Ground Loop?

Thanks, I'll give that a try in the AM 9 930 I'll give that a try in the AM tomorrow I got to get some sleep I was up with it all night trying to fix this till around 430 am EST. and iy's 1030 now.

I tried with only the 2 pieces hooked up, nothing else just the Moon 350P preamp and the JC3 Jr phono preamp plugged directly into the dedicated 20 A line. Using 4 different pair of balanced or unbalanced connectors makes no difference. I hated doing this with full intention of returning it, but I ordered a less expensive MM/MC preamp, and it does the same thing too. It's like I'm cursed on vinyl playback.

I have 2 pr. of Cryo-treated watt gate receptacles wired direct to fuse box. It never had this problem before it just kind of creeped in slowly and it can be heard in segways and quiet portions of the music. 

Thanks for the info. When the outlets were installed, I used in wall 20 gage AQ power wires. I've lifted the ground on both and individually with adapters. I even had the 350P or the JC3 Jr hooked up to a regular outlet, 2 completely different lines and lifted the ground on 1 or both in different configurations. 1 using the dedicated line and a standard wall outlet So, it's not the outlets. Still there, but again when I reach back on the JC3 Jr and when I touch the loading pot and only the pot it goes away. When I do touch the pot, the noise slowly fades away. I've been in touch with David and Jason at Parasound via email, and they stopped communicating with me and won't answer any questions or offer any kind of help.

I want to thank everyone for their input. It’s not 20 gauge now that I think more about it, it was done 12 years ago and the 10 gage sounds more familiar. The wire was made for this application. I had an electrician install the wire, breakers and receptacles to code. The run is only about 10-15 feet at most. Even so I plugged 1 at a time into a regular receptacle, 1 in the dedicated line and 1 in the regular socket then both with no change. So, I don’t think it’s in the dedicated receptacle and another regular outlet do the same thing. I’ll get my neighbor to check ground and stuff, he knows more about A/C than I do.

One of my friends is a retired electrician and I'm going to get him to give the A/C line a go over. I also ordered a ground loop eliminator from Amazon a Btuty Buzz, if it doesn't work, I'll send it back.

Thanks everyone for the input. I have a friend that used to be licensed but now retired to give it a go over. I'll post this Sunday if that device worked and if my friend has time to take a look at it.

I kind of fixed it, no help from Parasound, but if I take a small piece of wire with a spade lug and slide it under the pot and connect it to the ground it goes away. I've never heard of such a thing it's not a hum but a chattering noise with static. Parasound has had it twice with no problems found. I've never spent so much money on something that's under warranty and the total lack of help is ridicules. Buyers beware.

I don’t understand why that works either, but I took a 4" piece of wire attached 2 spade lugs, 1 slid tight behind the loading potentiometer located on the back of the unit and connected the other end to the phono ground lug and the noise slowly dissipates. It’s screwy too that the noise cancelation points seem to move too. It was only when I touched the gain toggle now it moved to the pot. Totally unbelievable I have no explanation for any of this it just crept in and now prevents me from listening to any vinyl. 5 different A/C cords, dedicated lines, Audience Forte V-8 power conditioner, plugged into other outlets not connected to dedicated lines, lifted grounds, Ground Hum eliminator and even cocked my head to the left. EVERYTHING in front and behind has been replaced, swapped, moved and tested. This has been going on for almost 8 months with all the shipping times and at least $700 in various shipping and services of TT and this preamp numerous times with no results other than a lighter wallet and an extreme migraine. Trying to download a picture but I’ve never done this here but the lay out is pretty simple. You have 2 toggles with the pot in between the 2 switches and ran it to its own ground lug, not a wall ground that does nothing I’ve tried that too. I’ve unplugged just about everything in the house other than the refrigerator and the house A/C, no new nothing installed. I did notice that when using a multi meter, both toggle switches and the pot don’t show ground continuity that all the other connections have at their bolts on their basses, I didn’t know if that’s normal or should be? And again, it’s not a hum, it’s a tapping staticky popping noise similar to the sound of a motor, thud, thud thud, with a slight popping sizzle sound in the background and so on. I’ve never heard of this type of noise before. STRESSED!!!

The potentiometer knob is plastic but with the spade or actually a U clip lug tucked up between and under it, and it kind of wraps around the metal post of the knob. So, what I’m doing is grounding the potentiometers metal post. It’s been to service twice and shipping isn’t free. Closest Parasound service center is over 200 miles away. The last I heard from Parasound was over 9 days ago and just said fill out the form again for an RMA said ship it to us. Both times they said they replaced the power supply and found no other problem. Shipping isn’t free and with today’s economy it’s twice what it cost before. I already could have bought the JC3+ instead. I can't sell something I have suspicions about or just take a total dump on it. It least that worked for now and so maybe my ulcer will settle down.