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 Post subject: Seeking guidance on grounding a Garland Type A Turntable
PostPosted: Sep Mon 06, 2021 4:30 pm 
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Joined: Oct Wed 19, 2016 4:02 am
Posts: 31
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A friend of mine gave me this fully functioning Garrard turntable last week. I hooked it up to my Pioneer SX-525 receiver via the 2 RCA cables that extend from the bottom of the turntable. It functions and sounds really good except for a hum. I read in the owner's manual that the turntable needs to be grounded, but the instructions are a bit lacking in detail. It states that "the motor should be earthed by connecting a lead from the earthing tag, located on the rear of bracket holding the connecting block, to a good earthling point."

I have a few questions that I am hoping this group can help with.

1. Can I run a wire from this "earthing tag", and connect the other end to the turntable "ground" on the back of my Pioneer receiver?
2. What type of wire should I use? Insulated? Not insulated? Does it matter?

Any additional insights you can offer up are appreciated.

Thank you,
David


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 Post subject: Re: Seeking guidance on grounding a Garland Type A Turntable
PostPosted: Sep Mon 06, 2021 8:03 pm 
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Joined: Jan Wed 16, 2013 12:04 am
Posts: 2545
Location: 77001
Drr2164 wrote:
I have a few questions that I am hoping this group can help with.

1. Can I run a wire from this "earthing tag", and connect the other end to the turntable "ground" on the back of my Pioneer receiver?
2. What type of wire should I use?
Thank you,David

1. Yes, and use an insulated wire.
2. If you still have hum, consider a piece of
shielded insulated wire.

Hotwax


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 Post subject: Re: Seeking guidance on grounding a Garland Type A Turntable
PostPosted: Sep Tue 07, 2021 2:43 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 4793
Location: Boston, MA USA
The turntable must be grounded to the amplifier or it will hum badly. There are two ways of doing this:

1) As mentioned, connect some stranded insulated wire from the ground tang on the turntable to the amplifier ground terminal. It is conventional to use green insulated wire for ground (Earth in English), or.....

2) Connect a short jumper wire (bare wire is fine) from the ground tang to the outer (shield) terminal of either of the RCA jacks on the turntable. Then plugging the turntable into the amplifier will ground it automatically.

The ground wire must connect to both the motor and the steel chassis. Using shielded ground wire will never help. Regular stranded 18 gauge is ideal -- flexible but strong enough not to get ripped out by accident.

-David


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 Post subject: Re: Seeking guidance on grounding a Garland Type A Turntable
PostPosted: Sep Wed 08, 2021 3:16 am 
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Joined: Oct Wed 19, 2016 4:02 am
Posts: 31
Thank you all very much for the guidance. I am happy to report that the turntable is working just fine and sounds amazing!


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