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Hello I have connected a Marantz TT173 turntable to my stereo system and I am getting a hum when the amp is on can I some how ground the turntable back to my amp at the ground screw will this get rid of the problem

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Grounding might solve the problem but you have to replace the connection cords from your marrantz to the turntable... maybe they are the one thats causing the humming.... they may be loose

Posted on Jul 19, 2009

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I get an intermittent loud hum using NAD AV316 amplifier, with stereo speakers(B connection) with phono input from Dual 606 turntable. Hum increases/changes when tone arm on turntable is touched.


The hum of course is the 60 cycle line AC voltage. Make sure that the routing of the AC power plug is as distant as possible from the stereo RCA cables.

The most likely problem is the connection of the phono cartridge to the wires in the arm. These connections usually are silver plated and become oxidized creating a bad connection. Remove the cartridge and using a fine eraser polish the connections. There is a ground connection that makes the five wire connection. Be super carfull these terminals are very easy to break

The phono connections to the stereo is very low voltage subject to interference. The connection to the magnetic pickup at the tone arm is low impedance and is inductive. Any poor connection between the cartridge up to the AV316 will produce this hum. Continue to check connections and swap cables with a known good to resolve.

I have switched the left and right cables to ensure that the cable is not the problem.

Hope this helps?

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Sep 26, 2016 | NAD Audio Players & Recorders

2 Answers

Do I need a preamp to a turntable


is the input you are using specifically for PHONO?
Are you using an MC cartridge, these require a 'more specialised' input stage to deal with MC cartridges...

Aug 13, 2014 | Audio Players & Recorders

1 Answer

Loud buzz on both channels with new turntable and phono


The ground wire needs to be attached. The hum is a result of a bad ground.

Jul 12, 2014 | Audio Players & Recorders

2 Answers

Power supply Sony PS-LX10


Connect the RCA phono plug wires usually red and white wires with plugs to a receiver or amplifier in the back of it to phono in. New receivers will not work unless you have a phono preamp. Best to buy a vintage stereo receiver or amplifier with the correct connections. Make sure you connect the ground wire which is usually a small black wire coming from the turntable to an receiver or amplifier. Turn the stereo receiver on phono. Connect it to any screw attached to metal on back or look for a ground screw. If you do not attach it it will hum.
http://www.hardwaresecrets.com/imageview.php?image=357

Apr 18, 2014 | Audio Players & Recorders

1 Answer

I have a Dual CS714Q turntable with a constant hum on output. Any suggestions?


Hello!
Did you connect single black ground wire to the "ground" terminal at your amp? Probably not! Or, it got stepped on it, while moving around. Professional of hi-fi turntables using magnetic cartridges and require 2 well shielded audio cables, connected directly to the cartridge, plus separate ground wire, which attached to all the metal parts of tone arm and body. Failure to connect this wire to the body(metal) or the amplifier, will cause this loud "hum".
thanks,
Alex.

Jan 11, 2012 | Audio Players & Recorders

1 Answer

Technics sl-BD20D turntable, attached pre amp but now have a loud hum, noticed there is a round jack with a pin in it next to the 2 outputs. Is this for grounding? Are there special cables that fit that...


Hi, Yes your turntable needs to be grounded to get rid of hum. Make sure that your turntable, preamp and amp are all powered from the same point. Most preamps do not have a grounding connection on them and when they do it is normally on the same side that the rcas from your turntable connect too. What is the make and model of your preamp. I will check it out. To earth to a preamp without a grounding connection do this. Take the grounding cable from your TT and slip it in the side of one of the 2 rca connections as you plug them in. That will ground your TT to the amp. If it doesn't then swap the ground lead to the other rca. Cheers John. Styluscity.com.

Oct 05, 2011 | Technics SL-1200MK2 Turntable

1 Answer

How do i hook a numark tt 1625 turntable to a regular home stereo amplifier...does the ground need to go into anything specific?


Turntables require a special input in the amp (usually marked PHONO) because they require high gain and different equalization - and yes, that ground wire has to go to ground unless you want to get a super annoying 60Hz hum from it!
If your amp doesn't have a phono input, you're going to have to go out and get a phono pre-amp and connect it between the turntable and the amp.
Best of luck!

Feb 26, 2011 | Numark TT1650 Turntable

1 Answer

We have a Marantz PM493 amplifier with turntable, Tape, CD and radio decks connected. Dropped something on the ribbon cables, now all we get is feedback sound from stack system.Could it be that the ribbon...


Hiya Sally_fisher,

Is the feedback sound a low hum and also does this 'feedback sound" occur whether it is selected to CD, turntable, or on all of them regardless of select?

Jul 06, 2009 | Marantz Audio Players & Recorders

1 Answer

Buzz....hum problem from turntable....


Did you ground the turntable? Most of them have a ground wire located somewhere that connects to a screw on your electrical outlet. You could be getting hum from your pre-amp if it is a low quality one. Try unhooking the pre-amp, if that is the problem you won't hear the hum. If the turntable ground is the problem you won't hear music with no pre-amp but you will still hear the hum.

Jan 11, 2009 | Technics SL-BD20D Turntable

1 Answer

Humm


where is the ground wire from the turntable connected to ? Ensure that is is connected to the phono pre-amp's ground.

Is the turntable sitting on top/near any other equipment ? Try changing the position and see if the hum reduces. If yes, then it is likely that it is picking up hum from a mains transformer.

Aug 21, 2008 | Aiwa PX-E860 Turntable

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