Re: [IRCA] Noisy Modem

[Patrick Martin <mwdxer@xxxxxxxxx>]

Craig,

Radio Shack had small chokes but they want $10 a piece for them and the salesman said he doubted they would work. I guess I could mail order for toroids. Any suggestions on size? I can run over to Home Depot and probably find metal screening. That is a great idea. Ground the screening to the coax connector on the modem, or run a separate ground from under the house? Thank.

73,

Patrick

Patrick Martin
Seaside OR
KGED QSL Manager

> From: bubba@xxxxxxxxxxxxxxxxxxxx
> To: irca@xxxxxxxxxxxxxxxx
> Date: Thu, 17 Oct 2013 07:39:35 -0400
> Subject: Re: [IRCA] Noisy Modem
> 
> > Tonight I did a bit of experimenting and wrapped the Internet/phone  Modem 
> > in
> > tin foil and the noise cut down75%, at least. I did not wrap it too well, 
> > but
> > the plastic box is covered in holes for air as it does get warm. But maybe 
> > I
> > could get a metal box and put air holes in it and see if that would shield 
> > it.
> > Too bad is does get warm, but maybe there is hope after all.
> 
> Try using metal screen as what is used in windows.  Lets air through but 
> blocks noise.  Also, see if the cables in/out can be wrapped in a toroid. 
> That blocks RF on the outside of the cables.
> 
> Craig Healy
> 
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