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Sorry for such a basic question and would appreciate some help -
I have a new SUT and there is a slight hum in my system. There is a ground connection on the SUT. To ground it, do I just simply connect a thin wire from the SUT ground connection to the ground connection on my phono stage or the preamp or power amp ?
I'm not too good with the electronics side of things but I do know that sticking into the ground may not help much - or may be I'm wrong ?? Any photos or images to help explain?
Thx, Bob
"You have to leave something to your imagination"
Follow Ups:
Most SUTs have a ground lug meant to be used to connect the ground wire from the turntable.
That ground lug is also usually connected to the ground of both the left and right output connectors.
So in most cases the SUT is already grounded to the preamp.
SUTs can pick up hum if they are close to a source of hum like the power supply in the preamp.
Try moving the SUT as far away from any possible source of hum as you can.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Also try rotating the SUT to different orientations.
I married the perfect woman. The downside is everything that goes wrong is my fault.
I run my turntable ground wire to my SUT and then another ground wire from SUT to phono stage. I use wires with alligator clips that I bought at Radio Shack. They make it easy to try different grounding configurations.
Trial and error is 1/2 the key, there's all sorts of RF and magnetic garbage out there and no one configuration will solve it.
The other 1/2 is shielded cables from TT to SUT to Phono stage. Don't fall for the 'shielded cables don't sound good' B.S.
Thanks for the advice! Yes, I use shielded cables throughout my system and especially in both of my vinyl front-ends. My system is pretty much devoid of noise and hum. I couldn't be happier, especially now that I just installed Rythmik Servo Subs right beside my main speakers. The subs integrate seamlessly providing full-range sound with tight, fast, deep bass.
Thanks again,
John Elison
Good looking system.Solid state and Thiels "pretty much devoid of hum"? HT lines nearby?
The Aikido based pre should be quiet; my John Broskie Aikido boards unit is although it took some doing, like the mic cable output wires.
Quieter still, even with the notoriously microphonic 76s, is this JE Labs based pre, my daily driver. Gaskets for the tube sockets, shielded input and output wiring, lotsa chokes and careful shoe-horning of the circuit into the smallish chassis did the job.
Edits: 08/31/16
Best arrangement is to hook the ground wire from the SUT ground connection to the phono preamp ground (where you attach your tonearm wire ground). It may not solve the problem, but is easy and cheap enough to try. I'd use a decent gauge of wire (18 gauge or heavier) rather than a "thin" wire.
NT
you need to have two, two conductor shielded tonearm cables with a separate ground wire.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
A Danish "SUT", Plugged in and earth grounded
I am no expert, and my experience is limited in that over the decades my pre-amps have all had built-in phono stages, but a wire from sut to pre-amp ground usually (but not always -- the exception was an early Bryston sut) has worked for me That said, I'm not sure you can hurt your system by trying different arrangements, especially if you start low and bring the volume up gradually to check for hum.
Good luck,
Jeremy
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