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Old 1st March 2010, 02:25 AM   #1
Dogpile is offline Dogpile  Canada
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Default Tonearm ground wire - How to properly connect?

Hello all!

I am in the process of re-wiring my tonearm using a single run of wire from cart pins to phono preamp but I'm not sure how/where to attach the ground wire
I will be using 28 awg Discovery tonearm wire plus a separate ground wire in an unbalanced setup.


What is the best method to connect the ground wire?

A) Attach the ground wire to arm tube (or base of tonearm) which then connects to the phono pre?

OR

B) Attach the ground wire to the shielding of the cable itself (on the tonearm end)?

Comments and suggestions are appreciated

Last edited by Dogpile; 1st March 2010 at 02:28 AM.
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Old 1st March 2010, 06:57 PM   #2
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Quote:
Originally Posted by Dogpile View Post
Hello all!

I am in the process of re-wiring my tonearm using a single run of wire from cart pins to phono preamp but I'm not sure how/where to attach the ground wire
I will be using 28 awg Discovery tonearm wire plus a separate ground wire in an unbalanced setup.


What is the best method to connect the ground wire?

A) Attach the ground wire to arm tube (or base of tonearm) which then connects to the phono pre?

OR

B) Attach the ground wire to the shielding of the cable itself (on the tonearm end)?

Comments and suggestions are appreciated
normally ground wire connect TT's base and amp's case mainly for safty, I have no shielding in my cable as long as they twisted tie and with very thin isolation in between, will not pick up hum easy, detail you can read the thread (build your own tonearm cable) in this forum
tony ma
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Old 1st March 2010, 07:06 PM   #3
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Check for continuity from headshell and arm base.If it is ok,attach the ground wire on the arm base,so that the arm will be grounded.Shielding of the cable itself can be either soldered in the RCA --- terminal,or attached on the amplifier ground terminal.You can use a small length of wire (to connect shield to amp) with a spade lug for this.The shield will remain unterminated at the arm end.
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Old 2nd March 2010, 02:14 AM   #4
Dogpile is offline Dogpile  Canada
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Thanks for the suggestions!

Would there be a ground loop if the ground wire is attached to the arm tube as well as to the phono cables internal shielding?
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Old 2nd March 2010, 05:18 AM   #5
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No since you will leave the cable shield open at the arm end.
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Old 3rd March 2010, 05:59 AM   #6
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Hi,

What will be the case with schroeder wood arms ? How will the ground cable be employed ?

Best regards,
Bins.
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Old 3rd March 2010, 11:03 PM   #7
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Originally Posted by binspaul View Post
Hi,

What will be the case with schroeder wood arms ? How will the ground cable be employed ?

Best regards,
Bins.
I don't have any experiece with the schroeder,but I would say if you ground the base should be ok
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Old 3rd March 2010, 11:37 PM   #8
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won't work as the arm is suspended by a non conductive string, and there is no direct electrical contact.

A 5th wire would have to be added to ground the headshell, which would go to the system ground ( or where ever you would normally ground your arm).

JD

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Originally Posted by Panicos K View Post
I don't have any experiece with the schroeder,but I would say if you ground the base should be ok
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Old 3rd March 2010, 11:53 PM   #9
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Originally Posted by Jeffrey Davison View Post
won't work as the arm is suspended by a non conductive string, and there is no direct electrical contact.

A 5th wire would have to be added to ground the headshell, which would go to the system ground ( or where ever you would normally ground your arm).

JD
Hi,thanks.I haven't seen one of these from close
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Old 13th March 2011, 01:38 PM   #10
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Quote:
Originally Posted by Jeffrey Davison View Post
won't work as the arm is suspended by a non conductive string, and there is no direct electrical contact.

A 5th wire would have to be added to ground the headshell, which would go to the system ground ( or where ever you would normally ground your arm).

JD
explain, attach 5th wire on headshell, what if headshell is also wood
please can you explain that
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