Hi Ivar, It sounds indeed like a ground issue so it is good to check if the ground from the amplifier(s) is connected to the earth ground of your house in the junction box (stoppenkast). What also could be a problem especially with tube amps is maybe your pre-amp output resistance (load) is not a good match for the power amp input...
Hello! I am an electronic technician and I have built a few amplifiers in my life. The noise you hear is from inside the power amplifier power source. It may be a faulty capacitor. It is not from the power line of your home and it is not from the PWM power source of your other equipment.
I think one or more of the tubes has become microphonic. I have the same amp. I would switch the tubes between the right and left channels to see if that makes a difference and / or you can identify the impacted tube(s). What type of light bulb do you have in the ights? The light reflectors may be focusing the energy from the bulb at the microphonic tubes. Try turning the lights on but have them facing away.
Hi, thanks for watching 👍 The studio lights make it more apparent, but the noise is also present when I don’t use the studio lights. And It is on both channels so changing tubes won’t work. Apart from the KT88 tubes all tubes have been replaced now. So I’m still not sure what causes this 😡 Anyways, tell me please, what other gear are you using with your PrimaLuna? I really do like the sound.
@@theaudiophilebarista2424 For speakers I have Zu Audio and Klipsch La Scalas. I use a Audible Illusions tube preamp. My digital front end is an Innuos Zen into a Chord Qutest. Analog front end is an Mofi Ultradeck with a Hana ML cart into a iFi phono preamp. I really like being able to change the tubes and that the amp is very, very easy on tubes. The only downside is the tubes don't glow as much as you might like. Everything in plugged into an AudioQuest Niagara 1200. All cables are Cardas.
Heb hetzelfde probleem hier. Merk dat als ik mijn speaker kabel tegen de muur hebt liggen dat de storing gaat komen. Alles is vervuiling. Buren hebben ook de spullen aan en iedereen heeft wel een mobieltje. Mijn primaluna is daar wat gevoeliger in. Geen oC killer. Heb flink wat upgrades gedaan in stroom en binnenkort een audioquest 1200. Heb ook vanaf het begin een dedicated stroom aanvoer gedaan vanaf de meterkast. En ook ik zit in een flat. Hoop in mijn laatste stap de storing ook weg te houden ook al lopen mijn speaker kabel langs de muur. Hoop dat je hier wat aan hebt net mijn verhaal. En die lampen zijn led lampen. Een van de grootste vervuilers Zo af en toe hoor ik tussen die brom ook radio geluid. Alles komt van buiten af. Maar voor mij alleen de rechterkanaal. Heb alle buizen omgedraaid maar bleef zo. Dan heb ik mijn luidspreker kabel helemaal voor de rechter speaker omgeleid en was mijn brom bijna weg en soms ook helemaal weg. In triode stand is de brom ook definitief weg.
Looks like a ground problem but it could be DC contamination too. Try using a DC filter like the iFI DC Blocker. Some amps have an internal DC blocker and others do not... maybe the PrimaLuna doesn't have one.
It does sound like a ground problem, but it is gone when I change the Primaluna for the Audion (keeping all cables the same). I do have some DC blockers. I will try those. Thanks man 👍
I couldn't see very well but it looks like at least some of your cables are homemade. If so, make sure your speaker cables are not shielded. Its a common mistake for DIY cables. Unless the shield is grounded properly, it can actually cause problems. So, if you have shielded speaker cables, I would try something different.
1 st try touching the case of each device in use while its on do you have sound diffrence ,if you do you know the source then you need to ground the unit by putting an ac line filter on its input and grounding the chasis . 2 possible rf pick up over long speaker wire try clamping ferrite beads on the wire 3 possible interfereance due to switching power supply near by try unplugging and check,,mobile chargers etc
Hi, thanks for watching 👍 1. I will try that definitely 👍 Maybe it’s one of the other devices indeed. 2. Not sure. The cables are not that long plus this Oyaide cable is actually a shielded loudspeaker cable (not many of those around). 3. Currently I have all the switching power supplies behind a isolation transformer (a recent experiment) but I will definitely do this one too. Great stuff. Thanks
Sounds like 100 Hz hum usually is a grounding issue, it could be a grounding issue somewhere else on your circuitry not the dedicated line, You need to check your ground and see what resistance you get on all your sockets shouldn't be no more than 5 ohms, If it is then that's the culprit. A piece of equipment somewhere else in the apartment like switch my power supply could be a issued Go around and pull out one piece of equipment at a time round your place see if that sorts out the problem usually fridges and air conditioning freezers are an issue culprit. On the plug connect a X2 capacitor of 1uF to 10uF this will add a filter to the appliance and cut out the hum try 1uF should usually enough If not completely gone try 2uF to 10 uF. when you say dedicated line is that sharing the conduit with other power cables or it isolated in a metal conduit? What's earth. Main lines running together can introduce voltage in the neutral and earth. Make sure all your hi fi equipment isn't separated earths you'll get earth loop what can cause hum connect all earth to a single point and don't share earth especially with vinyl.
