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Re: Long-term investigation of unstable input
Posted: 21 Sep 2026, 12:40
by cybepine
fa1kk wrote: ↑20 Sep 2026, 15:11
Small update:
Since I started investigating this, the transformer feeding my house has now been replaced four times.
The first three were on the same feeder. The newest transformer, which was installed in September 2026, has a Y/Zn winding and is brand new, having been manufactured in May 2026; prior to this, I had Y0 transformers.
This time, basically everything around the supply changed:
1) New transformer, around 2× closer to my house;
2) Different 35 kV substation;
3) Completely new 70 mm² line, with the last 20 m being 16 mm²;
4) Only around 5-7 houses on this new line;
5) Completely new cables and connections.
So the transformer, feeder, grounding, and upstream supply are all basically new.
And all of that changed nothing.
I also completely disconnected the house wiring and powered the PC through a separate line after the meter. I tested it both with my PE and without it. The overall problem remained.
And if there is anyone who has any ideas, I would appreciate any useful ones.
Anything related to the body, sweat, software-based, PC, BIOS, monitor, health issues, or perioperative stuff will be ignored completely.
Earlier you wrote this:
One thing that caught my attention is that several neighbors have deep water wells (around 90 meters) with submersible pumps. There are also a few houses with three-phase service and solar inverters. The electric boilers are probably irrelevant, but the water pumps operate year-round.
Could this be your source of the problems?
All of these 3 things can cause problems and it is always the best way to remove the source or add some emi suppression to these equipment.
I found this (ferrite mix 75):
https://palomar-engineers.com/ferrite-c ... p135607443
"DAVID F.
BRUCTON MILLS,
United States
Jun 27, 2025
After installing a tankless hot water heater 90% of the lights in our house flickered so badly it was almost strobe like. I tried replacing the dimmers and lights with some success but still every time you would turn on the hot water the lights would flicker. I installed these items on the Romex going to the tankless heater as well as the individual lines inside tankless heater housing and have all the eliminated flickering. Great product great support staff thank you for all the help David Friend"
Re: Long-term investigation of unstable input
Posted: 21 Sep 2026, 12:52
by astroasis
Have you guys tried moving your setup further away from your wall outlet?
Re: Long-term investigation of unstable input
Posted: 21 Sep 2026, 14:02
by fa1kk
cybepine wrote: ↑21 Sep 2026, 12:40
One thing that caught my attention is that several neighbors have deep water wells (around 90 meters) with submersible pumps. There are also a few houses with three-phase service and solar inverters. The electric boilers are probably irrelevant, but the water pumps operate year-round.
Could this be your source of the problems?
All of these 3 things can cause problems and it is always the best way to remove the source or add some emi suppression to these equipment.
4-5 years ago, there was not a single neighbor with deep water wells with submersible pumps. And the problem was still there.
astroasis wrote: ↑21 Sep 2026, 12:52
Have you guys tried moving your setup further away from your wall outlet?
Yes, and there is no difference.
Re: Long-term investigation of unstable input
Posted: 21 Sep 2026, 14:54
by cybepine
fa1kk wrote: ↑21 Sep 2026, 14:02
cybepine wrote: ↑21 Sep 2026, 12:40
One thing that caught my attention is that several neighbors have deep water wells (around 90 meters) with submersible pumps. There are also a few houses with three-phase service and solar inverters. The electric boilers are probably irrelevant, but the water pumps operate year-round.
Could this be your source of the problems?
All of these 3 things can cause problems and it is always the best way to remove the source or add some emi suppression to these equipment.
4-5 years ago, there was not a single neighbor with deep water wells with submersible pumps. And the problem was still there.
astroasis wrote: ↑21 Sep 2026, 12:52
Have you guys tried moving your setup further away from your wall outlet?
Yes, and there is no difference.
And do have any high amperage draw equipment near you? Like I earlier wrote such as electric tankless water heaters?
Is is possible to cut temporarily your coax cable at the point entry and then test your problems without electricity on and off (at the breaker panel)?
Does the problems still persist?
Other than that I don't have any more ideas...
Re: Long-term investigation of unstable input
Posted: 21 Sep 2026, 16:47
by astroasis
cybepine wrote: ↑21 Sep 2026, 14:54
fa1kk wrote: ↑21 Sep 2026, 14:02
cybepine wrote: ↑21 Sep 2026, 12:40
One thing that caught my attention is that several neighbors have deep water wells (around 90 meters) with submersible pumps. There are also a few houses with three-phase service and solar inverters. The electric boilers are probably irrelevant, but the water pumps operate year-round.
Could this be your source of the problems?
All of these 3 things can cause problems and it is always the best way to remove the source or add some emi suppression to these equipment.
4-5 years ago, there was not a single neighbor with deep water wells with submersible pumps. And the problem was still there.
astroasis wrote: ↑21 Sep 2026, 12:52
Have you guys tried moving your setup further away from your wall outlet?
Yes, and there is no difference.
And do have any high amperage draw equipment near you? Like I earlier wrote such as electric tankless water heaters?
Is is possible to cut temporarily your coax cable at the point entry and then test your problems without electricity on and off (at the breaker panel)?
Does the problems still persist?
Other than that I don't have any more ideas...
Good point about the coax cables. I'll try this week to unconnect them
Re: Long-term investigation of unstable input
Posted: 21 Sep 2026, 17:48
by unexpected8
I have a severed coaxial cable point next to a power outlet; could that cause any issues?
https://h.top4top.io/p_3916ly2w60.jpg
Re: Long-term investigation of unstable input
Posted: 21 Sep 2026, 18:51
by astroasis
Could be. I heard they can act as antennas for emi
Re: Long-term investigation of unstable input
Posted: 22 Sep 2026, 04:23
by MK92
Do not waste 90$ for bullshit ferrite cores linked above, this will NOT fix your problems because the problem is low-frequency noise, not high frequency.
You would need something that would fix 10-40 khz noise, not ranges from 150+ khz to 10 mhz, but this doesn't exist at consumer level.
Re: Long-term investigation of unstable input
Posted: 22 Sep 2026, 10:08
by astroasis
The issue is more so on the monitor side imo, the pc psu handles things fine. For example why would multiple devices like laptops without gpus, consoles etc all have the exact same blurry display on multiple TVs and monitors? Case and point being my monitor plugged into my online ups in conversion mode provides the greatest relief above all other attempts of fixes.
Re: Long-term investigation of unstable input
Posted: 22 Sep 2026, 13:38
by kimchi man
MK92 wrote: ↑22 Sep 2026, 04:23
Do not waste 90$ for bullshit ferrite cores linked above, this will NOT fix your problems because the problem is low-frequency noise, not high frequency.
You would need something that would fix 10-40 khz noise, not ranges from 150+ khz to 10 mhz, but this doesn't exist at consumer level.
A lot of people are wondering what exactly is causing this problem. I’m one of them as well.
I’ve been assuming that the problem is somehow related to the power supply or electrical environment, but I still don’t know exactly which aspect of the power system could be responsible.
You mentioned that low-frequency noise might be the cause of the problem. Could you explain that in a little more detail? I’d be interested to hear more about what you mean and how you think it could cause this issue.
