> as soon as the KIO3UPKT is plugged in I get the hum. The KIO3UPKT
> seems to function just fine in all other ways except for inducing
> this noise. Any ideas???
*BOND* the chassis of the K3/K3S, your computer, your power supply,
and your HiFi system together with a 1/2" braid, #12 or larger wire.
Make sure both the computer, power supply and HiFi supply are all
connected to the same outlet/back box. SeeK9YC's excellent tutorial:
<
http://audiosystemsgroup.com/GroundingAndAudio.pdf>
73,
... Joe, W4TV
On 3/31/2018 12:40 PM, Fred Bennett wrote:
> Howdy folks...
>
> I've been chasing this problem for a while thinking it was in my audio
> system.....but NO!! I use a laptop computer with an external HIFI audio
> board. The HIFI audio board drives a very nice amplified JBL speaker
> system with a subwoofer. The external audio board occupies one USB port
> on my laptop....when I plug the KIO3UPKT cord into any of the other 3
> USB ports on my laptop I get what sounds like 60 cycle hum out of my
> HIFI audio system. It doesn't matter which port I plug the HIFI audio
> interface into....as soon as the KIO3UPKT is plugged in I get the hum.
> The KIO3UPKT seems to function just fine in all other ways except for
> inducing this noise. Any ideas???
>
>
> Stumped.... 73...de Fred N9TA Crawfordsville, IN.
>
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