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Turntable buzz / ground loop problem - Audio Players & Recorders

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Hi!

I'm not sure what you are asking. The ground loop is specifically intended to reduce or eliminate buzz/hum from the turntable. If the ground loop is in place and connected as per the instructions with your turntable/receiver, these noises should not be an issue in a modern system. I would make sure that your connection is solid and at a good ground point (easy to check if you have an ohm-meter/multi-meter (which comes in handy for many things and can be had very inexpensively). If the wire is broken, it can be replaced with any wire of the same or heavier gauge.

If I've failed to understand your problem, please post more detail and I will try again. If not, please let me know if this is helpful. Good luck with your problem.

Bob

Posted on Oct 09, 2008

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The ground for the turntable connection is not working. I've got a bad hum with the ground wire attached to the screw on the receiver and a worse hum when I disconnect it. I had the turntable checked...


The ground connection on your receiver is simply connected to the metal chassis, so there's nothing that can go wrong with it. You won't have hum problems with any sources other than the turntable because their output levels are higher.

With nothing connected to the turntable input, do you still hear any hum? You shouldn't. If you do, the problem is not because of the ground connection, but because something in the receiver's phono preamplifier circuit is faulty. But if there's no hum, the turntable is responsible. The fault may be in the turntable's output cable. The shield connection may have broken loose from the terminal where it's connected in the turntable. Or your cartridge may be defective.

If your receiver is the culprit, you can see about having it serviced. Or you can purchase an external turntable preamp. Radio Shack sells one, and here's another source. With an external preamp, you can connect your turntable to one of the higher-level inputs (AUX, CD) and avoid the phono input.

Jan 12, 2011 | Yamaha RX-496 Receiver

1 Answer

I have curtis htib 1000 and it make a buzzing and humming sound and i wanted if someone can repair it for me


There are a few things that can cause this but two in particular are the most common. One is a ground loop. If you have multiple pcs of equipment hooked up a ground loop can be created. Ground loops are basically different grounds that are not held at the same potential. The second could be a power supply filter cap is going bad or possibly not in the circuit. Capacitors filter out the 60Hz noise after the AC is rectified. Any 60 hz getting into your amp will cause it to hum.

Feb 07, 2010 | Audio Players & Recorders

1 Answer

Hi. I am picking up a buzzing sound. I have had this receiver for years with no problems. Any clue?


Most likely a ground loop. Troubleshooting is difficult.
Completely disconnect devices one at a time starting with the satellite or cable box. Listen for when the hum disappears. If you have recently installed a source (cable box etc) start with that. Have you recently installed any light dimmers? Cheap dimmers can also cause ground loops.
If it is in the cable or sat box you should try to get the incoming line grounded at the demark.
Or try this:
http://media.photobucket.com/image/ground%20loop%20isolator%20cable%20tv/Dimdirol/IMG_2885.jpg

Nov 23, 2009 | B&K AVR-307 Receiver

1 Answer

I have a Sony STR-DE197 Stereo Receiver that I got used. It isn't a very old receiver. It sounds really nice except for the fact that it makes a static noise in the background. I have no idea what it is or...


Could be a faulty grounding. Do all the components do this? Usually turntables will have a buzzing noise if you don't hook it up to the ground bolt but I'm going to take a guess that maybe the amplifier isn't being grounded itself.

Aug 18, 2009 | Audio Players & Recorders

1 Answer

Hum and Buzz Ground Loop


Best way is with balanced audio lines. Use either XLR or TRS cables IF your devices have those connections.

Also, do NOT use light dimmers as these are often a source of the higher frequencies that cause buzz.

Also power ALL the interconnected audio devices from a single source outlet rrather than from mulltiple building receptacles.

Dec 17, 2008 | Audio Players & Recorders

1 Answer

I have an Alpine 3672 crossover that produces a buzzing sound in speakers.


You have to check the ground connection on the case (inside the crossover). Check if it is ok and it need only one, so if you have bolt it on a metallic part of the car try to undo this to avoid closed loops.

Oct 28, 2008 | Audio Players & Recorders

1 Answer

I have a Stanton T.80 and Vestax VMC-185XL mixer. I recently bought Rane Serato Scratch Live which requires the turntables to be grounded through the mixer...however, the turntable doesnt have a ground...


Hi gium

Sounds like we have reached that point where progressive crossover in technologies means that the usual cautions of earth continuity for the tone arm when using a phono preamp has gone the same way as phono preamps on home theatre.

Have you tried switching to the line level and set the mixer up for that level also. That may reduce any gain induced hum. However it sounds like an earth loop problem, where both decks will need to be earthed in the mixer. Check also that all the gear is running of the same power point. Different mains phases are sometimes available near each other, having any gear (power amps also) on a different phase will cause an earth loop problem.

Is the hum all the time independent of the volume levels, or change with levels adjustments and not at all when turned right down. Let me if changing to line levels helps. We can try some more things, like connecting a temp hookup wire earth to the RCA earth to mixer chassis. Cheers

regards
robotek

Oct 04, 2008 | Audio Players & Recorders

2 Answers

Playing records and there is a loud buzzing noice, also the sound is coming out distorted, one minute loud next minute quiet.please help


Make sure your turntable is grounded to your amp and that may take care of your problem. Most turntables have a seperate ground wire for that purpose. If you are having to turn your volumn up very high to get proper sound from your amp then your amp may not be new enough to accept a moving magnet phono cartridge and may be the old ceramic input type and a seperate small amp will be required. You used to be able to get these at Radio Shack. But I would look into the ground issue first as the most likely. Good luck.

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3 Answers

Buzzing from speakers


sounds like a capacitor is taking a long time to do it's job. You might want to see how much it would cost to repair.

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1 Answer

Audio Technica pl120 turntable


Have you checked your cables from the turntable? It kind of sounds like you have lost the ground connection on that side, either in the cable or in the turntable itself. Perhaps at the wire going into the cartridge. You might check all these things. Good luck.

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