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No Ground on Thorens TD 145 MKII + some questions

I purchased a real nice Thorens Turntable for my 13 year old son's system. (Mini Me) I unpacked it and no ground wire. I hooked it up and all is fine , it sounds great. No Hum or problems. I have never seen a turntable without a ground wire. The previous turntable in this system was unusable without the ground wire connected. I opened the botom and noticed a wire running across the bottom of the inside, with no provision to attach a ground wire. Is this normal on this model ? Should I run a ground wire to this wire or leave well enough alone? Also I could not get the inner platter to come off , I wanted to lubricate the spindle. Is there a trick to getting this part off? Thanks !
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Showing 1 response by dekay

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dekay
5,689 posts
 
If it is a typical Thorens "TD" design there should be a single tiny screw located towards the center of the bottom. Removing this screw will release a pot metal brace along with the inner platter.

This screw is also "generally" what the external ground wire is attached to. The internal ground is most likely linked to the one channel channel of the phono IC. If you remove the plastic cover you should be able to see the barrier strip @ which the tonearm leads meet the phono IC and the internal ground will be the odd (fifth) wire located @ one end of the barrier strip.

If it does not hum, then don't worry about an external ground.
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