[Ham-Computers] Computer noise in receiver

Tue, 23 Dec 2003 17:23:23 -0500

It may be the easiest, but is not the least expensive. The problem is no
shielding. You can spray the inside of the monitor with material to reduce the
radiation issue. However, it can be dangerous, so you need to follow the
instructions! I know of several who did this with good results.	

Moving the monitor farther away also helps. 	

You can also use a laptop computer.	

I don't use a computer in the same room with the radios, so I never have the
problem	
.

----------
From: Woody <[email protected]>
To: [email protected]
Subject: Re: [Ham-Computers] Computer noise in receiver
Date: Tuesday, December 23, 2003 4:36 PM

Hi Jim:

The easiest way to solve your interference problem is to replace the CRT monitor
with an LCD flat panel monitor.  LCD monitors do not cause interference like a
CRT monitor.  

You can also try changing the vertical sync rate and the display resolution. 
This will not eliminate all interference, but it will change the frequency of
the interference so that you may find a combination that you can live with. 

Depending on the interference level, you may also reduce the interference by
placing a couple of large ferrite chokes or torroids on the video cable at both
the monitor and PC ends of the cable.

----- Original Message ----- 
  From: wxfreqrs 
  To: [email protected] 
  Sent: Tuesday, December 23, 2003 2:38 PM
  Subject: Re: [Ham-Computers] Computer noise in receiver

  1. move monitor
  2. tear monitor apart and put rf shielding inside
  3. buy rf shielded monitor
  4. move radio

  Don
  Ask me no questions and I will tell you no lies
  http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=KMSPASCA1
  real time obs site
  http://www.jcmsara.org  Ham radio link

  ----- Original Message ----- 
  From: "Jim Isbell" <[email protected]>
  To: "Mail list for Ham & Computers" <[email protected]>
  Sent: Tuesday, December 23, 2003 9:04 AM
  Subject: [Ham-Computers] Computer noise in receiver

  > I have a problem that perhaps someone else here has solved.  When the
  > computer is running I have a fluttering noise in the receiver that is
  > strong enough to reduce my receiving ability by at least one s-unit.
  >
  > The noise seems to be related to the monitor or monitor drive as it goes
  > away when I turn off the monitor.
  >
  > Any suggestions???
  >
  > _______________________________________________
  > Ham-Computers mailing list
  > [email protected]
  > http://mailman.qth.net/mailman/listinfo/ham-computers

  ---
  Outgoing mail is certified Virus Free.
  Checked by AVG anti-virus system (http://www.grisoft.com).
  Version: 6.0.554 / Virus Database: 346 - Release Date: 12/20/2003

  _______________________________________________
  Ham-Computers mailing list
  [email protected]
  http://mailman.qth.net/mailman/listinfo/ham-computers

--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---
_______________________________________________
Ham-Computers mailing list
[email protected]
http://mailman.qth.net/mailman/listinfo/ham-computers