Humming WAD Phono Series II Clone Question

[lt_texan]

I scratch built a WAD Series II phono stage ages ago. I modified it with a ccs on top of the first stage and a ccs below the CF out. I really love it.

But when I turn it up, it does like to make some hum. Attached is a picture of of my iPhone showing hum at 47db when the volume is turn way up. This is very noticeable between tracks or during quiet passages, but hey I've lived with it for years. But mostly not noticeable over my wife's screams of "turn it down!"

Well, I tried something new. I unplugged the turntable leads and replaced them with RCA with 100k ohm resistor grounded as in the picture.

The hum dropped very noticeably. See the next picture at 35db.

Does this mean I'm getting noise in from my turntable?

I can't find any obviously wrong grounding practice in the preamp. (And both the phono and pre are in one box, the pre-amp stage is nice and quiet.)

Any comments would be most appreciated.

Thanks,
Dan

 

[lt_texan]

The leads from the TT are picking up 60hz AC hum from a power cable.

 

[PRR]

The leads from the TT are picking up 60hz AC hum from a power cable.

Yes. Did you fix this? Moved cables? Check grounding-wire?

 

[lt_texan]

Yes I did! Rearranged the position or the preamp closer to my turntable. And repositioned the leads away from any AC. Now switching between phono and other inputs has barely noticeable hum differences.