To connect old turntable to mains earth or not?

[lecky_bob]

Hi Guys,
I am renovating an old vinyl turntable (Thorens TD-150 mkII is anyone cares)

It is fitted with a 2-core mains cable, but there are lots of metal parts including sub-chassis and a 240v motor! Normally this is all earthed via the amplifier (phono leads), but I have swapped the 2-core for a 3-core and earthed the sub-chassis to the mains earth. The arm itself is still earthed via the amplifier but is not connected to the sub-chassis or motor.

Question for the experts: which is safer? Have I done something dangerous by earthing to mains this way?

Thanks

 

[DPG]

Manufacturers instructions state no earth does it not?

The Thorens decks I have had have always had a flying lead which needs to be connected to the earth terminal on the amplifier. There is a chance he has a version which doesn't, but I doubt it. I've had a 150Mk2 (albeit many years ago) and it had the earth lead.

I suspect it may be missing and this is why there is hum.

 

[Lucien Nunes]

what speakers and amplification you use

Depends where I am, items circulate, plus some kit is in storage at the mo. Example systems:
Spendor SP1 + S/S amp of my own design (last seen in living room, now in storage)
Kef Concerto + Pioneer SX-1980 (study, Sony TA-5650 stood in for Pioneer for a while)
B&W DM1 + Quad 520 (workbench #1) + optional sub various
Leak Sandwich + 2x Leak TL12+ or Richard Allan A41 (workbench #2)

 

[DPG]

Some nice stuff there. Currently have a nice pair of Wharfedale Dovedale IIIs but have had load of different ones in the past. Quad 405/2 power amplifier was nice paired with Arcam Delta 2 speakers. Have had Leak TL10s which I picked up second hand around 20 years ago for £30 for the pair! Wish I'd kept them.

 

[DPG]

My dad had some Pro 9TL home built transmission line loudspeakers. They were fantastic - amazing sound. 3 way design and used the legendary Kef B139 polystyrene bass driver. Weighed a LOT. Driven by an old Trio receiver which had a motorised tuner dial.

 

[pirate]

I used a couple of unbreakable H+H 100w amps feeding WEM cabinets...they were for my disco setup, but sounded great in the house! Leak Deltas with Shure cartridges..oh, how envious were my mates with their Garrard sp25 Mk 4 decks and Goldrings and, yes, AMSTRAD amps!
fk! that was 45 years ago!
Those H+H amps though...

 

[DPG]

You started off well Pirate and then spoilt it with the Amstrad amps!