Thanks for watching 👍 That is a lot of good information, but I need an electrician for that because I will probably electrocute myself. But as I said in the video, I fear it is something deep in the system so I guess I need to find someone who can help me with that. Great stuff. Thanks 👍
@@theaudiophilebarista2424 unplug appliances around the apartment don't need specialists for that 😃 just try that for now start off in the kitchen with fridges
Hi, thanks for watching 👍 It only became more apparent after setting up the studio lights. It was already there without any of the studio lights unfortunately 🫤
Could be a cable? I was getting a noise like that from a CD player, and I changed the RCA cable and it went away. Bad RCA cable. I also had noise from my receiver at one point. I changed the power strip that my stereo and other components were plugged into and it went away. You might try unplugging the two connections on the side of your stereo at the dedicated power line, and try plugging them into a power strip then plugging it into the power line. When I had the receiver plugged straight into my power line I would also get noise. The power strip solved the problem.
Thanks man, I guess I have to unplug everything and reconnect things one by one until the noise appears again and then see if any of the things you said helped. Thanks for the input 👍
Hi, thanks for watching 👍 Well, it’s not ONLY with the PrimaLuna. The amp was checked and by a respectable high end show just 6 months ago. It wasn’t used for a long time so they checked it and replaced some things (not sure what) and said it was okay now. So it still could be the power supply, but some of that ground noise is always in the system. So it could be at multiple places 🤷♂️
@@theaudiophilebarista2424 Sorry, I watched again and realised I'd missed the fact that you mentioned it was always present , so, yes it does sound like it's got something to do with the house electrics and ground connection. Do you know any electricians that have a "megger" as we call them here in UK as that would give you an instant value of the whole house system ground resistence. Hope that's helpful.
@@theaudiophilebarista2424 If I remember correctly, it's a device that discharges a huge voltage thru the whole system and measures the resistence to earth. I think you have to disconnect everything in the house before you do the test,or-BANG!. I installed an external earth for my system years ago and got my mate to check it. My earthing system measured about 1 ohm compared to the house mains of about 5 ohm-old house...
Hoi ivar. Wat rot dat dit probleem optreedt. Wel raar dat het hebt met de prima Luna en niet met de audion. Ik denk dat het probleem zit in de prima Luna versterker zelf. Anders zou je het ook moeten hebben met de audion. Ik hoop dat je het gauw opgelost krijgt. Gr André de vries.
Earth problem, so start by pulling your connections on your main amp first. I have had this happen it's bad earth from your mains I had to spend a lot of money on big thicker cables upgraded all power boards.
Hi, thanks for watching 👍 Turning the power cord was actually one of the first things I tried. No effect. I still have to use a power cord without the ground tho. I will try that in the coming days 👍
Hi Ivar, It sounds indeed like a ground issue so it is good to check if the ground from the amplifier(s) is connected to the earth ground of your house in the junction box (stoppenkast). What also could be a problem especially with tube amps is maybe your pre-amp output resistance (load) is not a good match for the power amp input...
Definitely sounds like a ground problem. Hope you have success with the blocker. Best of luck lhope you find a solution. Best Wishes Terry uk 🇬🇧 ❤.
Hello! I am an electronic technician and I have built a few amplifiers in my life. The noise you hear is from inside the power amplifier power source. It may be a faulty capacitor. It is not from the power line of your home and it is not from the PWM power source of your other equipment.
Dedicated lines in the US still have a shared ground. Maybe your issue is something similar.
