[Elecraft] RFI, KUSB and MFJ-4225

[Jim Brown]

  On 10/5/2010 5:38 PM, Ignacy wrote:
> When KUSB is connected to K3, it emits white noise of about 5 Khz BW around
> 1833. I attributed it to U-verse. The noise is there when KUSB is fully
> inserted into K3 but no noise when only the grounds are connected.  The
> noise is some 10 db above band noise when using K9AY that is some 100 ft
> away. A replacement USB adapter is quiet. I used KUSB before it was more RFI
> proof.

I'd call that a defective adapter and send it back for a free replacement.

73, Jim K9YC