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Joined: Jan 2010
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My MSI CR600 audio out to my amp is very noisy when laptop is connected to power adapter but
quite when on it's batteries. Seems to be an often problem based on "internet findings". Have any
of you encountered this and what if any are the remedies other than trying various models.
My Creative labs USB interface ditto noisy!
Nice to be here. Just starting BIB use & learn after many years of being on the periphery. So I'll
enjoy and appreciate the information afforded here.
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Hi Sideliner, Welcome to the forum. You may find a solution if you read this thread Speaker Hum Hope this helps. Regards Michee
Windows 11 64 bit, Biab 2023 1006, Realband 2023 (1)
i7 Desktop Computer 16Gb Memory
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Thanks everyone. I'm waiting for the "Sources" store to open to try the GL Isolater per Mac. My hardware Guy says that 2 prong would be OK but keep an eye. I have till 5:00pm today with Futureshop to return the laptop after putting it thru it's paces for 14 days. Just by accident discovered the noise dilemma yesterday. Might MSI work with me in some fashion as I got the
laptop specifically to have on stage. They offer 2yr warranty in Canada, 3 yr in USA. The unit more
compact than other 16" and 1/2 lb. lighter. So I am dispointed to say the least.
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I have an old extension cord (heavy duty orange) that is short, and someone, cut the ground prong. Illegal here in Ontario but I've used it in some venues. I have 2 solutions for power, an 8 plug thing with separate outputs for 'warts' and power and a 12 output strip thing I got at the Canadian Tire store. I think it's meant for a shop, but almost all my stuff is low power so the thing is useful at home.
John Conley
Musica est vita
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Siedliner-- The safe and simple solution is available for 16.99$US at Radio Shack stores: Ground Loop Isolator Note that it uses RCA phono plug inputs and outputs, so be sure to pick up the right Audio Adaptors to place it between your laptop's earphone output and the PA's inputs. This *will* safely cure that problem for you. Incidentally, it is not a matter of laptop brand or anything of the sort. Fact is that *most* laptops will do this and it is due to UL/CSA etc. safety rulings as to AC grounding. Overkill, perhaps, but we have a great and safe solve in the Ground Loop Isolator. --Mac
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I just cut the ground prong off of the plug. Works great ,of course I'm a licensed Electrical Contractor and Chief Electrical Inspector so I can do those things. Notice John C. does the same and He's a Fire Inspector. Job security.You should buy the Radio Shack device.
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Just watch one thing with that Radio Shack Ground Loop Isolator: keep the large 'barrel' away from other electronics; it can pick up a new hum by itself. Careful placement gets rid of the problem.
BIAB 2024 Win Audiophile. Software: Studio One 6.5 Pro, Swam horns, Acoustica-7, Notion 6; Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors
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If you do decide to go for lifted AC ground, don't cut the prong off, simply pick up a two-prong AC adaptor and use that. Typically 3 for a dollar these days. They are still legal and sold in the States anyway.
--Mac
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I USED to have that problem.
Ebtech Hum-X took care of it.
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Quote:
From the Inspector side of me although they're not part of the permanent wiring.The UL listing for them is not for use as a ground lift but for a half hearted attempt at providing an equipment ground when one is not avaiable ie two pronged receptacle. Older electrical systems, before romex, very often were done with metal clad cable and metal boxes. The yoke of the recpt. was grounded to the box and thus the cable and thus the service grounded conductor ( neutral). By using one of these adapters and running the cover plate screw through the little thingy at the base of the adapter you've provide somewhat of a grounding connection. Not a great one.
All of which only serves to confuse the issue here.
I hope the poor fellow does not take this to mean that he is supposed to put a screw on the adaptor and thus return the lifted ground now...
--Mac
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I got the GL Isolater, so far so good!
Many thanks folks.
Nice to know there's help out there.
Happy 2010. I love the even years.
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But wait, I'm odd.
And Retired.
Did a stint as Asst. Chief then Chief Training Officer.
Then retired.
But I know what to use with what and when. The 2 prong to 3 prong gizmos are illegal here, I've got an old one with a green wire meant to go to the screw on the cover of the 'lectric box. Somewhere.
