[R-390] Ham Shack Grounding Help!!!!

[Roy Morgan]

At 06:24 PM 6/19/02 -0400, you wrote:
>I am running my R-390A along side of a computer.  The problem I've been
>having is the noise that the computer puts on the radio.

Kim,

You can take two approaches:
1) Get rid of your computer, or never turn it on.  This takes strength
2) Solve the noise problem.  This may take work.

Choice 2) may involve any or all of the following:
  - Put noise suppressor chokes on the computer wires
  - Get a different computer
  - Feed your receiver with good coax the whole way in from the antenna
  - Move your antenna to a place farther away from the computer
  - Rework your antenna situation so it is fed with balanced feed lines, 
carefully shielded, and with noise suppressors on  the coax.
  - Change your antenna completely to a different kind (balanced dipole or 
a loop instead of a vertical, for instance.)
  - Ensure your electrical outlets have good ground wires
  - Run the computer and radio on different power circuits
  - Add a signal ground to your receiver
  - Install noise suppressor outlet strips

The ARRL publishes a good book on RFI and how to cure it.. Some if it is 
for interference caused by your transmitted signal getting into other 
equipment but the techniques apply in any RFI situation.  If your case is 
difficult to solve, I suggest you get that book.

Roy

- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
7130 Panorama Drive, Derwood MD 20855
Home: 301-330-8828 Work: Voice: 301-975-3254,  Fax: 301-948-6213
roy.morgan@nist.gov --