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LP12 Hum

I just received an LP12, & am new to higher end audio.  When I hooked it up last week, it started humming.  The hum gets louder when I touch the tonearm. LP12 Hum 

This is my system:

Naim Flatcap 2
Naim Nait 5
Naim Stageline N
Linn LP12 Sondek with Rega RB300 tonearm & AT440ML cartridge

Before the LP12 I had a Pro-Ject Debut Carbon EVO with a Sumiko Ranier cartridge.  The system was silent then.  So, I'm pretty sure that the problem is with the LP12, & not the amplifiers.  I did check the grounding this morning, & they seem to be firmly in place.  If I disconnect the tonearm cables from the phono stage, the hum goes away.

Please advise.

theexaltedarchduke

Showing 3 responses by theexaltedarchduke

theexaltedarchduke OP
8 posts
 

I don’t see any ground wire from the tonearm.

theexaltedarchduke OP
8 posts
 

I'm pretty sure I figured out the problem, but my electrical skills are too lacking to fix it myself.  It was the internal wiring of the tonearm.

theexaltedarchduke OP
8 posts
 

I say that, because when I pulled the base plug out of the screw shaft, none of the wires were attached.

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