I will have to find someone to check that out. Thanks for the input 👍
I think one or more of the tubes has become microphonic. I have the same amp. I would switch the tubes between the right and left channels to see if that makes a difference and / or you can identify the impacted tube(s). What type of light bulb do you have in the ights? The light reflectors may be focusing the energy from the bulb at the microphonic tubes. Try turning the lights on but have them facing away.
Hi, thanks for watching 👍
The studio lights make it more apparent, but the noise is also present when I don’t use the studio lights.
And It is on both channels so changing tubes won’t work.
Apart from the KT88 tubes all tubes have been replaced now. So I’m still not sure what causes this 😡
Anyways, tell me please, what other gear are you using with your PrimaLuna? I really do like the sound.
@@theaudiophilebarista2424 For speakers I have Zu Audio and Klipsch La Scalas. I use a Audible Illusions tube preamp. My digital front end is an Innuos Zen into a Chord Qutest. Analog front end is an Mofi Ultradeck with a Hana ML cart into a iFi phono preamp. I really like being able to change the tubes and that the amp is very, very easy on tubes. The only downside is the tubes don't glow as much as you might like. Everything in plugged into an AudioQuest Niagara 1200. All cables are Cardas.
Heb hetzelfde probleem hier. Merk dat als ik mijn speaker kabel tegen de muur hebt liggen dat de storing gaat komen. Alles is vervuiling. Buren hebben ook de spullen aan en iedereen heeft wel een mobieltje. Mijn primaluna is daar wat gevoeliger in. Geen oC killer. Heb flink wat upgrades gedaan in stroom en binnenkort een audioquest 1200. Heb ook vanaf het begin een dedicated stroom aanvoer gedaan vanaf de meterkast. En ook ik zit in een flat.
Hoop in mijn laatste stap de storing ook weg te houden ook al lopen mijn speaker kabel langs de muur.
Hoop dat je hier wat aan hebt net mijn verhaal. En die lampen zijn led lampen. Een van de grootste vervuilers
Zo af en toe hoor ik tussen die brom ook radio geluid. Alles komt van buiten af. Maar voor mij alleen de rechterkanaal. Heb alle buizen omgedraaid maar bleef zo. Dan heb ik mijn luidspreker kabel helemaal voor de rechter speaker omgeleid en was mijn brom bijna weg en soms ook helemaal weg. In triode stand is de brom ook definitief weg.
Looks like a ground problem but it could be DC contamination too. Try using a DC filter like the iFI DC Blocker. Some amps have an internal DC blocker and others do not... maybe the PrimaLuna doesn't have one.
It does sound like a ground problem, but it is gone when I change the Primaluna for the Audion (keeping all cables the same).
I do have some DC blockers. I will try those. Thanks man 👍
I couldn't see very well but it looks like at least some of your cables are homemade. If so, make sure your speaker cables are not shielded. Its a common mistake for DIY cables. Unless the shield is grounded properly, it can actually cause problems. So, if you have shielded speaker cables, I would try something different.
1 st try touching the case of each device in use while its on do you have sound diffrence ,if you do you know the source then you need to ground the unit by putting an ac line filter on its input and grounding the chasis .
2 possible rf pick up over long speaker wire try clamping ferrite beads on the wire
3 possible interfereance due to switching power supply near by try unplugging and check,,mobile chargers etc
Hi, thanks for watching 👍
1. I will try that definitely 👍 Maybe it’s one of the other devices indeed.
2. Not sure. The cables are not that long plus this Oyaide cable is actually a shielded loudspeaker cable (not many of those around).
3. Currently I have all the switching power supplies behind a isolation transformer (a recent experiment) but I will definitely do this one too.
Great stuff. Thanks
Sounds like 100 Hz hum usually is a grounding issue, it could be a grounding issue somewhere else on your circuitry not the dedicated line, You need to check your ground and see what resistance you get on all your sockets shouldn't be no more than 5 ohms, If it is then that's the culprit.
