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[TenTec] Computer noise in radio

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Subject: [TenTec] Computer noise in radio
From: Steve Ellington" <n4lq@iglou.com (Steve Ellington)
Date: Tue, 29 Sep 1998 19:48:28 -0400
Does this mean that you actually tried this other monitor on your built up
computer and it didn't generate noise or are you just comparing
them as they sit? Most computer noise is generated within the power supply
and travels along the case and external cables ie the monitor cable. Two
things I've noticed over the years are:

1. Using open wire feed or coax with a bad match seems to be worse about
picking up this kind of noise.

2. Installing .01mfd disc capacitors across the ac power input leads INSIDE
the power supply reduces the noise. Simply solder a capacitor from each
power lead (hot and neutral) and connect their other ends to chassis ground.

Steve Ellington
Amateur Radio Operator N4LQ
>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.

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