[Elecraft] RFI, KUSB - outcome

[David Ferrington, M0XDF]

do you have the details of that mod please?
73 de M0XDF, K3 #174, P3 #108
-- 
When you want to test the depths of a stream, don't use both feet. 
-Chinese Proverb

On 12 Oct 2010, at 12:34, Ignacy wrote:

> 
> I checked KUSB (bought 1.5 years ago) and the shield was not connected to the
> RS232 plug. After grounding, the white noise decreases dramatically but some
> noise still remains. Below the band noise on 160m noise with a  vertical and
> above the noise with K9AY.
> 
> The other USB adapters that I tried have the grounding and have very low or
> no noise. Unfortunately they do not come back from hibernation like KUSB
> does.
> 
> Elecraft support pointed to a grounding  modification of KIO3. My K3 was
> supposed to have all the mods done when in Aptos earlier this year. I will
> find out later whether KIO3 was modified.