #2 this is the link to the amplifier http://www.antronix.net/Products/category.php?page=amplifiers&i=5

If the tv that you tried doesn't have a ground connector, I don't think you can get a ground loop. If you tried a laptop with a tv tuner you shouldn't have ground loop issues either since the laptop is isolated from ground.

It sounds like it could be a signal level issues, maybe the signal is to strong now with the amp. Try decreasing the signal level a bit by putting a attenuator on or if you still have some of that cable left, try adding 100'-200' of cable off of the outlet to the tv. You could also use a splitter if you terminate all the open ports.

If you want to check for ground issues, use a voltmeter between the shield of outside part of the cable and the ground pin on your outlet.

yea the tv in the kitchen is old and 2 prong but my desktop computer is of coarse 3 prong and the tv tuner card is pretty new. I just let my buddy borrow the multimeter so i will have to do it this weekend and the the ground on my computer(totally forgot of that idea). Is there anything out there that i can use other than 200' of cable. AKA maybe a splitter or do they make signal reducers or maybe i can build my own reducer? this is my tv tuner card, a Hauppauge WinTV HVR-1600 NTSC/ATSC/QAM Combo

They do make inline signal reducers (attenuators) but I'm not sure if your local Radio Shack would carry them or not. A splitter will work but you will want to make sure to terminate the other ports that don't go to the tv, other wise you can get reflections and cause more interference. Radio Shack should carry the little acorn terminators (75 ohm). A 2-way splitter reduces the signal ~3.5db, every time you split the signal you reduce it by that much, so the loss through a 4-way would be 7db per port.

Try a 2-way first and if it's still there try a 4-way. 7db should be enough, if you start to see snow you know it's to much.

Also, check your connections behind the wall plate and at the splitter, make sure there is no metal braid touching the center conductor, and that there is no dielectric stuck to the center conductor.

Yea i checked all the cables in the house to make sure that there is no metal braid touching the copper wire

I had ground loop problems with the RG-6 CATV coming into my house. I measured over 100 mAmps A.C. between the CATV shield and my house ground. I fixed the problem by using a coaxial ground lifter that I pulled out of an old "hot chassis" (TV with no transformer and AC mains connected through a rectifier to circuit ground in the TV) TV. Basically it looks like a cube one half inch one each side with an F connector on one side (this would appear on the back of the TV, i.e. a female connection) and a small coax on the other side that connects to the TV chassis. This keeps the A.C. on the "Hot chassis" from appearing at the coax. Electrically, the cube is actually a small capacitor connecting the shields and an actual capacitor connecting the center conductors. I've never seen one for sale, but with all the hot chassis TVs around (most are this way) you should be able to scrounge one up.
Good luck,
John B.