[IRCA] Modem Noise update

[Bob Young <bobyoung53@xxxxxxxxxxx>]

I think a modem would still fall under the part 15 rules as a class B digital device or at least as an unintentional radiator,

 

Bob Young

Millbury, Ma

> ------------------------------
> 
> Message: 7
> Date: Wed, 23 Oct 2013 10:22:49 -0400
> From: "Paul B. Walker, Jr." <walkerbroadcasting@xxxxxxxxx>
> To: Mailing list for the International Radio Club of America
> <irca@xxxxxxxxxxxxxxxx>
> Subject: Re: [IRCA] [NRC-AM] Modem Noise update
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> it may or may not be a part 15 device.. my modem doesnt indicate that it is.
> 
> Paul
> 
> 
> On Wed, Oct 23, 2013 at 10:19 AM, Bob Young <bobyoung53@xxxxxxxxxxx> wrote:
> 
> > Why don't you complain to the FTC that it is not shielded according to
> > part 15 inteference levels or something like that? We should band together
> > and find the proper government bureau to complain to, although we all know
> > complaining to the do nothing FCC won't do any good.
> >
> >
> > Bob Young
> >
> > Millbury, Ma
> >
> >
> >
> > From: mwdxer@xxxxxxxxx
> > To: irca@xxxxxxxxxxxxxxxx
> > Date: Wed, 23 Oct 2013 01:34:39 -0700
> > CC: am@xxxxxxxxxxx
> > Subject: Re: [NRC-AM] [IRCA] Modem Noise update
> >
> >
> >
> >
> > There seems to be an issue with the Arris modems for RF noise. I checked
> > online and found a few complaints. There is little shielding in the plastic
> > boxes and since the only compatible dual modems for cable seems to be
> > Arris ones, it looks like my only choice is to just switch it off when
> > DXing. There is no walwart, and the unit just seems to radiate lots of
> > harmonics. Shielding the unit, helped a bit. But others have tried chokes,
> > shielding, you name it. It seems to be an issue with this unit. The price
> > is $227 as dual modems are not inexpensive, but I guess shutting it off
> > will work. To get phone calls, I will transfer the numbers to my cel phone
> > and the transfer works even when there in no power. But at least, the noise
> > is something I can control. But going into this I figured I may have
> > issues. That is one reason I was reluctant to go with high speed for years,
> > but at least I can switch the modem off. Not what I had hoped, but whatever
> > works. Thanks for everyones advice!
> > ..
> >
> > Patrick Martin Seaside OR KGED QSL Manager
> > > From: earlthenut@xxxxxxxxx> > > > On Friday, October 18, 2013 10:40 PM,
> > Patrick Martin <mwdxer@xxxxxxxxx> wrote:> > > I checked today and yes the
> > modem noise is still there, just less with the shield. I have hooked up a
> > switch to just click it off when I want to DX. I can forward my calls to
> > the cel phone so I will still get them. I will have to come up with
> > something else. Maybe there is a dual Modem out there that does not QRN. If
> > not, I will just have to turn it off. Not convenient but it works. > At
> > least the cable creates no noise. I also have an idea, the QRN may be
> > getting into the power.> > Patrick> > Patrick Martin> Seaside OR> KGED QSL
> > Manager >
> >
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> End of IRCA Digest, Vol 114, Issue 73
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