Following on from this thread: http://www.avforums.co.za/index.php/topic,4887.msg66384.html#msg66384
Basic setup is the Garrard 301 mounted with a SME 3012 arm...
Anyone who has worked with SME arms will know that the the RCA leads plug into the bottom of the tonearm with a proprietary SME connector...
Now at the end that plugs into the tonearm is an earth lead. I always assumed (from turntables I have taken apart) that this must be attached somewhere to the turntable assembly....
When I did that about 50% of the hum disappeared but it was still intrusive.... So I disconnected the lead and found that I could get rid of 96% of the hum by looping it back and connecting it to the SME baseplate ??? ??? ???
There is still a slight hum that mostly disappears if I touch the baseplate and one of the mounting bolts on the Garrard...
Does anyone know where that earth lead is really supposed to go? Is there a possibility that the earth wire in the tonearm is either broke or disconnected...
see attached diagram...
Basic setup is the Garrard 301 mounted with a SME 3012 arm...
Anyone who has worked with SME arms will know that the the RCA leads plug into the bottom of the tonearm with a proprietary SME connector...
Now at the end that plugs into the tonearm is an earth lead. I always assumed (from turntables I have taken apart) that this must be attached somewhere to the turntable assembly....
When I did that about 50% of the hum disappeared but it was still intrusive.... So I disconnected the lead and found that I could get rid of 96% of the hum by looping it back and connecting it to the SME baseplate ??? ??? ???
There is still a slight hum that mostly disappears if I touch the baseplate and one of the mounting bolts on the Garrard...
Does anyone know where that earth lead is really supposed to go? Is there a possibility that the earth wire in the tonearm is either broke or disconnected...
see attached diagram...