[CQ-Contest] [RTTY] Radio interference problem

Gordon LaPoint n1mgo at arrl.net
Wed Dec 28 07:22:58 EST 2005

On Tue, 2005-12-27 at 21:45, K8JWT wrote:
> Sorry for adressing multiple reflectors but this problem is killing my capabilities to operate.
> I am receiving interference from my computer monitor mainly in the 20 meter band that almost obliterates the PSK-31/RTTY section of the band. I have tried the available chokes from Radio Shack with no improvement. This interference also effects 15meters slightly. No problems with 40 or 80 meters.
> Monitor is about 4 feet away from the radio/tuner setup with cables for each seperated as well as possible. Monitor is almost brand new CRT type. I have returned to point of purchase for exchange which they did but the problem persists.
> Any suggestions would be very helpful. . .
> Jacob Tennant - K8JWT
> PS: I did wrap all of my exposed coax with alluminum foil which dropped the interference a little bit but not much. Also checked all of the PL-259 solder joints and they are good.
   I found that switching video modes, even just the refresh rates, can
make a big difference.  The best fix is to use an LCD monitor instead of
a CRT.  I had one CRT that coating the inside of the case with
conductive paint, toroids on all cables, and so on did not fix, just
changed it out for a LCD monitor this fall and all the interference went
Gordon - N1MGO
n1mgo at arrl.net

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