CageyH
Senior Member

Looking back on everything I have done, the only time the phono stage has been dead quiet was with the AG1500 providing the power. This would suggest...

The 5G mast is 1.4km from my house.

Yes, self built on a blank BB3 PCB. Siemens PCC88 x 2 New production Tesla ECC803S gold pin. I may be kicking myself later…. And your comment...

To be honest, I am losing track of what I have done…. With a SS phono, there is no noise. With my hybrid phono, there is now a slight noise.

Silence….. I have found the source.

I have now swapped out my Phono stage, only thing left to do really.

Thanks Adrian. I shall investigate further. I have already replaced the TP60e with a big standard unit. No difference. This morning, I have...

Thanks Jim. I had a listen to a lot of it. Most things I have already tried, but thanks for thinking of me.

I have tried earth straps from the different equipment, and nothing seems to change it. I have done some extreme cable dressing, which I never...

I think it could be an earth loop problem. Probably related to the SL1200 power supply, linking in to the arm, feeding the phono stage, and in turn...

However, sometimes the simplest solutions are the best, and I don’t know why I did not think of this yesterday. Just disconnect the grounding...

An aircraft does not electrocute you, and that is an ungrounded faraday cage.

From a quick Google. I had this argument with Richard Dunn, but I was arguing that a Faraday cage needed to be grounded. Apparently, it does...

It could well be. I have just built a TT grounding cable with a floating shield. So far, so good, but it has only been plugged in for 10 minutes.

:lol: That would certainly fix the issue. It is a bit extreme though.

Worst case, I could have a fly lead going to mains earth, but the idea of a shielded grounding cable - :mental: I think there is a mobile phone...

Last night, and so far this morning, there is a very faint buzz. Almost like the RFI is trying to break through, but can’t quite manage. It would...

:lol: For 7k, I could rewire my house, and if you change the cable on the Chord, you can add another 1.5k :rfl:

It turns out that the USB cable was not the culprit, even though I thought it was. So, I bought an iFi iPurifier for the mains. It did nothing so I...

Thanks for the links and information The male IEC was needed as part of my “buzz busting” search. Fortunately, I have found the source and the male...

Did you spin your platter at the exact same speed? Are the ruble figures different?

I forgot it was still plugged in, to be honest. I do have one going from my PC to the DI, but that is fine.

That is why I made some using a good quality coax cable, as advised by a respected phono stage designer.

I think I may have cracked this. At long last, I hear you say. My system has been on for an hour since I changed something. Before the change, I...

The only leads I have not swapped out in my system are TT to Phono. I may try these tonight, but I still think it is mains related.

I have ordered an iFi AC Purifier to see what that does, and if it has a negative effect, I will send it back. An isolation transformer could be a...

Can a ground loop be intermittent?

Thanks Grant. That looks interesting. I think I have a temporary fix. I connect just the BB3 to the AG1500, so it is silent when I listen to...

So how does the AG1500 fix the ground loop/faulty equipment? The system is silent with the mains regenerator in place, which is more than can be...

It is not the heating, so I have noise on the mains. It is not DC. It is not the power line network adapters. I don’t think I will ever find out...