I have only come here seeking knowledge...

I’m sorry, I meant platter. Far as I can tell, it’s made of aluminum but was hollow on the bottom. 

That was the first thing I checked. I remember a lighter hum after starting the plate and between tracks, but surprisingly it went away after maybe 70/80 hrs. of use. The only thing that’s changed, I moved my audio equipment to the basement a couple of months ago since my youngest son’s bedroom and den’s been empty since he left for college. That’s been fourteen years! We’ve been using the bedroom for guests, so I took over the then. Humidity is not a problem, and the dehumidifier noise is well isolated. One thing I should mention, during the run in period, I replaced the OEM rubber mat with one made of cork, and applied foam insulation to the void in back of the plate. IDK if that helped with the original hum, or it was the run in period that eliminated the hum. 

Thanks. I just tried that so it wouldn’t be on my mind. I was lucky that the general contractor, (must’ve been an electronics junkie like me😎), suggested separate breakers for areas where I pictured electronics placed. He also installed a breaker box with eight extra breaker slots for when I finished the basement. Don’t laugh, but I’m using a tv antena installed in the attic in 1994 for the tv in our bedroom (1080p/Fire stick) and the tuner in the basement. About thirty miles across the lake from Chicago and great reception!

No. The only things plugged into a power strip are the tv, bp, pc and the tuner. That outlet is on a different breaker. One thing is certain, I have more faith in the wiring than the ttl. As long as it doesn’t interfere with the music, it’ll be good. I’m going to take it and the preamp upstairs and digitize a couple of records, see if it does it upstairs. 

I used expanding insulation and trimmed it even with the bottom when it dried. As far as electrical, I used to have a large tv with a 5.1 system years ago where I have my audio things now. Never experienced anything similar. Mitsubishi tv, Pioneer Elite processor, Klipsch speakers, several dvd and bp players. 

1 Stereo int. Amp on one double outlet by itself (breaker 1 original build)
2 TTL & phono stage on double outlet (breaker 2 when basement finished). One led light for recess where eqp’t is), no dimmer)
3 CD player & tuner (now) on double outlet (breaker 1)
4 PC, TV & BP ON power strip connected to outlet on breaker 3. Shared with irrigation system which runs at 5 am M,W & Th. I will try amp, phono stage & ttl only with a different ground wire, and if successful, add things at a time. Will report when done. Thanks!

I feel foolish and embarrassed to say the least, rather than publish a string of expletives on this site. I removed the OEM ground wire from the ttl to the phono stage and replaced it with a single strand of 14 gauge speaker wire. Since I had not disconnected anything yet, I put an LP (Gaby Moreno’s Ilución) on the table and tried it. Magic!!!  No foreign noise!  Upon eyeballing the wire, I couldn’t see anything wrong. I’ll inspect it later under a magnifying glass lamp. I’d like to thank each anybody else that took time out of what your, what are very busy schedules to help me. Again, thanks. 

IDK if there’s any retirees here, but It seems that I, for one, let tools like PDCA, root cause analysis go out the window when I retired. 😂

I agree. In my excitement, I didn’t take the time to articulate a decent post. Here’s some background. Two months ago, I got the idea of moving my stuff to what was my youngest son’s den/study room before he left for college. Since then we’ve used the spare bedrooms for when family or guests come. The den is furnished and always had a tv. I got rid of the old 5.1 processor, and the speakers some time ago. The audio things I brought up played great until a week, week and a half ago when the turntable started acting up. The ground wire will have to wait until I have time to find if in fact it’s damaged. 
The only other thing I can think of, is I wanted a pair of stander speakers instead of dragging the floorstanders to South Texas for the Winter. First, I tried a pair from Monitor Audio. One had very little sound out of the bottom driver. In fairness, the carton had some damage when it arrived. Second, I went with the Q Acoustics Concept 20s. Although that box arrived in good shape, the bigger driver was blown as far as I’m concerned. Very loud static. On both sets, I switched the speakers to the other channel to verify it wasn’t my equipment causing it. I even hooked up my floorstanders and they played perfectly. Dug up the surround speakers from my old Klipsh set, and beside not having any bass to speak of, they worked. When  the Q’s were returned, I replaced my home made speaker wires with two pairs of SVS SoundPath speaker wires. I suspect that I either damaged or disturbed the fragile ground wire on the turntable while switching speaker wires, because after doing so I got two new LPs and played them through the floorstanders. That’s when I noticed this issue. Today I received the Wharfedales and sound great right out of the box. Even the LP I played today after replacing the ground wire. 

🤣

You know it!  I’d still be working if my body could take Winters in NW Indiana!

I’m happy you solved what I think was a much complex problem than mine. I’m curious, was your investigation of the issue a long and arduous one?

It’s noon somewhere in this Earth

😇 🍺

My apologies for mentioning this earlier. I will certainly try that. I’ll see what’s in the market. Of course, I’d certainly appreciate suggestions if anyone can afford the time. Thanks. 

asvjerry, THAT would be a climb. Nah, I always had trouble with the coach light at the curb, I was lucky to get a month out of a light bulb. I bought an led bulb for it over five years ago and it’s still going. That motivated me to switch the whole place to led. To my surprise, My face does not appear orange in photos 🤣. Don’t want a Finnish basement, too lazy to learn a third language...

Haven’t got around to really inspecting the OEM ground wire. It’s very thin and I wouldn’t be surprised the spades are just plain mild steel. I think it was either corrosion and/or I disturbed/damaged it when I changed the speaker cables. I guess that’s what I get for trying to save time?

Along those lines, Since the early 70s, I’ve always used the same kind of RCA interconnects I use between a tape deck and tuner to the line inputs on the connections between a turntable and phono input on my integrated amps, or, in this case the input on the phono preamp. Now I read that I should use a low capacitance audio cable. Any advice?

Finally!

Wow! I’ve thought about going that route with ground wires, although I haven’t done it yet. Many moons ago, that was the only way I had to do run the ground to the receiver I had at the time. My CXA60 doesn’t have phono input. Would it be worthwhile to run a ground from the phono preamp to the CXA60, or would it somehow have a negative effect on sound?
I’m sure you both will enjoy the new Dylan LP. The only Dylan vinyl I have this time around, is his Gretest Hits from 1967 that I bought used. That was a steal! Once I played it the first time, I digitized it at 96kHz/24bit, storage is cheap. I carry my “library” in the vehicles on thumb drives as mp3 converted to 44.1kHz/ 320kbps which more than enough for me. I’ve had good experiences with used vinyl and CDs I’ve bought. I’m waiting on Evie Sands’ CD “Women in Prison.”  The only place I could find it was in the UK. The price on “A” is outrageous!