More on the mystery...
I have two amps on the shelf above my Sony 1435 display I use for
contests. Using TR in full screen DOS display (EGA I think), or a
Windows full screen mode, the SB221 causes fierce wobble on the screen.
The AL1200 causes none at all, not even a little.
If I am using the SB221, running TR in a DOS box in W98 using 1024x768 @
60 Hz display does not give the wobble, nor is there screen distortion.
On the SB221, the wobble does not change I when throw it to transmit
(400 ma standing current).
The fan is an open construction with a "C" shaped core with the winding
opposite the armature. It has a "wobble" in the sound it makes that
seems to match the wobble on the screen.
Has anyone actually traced one of these problems to a specific component
of an amplifier?
- - . . . . . . - - . . . . - - . . - . .
73, Guy
k2av@contesting.com
Apex, NC, USA
----- Original Message -----
From: <TOMK5RC@aol.com>
To: <cq-contest@contesting.com>
Cc: <nccc@contesting.com>; <W1RFI@arrl.org>
Sent: Thursday, January 20, 2000 10:33 AM
Subject: [CQ-Contest] Monitor Woes - Two more solutions
>
> I have gotten two more noteworthy responses to the problem of 60Hz
ripple in
> computer monitors. First, flat LCD displays are pretty much immune
from EMI.
> At $1,000 or more per copy, that cure is a bit pricey. N1RC also
suggests
> that the EMI may be coming in on the power and data cables. Adding
snap-on
> torroids may be a solution.
>
> Tom, K5RC
>
>
> --
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>
>
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