Ah, but did it use the same peripherals? That might tell a lot.
--Lou, K2LKK
At 07:57 AM 4/21/02 -0700, you wrote:
>Thanks for that info. Yes, we can temporarily disconnect the cables from
>the network. What would be the best way to determin if it is the power
>supply?
>The interesting thing about this, my brothers old computer didn't create all
>of this noise!
>----- Original Message -----
>From: "Louis Kim Kline" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Saturday, April 20, 2002 5:48 PM
>Subject: Re: Removing computer interference from radio
>
>
> > I might be especially inclined to suspect the network cables. They are
> > long, and not always shielded as well as they should be. If the shield
> > isn't great, they could represent a better radiator than most of the other
> > cables. Can you temporarily disconnect the machine from the network and
> > see if that makes any difference? Perhaps some combination of better
> > shielding, grounding and ferrite can be helpful here. Unfortunately, when
> > I've tried to use ferrite in the past, I've had trouble getting enough
> > inductance to really block signals in the MW and HF spectrum. If
> > disconnecting things doesn't identify the problem, then I'm betting on the
> > power supply.
> >
> > Like I said before, I wish you luck. That sounds like it will be a sticky
> > problem to arrest.
> >
> > 73, de Lou K2LKK
> >
> > At 09:02 AM 4/20/02 -0700, you wrote:
> > >Hi Lou,
> > >
> > >We tried turning off the monitor and the result was the same. The next
> > >thing to try is ferrite cores on the cables. The only things hooked up
>to
> > >the computer are: a montor, keyboard, mouse and network cables.
> > >
> > >Russ
> > >----- Original Message -----
> > >From: "Louis Kim Kline" <[log in to unmask]>
> > >To: <[log in to unmask]>
> > >Sent: Saturday, April 20, 2002 7:48 AM
> > >Subject: Re: Removing computer interference from radio
> > >
> > >
> > > > Hi Russ.
> > > >
> > > > There are numerous sources of interference that can be generated from
>a
> > > > computer. A good place to start is to turn the monitor off and see if
>the
> > > > noise goes away. Some monitors generate a lot of noise. Sometimes
> > > > changing the video signal cable can make a big difference. I
>experienced
> > > > that with a NEC monitor that I used to have. You can try using
>ferrite
> > > > cores on the cables coming out of the computer, although I've had
>rather
> > > > dubious results.
> > > >
> > > > I also had a computer that had a rather noisy SCSI controller, and a
>leaky
> > > > SCSI cable. Changing the SCSI cable went a long way towards reducing
>the
> > > > noise output.
> > > >
> > > > I have found that sometimes the switching supply in the computer can
> > > > generate a lot of crud also. If this is happening, there isn't much
>you
> > > > can do about it short of replacing the supply with a better one. The
> > > > bottom line is, this probably won't be easy to knock out.
> > > >
> > > >
> > > > Quiet computers are hard to find. I usually hang on to them with a
>death
> > > > grip when I find one. I cannot get this one that I am typing on
>anywhere
> > > > near a radio or television because it has one of those noisy switching
> > > > supplies.
> > > > 73 and good luck, de Lou K2LKK
> > > >
> > > >
> > > >
> > > > At 08:30 AM 4/19/02 -0700, you wrote:
> > > > >Does anyone have any ideas on how to remove computer interference
>from
> > >the
> > > > >radio?
> > > > >
> > > > >Russ
> > > >
> > > > Louis (Kim) Kline, A.R.S. K2LKK
> > > > e-mail: [log in to unmask]
> > > > Work e-mail: [log in to unmask]
> > > > Work Tel. (585) 697-5753
> > > >
> >
> > Louis (Kim) Kline, A.R.S. K2LKK
> > e-mail: [log in to unmask]
> > Work e-mail: [log in to unmask]
> > Work Tel. (585) 697-5753
> >
Louis (Kim) Kline, A.R.S. K2LKK
e-mail: [log in to unmask]
Work e-mail: [log in to unmask]
Work Tel. (585) 697-5753
|
