[R-390] powerline noise - it's dead, I've killed it!

Tue, 8 Apr 2003 09:47:56 -0700

Good information Dave,

My info with respect to the Ethernet spread spectrum architecture was
entirely beside the point, I'd never thought of the Linksys power source: if
there's a switchmode wall-wart in your house, replace it with a linear!

Bob

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Dave and Sharon Maples
Sent: Monday, April 07, 2003 4:49 PM
To: Terry O'Laughlin; [email protected]
Subject: RE: [R-390] powerline noise - it's dead, I've killed it!

All: I had a Linksys hub that trashed everything across the HF spectrum.  I
got a 1-amp linear regulator board (kit mfr beginning with V...can't
remember the name but I believe it's German.  Vellemann???) and put it in a
small box with a Radio Snack 6-volt transformer and such, and set the device
to produce what the original switch-mode wallwart produced.  End result...NO
NOISE anywhere.  For the Linksys stuff, and similar, that's an easy fix for
switch-mode trash...

Dave Maples

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Terry O'Laughlin
Sent: Sunday, April 06, 2003 10:33 PM
To: [email protected]
Subject: Re: [R-390] powerline noise - it's dead, I've killed it!

In retrospect, I should have suspected the network all along.  But I put it
in when I was relatively inactive as an SWL and never put two and two
together.  The CAT-5 wiring stuffed into this house made an excellent
antenna for the crud the hub generated.

This Linksys unit is definitely defective.  I have other Linksys equipment
in the house and they all appear to be dead quiet.  The defective hub puts
out one hell of a harmonic loaded buzz in the 410-430 kHz range.

73     Terry O'     WB9GVB

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