I used to love the hit and runs on Raves. They get some kid, tap into a panel, (hot) and run a cable over the floor, leave the front panel off, people wandering by going to the bathroom. Good enough for a 'close' order. Tape the doors, while the cops, who had to protect me would gaze at bottles of water with green dots on the lids, opened, go for the warrant, and seize the x.
I did find a HUGE electrical sound system at a Gay pride venue. Illegal. Wrote the guy up Friday at 5. English gear, probably OK but no stickers, no listings. He screamed like a wee girl. Hilarious. Threatened calling the mayor the prime minister suing me for discrimination etc..I said, look says there I'm coming back Tues. a.m. with the electrical inspector..he says "We'll be gone by then!"....I roll my eyes.
Don't electrocute yourselves..have a nice day.
Next I hear him on the phone to some guy in Toronto saying he's gotta use the stuff but he's not PAYING for it. LOL..
Now the whole 3 unit apartment building that was wired with electrolux vacuum cleaner cord in the walls...that was the best...80 feet of it overheated a stereo and burned most of the place down. Western European guy says to the electrical inspector I called, "so vat..all like em at my home country ok dot vay..."
John Conley
Musica est vita
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I once found 16 AWG zipcord inside the walls of an old house in the northeast of the US, too. It was daisy chained to four outlets in two rooms that way, no lessm with the feed coming from the kitchen lighting. The brown rubberoid insulation on the wire was dried and cracked from years of baking under the load.
Don't know why the place didn't flash and burn.
--Mac
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I forget the formula they used but the loss of amperage to the transformer? caused it to overheat? Or voltage? I do remember the fact it was 'undersized' and 2 wire, and 80 feet to 3 outlets and a light.
I've seen way worse in Mexico...lol.
Hot tapping from a pole, just anyone does it.
I've seen pics of India, WAY WORSE!
John Conley
Musica est vita
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I'd expect Voltage Drop on the wire to be the source of any problem.
Luck of the draw whether the heat happens high enough on the wire itself first -- or localizes at the appliance. Well, not luck, exactly, but dependant upon appliance design. The designers could not be blamed in this instance, they did not design the appliance to be used in that manner, of course. Presuming a "proper" AC hookup, the appliance itself was likely a fine design.
That said, I've seen very few internal consumer equipment transformers that could actually start a fire. Most are enclosed in steel or at least well wrapped in fish paper and copper shielding and placed well away from other components in the chassis.
But you know the drill.
Feces occurs.
Right?
--Mac
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It was a very easy investigation. Anyone with 10 minutes of training would see it started on the stereo stand, the guy was returning from the bar and his 3 cats were dead and he was crying his butt off, lost his pictures, albums etc. Place was locked, he was gone 45 mins.
Plywood walls, nice V pattern, lowest point over the stereo. 2 hours to take the ceiling and insulation off the floor, dig out the debris. Remember it like yesterday.
I think there were newspapers all over the stereo, were the heat vents were on the top, but that evidence was just a bit of paper embedded in melted plastic you cut apart and go 'hummmm'....
According to the government electrical inspectors there are almost no electrical fires. If they inspected it......could not happen.
There's one huge difference between the US and here. I studied Fire Engineering at Cinci, and the US inspectors have no power at all. On the other hand you cannot stop a Canadian Inspector from going anywhere at a 'reasonable time'. A rights issue. Good sides and bad sides to that argument, I was always glad I didn't have to get a search warrant to prove some guy had the back doors of his bar locked with chains.
That's why we were all trained as first line electrical inspectors for existing buildings. I did 3 strikes and then used the authority to say, pull an electrical permit within 24 hours and fax it to me, or I order a $100 inspection and the inspector will tell you the same thing, I'm just saving you $100 bucks...
Some days I miss working...I still have my bag with flashlights, electrical testers, and a laser heat tester that works great on panels and outlets, point and shoot. I use that on compressors in bars now, $30 bucks and I record everything once a month. Do the heating and cooling vents too. Those things are like $40 now.
John Conley
Musica est vita
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I miss the job as well but not the politics involved.
Don't even get me started on this one.
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I left both inspections / investigations then training over Politics. New Chief NO enforcement. New Boss, change the program on Monday at 8. Pension plan says 'want 3.6k a month cash and I go 'bring that on NOW'.
John Conley
Musica est vita
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Well, here the Fire Marshall literally owns the scene after a fire.
Note however that it is after the fact of the fire...
--Mac
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