[DogParkList] DogParkList Digest, Vol 37, Issue 6

[Terrence R. Redding, Ph.D.]

While listening to the noise, try unpluging one lead at a time.  Start with
the coax, and finish with the power cord.  Try to unplu other connections to
the radio that wont turn it off.  The idea is to listen to the noise as you
unplug each lead.  When you unplug and kill the noise you will know that you
have found the signal path.

If the power source is the source the noise will persist a moment before
dying out.

Terry 


On 8/26/07 11:22 AM, "dogparklist-request at dogparksoftware.com"
<dogparklist-request at dogparksoftware.com> wrote:


> Thanks for so many replies with suggestions. I have noticed the noise

> in the past, however, like Jim said it seems worse today. I do have a

> common ground to all equipment except the iBook lap top which is

> located with couple feet of my IC-736. I did quickly attach a ground

> to the computer and the common point, without any drop in the noise

> level. I'm using the USB CI-V interface from Black Cat Systems. I

> haven't tried toroids on the leads. Wouldn't know which or where to

> purchase such. It would seem to me that the offending noise being

> generated must have a specific frequency such that it just causes

> interference on the 20 meter band. It could be on other bands, but

> just not noticeable. Also, I've noticed the Cocoa Modem program

> doesn't cause noise. Will try the battery idea tomorrow. Thanks Tom

> N7KCX