>From the PC, try changing refresh rate and/or screen resolution. You may
find that interfering signal decreases.
Bob
-----Original Message-----
From: Dirk Hacker
Sent: Sunday, December 26, 2010 4:49 PM
To: rfi@contesting.com
Subject: [RFI] Advice for LCD cmptr RFI
Hello all,
I have RFI from my LCD computer display that I can't seem to eliminate.
The LCD generates RFI noise at 60Khz-75-Khz intervals at higher freq's (10m
band of 28-30KHz.)
I have put "clamp-on -type" ferrites on the LCD cable (one on each end),
however
they don't supress the RFI
what other things should I try specifically to supress RFI in 28-30MHz ?
(might I just have the wrong type mat'l in the ferrites to supress higher
freq's
?)
---------------------------------------------------------------
- I have a CE compliant LCD (display itself is quiet)
- The noise goes away if I unplug the video cable
- Using 12foot long cable to the LCD (6ft on LCD & 6ft extension cable;
LCD
cable has small ferrite molded on it)
- computer has 512MB PCI video card that can drive 2 displays (PNY company)
- Changing the refresh rate of the LCD (in display properties) does not
eliminate thew RFI)
- noise is not generated by the P.S. ; I installed a AC-line fitler to
keep
the PS quiet (corcom 6ef1f)
-----------------------------------------------------------------
Thanks for your thoughts and comments about this.
Dirk H
KE7WVZ - Phoenix, AZ
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