Weird buzzing when connecting TV via Line In

[ExtremeODD]

Im currenly using my sound card so I can use my tv on my sweet Klipsch 5.1 promedias. Im using a 6 foot male male cable and a 20 foot female male cable, and when im listeing to the tv there is a loudish BUZZZZZZ noise, not too bad, but pretty annoying, any tips/tricks to fix?

[trajik78]

that's a grounding loop. When two or more devices are connected to a common ground through different paths, a ground loop occurs. Currents flow through these multiple paths and develop voltages which can cause damage, noise or 50Hz/60Hz hum in audio or video equipment. you can remedy that humming by lifting the ground (getting a 3 prong to 2 prong power adapter) but then your chances of getting a shock are much higher if your futzing around with your electronics. Best thing to do is buy a ground loop isolator from Radio Shack which attaches to your RCA cables.

http://www.radioshack.com/product.as...t%5Fid=270-054

[ExtremeODD]

im not even using rca cables heh, all im using are the ones with the jack just like headphones (forgot the mm size) and running that from the headphone jack on my Tv. But thanks for the reply heh

these are what I have

http://www.radioshack.com/product.as...5Fid=42%2D2387
http://www.radioshack.com/product.as...5Fid=42%2D2560

maybe not the EXACT item, but the same in function

[trajik78]

doesn't matter if it's rca or 1/8" it's the same principle, as long as both your computer and tv are on seperate outlets and are connected by an analog cable then you can get this humming.

[ExtremeODD]

oh sorry, I ment the ground loop isolator (atleast that one) wouldnt work on this

[trajik78]

Originally Posted by ExtremeODD

oh sorry, I ment the ground loop isolator (atleast that one) wouldnt work on this

oh, right. yeah well you can get adapters if you can't find an 1/8" version.

1/8" stereo male y-cable to female rca, thenhook in your existing ccable then get 2x female to female rca af\dapters for the other end and then the isolator then your reciever.

[ExtremeODD]

so would I need something like
2x http://www.radioshack.com/product.as...5Fid=274%2D889
to throw in the ground loop isolator?

[trajik78]

that but it needs to be stereo, that one is mono. stereo will have two rings at the top. but 2 of those will do if both ends are 1/8 stereo inputs. what are you plugging the computer sound card into?

[ExtremeODD]

Ok I went to radioshack and got the 2 adapters and the ground loop isolator, works great thanks. One thing, the isolator came with an adapter, so now I have an extra one heh

[trajik78]

awsome, glad to hear all is well. i had the same problem with my old apartment...