[TenTec] Computer noise in radio

[J. Pursley]

Another method is to go to a TV or electronics parts dealer and see if he has any
aquadag spray or paint. Use it the same way as described below. It should work
better.....joe

Carl Hyde wrote:

> Your monitor is probably of a late design that did not have to meet the more
> stringent FCC emitted noise specifications that older monitors and computers
> had to meet.  The computer industry was successful in watering down the FCC
> requirements just to annoy Ham operators.  So what can you do?  Well one
> approach I have used is to open the monitor and remove the plastic case
> completely.  Spray the complete inside of the case and back with zinc chromate
> paint.  Use a strip of copper foil with conducting adhesive to ground the zinc
> chromate coating to the chassis ground.  Then wrap the power cord and the video
> cable into a large toroid or use a snap-on toroid to eliminate noise on those
> cables.  I have used this method and have also made a mu metal shields for the
> inside of the monitor case.  The paint method is effective and easier.  Hope
> that helps.
>
> Bob Ensminger wrote:
>
> > I would appreciate info on how to get rid of computer noise in HF radio.  I
> > have a new 17" screen for a computer I built up.  When I disconnect screen
> > the noise goes away.  What can I do to filter noise(ie S-7 at various
> > places on ham bands) from getting into radio?
> >
> > My other monitor from the other computer close by does generat some but
> > hardly noticeable.
> >
> > Thanks for help,
> >
> > Bob, KQ7J
> >
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> Carl Hyde
> carl.s.hyde@lmco.com
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>
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