Russ,

Unfortunately, there are a lot of other types of computer equipment that
cause interference, including CPUs themselves.  Some of the RF just gets
transmitted through the connecting cables which act like antennas.

Steve

On Tuesday 9/28/2004 10:15 Russ Kiehne wrote:

>If you have a lot of computer interference, you might check to see if your
>computer's power supply is FCC type B certified.  My brother bought a
>computer with a power supply that was not FCC certified and the interference
>was really bad!
>----- Original Message -----
>From: "Don Bishop" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Monday, September 27, 2004 5:33 PM
>Subject: Re: Synchronous detection
>
>
> > Hi,
> >
> > That's a good point about the modem.  I have a lot of computer
>interference here from this machine.  We have an alarm system in the house
>with a remote
> > control, but the remote is virtually unusable due to the computer
>interference.  Also, the interferrence is a problem on the am band as well,
>so will try the sync
> > to see if that helps at all.
> >
> > Most of the stations around here are quite a distance away.  They are
>clear enough most of the time, but are still weaker than if we were in a
>metropolitan
> > area, so any kind of interferrence is really noticable and often make the
>stations quite hard to listen to.
> >
> > Don W6SMB
> >
> > On Mon, 27 Sep 2004 20:23:29 -0400, Kenneth Lee wrote:
> >
> > My cable modem causes lots of interference and I discovered I can =
> > eliminate
> > the interference by turning on the sync.  I noticed that the upper =
> > sideband
> > will be clear as a bell, and the lower sideband is unreadable.  This is =
> > true
> > on both the Sat800 and the 7600GR. Actually the upper sideband is clear =
> > with
> > sync on or off, but the audio just seems much better with the sync on. =20
> >
> > Anyway, the interference isn't on all frequencies, but it enough to =
> > cause me
> > grief.  I usually turn off the modem, but often I have to leave it on
> > because others are using the internet while I'm trying to DX.
> >
> >
> > 73, Ken -N5SWR
> >
> >
> > -----Original Message-----
> > From: Blind-Hams For blind ham radio operators
> > [mailto:[log in to unmask]] On Behalf Of Steve Dresser
> > Sent: Monday, September 27, 2004 7:50 PM
> > To: [log in to unmask]
> > Subject: Synchronous detection
> >
> >
> > Don,
> >
> > Synchronous detection is one of those features that sneaks up on you =
> > because
> > it doesn't always seem to do much of anything.  Suddenly you notice that =
> >
> > station that should be distorted just isn't.  I have noticed, though, =
> > that
> > the AGC doesn't work as smoothly when synchronous detection is on, =
> > probably
> > because the local oscillator keeps it from noticing the changing =
> > strength of
> > the carrier while the audio itself continues to fade up and down.  I =
> > don't
> > have any good sound technical data to support that theory; it's just my
> > amateur attempt to explain what I'm hearing.
> >
> > Steve
> >
> > On Monday 9/27/2004 18:24 Don Bishop wrote:
> >
> > >Steve,
> >
> > >Thanks for all the clarification.  I've heard people talking about the=20
> > >g radio but when I did a google search I couldn't find the actual specs =
> >
> > >on the radio. Sounds like it may not really be what I'm looking for as=20
> > >I do have the 2010.
> >
> > >I'll have to play more with the synchronous detection on the 2010.  We=20
> > >just moved out of the SF bay area and into the boondocs, so I'm getting =
> >
> > >reintroduced to selective fading on the am band again.  <smile>
> >
> > >Thanks for reminding me of the synchronous feature.
> >
> > >Don W6SMB
> >
> > ---
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> >
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> >