[CQ-Contest] [RTTY] Radio interference problem

Andrei Nevis v49a at yahoo.com
Wed Dec 28 13:46:31 EST 2005

Hi all,
  I found from my own experience, that I have to put as many toroids of different kinds on every RF cable from both ends and on every Power cable coming to every device, such as computers, amplifiers etc.
  As far as I did this I got rid of all interferences.
  I am using two transcievers, two ampifiers, one desktop computer and one laptop, and some other units such as SWR meters etc.. All this stuff is located on one table and under the table, close to each other, my radio Room is not too big.
  Maybe I overdid and put too many toroids but now I am happy, no interferences.
  Happy New Year to all!
  73's Andrei EW1AR-NC2N

  Both I and Jim KD0S have had the noisy monitor issue, and have resorted to
purchasing monitors that are more quiet. The only way we got the job done
was to test individual monitors from a computer store that would let us do
that. Some will let you do that, and some will not.

Have tried the ferrite and it didn't quiet things down enough. Have not
tried wrapping in foil, that may work.

Also, have had instances where the cabling to the radio from the computer
ran next to a monitor, and it caused a lot of hum/ noise problems.

I wish you the best, 73 HNY and God Bless!

Todd , WD0T
----- Original Message ----- 
To: "K8JWT" ; "N1MMLogger" ;
"CQ-Contest" ; 
Sent: Wednesday, December 28, 2005 8:04 AM
Subject: Re: [CQ-Contest] [RTTY] Radio interference problem

> Have you tried wrapping the monitor cable with foil. Not all video cables
are created equal. If this does not help try wrapping the monitor making
sure to slit the or punch the foil for all of the vent/cooling holes in the
case. A pencil will work well for opening up the vents.
> Bob
> >
> > From: "K8JWT" 
> > Date: 2005/12/27 Tue PM 09:45:49 EST
> > To: "N1MMLogger" ,
> > "CQ-Contest" , 
> > Subject: [RTTY] Radio interference problem
> >
> > 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
> >
> > 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.
> > _______________________________________________
> > RTTY mailing list
> > RTTY at contesting.com
> > http://lists.contesting.com/mailman/listinfo/rtty
> >
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