A piece of equipment somewhere else in the apartment like switch my power supply could be a issued Go around and pull out one piece of equipment at a time round your place see if that sorts out the problem usually fridges and air conditioning freezers are an issue culprit. On the plug connect a X2 capacitor of 1uF to 10uF this will add a filter to the appliance and cut out the hum try 1uF should usually enough If not completely gone try 2uF to 10 uF.
when you say dedicated line is that sharing the conduit with other power cables or it isolated in a metal conduit? What's earth. Main lines running together can introduce voltage in the neutral and earth. Make sure all your hi fi equipment isn't separated earths you'll get earth loop what can cause hum connect all earth to a single point and don't share earth especially with vinyl.
Thanks for watching 👍
That is a lot of good information, but I need an electrician for that because I will probably electrocute myself.
But as I said in the video, I fear it is something deep in the system so I guess I need to find someone who can help me with that.
Great stuff. Thanks 👍
@@theaudiophilebarista2424 unplug appliances around the apartment don't need specialists for that 😃 just try that for now start off in the kitchen with fridges
Do your studio lights have a power supply? Did you try unplugging it?
Hi, thanks for watching 👍
It only became more apparent after setting up the studio lights. It was already there without any of the studio lights unfortunately 🫤
Could be a cable? I was getting a noise like that from a CD player, and I changed the RCA cable and it went away. Bad RCA cable.
I also had noise from my receiver at one point. I changed the power strip that my stereo and other components were plugged into and it went away. You might try unplugging the two connections on the side of your stereo at the dedicated power line, and try plugging them into a power strip then plugging it into the power line. When I had the receiver plugged straight into my power line I would also get noise. The power strip solved the problem.
Thanks man, I guess I have to unplug everything and reconnect things one by one until the noise appears again and then see if any of the things you said helped.
Thanks for the input 👍
So it's only noisy when the Prmaluna's plugged in, and its coming thru both channels,sounds like the power supply needs checked.
Hi, thanks for watching 👍
Well, it’s not ONLY with the PrimaLuna.
The amp was checked and by a respectable high end show just 6 months ago. It wasn’t used for a long time so they checked it and replaced some things (not sure what) and said it was okay now.
So it still could be the power supply, but some of that ground noise is always in the system. So it could be at multiple places 🤷♂️
@@theaudiophilebarista2424 Sorry, I watched again and realised I'd missed the fact that you mentioned it was always present , so, yes it does sound like it's got something to do with the house electrics and ground connection. Do you know any electricians that have a "megger" as we call them here in UK as that would give you an instant value of the whole house system ground resistence. Hope that's helpful.
@@alistairwilson5344 Yes, that is absolutely helpful. I'll try to find out what a megger is 😉
@@theaudiophilebarista2424 If I remember correctly, it's a device that discharges a huge voltage thru the whole system and measures the resistence to earth. I think you have to disconnect everything in the house before you do the test,or-BANG!. I installed an external earth for my system years ago and got my mate to check it. My earthing system measured about 1 ohm compared to the house mains of about 5 ohm-old house...
Hoi ivar.
Wat rot dat dit probleem optreedt.
Wel raar dat het hebt met de prima Luna en niet met de audion.
Ik denk dat het probleem zit in de prima Luna versterker zelf.
Anders zou je het ook moeten hebben met de audion.
Ik hoop dat je het gauw opgelost krijgt.
Gr André de vries.
Ja, balen. Ik denk eigenlijk dat er meerdere zaken tegelijk spelen.
Maar goed, dit is ook de hobby en de video wordt hopelijk interessant 😁
Earth problem, so start by pulling your connections on your main amp first.
I have had this happen it's bad earth from your mains I had to spend a lot of money on big thicker cables upgraded all power boards.
Hi, thanks. Do you mean power boards in your amplifier?
it is a ground problem, turn the power cord 180 degrees at worst take some tape and isolate the ground (just for testing)
Hi, thanks for watching 👍
Turning the power cord was actually one of the first things I tried. No effect.
I still have to use a power cord without the ground tho.
I will try that in the coming days 👍
Try to connect a powercable without a ground and see if the hum disappears.
Maby try looping grounds can help you
Turn off one piece of equipment at a time till hum stops, then examine that pieces connections, something seems loose. Not an engineer.
Try 2 wiggel the cords somting is not connect good think you have 2 pices talking 2 Each other end the having en good rublel. Strenge things happen
Hi, I did even change the interlink, and it definitely became less loud. It did not disappear unfortunately 🤷♂️
Thanks for the support👍