[Elecraft] K3 serial cable shielding / noise question

[Alan Bloom]

On Thu, 2008-03-20 at 01:39, M1PAF wrote:

> The issue I have is this: when I use a USB serial adapter I get no
> additional noise issues when the computer is polling the rig. However, my
> computer has a serial port which I would rather use. I made up a cable with
> pins 2, 3, 4, 5, and 6 straight through and the cable shield soldered to the
> shell of the d-type that connects to the K3. When I use this cable the radio
> picks up bursts of noise from the noise sense antenna (which is not good if
> I'm using it to null out other local noise).

You might try grounding the shield to the shell at the opposite
(computer) end.  It is normally recommended to ground the shield at only
one end, but you might try it both ways (computer end only or both ends
connected).

Al N1AL