Hooking up my power mac to my stereo creates problems?

10 posts / 0 new
Last post
Offline
Last seen: 16 years 1 month ago
Joined: Oct 28 2006 - 01:26
Posts: 51
Hooking up my power mac to my stereo creates problems?

So I am on my second power mac and am having the same problems when it comes to hooking it up to my home stereo. When everything is hooked up I can hear voices in the background whether or not anything is playing. When I shut the computer off it's still there. However when I unplug the cable from the computer it vanishes.I think its a radio show im hearing by the way. I can't figure this out for the life of me. My first mac (B&W G3) did this and now my current computer is too (DA G4). How do I fix this?

Dr. Webster's picture
Offline
Last seen: 19 hours 12 min ago
Joined: Dec 19 2003 - 17:34
Posts: 1753
Buy a shielded audio cable, a

Buy a shielded audio cable, and plug the computer and stereo into a power conditioner or UPS. Nearby radio stations can be strong enough to bleed into unshielded power or audio cable and be amplified. Shielding your connections and using a power conditioner/UPS to buffer your equipment from the electrical grid should clean things up.

Offline
Last seen: 6 months 3 weeks ago
Joined: Jan 19 2005 - 23:30
Posts: 700
try grounding the computer ch

try grounding the computer chassis to the AM ground connector on the amp or chassis ground. sometimes, but not all, this helps.

themike's picture
Offline
Last seen: 12 years 7 months ago
Joined: Jul 21 2004 - 19:33
Posts: 455
I was having this same proble

I was having this same problem for a while as well. I found that turning off my FM tuner solved it. If your stereo is multiple components, I'd suggest trying this first.

Offline
Last seen: 16 years 1 month ago
Joined: Oct 28 2006 - 01:26
Posts: 51
The FM tuner is always on. bu

The FM tuner is always on. but I dont think it's the stereo as it has no problems on any other device. I just hooked up my normal PC speakers to my computer and I can still hear it.

Offline
Last seen: 17 years 1 month ago
Joined: Oct 17 2006 - 04:13
Posts: 84
RFI: Radio Frequency interference

Hello:

Ditto on the grounded and or shielded speaker wires.
The speaker wires are probably acting like an antenna.
A little corrosion at a connection can act like a diode.

Same theory that the old crystal radios for AM (and other bands) of old may be at work here.
You might be hearing Short Wave, C[hildren's] B[and], or other radio transmissions.

I like the shield, ground, and make sure you have clean connections to the speakers notions, also.

I would have to look in the ARRL Handbook for other ideas, too.
[Amateur Radio Relay League] There may be some advice on the www.arrl.org web page.

Good Luck.
David
KA5GLT ... a real "ham" sometimes

Offline
Last seen: 16 years 1 month ago
Joined: Oct 28 2006 - 01:26
Posts: 51
well I tried the suggestion o

well I tried the suggestion of a ground wire and it almost eliminated it. Is there another spot I could ground it to that might be better?

DrBunsen's picture
Offline
Last seen: 10 years 2 days ago
Joined: Dec 20 2003 - 10:38
Posts: 946
If the stereo has a phono/tur

If the stereo has a phono/turntable input, there should be a grounding mount point there as well - a screw down on the back panel. You could try grounding the computer chassis to that.

Jon
Jon's picture
Offline
Last seen: 13 years 1 month ago
Joined: Dec 20 2003 - 10:38
Posts: 2804
We have that problem even if

We have that problem even if the speakers aren't plugged into anything but wall power. I put several ferrite chokes on the wiring and it quieted it down, but it's still there. I've read that it may also be old wiring in a house that is part of the problem. It was to the point that if I play with the volume I can hear the particular station very clearly. I've since moved the computers to a different room and thus different part of the wiring and the station itself is more limited, but I tend to get a varying interference buzz. It even changes over the course of the day/night. I'd say to follow the advice for a power conditioner.

Offline
Last seen: 16 years 1 month ago
Joined: Oct 28 2006 - 01:26
Posts: 51
I connected the computers "gr

I connected the computers "ground wire" to the ground on the back of the stereo (as shown by the ground symbol). Now the stereo doesn't have a ground pin on the plug (i'm not too experienced with AC voltage.) will this effect it?

Log in or register to post comments