Laptop Hum
DJ spider
external soundcard. I get an annoying hum when the laptop ir running
and this gets worse when the external HDD spins up. (I have all my
songs on it, but backed up on CDs) Any idead how I can cheaply stop
this? I have seen the earth loop isolators on the PCDJ UK site but they
are £15 each and I would need 3 of the them. As we work in Euros here
in Ireland, that is a bit expensive. I have seen ferrite coil things on
ebay for a
lot less would they work? All suggestions welcome. Oh and I know it's
early, but happy xmas!
gort
> No not a smelly computer! I have a laptop running PCDJ with a trust
> external soundcard. I get an annoying hum when the laptop ir running
> and this gets worse when the external HDD spins up. (I have all my
> songs on it, but backed up on CDs) Any idead how I can cheaply stop
> this? I have seen the earth loop isolators on the PCDJ UK site but they
Is this hum coming from inside the laptop, via anything plugged into the
audio ports ie speakers, the power supply if external etc?. Bit more info
please.
Dave
DJ spider
battery. The hum is reduced but still get a whine from the HDD when it
spins. Thinking of putting ferrite rings around all the cables would
this work?
gort
> I have unpluged the power supply for the laptop and run it on the
> battery. The hum is reduced but still get a whine from the HDD when it
> spins. Thinking of putting ferrite rings around all the cables would
> this work?
That would suggest that hum is not normal ac hum. You could try ferrite
rings, but I doubt in a laptop you will find enough space. Your not
confusing this ' hum' with the motor noise from the disk drive are you?. If
you are, as your whine comment suggests, then this is something you will
have to live with or get an Apple laptop. I know on Apples they take care
to reuduce mechanical noise as much as possible.
Dave
DJ spider
gort wrote:
> That would suggest that hum is not normal ac hum. You could try ferrite
> rings, but I doubt in a laptop you will find enough space. Your not
> confusing this ' hum' with the motor noise from the disk drive are you?. If
> you are, as your whine comment suggests, then this is something you will
> have to live with or get an Apple laptop. I know on Apples they take care
> to reuduce mechanical noise as much as possible.
>
It is the hum from the power supply for the laptop as I have run it
without it connected and I get no noise. The HDD is an external seagate
250GB, this has a separate power supply and it does make a whine when
using it without the soundcard/amp connected. but this gets amplified
whrn connected up to use as a Disco setup. I use my laptop for doing
discos and karaoke with PCDJ
gort
> It is the hum from the power supply for the laptop as I have run it
> without it connected and I get no noise. The HDD is an external seagate
> 250GB, this has a separate power supply and it does make a whine when
> using it without the soundcard/amp connected. but this gets amplified
> whrn connected up to use as a Disco setup. I use my laptop for doing
> discos and karaoke with PCDJ
Ok then its the PSU. Is it a switched mode or linear ie does it use a
transformer or not?. If its an SMS PSU I would see if you could get hold of
similar one and try it, taking care with polarity etc.
Dave
DJ spider
tried it without the HDD connected and the laptop on battery and I get
no hum or whine. They both have transformers inline. So the power
supplies are at fault I need to stop this ASAP as I have a gig next
weekend.
Trev
"DJ spider" <djspi...@yahoo.com> wrote in message
news:1165086441.1...@f1g2000cwa.googlegroups.com...
Hum.