pc to stereo help....

[baturkin17]

I have my pc hooked up to my home receiver via some custom wires I made, and all was well until I got cable internet.



Now I get this loud buzzing sound, like from a guitar amp. The only thing I can come up with is that there is some sort of interference from my cable modem.


have any of you heard of this happening before?

[eamon7]

my guess is that you now have a ground loop between the cable and your electrical outlet. the electrical systems are out of phase. you could try either connecting a wire from the cable ground and your computer case and see if it quits. another way is to try a ground lift adapter (2 to 3 prong) on your computer power cable. even plugging into another outlet may help if it is in phase with the cable. remember that there are 2 phases coming into your house. some outlets are on delta phase 1 and some are on delta phase 2. you need to match your computer to the same phase the cable company is using or you will get a ground loop that can be up to 120 volts

[baturkin17]

well i took a wire and connected it to my pc power supply and wrapped it around the coaxil cable connector to act as a ground , and it reduced the buzz dramatically, althoguht you can still sorta hear it.

is this a good idea or should i try something else?

i am using a sugre protector on both my stereo and computer, but both surge protectors are not on the same wall outlet

[BlackDiamondJr]

The problem seem to be in you home made cables. You should opt for som ready made cables.
You may also try a ground loop isolator frequently used in car audio installation. I use one of those in a run between two audio receivers with multi-zone setup for just that purpose.

[baturkin17]

this is how i have my set up..

http://www.boomspeed.com/baturkin17/cable.JPG

when i unplug the cable from my tv the buzz from my stereo goes away.

it doesnt make sence!!!!!

[PhilEnfield]

I agree with BlackDiamondJr, that it may be your cables.

If you dont want to use shop bought ones, try changing the cable to a heavier shielded coaxial cable and see if this helps.