Interference (noise) when using AC power with my laptop...
Interference (noise) when using AC power with my laptop...
...That's the problem!
Whenever I have my laptop plugged into the wall via AC power and have my sound being routed to a mixer and amp (P.A.), I get a swishy, airy, white noise type of sound. Not a typical 60Hz AC ground loop, which I've had plenty of. If I pull the plug and run on batteries, it immediately returns to sounding like it should.
I am running the laptop plugged into a guitar effects rack unit and am using the power conditioner. Additionally, that whole rack unit has http://www.ebtechaudio.com/humxdes.html on the end of it.
I only have a 2 hour charge on my laptop batteries max and for a 90 minute set, that's cutting it too close to use battery power. Shouldn't I be able to run the laptop using AC power and not have to settle for all kinds of interference?
Any help would be appreciated.
Whenever I have my laptop plugged into the wall via AC power and have my sound being routed to a mixer and amp (P.A.), I get a swishy, airy, white noise type of sound. Not a typical 60Hz AC ground loop, which I've had plenty of. If I pull the plug and run on batteries, it immediately returns to sounding like it should.
I am running the laptop plugged into a guitar effects rack unit and am using the power conditioner. Additionally, that whole rack unit has http://www.ebtechaudio.com/humxdes.html on the end of it.
I only have a 2 hour charge on my laptop batteries max and for a 90 minute set, that's cutting it too close to use battery power. Shouldn't I be able to run the laptop using AC power and not have to settle for all kinds of interference?
Any help would be appreciated.
He likes a whiskey drink, he likes a cider drink, he likes a vodka drink, he likes a drinky-drink.
Your laptop power brick has a ground loop. I normally run hum-x on each humming unit. In your case, if that's the only hummer, then just put the hum-x on that.
The other solution is to get a 3-prong to 2-prong adapter, and that will elimitate the hum in your laptop. Most people report that this is safe to do.
The other solution is to get a 3-prong to 2-prong adapter, and that will elimitate the hum in your laptop. Most people report that this is safe to do.
Nebulae,
I am using the Hum-X as the last/first thing on my rack (my power conditioner is plugged into the Hum-x...all other components plug into the same power conditioner) before going into the wall for AC power.
Is it possible to have to need another Hum-X somewhere down the line....say, plug my laptop into a Hum-X and then into the power conditioner? I always thought that one Hum-X in a line/power strip would handle ALL the loops/hum that might exist normally.
Will try the 3-2 adapter to see if that helps first.
Thanks for the advice!
Daddy?!
I am using the Hum-X as the last/first thing on my rack (my power conditioner is plugged into the Hum-x...all other components plug into the same power conditioner) before going into the wall for AC power.
Is it possible to have to need another Hum-X somewhere down the line....say, plug my laptop into a Hum-X and then into the power conditioner? I always thought that one Hum-X in a line/power strip would handle ALL the loops/hum that might exist normally.
Will try the 3-2 adapter to see if that helps first.
Thanks for the advice!
Daddy?!
Last edited by Daddy?! on Thu Jul 31, 2008 6:00 pm, edited 1 time in total.
He likes a whiskey drink, he likes a cider drink, he likes a vodka drink, he likes a drinky-drink.
............
If your equipment has a true safety ground connection, do not use a plug adaptor to defeat it. Doing so could be extremely serious (i.e. death) if the equipment develops a fault!
Tried the 3-2 adaptor and immediately it was a perfect fix! Chalk one up for the home team. :Dnebulae wrote:that hum-x will only work for the unit that's causing ground hum...you can't put it at the end of a chain of items and have it elimate all of them.
either put the hum-x on the laptop brick, or use the 3-to-2 adapter. :)
report back with your findings.
^ agreed, which is why I'd get a seperate hum-x for each offending hummer...but that's expensive. :cry:
but you can use the adapter ($2) to find out if that'll do the trick, and then purchase the hum-x as needed.
Since the 3-2 solved the problem, is it safe to continue with it, or would I do better/safer to buy another Hum-X and use it in place of the 3-2 adaptor? Also, is there a possibility that the Hum-X may NOT solve the problem like the 3-2 adaptor did? (Wouldn't that beat all? :evil: )
Thanks to all for your help....that interference was going to be very bad at a gig. 8O
He likes a whiskey drink, he likes a cider drink, he likes a vodka drink, he likes a drinky-drink.
I think you can be fine with the 3-2 adapter...many people have reported it to be ok...
I wanted peace of mind so I bought the hum-x for the laptop adapter. It's gonna work for sure because it basically does what the 3-2 adapter does, but it does it safely.
Up to you - if you fry yourself, don't blame me. Just bequeath me your license for Live.
I wanted peace of mind so I bought the hum-x for the laptop adapter. It's gonna work for sure because it basically does what the 3-2 adapter does, but it does it safely.
Up to you - if you fry yourself, don't blame me. Just bequeath me your license for Live.
Eloquently put! Got any use for a SONAR license, too? Thanks! I'll probably end up buying another one 'just to be safe'. Peace of mind is sometimes worth a set amount of money.....in this case, probably about $59.99.nebulae wrote:I think you can be fine with the 3-2 adapter...many people have reported it to be ok...
I wanted peace of mind so I bought the hum-x for the laptop adapter. It's gonna work for sure because it basically does what the 3-2 adapter does, but it does it safely.
Up to you - if you fry yourself, don't blame me. Just bequeath me your license for Live.
While I'm at it, I just find the term 'Kraut Rock' funny. It makes me quietly chuckle to myself, even though I've really no idea what it is. I am lead to believe that it has a somewhat negative connotation associated with it. Perhaps a bit like 'hair metal' is regarded in the states.
Oy!!
He likes a whiskey drink, he likes a cider drink, he likes a vodka drink, he likes a drinky-drink.